DEPLOYABLE FOOTWEAR AND METHOD OF ALTERING A CONFIGURATION OF A COLLAPSIBLE SOLE TO A COMPACT FORM

Description

TECHNICAL FIELD

In general, the present invention pertains to the art of collapsible sole for collapsible footwear. In particular, the invention relates to a collapsible sole and method of altering a configuration of a collapsible footwear in a compact form configured for transportation.

BACKGROUND ART

It is believed that the current state of the art is represented by the following patent literature: U.S. Pat. Nos. 10,986,895, 8,011,119, 6,895,693, 10,750,818, CN111053322 and KR200351287.

U.S. Pat. No. 10,986,895 from the same co-inventors that is believed to represent the closest prior art discloses a compressible footwear that may include a compressible sole and a compressible upper part that is mechanically coupled to the compressible sole. The compressible sole consisting essentially of multiple compressible cells that are made of a flexible material and have top openings and bottom openings. The multiple compressible cells span over at least a majority of the compressible sole and are configured to undergo a compression while substantially maintaining a thickness of the compressible sole.

U.S. Pat. No. 8,011,119 discloses a personally adjustable footwear with at least one sole layer including: a toe portion, a heel portion, and an intermediate portion. The intermediate portion has openings passing vertically through the layer so that the intermediate portion is elastically flexible to allow relative longitudinal displacement of the toe portion and the heel portion to vary a length of the layer without significant variation in a thickness of the layer. A retention mechanism selectively fixes the toe and heel portions in any of a number of relative positions. Also disclosed are implementations with insertable and removable segments, and with elongated elements sliding in channels.

SUMMARY OF THE INVENTION

The following summary of the invention is provided in order to provide a basic understanding of some aspects and features of the invention. This summary is not an extensive overview of the invention and as such it is not intended to particularly identify key or critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concepts of the invention in a simplified form as a prelude to the more detailed description that is presented below.

The invention was made in view of the deficiencies of the prior art and provides systems, methods and processes for overcoming these deficiencies. According to some embodiments and aspects of the present invention, there is provided a collapsible footwear configured for transportation in a compact form including: a collapsible sole including: a top sheet, extending essentially across entire surface area of the sole; a bottom sheet, extending essentially across entire surface area of the sole; a plurality of lateral support elements, extending between the top sheet and the bottom sheet, in which the lateral support elements extend essentially along an entire width of the sole; a plurality of laterally extending channels formed in-between the lateral support elements and in-between the top and bottom sheets; a plurality of top hinge elements operationally connecting the top sheet and the plurality of lateral support elements of the collapsible sole, in which the top hinge elements are configured to sustain a partial rotation of the plurality of lateral support elements relative to the top sheet; a plurality of bottom hinge elements operationally connecting the bottom sheet and the plurality of lateral support elements of the collapsible sole, in which the bottom hinge elements are configured to sustain a partial rotation of the plurality of lateral support elements relative to the bottom sheet; at least one stopper element disposable between the upper sheet and the bottom sheet; in which the collapsible sole is characterized by reversibly assuming: a collapsed configuration, in which the plurality of laterally extending channels is essentially collapsed and the top sheet is at least one member selected from the group consisting of: in a proximity to the bottom sheet and spaced apart from the bottom sheet; an erected configuration, in which the at least one stopper element stabilizes the plurality of laterally extending channels in an open conformation, whereas the top sheet is at least one member selected from the group consisting of: spaced apart from the bottom sheet and includes a straight planar form; at least one top part, selected from the group consisting of: a collapsible top part; a removable top part.

In some embodiments, the at least one top part is the removable top part, further includes a plurality of connecting elements, configured for readily connecting the collapsible sole with the at least one top part. In some embodiments, the at least one stopper element disposable between the upper sheet and the bottom sheet embodies at least one shape selected form the group consisting of: a rectangular shape, linear shape, trapezoidal shape and cylindrical shape. In some embodiments, the plurality of laterally extending channels is essentially collapsed, by forming an acute angle between the plurality of lateral support elements and the top sheet and bottom sheet, thereby disposing the top sheet within proximity to the bottom sheet. In some embodiments, in the erected configuration, the plurality of lateral support elements is disposed essentially perpendicularly to the top sheet and the bottom sheet. In some embodiments, the at least one stopper element is insertable within at least one of the laterally extending channels, thereby affixing the collapsible sole in the erected configuration, and in which the at least one stopper element is retrievable from the at least one of the laterally extending channels, thereby rendering the collapsible sole alterable into the collapsed configuration. In some embodiments, the plurality of lateral support elements are positioned relative to the upper sheet and the bottom sheet at an angle

selected form the group consisting of: perpendicular angle, acute angle, obtuse angle.

In some embodiments, the collapsible sole includes a frontal portion, a centrical portion and a rear portion, in which the collapsible sole to assume: a folded configuration, in which in the collapsed configuration, the bottom sheet of the collapsible sole is folded about the centrical portion, so that a frontal portion of the bottom sheet is disposed adjacently to a rear portion of the bottom sheet; an unfolded configuration, in which in the erected configuration, the bottom sheet of the collapsible sole is straightened, so that the frontal portion of the bottom sheet forming an approximately straight angle relative to the rear portion of the bottom sheet; in which the centrical portion accommodating a mechanism configured to affix the collapsible sole in the erected configuration.

In some embodiments, the collapsible sole includes a frontal portion, a centrical portion and a rear portion, in which the centrical portion accommodating the at least one stopper element including an essentially trapezoid shape, in which the collapsible sole is configured to assume: a folded configuration, in which top hinge elements are spaced apart from a top portion of the trapezoid shape, and an unfolded configuration, in which the posterior top hinge elements are adjoined to the top portion of the trapezoid shape.

In some embodiments, each one of the laterally extending channels accommodates a stopper element of a linear shape extending essentially along an entire width of the collapsible sole, selected from the group consisting of: a top stopper hinge element including a connection between a top portion of the at least one stopper element and the top sheet, and a bottom stopper element including a connection between a bottom portion of the stopper element and the bottom sheet. In some embodiments, the collapsible sole includes a corrugated shape, in which in the collapsed configuration, the top sheet and the bottom sheet of the collapsible sole are foldable are disposed adjacently to the stopper element. In some embodiments, in the erected configuration, the top sheet and bottom sheet

of the collapsible sole assume an essentially planar form.

According to an aspect of the presently disclosed subject matter is provided a stopper element for collapsible footwear, designed for insertion into lateral channels of a collapsible sole. The stopper element features pivotal functionality that enables compact storage and transport while maintaining structural integrity during use.

The stopper element comprises a central structure from which at least two arms extend. In some embodiments, the central structure comprises an elongated body that extends along a longitudinal axis. This elongated configuration provides a base for attachment of the pivotal arms and facilitates distribution of forces transmitted through the arms during use.

The central structure may be configured for resilient deformation under compressive load. This resilient characteristic allows the stopper element to function as both a structural support and a cushioning system. When the collapsible sole experiences compression during walking or standing, the central structure undergoes controlled elastic deformation, absorbing impact forces and contributing to user comfort.

The stopper element includes at least two arms, each having a proximal end and a distal end. The proximal end of each arm is pivotally connected to the central structure, enabling rotation between two configurations. This pivotal connection may be implemented through various means, including living hinges integrally formed between each arm and the central structure, or mechanical hinges providing discrete pivot points.

The arms operate in two configurations. In the collapsed configuration, the arms are arranged substantially parallel to each other, creating a compact profile suitable for shipping, storage, or insertion into the collapsible sole. In the deployed configuration, the arms extend radially outward from the central structure, creating a multi-directional support system within the lateral channels of the collapsible sole.

In certain embodiments, each arm has a rigidity greater than the rigidity of the central structure. This differential rigidity creates a functional separation where the arms maintain the structural integrity of the collapsible sole in its erected state, while the central structure provides cushioning through its lower rigidity. This design allows the stopper element to serve dual purposes of structural support and shock absorption.

Each arm may comprise a tapered portion at its distal end defining a flat abutment surface. This flat abutment surface is configured to contact the inner surface of the lateral channel when the arm is in the deployed configuration. The tapered design facilitates insertion of the stopper element into the channel while the flat surface enables stable contact and force distribution.

In some embodiments, the tapered portion defines both an upper flat abutment surface and a lower flat abutment surface. These surfaces contact the top and bottom inner surfaces of the lateral channel respectively, creating a secure mechanical engagement that restricts unwanted movement or rotation of the stopper element within the channel.

While the stopper element requires at least two arms, embodiments with four arms provide additional stability. In such embodiments, the four arms extend from the central structure at substantially 90-degree intervals, creating a symmetrical support pattern when deployed. This configuration distributes forces evenly in multiple directions and restricts collapse from various angles of applied load.

In the collapsed configuration of a four-arm embodiment, a first pair of arms may be folded in a first direction while a second pair of arms is folded in a second direction opposite to the first direction. This folding arrangement minimizes the overall profile of the stopper element, facilitating compact storage and ease of insertion into narrow channels.

The stopper element is designed with specific dimensional relationships between its collapsed and deployed states. The maximum cross-sectional dimension in the collapsed configuration may be less than 50% of the maximum cross-sectional dimension in the deployed configuration. This significant reduction in size enables the stopper element to be easily inserted through openings that would be too small to accommodate the deployed configuration.

When integrated into collapsible footwear, the stopper element is disposed within at least one of the laterally extending channels formed between the lateral support elements of the collapsible sole. The collapsible sole itself comprises a top sheet, a bottom sheet, and a plurality of lateral support elements extending between these sheets, with the channels formed between adjacent support elements.

The stopper element is insertable into the lateral channel while in its collapsed configuration. Once positioned within the channel, the arms deploy to their extended configuration, engaging the inner surfaces of the channel. In this deployed state, the arms prevent collapse of the collapsible sole by maintaining the spacing between the top and bottom sheets.

During use of the collapsible footwear, the central structure of the stopper element provides cushioning during compression of the sole. Forces applied to the top sheet are transmitted through the arms to the central structure, which deforms elastically to absorb impact before transmitting the remaining forces through the lower arms to the bottom sheet.

The pivotal nature of the arms enables a single stopper element design to accommodate both compact storage requirements and structural support needs.

The combination of rigid arms with a resilient central structure addresses the competing requirements of structural stability and user comfort. The arms ensure the collapsible sole maintains its erected configuration under load, while the central structure provides dynamic response to impact forces.

The flat abutment surfaces at the distal ends of the arms create stable contact points within the channels, distributing forces over a larger area compared to point or line contact. This reduces stress concentrations and potential wear on both the stopper element and the channel walls.

The multi-arm configuration, particularly the four-arm embodiment, provides omnidirectional support that restricts collapse regardless of the direction of applied load. This is particularly important for footwear applications where forces may be applied from various angles during different phases of the gait cycle. In accordance with some aspects and embodiments of the present invention, there is provided a method of altering a configuration of a collapsible footwear into a compact form, configured for transportation, including: providing a collapsible sole including: a top sheet, extending essentially across entire surface area of the sole; a bottom sheet, extending essentially across entire surface area of the sole; a plurality of lateral support elements, extending between the top sheet and the bottom sheet; in which the lateral support elements extend essentially along an entire width of the sole; a plurality of laterally extending channels formed in-between the lateral support elements and in-between the top and bottom sheets; a plurality of top hinge elements operationally connecting the top sheet and the plurality of lateral support elements of the collapsible sole, in which the top hinge elements are configured to sustain a partial rotation of the plurality of lateral support elements relative to the top sheet; a plurality of bottom hinge elements operationally connecting the bottom sheet and the plurality of lateral support elements of the collapsible sole, in which the bottom hinge elements are configured to sustain a partial rotation of the plurality of lateral support elements relative to the bottom sheet; at least one stopper element disposable between the upper sheet and the bottom sheet; providing at least one top part, selected from the group consisting of: a collapsible top part; a removable top part; compressing the collapsible sole to assume a collapsed configuration, in which the plurality of laterally extending channels is essentially collapsed; in which the top sheet is in a proximity to the bottom sheet or including a corrugated shape; altering a configuration of the collapsible sole to assume an erected configuration, in which the at least one stopper element stabilizes the plurality of laterally extending channels in an open conformation; in which the top sheet is spaced apart from the bottom sheet and includes an essentially planar shape.

In some embodiments, in which the at least one top part is the removable top part, in which the collapsible sole including a plurality of connecting elements, configured for readily connecting the collapsible sole with the at least one top part, the method further includes connecting the collapsible sole with the at least one top part. In some embodiments, the method further includes inserting the at least one stopper element into the at least one of laterally extending channel, thereby affixing the collapsible sole in the erected configuration. In some embodiments, further includes forming an acute angle between the plurality of lateral support elements and the top and bottom sheets, in the collapsed configuration, thereby disposing the top sheet within proximity to the bottom sheet.

In some embodiments the collapsible sole includes a frontal portion, a centrical portion and a rear portion, further includes: folding the collapsible sole to assume a folded configuration, in which in the collapsed configuration, the bottom sheet of the collapsible sole is folded about the centrical portion, so that a frontal portion of the bottom

sheet is disposed adjacently to a rear portion of the bottom sheet; altering a configuration of the collapsible sole to assume an unfolded configuration, in which in the erected configuration, the bottom sheet of the collapsible sole is straightened to assume an essentially planar shape, so that the frontal portion of the bottom sheet forming an approximately straight angle relative to the rear portion of the bottom sheet.

In some embodiments, the collapsible sole includes a frontal portion, a centrical portion and a rear portion, in which the centrical portion accommodating the at least one stopper element including an essentially trapezoid shape, further includes: folding the collapsible sole to assume a folded configuration, in which in the folded configuration, posterior top hinge elements are spaced apart from a top portion of the trapezoid shape; altering a configuration of the collapsible sole to assume an unfolded configuration, in which in the erected configuration, the posterior top hinge elements are adjoined to the top portion of the trapezoid shape. In some embodiments, each one of the laterally extending channels accommodates the stopper element of a linear shape extending essentially along an entire width of the collapsible sole, further includes connecting a top portion of at least one top stopper element to the top sheet of the collapsible sole, and connecting a bottom portion of at least one bottom stopper element to the bottom sheet of the collapsible sole.

In accordance with an aspect of the presently disclosed subject matter, a collapsible footwear comprises a telescopic sole assembly and a removable upper covering element. The telescopic sole assembly includes first and second platform segments configured to support the heel and forefoot regions respectively, with these segments being telescopically movable between collapsed and extended configurations.

The removable upper covering element comprises at least an upper flat part with attachment means for securing to the platform segments. This modular design enables the upper covering to be removed for maintenance, cleaning, or replacement while the telescopic sole provides the collapsible functionality. The upper covering element covers at least a portion of the telescopic sole assembly, protecting the mechanism while providing the aesthetic and functional characteristics expected of footwear.

In some embodiments, the upper covering element further comprises a lower flat part. These upper and lower flat parts may be connected by a curved portion, creating an integrated covering that wraps partially around the foot. The curved portion may be positioned at the front end, forming a toe box or front wall that prevents forward foot movement while leaving the rear open for easy foot entry.

Alternatively, the upper and lower flat parts may be separate disconnected components, allowing independent attachment and potentially different materials or styles for each part. This separated configuration may further include a separate curved midfoot portion that attaches independently, creating a three-piece modular upper system.

The upper flat part may incorporate an elevated midfoot support portion extending upwardly. This elevated portion secures the foot at the instep area, providing stability during wear while accommodating the open-heel design enabled by the front-only curved connection.

The upper covering element may be configured to transition between an unrolled configuration for use and a rolled configuration for storage. This scrollable feature reduces the storage footprint when the footwear is not in use and enables multiple upper coverings to be carried compactly.

The platform segments may each comprise a filled body construction rather than hollow shells. These filled bodies provide structural support and may incorporate materials offering comfort and bounciness characteristics, such as foam or elastomeric compounds that provide energy return during walking.

In certain embodiments, the second platform segment comprises a cavity formed within its filled body. This cavity receives the first platform segment in the collapsed configuration, with the cavity sized to accommodate the entire length of the first platform segment. This design enables maximum compactness, with the collapsed length equaling substantially the length of the second platform segment alone.

The attachment means may comprise apertures in the upper covering element aligning with corresponding securing points on the platform segments, enabling repeated attachment and removal.

The telescopic sole assembly may include multiple telescopically nested structural segments between the first and second platform segments, each potentially having a foot-shaped exterior contour. A locking mechanism may secure the platform segments in the extended configuration, preventing unintended collapse during use.

The first platform segment may comprise an enlarged heel support surface, potentially exceeding 60 mm in width, to distribute weight and enhance stability. This enlarged surface area addresses the particular demands placed on the heel region during normal gait cycles. The method of assembling the footwear involves extending the platform segments from their collapsed state, positioning the removable upper covering element over the extended platforms, and securing it via the attachment means. For transport, this process reverses: the covering element detaches, the platforms collapse telescopically, and the covering may reattach in a transport configuration that protects the collapsed assembly.

The telescopic design offers high compression ratios since the overlapping segments can reduce the footwear length by 50% or more. This uniformity facilitates packing in luggage or storage compartments with defined dimensions.

The modularity of the removable upper covering element enables adaptation to different use scenarios. A single telescopic sole assembly may pair with multiple upper coverings suited for various activities or aesthetic preferences. This modularity also simplifies manufacturing by allowing separate optimization of the mechanical telescopic components and the aesthetic upper elements.

The configuration with multiple nested segments between the platform ends distributes mechanical loads across multiple interfaces. Each telescopic joint carries only a portion of the total structural loads, potentially increasing durability compared to designs with single pivot or fold points. The foot-shaped contouring of these segments enables that load paths follow anatomically appropriate trajectories.

The protection provided by the upper covering element extends beyond mechanical shielding. It prevents ingress of debris that could interfere with the telescopic mechanism while also maintaining the visual appearance expected of conventional footwear. The covering element bridges the gap between pure mechanical function and the aesthetic requirements of wearable products.

The platform segments of the telescopic sole assembly may each comprise a filled body construction rather than hollow shells. This filled body provides enhanced structural integrity and support distribution compared to hollow designs. The filled body may comprise materials such as foam, polymer materials, composite materials, or elastomeric materials that provide appropriate cushioning and structural properties for footwear applications.

The second platform segment, which supports the forefoot region, incorporates a cavity formed within its filled body. This cavity is configured to receive the first platform segment during telescopic collapse. The cavity dimensions correspond to the external dimensions of the first platform segment, allowing complete nesting when the footwear assumes its collapsed configuration.

The filled body of the second platform segment surrounds the cavity on multiple sides, typically on at least three sides, creating a pocket or recess within the otherwise filled structure. This design maintains structural support around the cavity while providing the necessary space for telescopic nesting. The cavity depth equals or exceeds the length of the first platform segment to enable complete insertion.

In the collapsed configuration, the first platform segment, which also comprises a filled body, inserts entirely within the cavity of the second platform segment. This nesting arrangement minimizes the collapsed footwear length to substantially equal the length of the second platform segment alone, achieving maximum compactness without compromising the structural benefits of the filled construction.

The present invention introduces a removable folded sheet that enhances the functionality of collapsible footwear. This folded sheet provides structural support while maintaining the ability to compress into a compact form.

The folded sheet is characterized by its repeating fold pattern, which enables it to transition between a folded configuration and a deployed configuration. In the folded configuration, the sheet compresses into a compact form suitable for insertion into or removal from the support structure's cavity. In the deployed configuration, the sheet expands to provide support within the collapsible sole.

The repeating fold pattern can take various forms. In one embodiment, the pattern comprises a zig-zag configuration, where the folds create a series of angular peaks and valleys. This zig-zag pattern offers efficient compression while providing stable support when deployed. In another embodiment, the pattern comprises a rhombus configuration, where the folds create diamond-shaped sections. The rhombus pattern distributes load effectively across the sheet's surface while allowing controlled compression.

The support structure that houses the folded sheet includes a cavity specifically dimensioned to receive the sheet. This support structure transitions between an extended configuration for use and a compressed configuration for storage or transport. In certain embodiments, the support structure comprises a telescopic assembly with multiple interlocking segments that slide relative to each other during compression and extension.

The folded sheet provides vertical support to the support structure when positioned within the cavity in its deployed configuration. This vertical support helps maintain the structural integrity of the collapsible sole during use, preventing unwanted compression under the user's weight while still allowing intentional compression for storage.

In some embodiments, the folded sheet comprises separate front and rear sections. The rear section has a greater width than the front section, accommodating the natural tapering of footwear from heel to toe. This multi-section design allows the sheet to conform better to the shoe's internal geometry. The front and rear sections can be separable, enabling independent replacement or customization of each section.

The cavity within the support structure may taper from its rear portion to its front portion, matching typical shoe sole geometry. This tapering enables proper fit of the folded sheet and prevents unwanted movement during use.

The folded sheet's end elements feature a half-pattern configuration of the repeating fold pattern. These half-patterns at the sheet's extremities enable proper interfacing with the cavity's end walls while maintaining the structural benefits of the fold pattern.

Material selection for the folded sheet is important for durability and function. In preferred embodiments, the sheet comprises a flexible polymeric material that withstands repeated folding cycles without permanent deformation or material fatigue. The material must balance flexibility for folding with sufficient stiffness to provide support when deployed.

The removable nature of the folded sheet offers users the option to remove the sheet for cleaning, replacement, or to use different sheets with varying support characteristics. This modularity extends the footwear's lifespan and allows customization for different activities or preferences.

The invention integrates with existing collapsible sole technologies, particularly those described in the parent application. The support structure can incorporate the lateral support elements, channels, and hinge elements of the parent application while adding the enhanced functionality of the removable folded sheet.

DEFINITIONS

The term “compact form” as referred to herein is to be construed as including any shape configured for transportation. In some embodiments the term “compact form” is

to be construed as assuming a size which is less by approximately 30 to 90 percent, relative to the size in a deployed configuration. In some embodiments the term “compact form” is to be construed as portable and particularly as manually portable. In some embodiments the term “compact form” is to be construed as having a miniature size relatively to an average and/or normal sized footwear.

The term “racetrack-shaped” as referred to herein is to be construed as including any shape including two straight parallel sides connected by semi-circular ends, such as an oval shape.

The term matching or a term similar thereto as referred to herein is to be construed as having a cross-sectional area and/or shape of a component equal or essentially similar to a cross-sectional area and/or shape of another component. It should be acknowledged that the components may only to be similar in the cross-sectional areas and/or shapes, to satisfy the term matching or similar, so long as the cross-sectional areas of the components can be mated and/or inserted into each other and/or the combination thereof essentially fits together and/or occupy essentially the same space.

The term structured as referred to herein is to be construed as including any geometrical shape, exceeding in complexity a plain linear shape or a shape embodying simple cylindrical, elliptical or polygonal contour or profile. A more complex shape, a plain linear shape or a shape embodying simple cylindrical, elliptical or polygonal contour or profile, constitutes an example of structured geometry.

The term modular, as referred to herein, should be construed as a stand-alone unit. The term modular inter alia means a standardized unit that may be conveniently installed or deployed without significant impact to the environment. The term modular, however, doesn't necessarily mean providing for ease of interchange or replacement. The term modular is optionally satisfied by providing for ease of at least onetime deployment or installation.

The term readily connectable, as referred to herein, should be construed as a standardized unit that may be conveniently connected to other components of the system.

The term readily connectable, however, doesn't necessarily mean readily disconnectable or removable. The term readily connectable is optionally satisfied by providing for ease of at least onetime connection or coupling. By operationally connected and operably coupled or similar terms used herein is meant connected in a specific way (e.g., in a manner allowing fluid to move and/or electric power to be transmitted) that allows the disclosed system and its various components to operate effectively in the manner described herein.

The terms firm rigid, or stiff, as referred to herein, are to be construed as having rigidity modulus value, otherwise referred to as the shear modulus, of 4800 MPa or more. Materials are considered to be firm rigid, or stiff but not tensile, when such materials are incapable of being efficiently elastically flexed or bent. Stiff materials, such as steel, are defined as having rigidity modulus value well exceeding 4800 MPa.

The terms pliable or pliant, as referred to herein, are to be construed as having high tensile strength and capable of being efficiently elastically flexed or bent but not being resilient and incapable of being efficiently stretched or expanded. The term tensile or tensile strength, as referred to herein, is to be construed inter alia as a shortcut of the known term ultimate tensile strength, frequently represented acronym as UTS, meaning an intensive property of a material or structure to withstand loads tending to elongate, namely to resist tension, defined as the maximum stress that a material can withstand while been stretched or pulled before sustaining breaking, substantial deformation and/or necking before fracture, such as nylon, relating to essentially non-ductile materials, having UTS value ranging between about 600 and 1000 MPa or more, but not including rigid, firm or stiff materials.

The terms elastic or resilient, as referred to herein, are to be construed as having tensile strength lower than aforesaid tensile strength of pliable or pliant material and optionally being capable of efficiently stretching or expanding, relating inter alia to essentially ductile materials, having UTS value lesser than about 600 MPa.

In the specification or claims herein, any term signifying an action or operation, such as: a verb, whether in base form or any tense, gerund or present/past participle, is not to be construed as necessarily to be actually performed but rather in a constructive manner, namely as to be performed merely optionally or potentially. As used herein, the term or is an inclusive or operator, equivalent to the term and/or, unless the context clearly dictates otherwise; whereas the term and as used herein is also the alternative operator equivalent to the term and/or, unless the context clearly dictates otherwise.

The term substantially as used herein is a broad term, and is to be given its ordinary and customary meaning to a person of ordinary skill in the art (and is not to be limited to a special or customized meaning), and refers without limitation to being largely but

not necessarily entirely of that quantity or quality which is specified. The term essentially means that the composition, method or structure may include additional ingredients, stages and or parts, but only if the additional ingredients, the stages and/or the parts do not materially alter the basic and new characteristics of the composition, method or structure claimed.

DESCRIPTION OF THE DRAWINGS

The present invention will be understood and appreciated more comprehensively from the following detailed description taken in conjunction with the appended drawings in which:

FIG. 1A is a perspective view of a collapsible sole of a collapsible footwear with at least one stopper element, according to an embodiment of the present invention;

FIG. 1B is an enlarged perspective view of a collapsible sole of a collapsible footwear with at least one stopper element, according to an embodiment of the present invention;

FIG. 1C is a perspective view of a collapsible sole in an erected configuration, according to an embodiment of the present invention;

FIG. 1D is a perspective view of a collapsible sole in a collapsed configuration, according to an embodiment of the present invention;

FIG. 1E is an enlarged perspective view of a collapsible sole in a collapsed configuration, according to an embodiment of the present invention;

FIG. 2A is a perspective view of a collapsible sole in collapsed and folded configurations, according to some embodiment of the present invention;

FIG. 2B is an enlarged perspective view of a collapsible sole in collapsed and folded configurations, according to some embodiment of the present invention;

FIG. 2C is a perspective view of a collapsible sole in a partially collapsed configuration, according to some embodiment of the present invention;

FIG. 2D is a perspective view of a collapsible sole in a partially collapsed configuration, according to some embodiment of the present invention;

FIG. 2E is a perspective view of a collapsible sole in a partially erected configuration, according to some embodiment of the present invention;

FIG. 2F is a perspective view of a collapsible sole in an erected configuration, according to some other embodiment of the present invention;

FIG. 2G is a perspective view of a stopper element in a deployed configuration, according to some embodiment of the present invention;

FIG. 2H is a perspective view of a stopper element in a collapsed configuration, according to some embodiment of the present invention;

FIG. 2I is a perspective view of a stopper element positioned for insertion into a collapsible sole, according to some embodiment of the present invention;

FIG. 2J is a perspective view of a stopper element installed within a collapsible sole, according to some embodiment of the present invention;

FIG. 3A is a perspective view of a collapsible sole in an erected configuration and a top part, according to some embodiment of the present invention;

FIG. 3B is an enlarged perspective view of a collapsible sole in an erected configuration, according to some embodiment of the present invention;

FIG. 3C is a perspective view of a collapsible sole in a partially collapsed configuration, according to some embodiment of the present invention;

FIG. 3D is an enlarged perspective view of a collapsible sole in a partially collapsed configuration, according to some embodiment of the present invention;

FIG. 3E is a perspective view of a collapsible sole in a completely collapsed configuration, according to some embodiment of the present invention;

FIG. 3F is an enlarged perspective view of a collapsible sole in a completely collapsed configuration, according to some embodiment of the present invention;

FIG. 4A is a perspective view of a collapsible sole in a completely collapsed configuration, according to some embodiment of the present invention;

FIG. 4B is a perspective view of a collapsible sole in a partially collapsed configuration, according to some embodiment of the present invention;

FIG. 4C is a perspective view of a collapsible sole in an erected configuration and a top part, according to some embodiment of the present invention;

FIG. 4D is a perspective view of a telescopic collapsible footwear in assembled configuration with a removable upper covering element attached, according to an embodiment of the present invention;

FIG. 4E is an exploded perspective view of the telescopic collapsible footwear showing the removable upper covering element separated from the telescopic platform segments, according to an embodiment of the present invention;

FIG. 4F is a perspective view of a telescopic collapsible footwear with separated upper and lower flat parts of the upper covering element, according to another embodiment of the present invention;

FIG. 4G is a perspective view showing the separated upper and lower flat parts in rolled configuration for storage, according to an embodiment of the present invention;

FIG. 4H is an exploded perspective view of a telescopic collapsible footwear with three-piece upper covering element including separate upper flat part, lower flat part, and curved midfoot portion, according to another embodiment of the present invention;

FIG. 4I is an exploded perspective view of a telescopic collapsible footwear showing filled platform segments with receiving cavity, according to an embodiment of the present invention.

FIG. 5A is a perspective view of a collapsible sole in a collapsed configuration, according to some embodiment of the present invention;

FIG. 5B is a perspective view of a collapsible sole in an erected configuration, according to some embodiment of the present invention;

FIG. 6 is a perspective view of a collapsible sole in an erected configuration, according to some embodiment of the present invention;

FIG. 7 is a flowchart of a method of altering a configuration of a collapsible footwear into a compact form, configured for transportation, according to another embodiment of the present invention;

FIG. 8A is a perspective view of a removable folded sheet in a folded configuration showing a rhombus fold pattern, according to another embodiment of the present invention;

FIG. 8B is a perspective view of a removable folded sheet in a deployed configuration with separated front and rear sections showing a rhombus fold pattern, according to the embodiment of FIG. 8A;

FIG. 8C is a perspective view of the removable folded sheet of FIGS. 8A-8B installed within a cavity of a support structure, according to the embodiment of the present invention;

FIG. 8D is a perspective view of a removable folded sheet in a folded configuration showing a zig-zag fold pattern, according to another embodiment of the present invention;

FIG. 8E is a perspective view of the removable folded sheet in a deployed configuration showing the zig-zag fold pattern with angular peaks and valleys, according to the embodiment of FIG. 8D;

FIG. 8F is a perspective view of the removable folded sheet of FIGS. 8D-8E installed within a cavity of a support structure, according to the embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown merely by way of example in the drawings. The drawings are not necessarily complete and components are not essentially to scale; emphasis instead being placed upon clearly illustrating the principles underlying the present invention.

DETAILED DISCLOSURE OF EMBODIMENTS

Illustrative embodiments of the invention are described below. In the interest of clarity, not all features of actual implementation are described in this specification. It should be appreciated that various features or elements described in the context of some embodiment may be interchangeable with features or elements of any other embodiment described in the specification. Moreover, it will be appreciated that for the development of any actual embodiment, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with technology- or business related constraints, which may vary from one implementation to another, and the effort of such a development might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure. In accordance with some preferred embodiments of the present invention, reference is now made to FIG. 1A to 1E, showing collapsible sole 10 of a collapsible footwear, configured for transportation in a compact and/or portable form. The collapsible sole of the embodiment of FIG. 1A to 1E illustrates various features that may be interchangeable with elements of any other embodiment described in the specification.

In some embodiments, collapsible sole 10 comprises top sheet 12. Top sheet 12 extends essentially across entire surface area of collapsible sole 10. Top sheet 12 typically comprises a pliable or pliant polymeric material.

In some embodiments, collapsible sole 10 further comprises bottom sheet 14. Bottom sheet 14 extends essentially across entire surface area of collapsible sole 10. Bottom sheet 14 typically comprises a pliable or pliant polymeric material. In some embodiments, collapsible sole 10 further comprises plurality of lateral support elements 16. Support elements 16 extend in-between top sheet 12 and bottom sheet 14. In some embodiments, the plurality of lateral support elements 16 extend essentially along an entire width of collapsible sole 10. Support elements 16 typically comprise a pliable or pliant polymeric material.

In some embodiments, collapsible sole 10 further comprises a plurality of laterally extending channels 18. The plurality of laterally extending channels 18 are formed in-between lateral support elements 16 and in-between top sheet 12 and bottom sheet 14. In some embodiments, collapsible sole 10 further comprises plurality of top hinge elements 20. Top hinge elements 20 operationally connect top sheet 12 with the plurality of respective lateral support elements 16 of collapsible sole 10. In some embodiments, top hinge elements 20 are configured to sustain angular bending and/or partial rotation of respective lateral support elements 16 relative to top sheet 12. Top hinge elements 20 are typically manufactured by a polymeric welding and/or thermoplastic molding.

In some embodiments, collapsible sole 10 further comprises plurality of bottom hinge elements 22. Bottom hinge elements 22 operationally connect bottom sheet 14 with a plurality of respective lateral support elements 16 of collapsible sole 10. In some embodiments, bottom hinge elements 22 are configured to sustain angular bending and/or partial rotation of respective lateral support elements 16 relative to bottom sheet 14. Bottom hinge elements 22 are typically manufactured by a polymeric welding and/or thermoplastic molding.

In some embodiments, collapsible sole 10 further comprises at least one stopper element 24. At least one stopper element 24 typically comprises a rigid material. At least one stopper element 24 is disposable between top sheet 12 and bottom sheet 14. In some examples, at least one stopper element 24 embodies shape of rectangular profile. In some embodiments, at least one stopper element 24 embodies a shape congruent to at least one of laterally extending channel 18. In some embodiments, at least one stopper element 24 is insertable within at least one of laterally extending channel 18 and retrievable from at least one laterally extending channel 18.

In some embodiments, collapsible sole 10 is characterized by reversibly assuming a collapsed configuration shown in FIGS. 1D and 1E. Collapsible sole 10 is shown in FIGS. 1D and 1E in a collapsed configuration. In the collapsed configuration of FIGS. 1D and 1E, laterally extending channels 18 are essentially collapsed, thereby forming an acute angle between lateral support elements 16 and top sheet 12 and bottom sheet 14, thereby allowing top sheet 12 to be brought into the proximity relative to bottom sheet 14.

In some embodiments, collapsible sole 10 is characterized by reversibly assuming an erected configuration shown in FIG. 1A to 1C. Collapsible sole 10 is shown in FIG. 1A to 1C in an erected configuration. In some embodiments, in erected configuration, lateral support elements are disposed essentially perpendicularly to top sheet 12 and bottom sheet 14, thereby rendering the former spaced apart from the latter parallel. In some embodiments, in erected configuration, at least one stopper element 24 stabilizes laterally extending channels 18 in an open conformation, whilst top sheet 12 is spaced from bottom sheet 14. In some embodiments, collapsible sole 10 further comprises at least one top part. An exemplary top part 210 is shown in FIG. 4C. In some examples, the top part is collapsible, whereas in other examples the top part is a modular and/or removable top part. In some embodiments, the top part further comprises a plurality of connecting elements. The connecting elements of the top part, such as connecting elements 212 of top part 210 is shown in FIG. 4C, are configured for readily connecting collapsible sole 10 with the top part. In some embodiments, collapsible sole 10 further comprises a plurality of connecting elements. The connecting elements, such as connecting elements 214 of collapsible sole 200 is shown in FIG. 4C, are configured for readily connecting collapsible sole 10 with least the top part.

In some embodiments, in the collapsed configuration, plurality of laterally extending channels 18 of collapsible sole 10 are collapsed along a vertical axis and across a vertical plane of collapsible sole 10. In some embodiments, in the collapsed configuration, collapsible sole 10 maintains an essentially planar shape and substantially constant lengths along the longitudinal axis and across a horizontal plane of collapsible sole 10, perpendicular to the vertical plane. In some embodiments, the in collapsed configuration collapsible sole 10 maintains an essentially constant width along the transversal axis and across a horizontal plane of collapsible sole 10, perpendicular to the vertical plane.

In accordance with some preferred embodiments of the present invention, reference is now made to FIG. 2A to 2F, showing another embodiment of collapsible sole 50. The collapsible sole of the embodiment of FIG. 2A to 2F illustrates various features that may be interchangeable with elements of any other embodiment described in the specification. In some embodiments, collapsible sole 50 comprises top sheet 52. Top sheet 52 extends essentially across entire surface area of collapsible sole 50. Top sheet 52 typically comprises a pliable or pliant polymeric material. In some embodiments, top sheet 52 comprises frontal portion 52A and rear portion 52B. In some embodiments, collapsible sole 50 further comprises bottom sheet 54. Bottom sheet 54 extends essentially across the entire surface area of collapsible sole 50. In some embodiments, bottom sheet 54 comprises frontal portion 54A and rear portion 54B.

In some embodiments, collapsible sole 50 further comprises a plurality of lateral support elements 56. In some embodiments, lateral support elements 56 extend in between top sheet 52 and bottom sheet 54. In some embodiments, lateral support elements 56 extend essentially along an entire width of collapsible sole 50. Support elements 56 typically comprise a pliable or pliant polymeric material.

In some embodiments, collapsible sole 50 further comprises plurality of laterally extending channels 58. Laterally extending channels 58 are formed in-between lateral support elements 56 and in-between top sheet 52 and bottom sheet 54.

In some embodiments, collapsible sole 50 further comprises plurality of top hinge elements 60. Top hinge elements 60 operationally connecting top sheet 52 with the respective lateral support elements 56 of collapsible sole 50. Top hinge elements 60 are typically manufactured by a polymeric welding and/or thermoplastic molding. In some embodiments, top hinge elements 60 are configured to sustain angular bending and/or partial rotation of respective lateral support elements 56 relative to top sheet 52.

In some embodiments, collapsible sole 50 further comprises plurality of bottom hinge elements 62. Plurality of bottom hinge elements 62 operationally connecting bottom sheet 54 and plurality of lateral support elements 56 of collapsible sole 50. In some embodiments, plurality of bottom hinge elements 62 are configured to sustain angular bending and/or partial rotation of respective lateral support elements 56 relative to bottom sheet 54. Bottom hinge elements 62 are typically manufactured by a polymeric welding and/or thermoplastic molding. In some embodiments, collapsible sole 50 further comprises at least one stopper element 64. At least one stopper element 64 typically comprises a rigid material. At least one stopper element 64 is disposable between top sheet 52 and bottom sheet 54. In some examples, at least one stopper element 64 embodies an elongated trapezoid shape. In some embodiments, collapsible sole 50 further comprises centrical potion 68. In some embodiments, at least one stopper element 64 at centrical portion 68 of collapsible sole 50. In some embodiments, collapsible sole 50 is characterized by reversibly assuming a collapsed configuration, shown in FIGS. 2A and 2B, as well as an erected configuration, shown in FIG. 2F. In some embodiments, collapsible sole 50 assumes a collapsed configuration, shown in FIGS. 2A and 2B, in which laterally extending channels 58 are essentially collapsed, thereby forming an acute angle between plurality of lateral support elements 56 and top sheet 52 and bottom sheet 54, as well as bringing top sheet 52 into proximity with bottom sheet 54. In some embodiments, collapsible sole 50 assumes an erected configuration, shown in FIG. 2F. In some embodiments, at least one stopper element 64 stabilizes laterally extending channels 58 in an open conformation, whereas top sheet 52 is spaced from bottom sheet 54.

In some embodiments, collapsible sole 50 further comprises at least one top pat. In some examples, the top part is a collapsible top part whereas in other examples the top part is a removable top part. In some embodiments, the top part further comprises a plurality of connecting elements. The connecting elements are configured for readily connecting collapsible sole 50 with the top part. In some embodiments, centrical portion 68 of collapsible sole 50 accommodates a mechanism rendering collapsible sole 50 configured to further assume a folded configuration and an unfolded configuration. In some embodiments, in a folded configuration, bottom sheet 54 of collapsible sole 50 is folded about centrical portion 68, so that frontal portion 54A of bottom sheet 54 is disposed adjacently to rear portion 54B of bottom sheet 54. In some embodiments, in a folded configuration, posterior top hinge elements 70A and 70B are spaced apart from top portion 72 of trapezoid shape 66. In some embodiments, in an unfolded configuration, bottom sheet 54 of collapsible sole 50 is straightened into an essentially planar shape, so that frontal portion 54A of bottom sheet 54 forms an approximately straight angle relative to rear portion 54B of bottom sheet 54. In some embodiments, in a folded configuration, posterior top hinge elements 70A and 70B are adjoined to top portion 72 of trapezoid shape 66, of stopper element 64. In some embodiments, in the collapsed configuration, plurality of laterally extending channels 58 of collapsible sole 50 are collapsed along a vertical axis and across a vertical plane of collapsible sole 50. In some embodiments, in the collapsed configuration, collapsible sole 50 maintains an essentially planar shape and substantially constant lengths along the longitudinal axis and across a horizontal plane of collapsible sole 50, perpendicular to the vertical plane. In some embodiments, the in collapsed configuration collapsible sole 50 maintains an essentially constant width along the transversal axis and across a horizontal plane of collapsible sole 50, perpendicular to the vertical plane.

Reference is now made to FIGS. 2G to 2J showing various embodiments of a stopper element 1400 for collapsible footwear. The stopper element 1400 is designed for insertion into lateral channels 18 of a collapsible sole 10 as previously described.

The stopper element 1400 comprises a central structure 1402 from which at least two arms 1404 extend. As shown in the drawings, the illustrated embodiment includes four arms 1404a, 1404b, 1404c, 1404d extending from the central structure 1402. Each arm 1404 has a proximal end 1406 and a distal end 1408. The proximal end 1406 of each arm 1404 is pivotally connected to the central structure 1402 through a pivotal connection 1410.

The pivotal connection 1410 enables each arm 1404 to rotate between a collapsed configuration, shown in FIG. 2H, and a deployed configuration, shown in FIG. 2G. In the collapsed configuration, the arms 1404a, 1404b, 1404c, 1404d are arranged substantially parallel to each other, creating a compact linear profile. In the deployed configuration, the four arms 1404a, 1404b, 1404c, 1404d extend radially outward from the central structure 1402 at substantially 90-degree intervals.

The central structure 1402 comprises an elongated body 1412 that extends along a longitudinal axis 1414. The elongated body 1412 is configured for resilient deformation under compressive load, allowing it to function as a cushioning element during use. While the specific material properties that enable this resilient deformation are not shown in the drawings, the elongated nature of the central structure 1402 facilitates controlled bending along its length.

Each arm 1404 includes a tapered portion 1416 at its distal end 1408. The tapered portion 1416 defines a flat abutment surface 1418 configured to contact an inner surface of the lateral channel 18 when the arm 1404 is in the deployed configuration. As visible in the drawings, the tapered portion 1416 defines both an upper flat abutment surface 1418a and a lower flat abutment surface 1418b. These surfaces are positioned to contact the top inner surface and bottom inner surface of the lateral channel 18 respectively.

In the illustrated four-arm embodiment, the collapsed configuration shows a specific folding arrangement. A first pair of arms 1404a, 1404b is folded in a first direction while a second pair of arms 1404c, 1404d is folded in a second direction opposite to the first direction. This arrangement creates the compact profile visible in FIG. 2H.

The pivotal connection 1410 may be implemented as a living hinge (not shown in detail) integrally formed between each arm 1404 and the central structure 1402, or alternatively as a mechanical hinge (not shown). The specific implementation of the pivotal connection 1410 is not detailed in the drawings but enables the rotation between configurations.

While not explicitly shown in the drawings, each arm 1404 has a rigidity greater than the rigidity of the central structure 1402. This differential rigidity allows the arms 1404 to maintain structural integrity while the central structure 1402 provides cushioning through elastic deformation.

The dimensional relationships between the collapsed and deployed configurations are evident from the drawings. In the collapsed configuration shown in FIG. 2H, the maximum cross-sectional dimension of the stopper element 1400 is substantially reduced compared to the deployed configuration shown in FIG. 2G. Specifically, the maximum cross-sectional dimension in the collapsed configuration is less than 50% of the maximum cross-sectional dimension in the deployed configuration.

FIG. 2I shows the stopper element 1400 positioned for insertion into a collapsible sole 10. The collapsible sole 10 includes a top sheet 12, a bottom sheet 14, and a plurality of lateral support elements 16 extending between the top sheet 12 and bottom sheet 14. The laterally extending channels 18 are formed between adjacent lateral support elements 16. The stopper element 1400 is shown in its collapsed configuration, ready for insertion into one of the channels 18.

FIG. 2J illustrates the stopper element 1400 after installation within the collapsible sole 10. The stopper element 1400 is disposed within at least one of the laterally extending channels 18, with the arms 1404 in their deployed configuration. In this state, the flat abutment surfaces 1418 of the arms 1404 engage the inner surfaces of the channel 18, preventing collapse of the sole structure.

During use of the collapsible footwear, compressive forces applied to the top sheet 12 are transmitted through the upper flat abutment surfaces 1418a to the arms 1404. These forces travel through the rigid arms 1404 to the central structure 1402, which undergoes resilient deformation to provide cushioning. The forces are then transmitted through the lower arms to the lower flat abutment surfaces 1418b and ultimately to the bottom sheet 14.

The stopper element 1400 maintains the erected configuration of the collapsible sole 10 by preventing the lateral support elements 16 from collapsing. The multi-directional support provided by the four arms 1404a, 1404b, 1404c, 1404d enables stability regardless of the direction of applied load during various phases of walking or standing.

In accordance with some preferred embodiments of the present invention, reference is now made to FIG. 3A to 3F showing another embodiment of collapsible sole 100. The collapsible sole of the embodiment of FIG. 3A to 3F illustrates various features that may be interchangeable with elements of any other embodiment described in the specification. In some embodiments, collapsible sole 100 comprises top sheet 102. Top sheet 102 extends essentially across entire surface area of collapsible sole 100. In some embodiments, collapsible sole 100 further comprises bottom sheet 104. Bottom sheet 104 extends essentially across entire surface area of collapsible sole 100. Top sheet 102 and bottom sheet 104 typically comprise a pliable or pliant polymeric material.

In some embodiments, collapsible sole 100 further comprises a plurality of lateral support elements 106. Lateral support elements 106 extend between top sheet 102 and bottom sheet 104. In some embodiments, Lateral support elements 106 extend essentially along an entire width of collapsible sole 100. In some embodiments, collapsible sole 100 further comprises a plurality of laterally extending channels 108. Laterally extending channels 108 are formed in-between lateral support elements 106 and in-between top sheet 102 and bottom sheet 104. In some embodiments, collapsible sole 100 further comprises a plurality of top hinge elements 110. Top hinge elements 110 operationally connect top sheet 102 to respective lateral support elements 106 of collapsible sole 100. In some embodiments, plurality of top hinge elements 110 are configured to sustain angular bending and/or partial rotation of respective lateral support elements 106 relative to top sheet 102. In some embodiments, collapsible sole 100 further comprises a plurality of bottom hinge elements 112. Plurality of bottom hinge elements 112 operationally connect bottom sheet 104 to respective lateral support elements 106 of collapsible sole 100. In some embodiments, bottom hinge elements 112 are configured to sustain angular bending and/or partial rotation of respective lateral support elements 106 relative to bottom sheet 104.

In some embodiments, collapsible sole 100 further comprises at least one stopper element 114. At least one stopper element 114 is disposable between top sheet 102 and bottom sheet 114. At least one stopper element 114 comprises an essentially linear shape 66. In some preferred embodiments, each one of laterally extending channels 108 accommodates an individual stopper element 114. In some preferred embodiments, each one stopper elements 114 extend along an entire width of collapsible sole 100. In some preferred embodiments, some stopper elements 114 comprise top stopper hinge portion 116 forming a connection with top sheet 112 of collapsible sole 100, whereas other stopper elements 114 comprise bottom stopper hinge portion 118 forming a connection with bottom sheet 114. In some embodiments, stopper elements 114 are accommodated with laterally extending channels 108 and connected to top sheet 102 of collapsible sheet 100 by top stopper hinge portions 116. In some embodiments, stopper element 114 are accommodated within other laterally extending channels 108 and connected to bottom sheet 104 of collapsible sheet 100 by bottom stopper hinge portions 118.

In some embodiments, collapsible sole 100 comprises a composite material and/or structure, in which top sheet 102 and bottom sheet 104 comprise a pliant and/or flexible material, such as synthetic woven fabric, whereas lateral support elements 106 and/or stopper elements 114 comprise firm and/or rigid material, such as rigid polymeric

plates and/or segments, which are enclosed within and/or fused with a pliant and/or flexible material, such as synthetic woven fabric, thereby conferring exceptional foldability to top hinge elements 110 and bottom hinge elements 112, whilst concomitantly conferring superb firmness to lateral support elements 106 and/or stopper elements 114. In some embodiments, collapsible sole 100 comprises an assembly and/or construct of pars, in which top sheet 102 and bottom sheet 104 comprise a pliant and/or flexible material, such as synthetic woven fabric, whereas additionally corresponding pouches are formed from a pliant and/or flexible material, such as synthetic woven fabric for lateral support elements 106 and/or stopper elements 114. In such embodiments, lateral support elements 106 and/or stopper elements 114 comprise firm and/or rigid material, such as, rigid polymeric and/or even metallic plates, which are insertable into and or retrievable from within the aforementioned corresponding pouches that are formed from a pliant and/or flexible material, thereby conferring exceptional foldability to top hinge elements 110 and bottom hinge elements 112, whilst concomitantly conferring superb firmness to lateral support elements 106 and/or stopper elements 114.

It should be acknowledged that the implementation of the novel and innovative shape and/or composite material and/or structure and/or assembly and/or construct of pars, of collapsible sole 100, as well as the implementations of the shape and/or composite material and/or structure and/or assembly and/or construct of pars of any other collapsible sole described in this specification hereinabove and/or hereunder, as a collapsible sole for collapsible footwear is merely exemplary and is not limited to collapsible soles or collapsible footwear. Whereas, the implementation of the novel and innovative shape and/or composite material and/or structure and/or assembly and/or construct of pars, of collapsible sole 100, as well as the implementations of the shape and/or composite material and/or structure and/or assembly and/or construct of pars of any other collapsible sole described in this specification hereinabove and/or hereunder, equally include numerous implementations embodying various other products, such as collapsible sheeting of indefinite lengths and/or widths and/or surface area and/or height and/or thickness, which are expediently applicable and implementable in a vast variety of products, in a non-limiting manner including: collapsible matting, collapsible rugs, collapsible carpet, collapsible thermally insulating sheeting or any product for that matter.

In some embodiments, collapsible sole 100 is characterized by reversibly assuming a collapsed configuration and an erected configuration. In some embodiments, in a collapsed configuration, shown in FIGS. 3E and 3F, lateral support elements 106 form an approximately straight angle with adjacent lateral support elements 106. In some embodiments, in an erected configuration, stopper elements 114 connected to top sheet 102 are driven downwardly and/or brought to bottom sheet 104. In some embodiments, in an erected configuration, stopper elements 114 connected to bottom sheet 104 are driven upwardly and/or brought to top sheet 102. to be spaced from bottom sheet 104.

In some embodiments, in a collapsed configuration, shown in FIGS. 3E and 3F, top sheet 102 of collapsible sole 100 assumes a corrugated shape. In some embodiments, in a collapsed configuration, top sheet 102 is folded about top stopper hinge portions 116, forming an approximately acute angle first portions 120 of top sheet 102 and second portions 122 of top sheet 102. In some embodiments, in a collapsed configuration, top sheet 102 is folded about top stopper hinge portions 116, so that first portions 120 of top sheet 102 and second portions 122 of top sheet 102 are disposed essentially adjointly to stopper elements 114. In some embodiments, in a collapsed configuration, first portions 120 of top sheet 102 and second portions 122 of top sheet 102 are folded about top stopper hinge portions 116, so that first portions 120 and second portions 122 of top sheet 102 form an approximately acute angle relative to stopper elements 114.

In some embodiments, in a collapsed configuration, bottom sheet 104 of collapsible sole 100 assumes a corrugated shape. In some embodiments, in a collapsed configuration, bottom sheet 104 is folded about bottom stopper hinge portions 118, forming an approximately acute angle first portions 124 of bottom sheet 102 and second portions 126 of bottom sheet 104. In some embodiments, in a collapsed configuration, bottom sheet 104 is folded about bottom stopper hinge portions 118, so that first portions 124 of bottom sheet 104 and second portions 126 of bottom sheet 104 are disposed essentially adjointly to stopper elements 114. In some embodiments, in a collapsed configuration, first portions 124 of bottom sheet 104 and second portions 126 of bottom sheet 104 are folded about bottom stopper hinge portions 118, so that first portions 124 and second portions 126 of bottom sheet 104 form an approximately acute angle relative to stopper elements 114.

In some embodiments, collapsible sole 100 assumes an erected configuration. In an erected configuration, shown in FIGS. 3A and 3B, at least one stopper element 114 stabilizes laterally extending channels 108 in an open conformation. In an erected configuration, shown in FIGS. 3A and 3B, top sheet 52 and bottom sheet 104 assume a straight and/or planar form. In some embodiments, collapsible sole 100 further comprises at least one top pat 128. In some examples, at least one top part 128 is a collapsible top part and/or a removable top part. In some embodiments, top part 128 further comprises plurality of connecting elements 130. Connecting elements 130 are configured for readily connecting collapsible sole 100 with top part 128 and readily disconnecting collapsible sole 100 from top part 128. Each of connecting elements 130 of top part 128 is connectable to a corresponding connecting element, such as securing aperture 132, of collapsible sole 100, thereby securing top part 128 with collapsible sole 100.

In some embodiments, in the collapsed configuration, plurality of laterally extending channels 108 of collapsible sole 100 are collapsed along a longitudinal axis and across a horizontal plane of collapsible sole 100. In some embodiments, in the collapsed configuration, plurality of laterally extending channels 108 of collapsible sole 100 are collapsed along a vertical axis and across a vertical plane of collapsible sole 100. In some embodiments, in the collapsed configuration, collapsible sole 100 assumes an essentially corrugated shape and maintains substantially constant width along the transversal axis of the horizontal plane of collapsible sole 10. In accordance with some preferred embodiments of the present invention, reference is now to FIG. 4A to 4C showing yet another embodiment of collapsible sole 200 of a collapsible footwear. The collapsible sole of the embodiment of FIG. 4A to 4C illustrates various features that may be interchangeable with elements of any other embodiment described in the specification. In some embodiments, collapsible sole 200 comprises top side 202. Top side 202 faces upwardly, relative to collapsible sole 200. In some embodiments, collapsible sole 200 further comprises bottom side 204. Bottom side 204 faces downwardly, relative to collapsible sole 200.

In some embodiments, collapsible sole 200 embodies a telescopic assembly. The telescopic assembly of collapsible sole 200 comprises a plurality of structural segments 206. The exterior contour of structural segments 206 is optionally racetrack-shaped and foot-like shaped. In some embodiments, each one of plurality of structural segments 206 comprises anterior portion 208 and posterior portion 210. In some embodiments, each one of plurality of structural segments 206 of collapsible sole 200 further comprises a longitudinally extending channel or interior lumen. The longitudinally extending channel of each one of plurality of structural segments 206 is formed in-between anterior portion 208 and posterior portion 210 and in-between top side 202 and side sheet 204. In some embodiments, collapsible sole 200 is characterized by reversibly assuming a collapsed configuration and an erected configuration. In some embodiments, in a collapsed configuration, shown in FIG. 4A, anterior portions 208 of structural segments 206 are disposed adjacently to each other, whereas posterior portion 210 are disposed adjacently to each other, whilst structural segments 206 are telescoped and accommodated within adjacent sections 206. For instance, in a collapsed configuration, shown in FIG. 4A, posterior portion 210 of first structural segment 206 is adjacent to posterior portion 210 of adjacent structural segment 206, whereas anterior portion 208 of first structural segment 206 is adjacent to anterior portion 208 of adjacent structural segment 208.

In an erected configuration, shown in FIG. 4A, the plurality of structural segments 206 are spaced apart from each other, so that posterior portion 210 of structural segment 206 is spaced apart from posterior portion 210 of adjacent structural segment 206, whereas anterior portion 208 of structural segment 206 is spaced apart from anterior portion 208 of adjacent structural segment 208. In some examples, collapsible sole 200 comprises five structural segments 206A, 206B, 206C, 206D and 206E. In a collapsed configuration, first structural segment 206A telescopes within the laterally extending channel of second structural segment 206B. Similarly, second structural segment 206B telescopes within the laterally extending channel of third structural segment 206C. Second structural segment 206C telescopes within the laterally extending channel of forth structural segment 206D, which is in turn telescoped within the laterally extending channel of fifth structural segment 206E. In some embodiments, collapsible sole 200 further comprises top pat 210. In some examples, top part 210 is a removable top part. In some embodiments, top part 210 further comprises a plurality of connecting elements 212. Connecting elements 212 are configured for readily connecting collapsible sole 200 with top part 210 and readily disconnecting collapsible sole 200 from top part 210. Each of connecting elements of top part 210 is connectable to a corresponding connecting element, such as securing aperture 214, of collapsible sole 200, thereby securing top part 210 with collapsible sole 200. Reference is now made to FIGS. 4D to 4I showing various embodiments of telescopic collapsible footwear with removable upper covering elements according to the present invention.

As shown in FIG. 4D, the collapsible footwear comprises a telescopic sole assembly with first platform segment 202 supporting the heel region and second platform segment 204 supporting the forefoot region. A removable upper covering element 1210 is attached to the platform segments in the assembled configuration. The upper covering element 1210 comprises an upper flat part, a lower flat part, and a curved portion connecting these flat parts at the front end. An elevated midfoot support portion 1211 extends upwardly from the upper flat part, positioned to secure the foot at the instep area. The curved front portion creates a toe box while leaving the heel area open for easy foot entry.

FIG. 4E shows an exploded view with the upper covering element 1210 separated from the platform segments 202, 204. Attachment apertures 1214 in the platform segments align with securing points 1212 on the covering element.

FIG. 4F shows an alternative embodiment where the upper covering element comprises separate, disconnected upper and lower flat parts 1210a and 1210b. These components can be attached independently to the platform segments, allowing greater modularity. FIG. 4G demonstrates the storage configuration of these separated components, with both the upper flat part 1210a and lower flat part 1210b shown in rolled/scrolled configurations. This separated design enables more compact storage and independent replacement of worn components.

FIG. 4H presents an exploded view of a further embodiment where the upper covering comprises three separate components: upper flat part 1210a, lower flat part 1210b, and curved midfoot portion 1210c. This three-piece design supports modularity by allowing independent selection of materials and styles for each component.

FIG. 4I shows an exploded view highlighting the internal construction of the telescopic platform segments. Cross-hatching indicates filled body construction in both platform segments 202, 204. The first platform segment 202 is entirely filled, while the second platform segment 204 comprises a filled body with a cavity 1218 formed therein. The cavity 1218 is specifically sized to receive the entire first platform segment 202 during telescopic collapse. This design achieves compactness while maintaining structural integrity through the filled construction. The filled bodies may comprise materials engineered for comfort and bounciness characteristics.

Throughout these embodiments, the telescopic sole assembly enables transition between extended and collapsed configurations through relative movement of platform segments 202, 204. The removable upper covering elements, whether single-piece or multi-piece, attach via the alignment of apertures 1214 with securing points 1212. The modular design philosophy evident in FIGS. 4D-4I allows users to customize their footwear through different upper configurations while maintaining the same telescopic sole base. The progression from connected upper to separated components to three-piece construction demonstrates increasing modularity options.

The filled platform construction shown in FIG. 4I addresses structural and comfort requirements while enabling the compact telescopic action through the cavity and insert design. This construction method can be implemented with any of the upper covering configurations shown in the other figures. In accordance with some preferred embodiments of the present invention, reference is now made to FIG. 5A to 6, showing still another embodiment of the invention, showing collapsible sole 300 of a collapsible footwear. The collapsible sole of the embodiment of FIG. 5A and SC illustrates various features that may be interchangeable with elements of any other embodiment described in the specification. In some embodiments, collapsible sole 300 comprises top sheet 302 and bottom sheet 304. In some embodiments, top sheet 302 and bottom sheet 304 of collapsible sole 300 are configured for reversibly assuming a corrugated shape. In some embodiments, exterior surface 306 and interior surface 308 of collapsible sole 300 further comprise a plurality of corrugations, including interior folds 310 and exterior folds 312. Interior folds 306 are connected to exterior folds 312 by a plurality of lateral elements 314. In some embodiments, collapsible sole 200 further comprises longitudinally extending channel 316. Longitudinally extending channel 316 extends along an entire length of collapsible sole 300. Longitudinally extending channel 316 of collapsible sole 300 is formed in-between anterior portion 318 and posterior portion 320 of collapsible sole 200 and in-between top sheet 302 and bottom sheet 304 of collapsible sole 200. In some embodiments, collapsible sole 300 further comprises at least one stopper element 322, shown in FIG. 6. At least one stopper element 322 is disposable between top sheet 302 and bottom sheet 304. In some examples, at least one stopper element 322 embodies the shape of extendible telescopic cylindrical assembly. In some embodiments, at least one stopper element 322 is insertable into longitudinally extending channel 316 of collapsible sole 300. In some embodiments, collapsible sole 300 is characterized by reversibly assuming a collapsed configuration and an erected configuration. In some embodiments, in an erected configuration, at least one stopper element 322 inserted into longitudinally extending channel 316 and stabilizes collapsible sole 300 in an open conformation, so that top sheet 302 and bottom sheet 304 assume an essentially straight and/or planar shape. In some embodiments, in an erected configuration, the angle formed between interior folds 310 to exterior folds 312 is an essentially straight angle.

In some embodiments, in a collapsed configuration, longitudinally extending channel 316 is collapsed, so that lateral support elements 314 are adjacent disposed adjointly one to another. In some embodiments, in a collapsed configuration, the angle formed between interior folds 310 to exterior folds 312 is an essentially acute angle.

In some embodiments, collapsible sole 200 further comprises top pat 324. In some examples, top part 324 is a removable top part. In some embodiments, top part 324 further comprises a plurality of connecting elements 326. In some embodiments, connecting elements 326 are configured for readily connecting collapsible sole 300 with top part 324 and readily disconnecting collapsible sole 300 from top part 324. Each of connecting elements of top part 324 is connectable to a corresponding connecting element, such as securing aperture 328, of collapsible sole 300, thereby facilitating the reversibly securing of top part 324 to collapsible sole 300.

Reference is now made to FIGS. 8A to 8F showing various embodiments of a removable folded sheet for use with collapsible footwear. The removable folded sheet of the embodiments of FIGS. 8A to 8F illustrates various features that may be interchangeable with elements of any other embodiment described in the specification.

In accordance with some preferred embodiments of the present invention, reference is now made to FIGS. 8A and 8D showing folded sheets 1600 and 1602 respectively in a folded configuration. FIGS. 8A and 8D show different embodiments of folded sheets from different viewing angles. In the folded configuration, folded sheets 1600 and 1602 are compressed into a compact form suitable for insertion into or removal from a cavity 1606 of a support structure 1608.

Folded sheet 1600 comprises a repeating fold pattern. In some embodiments, as shown in FIG. 8B, the repeating fold pattern comprises a rhombus pattern. The rhombus pattern forms diamond-shaped sections 1622 when folded sheet 1600 is in a deployed configuration. In other embodiments, as shown in FIGS. 8D and 8E, folded sheet 1602 comprises a repeating fold pattern in a zig-zag configuration. The zig-zag pattern creates a series of angular peaks 1614 and valleys 1616 when folded sheet 1602 is in a deployed configuration.

As shown in FIGS. 8B and 8E, folded sheets 1600 and 1602 include end elements 1624 and 1626 respectively, having a half-pattern configuration of their respective repeating fold patterns. In the rhombus pattern embodiment of FIG. 8B, end elements 1624 comprise half-rhombus shapes. In the zig-zag pattern embodiment of FIG. 8E, end elements 1626 comprise partial peaks or valleys.

In some embodiments, as particularly shown in FIG. 8B, folded sheet 1600 comprises a front section 1632 and a rear section 1634. Rear section 1634 has a greater width than front section 1632. This width differential accommodates the natural tapering of footwear from heel to toe. In the embodiment of FIG. 8B, front section 1632 is shown separated from rear section 1634, illustrating that these sections can be separable components.

Reference is now made to FIGS. 8C and 8F showing folded sheets 1600 and 1602 positioned within cavity 1606 of support structure 1608. In some embodiments, support structure 1608 comprises a telescopic assembly having a plurality of interlocking segments 1638. The telescopic assembly is configured to transition between an extended configuration and a compressed configuration.

Cavity 1606 is defined within support structure 1608 and is dimensioned to receive folded sheets 1600 or 1602. In some embodiments, cavity 1606 tapers from a rear portion 1642 to a front portion 1644, accommodating typical shoe sole geometry. When folded sheet 1600 or 1602 is positioned within cavity 1606 in a deployed configuration, it provides vertical support to support structure 1608.

FIG. 8C shows rhombus pattern folded sheet 1600 installed within cavity 1606, while FIG. 8F shows zig-zag pattern folded sheet 1602 installed within cavity 1606. In both configurations, folded sheets 1600 and 1602 expand to fill cavity 1606 and provide structural support while maintaining the ability to compress when support structure 1608 transitions to its compressed configuration.

In some embodiments, folded sheets 1600 and 1602 comprise a flexible polymeric material. The material selection enables repeated transitions between folded and deployed configurations without permanent deformation.

The removable nature of folded sheets 1600 and 1602 is illustrated by comparing FIGS. 8A-8B and 8D-8E (showing folded sheets 1600 and 1602 before insertion) with FIGS. 8C and 8F (showing folded sheets 1600 and 1602 after insertion into cavity 1606). This removability allows users to clean, replace, or interchange different folded sheets having different support characteristics.

In some embodiments, support structure 1608 further comprises the collapsible sole elements described in the parent application, including lateral support elements, channels, and hinge elements that work in conjunction with the removable folded sheet system.

In accordance with some embodiments of the present invention, reference is now made FIG. 7 showing flowchart of method 400 of altering a configuration of a collapsible footwear into a compact form, configured for transportation. The method of the embodiment of FIG. 7 illustrates various features that may be interchangeable with elements of any other embodiment described in the specification. In some embodiments, method 400 commences at step 402 of providing a collapsible sole. In some embodiments, the collapsible sole comprises a top sheet, extending essentially across entire surface area of the sole and a bottom sheet, extending essentially across entire surface area of the sole. In some embodiments, the collapsible sole comprises further comprises a plurality of lateral support elements, extending in-between the top sheet and the bottom sheet, in which the lateral support elements extend essentially along an entire width of the sole.

In some embodiments, the collapsible sole further comprises a plurality of laterally extending channels formed in-between the lateral support elements and in-between the top and bottom sheets. In some embodiments, the collapsible sole further comprises a plurality of top and bottom hinge elements operationally connecting the top and bottom sheet to the respective of lateral support elements of the collapsible sole, in which the top and bottom hinge elements are configured to sustain a partial rotation of the plurality of lateral support elements relative to the top and bottom sheet. In some embodiments, the collapsible sole further comprises at least one stopper element disposable between the upper sheet and the bottom sheet.

In some embodiments, the collapsible sole is essentially similar to collapsible soles 10, 50, 100, 200 and/or 300, shown in FIG. 1A to 6 and described hereinabove. In some embodiments, step 402 further comprises inserting at least one stopper element within said at least one of laterally extending channel, allowing the collapsible sole to be in an erected configuration. In some embodiments, method 400 comprises step 404 of providing at least one top part. In some embodiments, the top part is a collapsible top part and/or a removable top part. In some embodiments, step 404 of providing at least one top part further comprises the step of connecting the collapsible sole with the top part.

In some embodiments, method 400 further includes step 406 of compressing the collapsible sole to assume a collapsed configuration, in which the plurality of laterally extending channels is essentially collapsed and the top sheet is brought into proximity with the bottom sheet and/or the top sheet and the bottom sheet assume a corrugated form or conformation. In some embodiments, step 406 further comprises step of forming an essentially acute angle between the plurality of lateral support elements and the top and bottom sheet and/or between interior folds and exterior folds of the collapsible sole, facilitating bringing the top sheet into proximity with the bottom sheet and/or the top sheet and the bottom sheet assuming a corrugated form or conformation and thereby rendering the collapsible sole collapsed and/or compressed. In some embodiments, method 400 further comprises step 408 of altering a configuration of the collapsible sole to assume an erected configuration, in which at least one stopper element stabilizes the plurality of laterally extending channels in an open conformation, whereas the top sheet is spaced apart from the bottom sheet and/or top sheet and bottom sheet assume an essentially straight and/or planar form. In some embodiments, the collapsible sole comprises a frontal portion, a centrical portion and a rear portion, such as in the embodiments shown in FIG. 2A to 2F. In such embodiments, step 406 of method 400 that includes compressing the collapsible sole to assume a collapsed configuration, optionally further includes the folding the collapsible sole to assume a folded configuration, in which in the collapsed configuration, the bottom sheet of the collapsible sole is folded about the centrical portion, so that a frontal portion of the bottom sheet is disposed adjacently to a rear portion of the bottom sheet.

In such embodiments, step 408 of method 400 that includes altering the configuration of the collapsible sole to assume an erected configuration, optionally further includes the altering a configuration of the collapsible sole to assume an unfolded configuration, in which in the unfolded configuration, the bottom sheet of the collapsible sole is straightened, so that the frontal portion of the bottom sheet forming an approximately straight angle relative to the rear portion of the bottom sheet. In some embodiments, the centrical portion accommodates at least one stopper element comprising an essentially trapezoid shape, such as in the embodiments shown in FIG. 2A to 2F. In such embodiments, step 406 of method 400 that includes compressing the collapsible sole to assume a collapsed configuration, optionally further includes the folding the collapsible sole to assume a folded configuration, in which in the folded configuration, the posterior top hinge elements are spaced apart from a top portion of the trapezoidally shaped stopper element.

In some embodiments, step 408 of method 400 that includes altering the configuration of the collapsible sole to assume an erected configuration, optionally further includes the step of altering a configuration of the collapsible sole to assume an unfolded configuration, in which in the unfolded configuration, the top hinge elements are adjoined to the top portion of the trapezoid shape.

It will be appreciated by persons skilled in the art of the invention that various features and/or elements elaborated in the context of a specific embodiment described hereinabove and/or referenced herein and/or illustrated by a particular example in a certain drawing enclosed hereto, whether method, system, device or product, is/are interchangeable with features and/or elements of any other embodiment described in the specification and/or shown in the drawings.