Push-up Fitting

Description

The present invention relates to an improved push-up fitting for a sink, tub or the like.

Push-up fittings are important components in sanitation facilities such as sinks, tubs or similar facilities. Their main purpose is to discharge the outflowing water in a controlled manner, at the same time filtering out solids or impurities. This is achieved by means of valves, filter baskets and other mechanical elements.

Typically, push-up fittings are inserted into sinks or tubs from the top. They are normally designed such that they can be easily introduced in the respective hole in the sink bottom from the top. On the bottom, they are frequently connected to a siphon trap so as to ensure an odorless discharge.

Due to the different thicknesses of sinks, tubs and other devices, there are many different versions of push-up fittings. They are rarely adaptable and must be selected from a plurality of different versions in order to ensure safe and efficient installation in the respective environments.

Some sinks and tubs are equipped with spillway systems for preventing overflow. In such configurations, the water reaches the push-up fittings from the spillway, which requires a special design for handling this additional flow of water.

Push-up fittings can be provided with push-up valves which make it possible to control the water discharge manually by pressing the valve. Normally, the outlet is opened by pressing of the valve into the discharge position, and is returned into the closing position by pressing the valve again.

Push-up fittings are normally operated manually by a user wherein he operates the valve or plugs the spillway. In some models, technological solutions such as sensors or remote control may also be integrated.

Because wastewater pipes tend to be clogged by hair and other particles, there is a continuous need for opening push-up fittings in order to remove these elements. This is necessary not only for maintenance but also for maintaining regular discharge and preventing clogging. Here, access to filter baskets or valves without the use of tools comes into play so as to allow easy and efficient cleaning.

The aim of the present invention is to provide an improved push-up fitting for sinks, tubs or similar devices which allows different versions of efficient and user-friendly discharge, wherein a push-up valve can be inserted into and removed from the push-up fitting without the use of tools.

This aim is achieved by a push-up fitting having the characteristics of Claim 1, with the push-up fitting being provided for a sink, a tub or the like.

Advantageous further developments of the invention are indicated in the dependent Claims.

Preferably, the push-up fitting has a drain pipe with a central longitudinal axis whose upper axial end is adapted for attachment to a sink or tub bottom and whose lower axial end has an outlet. The drain pipe has a fluid channel between the upper axial end and the outlet. The push-up fitting additionally has a push-up valve adapted as an insert for the drain pipe so that it can be fitted into the drain pipe from above. The push-up valve has a spring and locking mechanism which can lock the valve in a closing position and in a discharge position. The push-up valve is equipped with a plug which, in the closing position, rests on the drain pipe in order to close the push-up fitting, and which in a discharge position opens the outlet of the drain pipe. The push-up fitting advantageously has a reservoir in particular for fragrances. The push-up fitting has a support element for the spring and locking mechanism of the push-up valve, which element serves as an abutment for the push-up valve when the spring and locking mechanism of the push-up valve is operated by pressure on the plug of the push-up fitting. The drain pipe has a constriction which carries the support element in the drain pipe so that it is supported during operation.

By “sinks, tubs and the like”, presently various sanitary tanks used to accommodate liquids or to achieve cleaning purposes in buildings are to be intended. This comprises, among others, sinks in bathrooms and kitchens, bathtubs, showers for body cleansing, rinsing bowls in kitchens for washing dishes, seating tubs for comfortable sitting during bathing, whirlpools or jacuzzis with water jets for therapeutic effects as well as various tubs in public facilities. The expression refers to a plurality of sanitary facilities used in homes, public buildings and commercial entities.

The push-up fitting normally consists of a drain pipe with a central longitudinal axis. As a rule, the upper axial end of this drain pipe is adapted to be fastened to the bottom of a sink, a tub or a similar unit. Frequently, at this upper end, a head of the drain pipe is formed as a collar which snugly conforms to the bottom of the sink or tub so as to ensure safe and tight fastening.

The lower axial end of the drain pipe has an outlet through which normally the received fluid is forwarded to a subsequent drain pipe. This drain pipe is frequently connected to a siphon trap. A siphon trap, as a rule, is a bent piece of pipe having the shape of an “S” or a “U”, which is filled with water. Roughly, the function of a siphon trap is to form a water seal. This water seal prevents the rise of unpleasant odors and gases from the drain pipe into the room since the water in the siphon trap acts as a barrier. At the same time, the siphon trap allows unimpeded outflow of liquids. When water flows through the drain pipe, the water seal is for a short time interrupted and then restored, the odor barrier being maintained in this manner.

The push-up fitting has a push-up valve. A push-up valve comprises, in a well-known manner, a mechanism used to control discharge of the water. This push-up valve is equipped with a spring and locking mechanism. The spring and locking mechanism allows the push-up valve to lock one of two main positions: the closing position and the discharge position.

In the closing position, the plug of the push-up fitting rests on the drain pipe, closing the push-up fitting. In this position, the outlet of the drain pipe is blocked, preventing the water discharge.

For opening the push-up fitting, the push-up valve is normally operated manually. Pressing the valve actuates the spring and locking mechanism of the push-up valve, pressing the plug of the push-up fitting upwards, where it reaches the discharge position. In this discharge position, the outlet of the drain pipe is freed and the water can flow down unimpeded.

Operation therefore commonly takes place by simple pressing of the push-up valve, offering a comfortable and user-friendly possibility of controlling water discharge in the push-up fitting.

The plug of the push-up fitting preferably has a diameter of 4 to 8 cm, preferably 6 cm.

The push-up valve necessitates a supporting element for the spring and locking mechanism of the push-up valve in order to guarantee a stable and functioning construction. The supporting element for the push-up valve has a decisive role by acting as the point of support for the spring and locking mechanism of the push-up valve.

The supporting element for the push-up valve is adapted so as to withstand the pressure exerted on the plug when the push-up valve is operated. In case of pressure on the plug, the spring and locking mechanism of the push-up valve is actuated, and the supporting element with the constriction of the drain pipe supports the process. This process ensures that the mechanism functions properly and alternates with precision between the closing position and the discharge position.

In practice, this means that the supporting element, with the constriction of the drain pipe, acts as a point of resistance when the plug of the push-up fitting is pressed. This action actuates the spring and locking mechanism of the push-up valve which then lifts the plug of the push-up fitting and reaches the desired position. The supporting element with the constriction of the drain pipe thus contributes to guarantee stability and efficiency of the mechanism when the push-up valve is operated.

The reservoir is preferably designed such that it offers the possibility of receiving a fragrance or a disinfectant. Here, the reservoir is preferably used as a carrier for the fragrance or the disinfectant so as to provide the outflowing water with a pleasant odor or a hygienic component.

The fragrance or disinfectant in the reservoir can have the form, for instance, of gel capsules, aroma balls or other safe and water-soluble carrier materials. When water flows through the reservoir, it at least partially comes in contact with the content of the reservoir. In this manner, the fragrance is activated and/or the disinfectant released and it can mix with the outflowing water.

This function adds an olfactory or hygienic aspect to the outflowing water. Thus, it adds not only a functional, but also a sensory asset to the push-up fitting. Dosing of the fragrance or disinfectant can be adapted to the individual preferences or requirements of the user.

In an alternative embodiment of the reservoir in the push-up fitting, a filter, for instance, can be used to retain and filter solids and impurities from the outflowing water. The reservoir acts as a kind of sieve or filter which catches larger particles, like hair, dirt or other solids, before the water continues to flow through the discharge system.

More specifically, the outflowing water can be guided through the reservoir for this purpose, while solid particles remain in the basket. This function prevents particles from reaching the drain pipe and potentially causing clogging. In this manner, with this design, the reservoir allows effective cleaning of the outflowing water and helps to maintain the functionality and unimpeded operation of the push-up fitting.

Cleaning or evacuating the reservoir at regular intervals is necessary for removing accumulations of solids and ensuring optimum filter performance. This function of the reservoir is particularly preferred in sanitary facilities where hair, soap residues and other particles can frequently reach the wastewater system.

The drain pipe preferably has a length of at least 4 cm, preferably 7 cm, particularly preferably 10 cm.

The reservoir preferably has an outer diameter of 2.5 to 4 cm, preferably 3.2 cm.

According to the invention, the push-up valve is embodied as an insert for the drain pipe, which means that it can be introduced into the drain pipe directly from above. This construction allows easy installation and maintenance, given that the push-up valve can be introduced into the drain pipe directly from above.

In addition, the drain pipe has a constriction which is specifically adapted for carrying the supporting element for the push-up valve in the drain pipe. This constriction of the pipe is designed to support and stabilize the supporting element for the push-up valve, in particular during operation of the push-up valve.

The structure with the constriction of the drain pipe ensures that the supporting element for the push-up valve, which is of decisive importance for functioning of the push-up valve, is sufficiently retained during push-up valve operation. This is important for ensuring proper operation of the mechanism and guaranteeing reliable locking in the various positions, such as the closing position and the discharge position.

In summary, constructing the push-up valve as an insert and providing a constriction within the drain pipe allow easy handling, installation and safe functioning of the push-up fitting.

Various embodiments of the constriction in the drain pipe are possible in order to carry the supporting element for the push-up valve and support it during operation of the same. These are some possible variants:

1. Tapering web at the lower end: the constriction of the drain pipe might have the form of a tapering web at the lower end of the fluid channel. This taper is used for holding the supporting element for the push-up valve and provide a supporting structure.

2. Circumferential tapering edge: a circumferential tapering edge along the fluid channel of the drain pipe might act as the constriction of the pipe. This edge could comprise the supporting element for the push-up valve and retain it when the push-up valve is operated.

3. Shape of the fluid channel: the fluid channel itself could taper or have a shape which acts as the constriction of the drain pipe. A conical shape or a specific contour of the fluid channel could carry the supporting element for the push-up valve in the drain pipe.

4. Interior ribs or braces: the drain pipe might have interior ribs or braces along the fluid channel so as to offer structural support for the supporting element of the push-up valve.

5. Combination of different elements: it is also possible to use a combination of these approaches, for instance a circumferential edge in combination with a tapering web at the lower end or interior ribs.

In the preferred embodiment, the drain pipe has the form of a circular ring. That means that it has the shape of a circular ring or an annular structure. This shape is, as a rule, similar to a cylinder, the inner and outer rim of the drain pipe forming a closed ring. Alternatively, other embodiments of the drain pipe which deviate from the form of a circular ring are possible as well, for instance elliptical shapes.

Specifically, the drain pipe may be conceived as having the shape of a hollow cylinder wherein the cross-section forms a closed ring. The annular design is characterized by a preferably continuous, closed outer circumferential line.

This shape provides certain advantages, such as easy handling, an even flow of water and good adaptability to different sink and tub bottoms. The annular embodiment also allows efficient integration in various sanitary facilities, and facilitates installation as well as operation of the push-up fitting.

In the preferred embodiment, the drain pipe is provided with a thread along its outer surface area. This means that there is a screw-like structure along the outer circumference of the pipe.

This threaded embodiment allows easy and secure fastening of the drain pipe to different sink, tub or similar bottom surfaces.

The thread is preferably a 1¼ inch thread.

In addition, a fixation element is provided in this preferred embodiment, which can be screwed onto the thread from below. The fixation element is used to fasten the drain pipe stably and securely to the sink, the tub or a similar structure. By screwing in the fixation element, the drain pipe is securely connected to the respective bottom structure.

The fixation element which is screwed onto the thread from below preferably has an outer diameter of 5 to 6 cm, preferably 5.7 cm.

This combination of a thread on the drain pipe and the fixation element which can be screwed onto it represents a robust fastening method ensuring easy assembly and safe retention. This configuration also allows an adaptation to different thicknesses of sink or tub bottoms since the fixation element can be flexibly adjusted.

In the preferred embodiment, the outside of the fluid channel is formed by the inner surface area of the drain pipe.

The drain pipe can be provided with recesses which are positioned in the surface area in a targeted manner. These recesses are designed such as to allow a fluid connection between the fluid channel and, for instance, a spillway in the outer region of the drain pipe. The arrangement of the recesses is aimed at providing effective communication between the fluid channel and the spillway.

This configuration allows a targeted flow of liquid between the fluid channel and the outer region of the drain pipe, in particular with regard to the spillway. In this manner, it is ensured that excess fluid reaching the spillway is efficiently guided into the fluid channel. This embodiment promotes a reliable discharge of liquids, preventing potential overflow problems.

In the preferred embodiment, the annular drain pipe and the fluid channel have the following preferred dimensions: The outer diameter of the drain pipe is preferably between 3 and

6 cm, particularly preferably 4 cm.

The inner diameter of the drain pipe is preferably between 2.8 and 5.8 cm, particularly preferably 3.7 cm.

The recesses in the surface area of the drain pipe can have a width of, for example, 1 and 3 cm; preferably the recesses in the surface area of the drain pipe have a width of 1 cm.

The recesses in the surface area of the drain pipe can have a height of between 1 and 3 cm; preferably the recesses in the surface area of the drain pipe have a height of 2 cm.

The recesses are preferably arranged between 2 and 4 cm below the upper rim of the drain pipe.

These dimensions are to be intended as examples and may vary depending on the specific requirements, design preferences and functional necessities of the push-up fitting. They are intended to exemplify the structure and function of the annular drain pipe with the fluid channel and the recesses in the preferred embodiment.

In the preferred embodiment of the push-up fitting, the plug of the push-up fitting is designed so as to be removable without tools in order to allow easy access to the reservoir. This means that no special appliances are required for opening the reservoir. Instead, the reservoir for fragrances can be opened easily and comfortably so as to allow an easy access to the reservoir for cleaning and/or maintenance purposes.

One possible embodiment could entail that the reservoir can be opened, for example, simply by turning, pulling or pressing without the use of tools. This allows handling by the user and speeds up maintenance of the push-up fitting. The tool-free mechanism helps to make the introduction of a fragrance, and/or the cleaning process, more efficient and to improve operational comfort for the user.

In the preferred embodiment, the plug of the push-up fitting is connected to the reservoir by means of a thread or a locking mechanism. This design allows easy and secure attachment of the plug of the push-up fitting to the reservoir in order to ensure reliable covering and sealing.

For instance, the plug of the push-up fitting can be connected to the reservoir by a rotational movement by means of a thread or a locking system. The selected mechanism, be it a thread or a locking mechanism, contributes to fix the plug of the push-up fitting securely into place and to establish a stable connection between the push-up valve and the reservoir.

The tool-free connection of the plug of the push-up fitting to the reservoir facilitates handling of the push-up fitting for the user and allows an easy access to the reservoir for introducing a fragrance and/or for cleaning and maintenance purposes.

In the preferred embodiment, the reservoir is positioned in such a way that it is located between the plug of the push-up fitting and the spring and locking mechanism of the push-up valve. This arrangement creates a compact structure which allows efficient utilization of existing space.

By this positioning, the available space is optimally used. This compact arrangement is particularly advantageous in limited spaces such as they frequently exist in bathtubs or sinks.

Skillful positioning of the reservoir contributes to saving space and, at the same time, allows efficient usage of the push-up fitting. In this way, the overall functionality of the push-up fitting is improved without taking up unnecessary space.

In the preferred embodiment, the plug of the push-up fitting at the same time functions as the plug of the reservoir for fragrances. This means that the plug of the push-up fitting assumes both the function of the plug of the push-up valve and that of the plug of the reservoir for fragrances.

This embodiment has the advantage of a space-saving construction since the plug of the push-up fitting has a double function. It not only secures the spring and locking mechanism of the push-up valve but also serves as a covering for the reservoir. This integration minimizes the number of components required and contributes to creating a compact push-up fitting.

The dual function of the plug also facilitates access to the reservoir for introducing a fragrance and/or for cleaning and maintenance purposes since the plug can be opened without the use of tools. This makes the arrangement more user-friendly and contributes to the efficiency of the push-up fitting.

In the preferred embodiment, the push-up valve is equipped with an adjusting element. This adjusting element makes it possible to individually adjust the distance between the closing position and the discharge position. In this manner, users can adjust the push-up fitting according to their specific requirements or preferences.

In this embodiment, the adjusting element allows variable setting of the position since the push-up valve is between the closed and the open position. Users can preferably adjust the discharge speed and/or the degree of opening so as to optimize the push-up fitting operation according to their individual requirements.

This function makes it possible to flexibly adapt the push-up fitting to different flows of water or user preferences, achieving customized control over the discharge process.

In a preferred embodiment, the reservoir is designed such that outflowing fluids are conducted through it. This embodiment allows effective filtration and retention of solids and/or impurities in the outflowing water.

The reservoir is preferably adapted for the outflowing fluids to pass through it while it at the same retains solids or impurities. This guarantees improved water quality and prevents particles or dirt from reaching the wastewater system. The structure of the reservoir is such as to form an effective barrier for undesired substances while at the same time allowing the unimpeded passage of water.

The reservoir for fragrances contributes to increasing lifetime and efficiency of the push-up fitting by ensuring reliable filtration of solids and impurities.

In a preferred embodiment, the reservoir can additionally be provided with a seal which is designed to conduct outflowing water at the upper end of the drain pipe into the reservoir in a targeted manner. This seal is preferably positioned such that it ensures effective sealing between the drain pipe and the reservoir.

The seal allows the outflowing water at the upper end of the drain pipe to be conducted into the reservoir before it flows out into the discharge channel. This targeted discharge of the water into the reservoir helps to achieve an improved filtration since solids and impurities are retained more efficiently in the reservoir. In this embodiment, the water preferably flows from the reservoir downstream into the fluid channel.

This additional seal contributes to optimizing the effectiveness of filtration in the reservoir so that no undesired particles pass by the reservoir.

In a preferred embodiment, the push-up fitting has a device which is used to accommodate and retain a pelletized water-soluble substance. This substance can have different properties; it can be, for example, an antiseptic, a germ-killing agent, an antibacterial and/or fungicidal substance, a deodorant, a fragrance, a perfume, a cleaning agent or a different water-soluble substance or a mixture of these substances.

The device is preferably designed such that it securely accommodates and retains the pelletized water-soluble substance while at the same time a targeted release into the outflowing water is made possible. In this way, the outflowing water can be provided with additional properties, such as antibacterial or aromatic effects, so as to improve the hygienic conditions or the odor in the environment.

The device can be, for instance, a separate reservoir within the push-up fitting, and can allow targeted release of the pelletized water-soluble substance through specific openings or channels. This contributes to enriching the outflowing liquid so that it can perform specific functions in addition to the filtration as such.

In one embodiment, the reservoir has at least one wall which is open along the main extension axis. This means that along the main extension axis of the reservoir for fragrances, there is an open structure which allows a targeted interaction with the surrounding liquid.

The open wall can be formed, for example, by recesses, grid structures or perforated portions. This structuring allows an unimpeded perfusion of the outflowing liquid through the reservoir and/or the device while solids or other substances are retained.

The open wall along the main extension axis promotes efficient filtration and allows targeted release of the pelletized water-soluble substance into the outflowing water. This contributes to making effective use of the desired additional properties of the substance without impairing the normal outflow process.

Some embodiments will now be described using the Figures wherein

FIG. 1 is a perspective explosive view of a push-up fitting of a first example of embodiment in a disassembled state;

FIG. 2 is a lateral view of the push-up fitting of FIG. 1 in a disassembled state;

FIG. 3 is a lateral view of the push-up fitting of FIG. 1 in an assembled, but open state; and

FIG. 4 is a lateral view of the push-up fitting of FIG. 1 in an assembled, but closed state.

FIG. 1 shows a push-up fitting 1 for a sink 5, a tub or the like. At the bottom of the image, a drain pipe 2 with a central longitudinal axis is shown whose upper axial end is adapted to be attached to the bottom of a sink or tub. The upper end of the drain pipe 2 has a head 4 (in this example of embodiment a collar) which is designed to conform snugly to the bottom of the sink 5 or tub so as to ensure secure and tight fastening.

The push-up fitting 1 has a push-up valve 6 with a spring and locking mechanism which can lock a plug 10 of the push-up fitting 1 in a closing position and in a discharge position.

The plug 10 of the push-up fitting preferably has a seal 11 which, in the closing position, rests on the head 4 of the drain pipe 2 so as to close the push-up fitting 1.

The push-up valve 6 is formed in a well-known manner and has a body 17 adapted to receive an axially acting spring 18 of the push-up valve 6, the axially acting spring 18 pressurizing a movable part 19 of the push-up valve 6 upwards in the axial direction in order to transfer the plug 10 into the discharge position; the push-up valve 6 further having a spring and locking mechanism inside its body 17 which is adapted to keep the plug 10 in the closing position.

The push-up fitting 1 preferably has a reservoir 8 which is designed such that it offers the possibility of receiving, for instance, a fragrance or a disinfectant. Preferably, the reservoir 8 is arranged between the plug 10 and the push-up valve 6 and connects the plug 10 to the push-up valve 6. Further preferably, the connection between the push-up valve 6 and the reservoir 8 can be releasable, for instance in the form of a threaded connection. However, a direct connection between the plug 10 and the push-up valve 6 is possible as well.

The reservoir 8 preferably has an exterior thread 9 via which it can be releasably connected to an interior thread 12 of the plug 10 of the push-up fitting 1. With its lower end, the push-up valve 6 is connected to a supporting element 7 for the push-up valve 6 which, in this example of embodiment, is connected to a body 17 of the push-up valve 6 via a fastening portion 14. Advantageously, the fastening portion 14 of the supporting element 7 is releasably connected to the body 17 of the push-up valve 6 such that the supporting element 7 can be easily replaced for adapting the push-up valve 6 to drain pipes 2 having different dimensions/diameters. Further preferably, this connection can be released without the use of tools. In the preferred embodiment, the connection is formed as a thread 16 of the push-up valve 6 which threadingly connects the body 17 to a complementary portion of the supporting element 7.

The push-up valve 6 and the reservoir 8, if there is any, naturally have smaller dimensions/diameters than the drain pipe 8, so that by means of the simple (preferably tool-free) replacement of the supporting element 7 and/or the plug 10, the push-up valve 6 according to the invention can be employed with different drain pipes.

In this representation, a stop 20 of the push-up valve 6 is shown which limits and/or adjusts an up-and-down movement of the push-up valve 6. Above it, the movable part 19 of the push-up valve 7 is shown which can slide in a guide track 21.

The reservoir 8 preferably has several slots 13 as openings to be able to conduct outflowing fluids through them and for releasing the fragrance or the disinfectant.

For secure positioning of the reservoir 8 in the fluid channel of the drain pipe 2, the reservoir 8 in this embodiment has guide tabs 15.

In the lateral view of FIG. 2 of the push-up fitting 1 from FIG. 1, the push-up valve 6 is positioned above the tubular drain pipe 2. The push-up fitting 1 is designed such that the push-up valve 6 can be inserted into the drain pipe 2 from above. The upper axial end of the drain pipe 2 is specifically designed to be fastened to the bottom of a sink 5, a tub or the like. The head 4 of the drain pipe at the upper axial end of the drain pipe 2 fits snugly so as to ensure tight and secure fastening.

FIG. 2 also shows the thread 22 along the outer surface area of the drain pipe 4. A fixation element 23 for the drain pipe 4 is screwed onto the thread 22, which, in the completely assembled state, rests on the tub 5 from below. The fixation element 23 is designed to fasten the drain pipe 4 securely and stably to the sink or tub 5. The recesses 24 of the drain pipe 4 are positioned such as to allow a fluid connection from a spillway 25 of the sink or tub 5.

In the lower portion of the drain pipe 2, a tapering web is formed as a constriction 3 of the drain pipe 2. This web serves as a support for the supporting element 7 for the push-up valve 6. The constriction 3 can be formed circumferentially or with interspaces on the inner surface area of the drain pipe 3.

Support of the push-up valve 6 by the constriction 3 allows simple, tool-free removal and easy, tool-free insertion of the push-up valve 6 into the drain pipe 2 and avoids additional procedures such as screwing the push-up valve 6 in or out for removal from or insertion into the drain pipe 2. This greatly facilitates cleaning of the push-up valve 6 by removing impurities such as hair, food residues or the like.

In FIG. 3, which shows the assembled state of the push-up fitting 1 of FIGS. 1 and 2, it can be clearly seen how the supporting element 7 for the push-up valve rests on the constriction 3 of the drain pipe 2. The push-up valve 6 is in the discharge position, the plug 10 of the push-up fitting 1 is accordingly opened and the outlet of the drain pipe 2 is open. This position allows a discharge of liquids.

The constriction 3 of the drain pipe 2, which is here embodied as a tapering web at the lower end of the drain pipe 2, bears the supporting element 7 for the push-up valve 6 and ensures stable support when the push-up valve 6 is actuated in the direction of the black arrow above the plug 10. The plug 10, shown in the discharge position in FIG. 3, allows an unimpeded outflow of fluids from the sink or tub 5.

FIG. 4 shows the closed state of the push-up fitting 1 in the previous Figures. The push-up valve 6 is in the closing position, wherein the plug 10 of the push-up fitting 1 tightly rests on the head 4 of the drain pipe 2. The seal 11 located on the plug 10 of the push-up fitting 1 provides safe sealing and closes the push-up fitting 1 in order to prevent an uncontrolled outflow of liquids.

The supporting element 7 for the push-up valve 6 continues to rest on the constriction 3 of the drain pipe 2 at the lower end of the drain pipe 2. This configuration ensures stable positioning of the push-up valve 6 and helps to maintain the closed state of the push-up fitting 1.

The closed position guarantees that the push-up valve 1 is effectively sealed so as to prevent an unintended outflow of liquids. This is of particular importance when the tub 5 is filled with water and sealing is necessary to maintain the water level.

LIST OF REFERENCE NUMBERS

• • 1 push-up fitting
  • 2 drain pipe
  • 3 constriction of drain pipe
  • 4 head of drain pipe
  • 5 sink
  • 6 push-up valve
  • 7 supporting element for push-up valve
  • 8 reservoir
  • 9 external thread of reservoir
  • 10 plug of push-up fitting
  • 11 seal of plug
  • 12 interior thread of plug
  • 13 slots of reservoir
  • 14 fastening portion for the push-up valve
  • 15 guide tabs of reservoir
  • 16 thread of push-up valve
  • 17 body of push-up valve
  • 18 spring of push-up valve
  • 19 movable part of push-up valve
  • 20 stop of push-up valve
  • 21 guide track of push-up valve
  • 22 thread of drain pipe
  • 23 fixation element for drain pipe
  • 24 recesses of drain pipe
  • 25 spillway of a sink/tub