Three piece key assembly

Description

FEDERALLY SPONSORED RESEARCH

Not applicable

SEQUENCE LISTING OR PROGRAM

Not applicable

BACKGROUND OF THE INVENTION

Field of Invention

Lock key assembly made of 3 interlocking pieces

Prior Art

The inventor is aware of previous patents and claims of a general type of different key mechanism. US patent 2005/0217327 to Antonio Frias shows two open projections of the key blade which surrounds a semi circle and creates a semi hole. This hole extends also to the key head. A locking pin is seated in this hole with no means of arresting mechanically the axial movement of this locking pin. US patent 2004/0148988 Mark Raymond Taylor shows no mechanical means of locking the key blade to the key head. It describes it to be “reasonably held” by friction, glue, epoxy or welding. U.S. Pat. No. 3,950,973 Serge Graniansky describes a key with a male protrusion a key holder with an equivalent female cut out, to accommodate said male protrusion. This sub assembly has to be assembled first. The key holder has a slight angle on its side edges, corresponding to the slight angle in the slot of the key head. The sub assembly is pushed into the key head to be held in place by forced wedging action. There is no means of a positive mechanical locking action.

BACKGROUND OF THE INVENTION OBJECTS AND ADVANTAGES

This invention has a positive mechanical locking action. The locking mechanism is straight forward applying a simple push to the snap lock, and the assembly is positively mechanically locked. There is no wedging, glue, friction, welding or screw tightening in this invention. The inventor wants to point out the special design of the locking mechanism of this invention. The design is simple, and easy to manufacture. Lock smiths and key cutters have no problem handling the key cutting and the assembly. An angled notch is provided on one side of the snap lock flange in order to release the key assembly to disengage as needed.

DRAWING FIGURES

FIG. 1 Shows an exploded view of the Three Part Assembly

FIG. 2 Shows the front view of the key assembly

FIG. 3 Shows a cross-section of the assembly before locking in with the Snap-lock

FIG. 4 Shows a cross-section of the assembly after inserting the snap-lock

DETAILED DESCRIPTION—FIGS.

A key assembly consisting of a head 10 FIG. 1, a snap-lock 11 FIG. 1, and a key blade 12 FIG. 1. The head 10 having a casing area on it's one end 13 FIG. 2, and a ornamental area 16 FIG. 2. The ornamental area 16 might change in style for artistic purposes. The casing area 13 will be in design always the same. The casing area 13 has a slot on it's distal end 14 FIG. 1 to receive the key blade 12. The slot having a stop on its end 15 FIG. 1 and tight slide fits on the sides 26 FIG. 3 to make a tight engagement with the key blade 12. The key blade having a square opening 17 FIG. 1. The casing area having a square opening 19 on the top surface 20 FIG. 1 to facilitate entry of the snap-lock 11. The snap-lock having two springy arms 22 FIG. 3 with protrusions 21 FIG. 3 to slide and bend inwards and slide over the dead point 23 FIG. 3 of the casing area of the head, and to snap back after passing the dead point of the casing area 23 FIG. 3 and positioning itself into the square hole 17 FIG. 3 of the key blade 12 FIG. 3, having a tight fit with the hole of the key blade and positively locking the key blade 12 into position. In addition the snap-lock has on its side on the lower part of its flange an angled notch 25 FIG. 4 which exist to insert a small sharp tool to release the snap lock from the head and to disengage the key blade from the casing.

Operation:

In order to assemble these three parts into a key assembly the key blade 12 FIG. 1 is inserted into the slot 14 of the casing until it hits the end stop 15 of the head 10. The snap-lock 11 is than pushed from above into the square opening 19 of the casing where it will engage with a distinctive click and lock the key blade 12 into position being seated in the square opening 19 of the casing, and locking the key blade into position by engaging the square opening 17 FIG. 3 of the key blade. Although the key assembly is perfectly rigid it can be taken apart by means of an angled notch 25 FIG. 4. To disengage this assembly, a small sharp tool will be inserted into the angled notch 25 on the side of the snap-lock 11 and by doing a lever action with a small tool the snap-lock 11 will be disengaged from its locked position and the key assembly will be disassembled.

DRAWINGS Reference Numerals

• Head 10
• Snap-Lock 11
• Key Blade 12
• Casing area 13
• Slot 14
• Stop End 15
• Ornamental Area 16
• Key square opening 17
• Head square opening 19
• Top surface 20
• Protrusions of Snap-Lock 21
• Springy Arms 22
• Dead point 23
• Angled Slot 25
• Slide Fits 26