Key chain retainer

Details Key chain retainer Key chain retainer

1977-04-04

1978-07-18

Wolfe, Robert L.

Locks

Parts, attachments, accessories and adjuncts

For key-operated mechanism

A44B 1500

Patent

active

041007794

ABSTRACT:
A key retainer having a structure such as to substantially reduce the risk of loss by bouncing out of a pocket. A block of compressible foam such as polyurethane foam has a key chain attached. By compressing the block of foam with the hand and inserting it into the pocket, the foam resiliently expands, substantially filling the pocket or otherwise exerting pressure against the material of the pocket. These forces as well as the accompanying friction forces hold the key retainer securely and safely in the pocket, even in the presence of bouncing or inverting the pocket.

REFERENCES:
patent: 2694844 (1954-11-01), Grumbach
Popular Science, Jun. 1961, Keys that Float, p. 135.
Popular Mechanics, Jul. 1953, Keys Carried Safely in Rowboat when Tied to Fishing Bobber, p. 160.

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