Key lock device

Details Key lock device Key lock device

1995-03-31

1997-05-27

Gall, Lloyd A.

Locks

Operating mechanism

Using a powered device

70408, 70413, E05B 4904

Patent

active

056321686

ABSTRACT:
A key lock device for use in vehicle engine ignition comprising signal transmitting/receiving coils provided on a key and a key cylinder respectively for transmitting and receiving radiowave signals between each other upon insertion of the key into the key cylinder, to judge the authenticity of the key, wherein the coiled antenna is wound coaxially around the key cylinder, and the coils provided on the key is housed integrally in the grip portion of the key so as to situate coaxially with the coiled antenna wound around the key cylinder when a key shank is inserted into the key cylinder. A holding member is formed integrally to the inside of a grip portion of the key, and the coiled antenna provided on the key is housed in the holding member. The coiled antenna wound around the key cylinder is insert-molded in the cover member coaxially with a key-inserting axial line.

REFERENCES:
patent: 4663952 (1987-05-01), Gelhard
patent: 4849749 (1989-07-01), Fukamachi et al.
patent: 5003801 (1991-04-01), Stinar et al.
patent: 5043593 (1991-08-01), Tsutsumi et al.
patent: 5117097 (1992-05-01), Kimura et al.
patent: 5307658 (1994-05-01), Kokubu et al.
patent: 5373718 (1994-12-01), Schwerdt et al.
patent: 5398532 (1995-03-01), Janssen et al.
patent: 5433096 (1995-07-01), Janssen et al.
patent: 5469727 (1995-11-01), Spahn et al.

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