Key device for a vehicle

Details Key device for a vehicle Key device for a vehicle

1996-10-09

1999-02-16

Boucher, Darnell M.

Locks

Operating mechanism

Using a powered device

70413, 307 103, E05B 4900, B60R 2504

Patent

active

058709134

ABSTRACT:
A key device having a key coil (75a) disposed in a key (75) inserted into a key cylinder (2). Vehicle coils (5a to 5d) which are disposed on a vehicle and to be magnetically coupled with the key coil (75a) perform supply of an electric power and air-propagation communication, thereby reading code information transmitted from the key (75a) . The coils are configured in such a manner that the vehicle coils (5a to 5d) are disposed in the vicinity of a key insertion slot (2a) of the key cylinder (2) so that an induction magnetic field is generated in a substantially upper half portion of the key insertion slot or in a pair of lateral portions on both the sides of the key cylinder.

REFERENCES:
patent: 4145725 (1979-03-01), Wallis
patent: 4849749 (1989-07-01), Fukamachi et al.
patent: 4918955 (1990-04-01), Kimura et al.
patent: 4953123 (1990-08-01), Takeuchi et al.
patent: 5307658 (1994-05-01), Kobubu et al.
patent: 5351042 (1994-09-01), Aston
patent: 5469727 (1995-11-01), Spahn et al.
patent: 5679984 (1997-10-01), Talbot et al.

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