Anti-lockout smart key system

Details Anti-lockout smart key system Anti-lockout smart key system

1998-01-14

1998-11-03

Swarthout, Brent

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340426, 340539, 34082531, 307 101, 307 103, B60Q 100

Patent

active

058315209

ABSTRACT:
An apparatus and method for alerting a driver that the keys have been left inside the vehicle with the doors locked uses a smart key. The smart key (10) has a built-in transmitter and receiver (12), a battery (11) and a mechanical switch (14) for deactivating the transmitter/receiver to conserve key battery power. The apparatus and method cover the four different situations that can exist after the vehicle doors are closed and locked. First the driver is inside the vehicle. Second, the driver is outside the vehicle and has the key. Third, the driver has left the key behind in the ignition (16). Fourth, the driver has left the key behind somewhere in the vehicle other than the ignition. Situations three and four merit alerting the driver, and the system activates an alarm (24) to notify the driver and temporarily unlock the doors.

REFERENCES:
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patent: 5438312 (1995-08-01), Lewis
patent: 5451928 (1995-09-01), Cody
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patent: 5600302 (1997-02-01), Lewis
patent: 5659291 (1997-08-01), Kennedy et al.
patent: 5679984 (1997-10-01), Talbot et al.

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