Door lock device with anti-theft mechanism

Details Door lock device with anti-theft mechanism Door lock device with anti-theft mechanism

1995-06-30

1997-06-17

Gall, Lloyd A.

Locks

Operating mechanism

Predetermined time interval controlled

70264, 70271, 70277, E05B 4300

Patent

active

056387121

ABSTRACT:
A door lock device comprises a latch mechanism, an opening lever connected to door opening handles, a lock lever connected to a door key cylinder and an inside locking button, an anti-theft mechanism being displaceable between an anti-theft position for disabling an unlocking operation of the inside locking button and a canceling position for enabling the unlocking operation of the inside locking button, a motor for displacing the anti-theft mechanism, a controller for controlling the motor, and a sensor for detecting a locking operation of the key cylinder. When the sensor continuously detects the locking operation of the key cylinder during a predetermined period, the controller puts the anti-theft mechanism into the anti-theft position by operating the motor.

REFERENCES:
patent: 4440006 (1984-04-01), Kleefeldt
patent: 4805427 (1989-02-01), Bates et al.
patent: 4978154 (1990-12-01), Kleefeldt et al.
patent: 5168733 (1992-12-01), Rathmann et al.
patent: 5309743 (1994-05-01), Kokubu et al.
patent: 5428978 (1995-07-01), Tsukano

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