Door lock system

Details Door lock system Door lock system

1999-05-13

2000-11-14

Dayoan, B.

Locks

Operating mechanism

Using a powered device

70264, 292201, 292216, 292DIG23, E05B 4700

Patent

active

061453544

ABSTRACT:
A door lock system has a closing mechanism for bringing an ajar condition of a door into a fully closed condition. The fully closed condition of the door is locked for the sake of safety by the locking operation of a locking-and-unlocking mechanism. The locked condition of the door is released by an unlocking operation of the locking-and-unlocking mechanism. Moreover, by actuating a double lock mechanism, the door under the locked condition is further brought into a double-looked condition under which the unlocking operation of the locking-and-unlocking mechanism cannot be established. The closing mechanism, the locking and-unlocking mechanism, and the double lock mechanism are driven by a common electric motor thus allowing the door lock mechanism to be reduced in size and manufactured less expensively.

REFERENCES:
patent: 4762348 (1988-08-01), Matsumoto
patent: 4843849 (1989-07-01), Kamke et al.
patent: 4927204 (1990-05-01), Asada
patent: 4986579 (1991-01-01), Ishikawa
patent: 5409277 (1995-04-01), Rogers, Jr. et al.
patent: 5680783 (1997-10-01), Kuroda
patent: 5769468 (1998-06-01), Armbruster
patent: 5938251 (1999-08-01), Watanabe

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