Self-locking lock

Details Self-locking lock Self-locking lock

1998-01-20

2000-10-03

Pham, Teri

Locks

Special application

For closures

70110, E05B 5900

Patent

active

061256706

ABSTRACT:
A self-locking lock with a bolt, a lock swing catch and an auxiliary swing atch, in which the bolt and lock swing catch move out in a locking position in spring-loaded manner with the door closed and move out in a locking position are lockable by a slide plate, while the auxiliary swing catch pressed on a locking plate and in which the bolt, with the door open, is held back in the lock housing and is arrestable by the auxiliary swing catch by means of the slide plate. In order to provide a lock secure against manipulation and reliable in operation, where an uncontrollable extension of the bolt is particularly effectively prevented even in intermediate states of the opening and closing process, on opening the bolt leads compared with the lock swing catch and is arrestable completely retracted in the lock and the lock swing catch is provided with a widening, e.g., with a pivotable, springloaded swing catch part. As a result the lock swing catch engages longer on the locking plate and lags behind the auxiliary swing catch, so that the slide plate and bolt are arrested until the auxiliary swing catch arrests the slide plate and bolt. The lock swing catch widening has no effect on closing.

REFERENCES:
patent: 3881331 (1975-05-01), Tranberg et al.
patent: 4583382 (1986-04-01), Hull
patent: 4950005 (1990-08-01), Cudd
patent: 5044184 (1991-09-01), Herbert et al.
patent: 5083448 (1992-01-01), Karkkainen et al.
patent: 5265920 (1993-11-01), Kaup et al.

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