Door lock with spring bolt and dead bolt

Details Door lock with spring bolt and dead bolt Door lock with spring bolt and dead bolt

1980-01-15

1982-04-06

Lyddane, William E.

Locks

Special application

For closures

70153, 70448, 292169, 292DIG38, 292DIG61, E05B 5900

Patent

active

043229581

ABSTRACT:
In a door lock with spring bolt and dead bolt the lock follower body injection molded from thermoplastic synthetic resin is rotatably mounted in the lock case and resilient in itself without bias and without being influenced by any spring force when by radial movement of the lock follower body a plurality of legs extending therefrom bears against retaining pins and develops spring action by bending.
The required spring load on the tumbler is effected by the provision of a free leg at the tumbler which rests unbiased against a stop pin and resiliently bends upon actuation by the key. The mounting of a door fitting at the door panel is facilitated by bores through sleeves provided in the lock case.
The inexpensive fabrication permitting at the same time a maximum possible degree of dimensional precision is achieved by making both the lock case and the interior parts from thermoplastic synthetic resin containing no plasticizer. Preferably a polyacetal is used for the interior parts.

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