Spring-loaded dead bolt assembly

Details Spring-loaded dead bolt assembly Spring-loaded dead bolt assembly

1982-01-25

1988-08-23

Smith, Gary L.

Closure fasteners

Bolts

Sliding

292335, 292333, F05C 108

Patent

active

047656638

ABSTRACT:
A lock assembly is provided which contains a spring-loaded dead bolt and a spring-loaded plunger intercoupled to one another. The assembly is such that when the door is closed, the plunger is pushed in by the striker plate on the door frame, and this releases the spring-biased dead bolt and causes the dead bolt to be fully extended into the cavity in the striker plate. When that occurs, the linkage coupling the assembly to the doorknob moves to a position in which one of its members serves as a stop to prevent the dead bolt from being forced back to a retracted position until the doorknob is turned.

REFERENCES:
patent: 600584 (1898-03-01), Kaye
patent: 970628 (1910-09-01), Leistler
patent: 2854270 (1958-09-01), Ward
patent: 4262504 (1981-04-01), Inoue

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