Door lock

Details Door lock Door lock

1985-11-25

1987-01-27

Friedman, Carl D.

Closure fasteners

Bolts

Multiple

292 40, 292 69, 70114, E05C 500

Patent

active

046390219

ABSTRACT:
A door lock for use particularly with sliding patio doors. The lock assembly includes a rotary actuator (door knob) connected to a shaft which drives a crank connected, in turn, to one or more spring-biased bolt rods and operable through the crank to shift the bolt rod to its spring-biased, door-locking position. Stops are positioned to stop the movement of the crank in the locking and unlocking positions of the bolt rod, respectively. Rotary interengaging means such as a pair of meshing gears releasably connect the crank to the shaft assembly. A latch maintains the spring-biased bolt rod releasably in its door-locking position when the gears are meshed. A trip disengages the gear when the bolt rod is in its spring-biased, door-locking position, thereby actuating automatic unlocking of the door.

REFERENCES:
patent: 370331 (1887-09-01), Hamilton
patent: 601090 (1898-03-01), Wright
patent: 2875918 (1959-03-01), Baumier
patent: 3255618 (1964-04-01), Hermann
patent: 4088353 (1978-05-01), Meyer
patent: 4227723 (1980-10-01), Rosell

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