Lock with torque-release means

Details Lock with torque-release means Lock with torque-release means

1989-11-20

1991-04-30

Wolfe, Robert L.

Locks

Operating mechanism

Key

70222, E05B 1516

Patent

active

050107550

ABSTRACT:
A torque-releasable door handle assembly is provided for operating a door-latching system. The door handle assembly includes a handle shell formed to include a hollow interior cavity having front and rear openings in the handle shell, a lock cylinder mounted in the hollow interior cavity to position its keyway opening in the front opening of the handle shell, and a torque-release mechanism interconnecting the handle shell and the lock cylinder. The lock cylinder is formed to include an axially extending, radially outwardly opening groove located in the hollow interior cavity. The torque-releasable mechanism normally extends into the groove to establish a driving connection between the handle shell and the lock cylinder. The torque-release mechanism is configured to disengage the groove temporarily to break the driving connection in response to the application of at least a predetermined amount of torque to a lever handle appended to the handle shell. The torque-release mechanism is resettable after each disengaging activity to re-establish the driving connection.

REFERENCES:
patent: 1516152 (1924-11-01), Dumont
patent: 3566633 (1971-03-01), Borck
patent: 4195502 (1980-04-01), Best et al.
patent: 4394821 (1983-07-01), Best et al.
patent: 4550581 (1985-11-01), Best et al.
patent: 4655059 (1987-04-01), Best et al.
patent: 4671089 (1987-06-01), Fleming et al.
patent: 4679420 (1987-07-01), Yang
patent: 4773240 (1988-09-01), Foshee

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