Electric door lock actuator

Details Electric door lock actuator Electric door lock actuator

1985-12-16

1987-06-23

Moore, Richard E.

Closure fasteners

Operators with knobs or handles

292DIG62, 292201, E05C 1300

Patent

active

046747818

ABSTRACT:
An electric door lock actuator and door lock and latch mechanism are disclosed having manual and electric driven locking means. A combination of a lost motion coupling and resilient spring means for driving the motive means to a neutral position are utilized to effectively isolate the electric motor and gearing from the locking means such that the locking means may be operated manually without back-driving the electric motor and intermediate gearing. A specific rack defining a portion of the lost motion coupling together with a pair of springs mounted to engage a shoulder extending from a rack are disclosed to achieve the above function.

REFERENCES:
patent: 1304955 (1919-05-01), Fowler
patent: 3243216 (1966-03-01), Peters
patent: 4093289 (1978-06-01), Inabayashi et al.
patent: 4102213 (1978-07-01), Smith
patent: 4290634 (1981-09-01), Gelhard
patent: 4459834 (1984-07-01), Seki

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