Lock cylinder cover with time delay closure

Details Lock cylinder cover with time delay closure Lock cylinder cover with time delay closure

1988-02-17

1988-09-27

Wolfe, Robert L.

Locks

Parts, attachments, accessories and adjuncts

For key-operated mechanism

70423, 70427, 70DIG48, 16 82, E05B 1718

Patent

active

047732423

ABSTRACT:
A deck lid latch has a rotatable clock cylinder accessible through an escutcheon having a pivotally mounted cover. A detent is effective upon movement of the cover to the open position to hold the cover in the open position. The detent is released in response to rotation of the lock cylinder so that the cover is moved to the closed position by a bias spring. A gear is rotatably mounted on the escutcheon and has gear teeth meshing with gear teeth displayed on the cover in an arcuate path about the pivot axis of the cover so that pivotal movement of the cover rotates the gear. A viscous damper is associated with the gear to retard rotary movement of the gear and thereby retard the closing movement of the cover in a time delayed fashion which gives the operator time to withdraw the key and his fingers from proximity with the spring biased cover prior to the cover reaching the closed position.

REFERENCES:
patent: 2036541 (1936-04-01), Ringseis
patent: 2213814 (1940-09-01), Jacobi
patent: 2388228 (1945-10-01), Johnstone
patent: 3898824 (1975-08-01), Borlinghaus
patent: 3930391 (1976-01-01), Borlinghaus
patent: 4192161 (1980-03-01), Borlinghaus
patent: 4426752 (1984-01-01), Nakayama
patent: 4468836 (1984-09-01), Omata
patent: 4527675 (1985-07-01), Omata et al.
patent: 4586355 (1986-05-01), Lee et al.
patent: 4597274 (1986-07-01), Coscia et al.
patent: 4614004 (1986-09-01), Oshida
patent: 4638528 (1987-01-01), Omata
patent: 4674308 (1987-06-01), Peters
patent: 4723428 (1988-02-01), Yamaguchi

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