Door locking device

Details Door locking device Door locking device

2005-02-22

2005-02-22

Walsh, John B. (Department: 3676)

Locks

Special application

For closures

C070S210000, C070S224000, C070S480000, C070S481000

Reexamination Certificate

active

06857300

ABSTRACT:
A locking device (1) is provided for a door latch in which a latch bar of the door latch mechanism is turnable to retract a latch bolt of the latch mechanism. A locking means is adapted to be actuated in response to turning of a door handle (3) for the latch mechanism in anti-clockwise direction so as to lock the latch bolt in its extended latching position. It is released by turning the handle in the clockwise direction.

REFERENCES:
patent: 1688240 (1928-10-01), Keigwin
patent: 4720127 (1988-01-01), Doolan
patent: 4900073 (1990-02-01), Doolan
patent: 4920773 (1990-05-01), Surko, Jr.
patent: 5077994 (1992-01-01), Trull et al.
patent: 5433495 (1995-07-01), Uffner
patent: 5651280 (1997-07-01), Park
patent: 3840183 (1990-05-01), None

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