Locks – Operating mechanism – Key
Patent
1996-04-08
1998-03-03
Gall, Lloyd A.
Locks
Operating mechanism
Key
70417, 70449, 70451, 70452, 292147, 292357, E05B 904
Patent
active
057222738
ABSTRACT:
A latch bolt operating device is adapted for use with a latch bolt unit that is installed in a door panel, and includes exterior and interior operating units. The exterior operating unit includes a key-operated plug-and-cylinder lock assembly, and an exterior housing having an outer annular cover, an inner annular cover and an annular shield. The outer annular cover has a rear end portion formed with a first annular shoulder. The inner annular cover is received in the outer annular cover and has a rear end portion formed with a second annular shoulder. The annular shield extends into the rear end portion of the inner annular cover and has a peripheral portion which engages the second annular shoulder when the latter is bent. The interior operating unit includes a torque bar and an interior housing. The torque bar can be positioned releasably in a first position corresponding to an extended position of a bolt of the latch bolt unit and a second position corresponding to a retracted position of the bolt.
REFERENCES:
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patent: 4073172 (1978-02-01), Schlage
patent: 4338804 (1982-07-01), Solovieff
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patent: 5150592 (1992-09-01), Lin
patent: 5199285 (1993-04-01), Lin
patent: 5216910 (1993-06-01), Lin
patent: 5540070 (1996-07-01), Adelmeyer
Don Lan-Kun
Gao Sheen-Youl
Kuo Ching-Chuan
Lin San-Yi
Wu Tong-Pei
Gall Lloyd A.
Tong Lung Metal Industry Co. Ltd.
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