Locks – Special application – For closures
Reexamination Certificate
2008-10-19
2010-12-28
Gall, Lloyd A (Department: 3673)
Locks
Special application
For closures
C070S108000, C292S034000, C292S036000
Reexamination Certificate
active
07856857
ABSTRACT:
A door lock of key-driven transmission structure which is comprised of a case, a swing arm, a first link bar and a second link bar, whereof the first and second link bars and a lock-bolt structure on the case can be driven by the swing arm to open or close lock. A first transmission piece is driven when the lock-bolt structure is actuated, and an actuator is driven by the first transmission piece to further drive the two top and bottom pull rods which further drive the two top and bottom lock-bolts to extend outward for locking, thereby to reach a combining action between the lock-bolt structure as well as the top and bottom lock-bolts. The lock-bolt structure is further through linking with a labor saving component installed on the second link bar to achieve the labor saving and easy operation effects.
REFERENCES:
patent: 6266981 (2001-07-01), von Resch et al.
patent: 7707862 (2010-05-01), Walls et al.
patent: 7752875 (2010-07-01), Constantinou et al.
patent: 2003/0159478 (2003-08-01), Nagy
patent: 2004/0107746 (2004-06-01), Chang
patent: 2004/0261475 (2004-12-01), Artsiely
patent: 2005/0166647 (2005-08-01), Walls et al.
patent: 2009/0266120 (2009-10-01), Tien
Gall Lloyd A
Imperial Hardware Taiwan, Ltd.
Wang Li K.
Wang Law Firm, Inc.
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