Lock having a quick unlocking function

Details Lock having a quick unlocking function Lock having a quick unlocking function

2005-02-08

2005-02-08

Gall, Lloyd A. (Department: 3676)

Locks

Special application

For closures

C070S134000, C070S352000, C292S036000, C292S179000, C292S150000, C292S333000

Reexamination Certificate

active

06851287

ABSTRACT:
A lock includes a quick unlocking device and a secondary locking device. Thus, when the inner handle is rotated, the latch bolt and the dead bolt are unlocked synchronously by operation of the quick unlocking device, so that the door plate can be opened rapidly, thereby facilitating the user opening the door during the emergency condition. In addition, when the locking block is pressed inward, the locking stud of the locking block is locked in the locking hole of the locking seat to lock the control knob on the locking seat without rotation, such that the dead bolt is fixed by the control knob, thereby forming a secondary locking effect to achieve the anti-theft purpose.

REFERENCES:
patent: 1721676 (1929-07-01), Thelenz
patent: 5027625 (1991-07-01), Krachten
patent: 5267457 (1993-12-01), Sorensen et al.
patent: 5421074 (1995-06-01), Moore
patent: 5469723 (1995-11-01), Litwin et al.
patent: 5950467 (1999-09-01), Dong
patent: 6302456 (2001-10-01), Errani
patent: 6651466 (2003-11-01), Shih
patent: 6684669 (2004-02-01), Talpe

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