Non-rotational lock chassis assembly

Details Non-rotational lock chassis assembly Non-rotational lock chassis assembly

2006-01-24

2006-01-24

Estremsky, Gary (Department: 3676)

Closure fasteners

Operators with knobs or handles

C292S357000, C292SDIG005

Reexamination Certificate

active

06988751

ABSTRACT:
The invention is an anti-rotational lock chassis for a retractable latch. The lock chassis includes a first hub having at least one flat side and a second hub with a thread exterior. An internally threaded plate receives the externally threaded hub. The flat-sided plate receives the flat-sided hub. Each plate is positioned between a spring cage assembly and the chassis. The spring cage assembly includes a drive spindle that rotates to extend and retract the latch to secure access through a door. A connecting element interconnects the spring case assemblies. Cutouts in each plate engage the connecting elements, thereby constraining the plates and chassis from rotating inside the door.

REFERENCES:
patent: 2764445 (1956-09-01), Cerf
patent: 3985008 (1976-10-01), Hart
patent: 5265924 (1993-11-01), Kim
patent: 5481890 (1996-01-01), Millman
patent: 5590555 (1997-01-01), Kester et al.
patent: 5732578 (1998-03-01), Kang
patent: 6279360 (2001-08-01), Shen
patent: 6302457 (2001-10-01), Shen
patent: 6619710 (2003-09-01), Hwang

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