Compact sliding sash lock

Closure fasteners – Bolts – Sliding

Reexamination Certificate

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Details

C292S170000, C292SDIG020, C292SDIG047

Reexamination Certificate

active

07731251

ABSTRACT:
A sash lock for use with door and window is provided. The lock has a base housing shaped into a laterally extending crib to contain a partially protruding plunger sliding under a forward bias, a large button block that occupies a substantial area at the top of the lock to allow for a unique squeeze release of the plunger and translates in a perpendicular plane with respect to the plunger movement under an expansive bias for normally pushing the button block away from the base housing in cooperation with the biased counteraction of the cam surfaces of the plunger but yielding to a manual depression to activate the plunger through a cam engagement, and a top housing fastened to the base housing to enclose the plunger and button block. The plunger has cam surfaces at a rear end facing forwardly and a beveled lip portion at a front end while the button block has a beveled surface facing the cam surfaces of the plunger. The sash lock further comprises two identical holes formed in the bottom of base housing and a separate keeper for interlocking with the base housing.

REFERENCES:
patent: 6669047 (2003-12-01), Wooderson et al.
patent: 6846025 (2005-01-01), Sclater et al.
patent: 7118142 (2006-10-01), Xu
patent: 7165791 (2007-01-01), Rebel et al.
patent: 7407199 (2008-08-01), Richardson
patent: 2008/0179896 (2008-07-01), Chung

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