US 7,000,957 B2 · Locking window device

Abstract

An improved locking device for sash-type windows is provided. The locking device includes a keeper defining an internal or keeper cavity, a housing defining first and second tier-recess combinations, a solid cam rotatively positioned within the first tier-recess combination, and a washer positioned between the housing interior and the flat top portion of the cam. The second tier-recess combination, or keeper recess, is defined by at least a portion of the housing that engages the keeper, such that the keeper is nestable within (wholly or partially enclosed by) the second tier-recess combination. Attempting to force the cam past the keeper cavity when the locking mechanism is locked results in the distribution of the force across the surface area of the keeper recess. The first tier-recess combination further defines an aperture for mounting a handle to engage and operate the cam.

Claims30

Dependent claims

A locking device, comprising:

a keeper defining an internal cavity;
a housing defining an interior and an exterior, said housing constructed to form a keeper recess to fit enclosably over at least part of said keeper;
a cam rotatively positioned within said housing;
and
a washer positioned between said cam and said interior of said housing;
wherein said keeper selectively engages the keeper recess within said housing;
and
wherein said cam selectively engages said keeper within the internal cavity of said keeper.

5 more elements

Dependencies are inferred from the claim text.

Locking window device

Life of this patent

Locking window device

Life of this patent

Abstract

Claims30