Importance

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Abstract

A tilt window balance shoe assembly is used with a double hung window and provides three directional locking. The balance shoe assembly comprises a slide block, a center cam, a pair of brake shoes, and a locking lug. The slide block has a head portion with a retention slot for a balance mechanism and a generally cylindrical-shaped hole which receives the center cam. The slide block also has side apertures extending to the hole and a receiving opening in a back face of the slide block and extending to the hole. The center cam has a slot well, cam flats and cam rounds. The slot well receives a terminus of a pivot bar attached to the window. The brake shoes which are positioned in the side apertures and the locking lug which is positioned in the receiving opening are in operable association with the center cam. Tilting of the window about its lower pivot point causes the pivot bar to rotate the center cam. Upon rotation of the center cam, the brake shoes and locking lug move from a window moving position to a window locked position wherein the brake shoes and the locking lug frictionally engage the window frame of the window. The resultant three directional locking force is very effective for preventing the sash window from unintentionally sliding in the window frame.

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First Claim