Patent ID: 6119398
Filing Date: 2000-09-19
Classification: E05D,E05Y

Abstract:
A tilt window balance shoe assembly for locking a window within a window frame upon rotation of a pivot bar mounted on the window, said balance shoe assembly comprising:(a) a rigid slide block having (i) a head portion with at least one retention slot to receive and hold a balance mechanism for the window, (ii) a horizontally approximately centered hole, said horizontally approximately centered hole extending from a front face of said slide block to a back face of said slide block (iii) a side aperture in each side of said slide block, each said side aperture extending to the horizontally approximately centered hole, and (iv) an opening in the back face of said slide block extending to the horizontally approximately centered hole;(b) a center cam having a generally cylindrically shaped outer surface and positioned in the horizontally approximately centered hole of the slide block, said center cam having a front face with a slot well to receive the pivot bar, said outer surface including brake shoe cam flats, a locking lug cam flat, brake shoe cam rounds and a locking lug cam round;(c) two brake shoes, with each one of the brake shoes slidably positioned in a respective one of the side apertures of the slide block, and said two brake shoes in operable association with the brake shoe cam rounds of the center cam for exerting a locking force against the window frame; and(d) a locking lug positioned in the opening of the slide block and in operable association with the locking lug cam round of the center cam for exerting a locking force against the window frame,wherein when said brake shoes and said locking lug are engaged with said brake shoe cam flats and said locking lug cam flat, respectively, said brake shoes and said locking lug are in a free window movement position and when said brake shoes and said locking lug are engaged with said brake shoe cam rounds and said locking lug cam round, respectively, said brake shoes and said locking lug are in a locking position for locking the window within the window frame.