Patent ID: 7165359

Claim:
A balance shoe comprising a balance shoe housing, shaped to move in a window frame channel, the window channel having at least a base section and two side sections extending from the base section, said balance shoe housing having pivot member, which is adapted to engage a pivot bar that is attached to a window sash such that when a window is tilted, the pivot member rotates and forces a support plate against the base section of the window channel, said pivot member being generally circular with a flat upper portion said upper portion having a first raised member and a second raised member, said first and second raised members contacting first and second recessed engagement portions on an underside of the support plate, said engagement portions of said support plate comprising a first diagonal portion, a second diagonal portion, and a flat portion in between said diagonal portions, said first and second raised members extending said support plate outwardly when said pivot member is rotated and said first and second raised members are no longer contacting said recessed portions.