Patent ID: 8132290
Filing Date: 2012-03-13
Classification: E05D,E05Y,Y10T

Abstract:
1. A balance assembly for use in a sliding sash window, said balance assembly comprising: (a) a housing having an upper end and a lower end; (b) a pulley arrangement where at least a portion of said pulley arrangement is located within said housing; said pulley arrangement comprising one or more pulleys and an interconnection means that interacts with said one or more pulleys; said interconnection means having a first end and a second end, said first end being fixed to a portion of said pulley arrangement; (c) a spring means with a first end and a second end, wherein said first end of said spring means biases at least a portion of said pulley arrangement relative to said housing; (d) a shoe member, wherein said shoe member has an orifice and one or more openings, said shoe being attached to said housing such that said shoe is capable of rotating, relative to said housing, from a first position to a second position; (e) a hook means, said hook means comprising a first end hook and a second end hook, said first and second end hooks being rotatably connected to said shoe, said hook means further comprising a cross arm, said first and second hook ends being connected by said cross arm, at least a portion of said cross arm comprising one or more helical turns, said hook means providing said attachment of said shoe to said housing, and (f) a cylindrically shaped cam having a top end and a bottom end, and an opening in at least a portion of said cam; said cam being installed in said orifice of said shoe such that said cam is capable of pivoting within said shoe.