Patent ID: 7047693

Claim:
A counterbalance system for a vertically operating window comprising: a mounting bracket; a plurality of coil springs mounted to said mounting bracket that allow said coil springs to extend from said mounting bracket and generate a force; a counterbalance connector attached to a sash of said vertically operating window; at least one connector that connects a selected number of said plurality of coil springs to said counterbalance connector, said selected number being selected to provide a desired counterbalance force for said sash; a pulley on which said connector travels, said pulley disposed to engage said connector between said sash and said plurality of coil springs; a pivot pin connected to said mounting bracket and mounted in a weight pocket opening in said window frame so that said mounting bracket can be swiveled out of said weight pocket to a position where said counterbalance connector can be connected to said coil springs, and back into said weight pocket to a recessed position which allows said sash to be operated in said window frame.