Window sash balance

Details Window sash balance Window sash balance

E - Fixed Constructions

06

B

E06B 3/52 (2006.01) E05D 13/00 (2006.01) E05D 15/18 (2006.01) E05F 1/08 (2006.01)

Patent

CA 2067437

A spring balance for counteracting the weight of heavy window sashes includes both a torsion spring and a tension spring. The two springs are separated by a rigid tube. One end of each spring is connected to an end of the rigid tube. A spiral member engages a follower carried by the other end of the torsion spring and includes a stop along its length for engaging an anchor carried by the other end of the tension spring. The spiral member can be attached by conventional means to a shoe or other connection to the window sash.

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