Spring cover friction system for sash balance

Details Spring cover friction system for sash balance Spring cover friction system for sash balance

E - Fixed Constructions

05

F

108/45.1

E05F 1/00 (2006.01) E05F 1/08 (2006.01)

Patent

CA 1317156

- 8 - TITLE SPRING COVER FRICTION SYSTEM FOR SASH BALANCE ABSTRACT An extruded resin jamb liner (10) has a spring cover (12) with a longitudinal slit (15) in which a platform (20) moves for balancing a sash. Platform (20) is a single piece resin part having a spring connector (30) inside the spring cover, a neck (24) extending through the slit, and a sash support (25) outside the spring cover. The platform also has inside and outside friction surfaces (26 and 27) respectively engaging inward and outward facing surfaces of the spring cover on opposite sides of the slit to provide a load-related frictional resistance against vertical movement of the platform in the slit.

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