Block and tackle window balance with bottom guide roller

Details Block and tackle window balance with bottom guide roller Block and tackle window balance with bottom guide roller

2009-09-10

2011-10-25

Mah, Chuck Y. (Department: 3677)

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Sash balances

Spring

C016S193000, C049S446000

Reexamination Certificate

active

08042227

ABSTRACT:
Disclosed are apparatus for a block and tackle window balance to be incorporated in single and double hung window assemblies. In one embodiment the block and tackle window balance includes a roller secured within a bottom guide to increase range of travel of a window sash.

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