Multi-coil spring window counterbalance assembly

Details Multi-coil spring window counterbalance assembly Multi-coil spring window counterbalance assembly

2006-05-23

2006-05-23

Redman, Jerry (Department: 3634)

Movable or removable closures

With means mounting closure for reciprocation

With counterbalance

C016S197000, C049S506000

Reexamination Certificate

active

07047693

ABSTRACT:
Disclosed is a multi-coil spring assembly that is mounted in the weight pocket of a vertically operating window. The multi-coil spring assembly allows the user to connect any desired number of coil springs to the counterbalance connector to provide the desired amount of counterbalance force to the sash of a vertically operating window. The multi-coil spring assembly rotates into an interior portion of the window to allow simple and easy connection to the counterbalance connector and then retracts into the weight pocket in a recessed position for normal operation.

REFERENCES:
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patent: 2002/0104189 (2002-08-01), Braid et al.
patent: 2002/0116786 (2002-08-01), Guillemet et al.
Doug Wegman, “The Basics of Window Balance Selection,” Window & Door, May 2004, pp. 42-49.
Steve Jordan, “Spring Balances Bounce Back,” Old-House Journal, Mar./Apr. 2004, pp. 33-36.
Product Design & Development, Inc, “Product Design's Updated 1997 Catalog”.

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