Side-Load, Constant Force Window And Window Balance Assembly

摘要

A constant force window balance assembly for a side-load, hung window is disclosed. A side rail of a window sash disposed in a jamb channel has a first opening. The balance assembly is installed in the jamb channel and engages the sash at the first opening to support the sash with a counterbalance force. A carrier of the balance assembly includes a body having a sash engaging seat located at an upper end that directly engages the first opening in the side wall of the side rail of the window sash. The carrier can also include a lip located at an inner side of the carrier and extending upwardly from the sash engaging seat. The carrier can also include a projection at an upper end of the body to engage a retaining aperture in an uncurled end portion of a curl spring in a pre-installed configuration of the window balance.

主权项

1. A side-load, hung window assembly comprising:
a window frame comprising a window jamb defining a jamb channel, a window sash disposed in the window frame and comprising a side rail, the side rail comprising a side wall having a first opening; a window balance assembly installed in the jamb channel, the window balance assembly engaging the window sash to support the window sash with a counterbalance force, the window balance assembly comprising a carrier, a curl spring, and a mounting device; wherein the carrier comprises a body having a sash engaging seat located at an upper end that directly engages the first opening in the side wall of the side rail of the window sash; wherein a curled portion of the curl spring is housed in the carrier and an uncurled end portion of the curl spring extends from the carrier on an outer side of the carrier that is opposite to the window sash, the uncurled end portion of the curl spring being secured to the jamb channel by the mounting device; wherein the carrier comprises a support that engages the curled portion of the curl spring, the support comprising bearing surface that generally conforms to at least a portion of a shape of the curled portion of the curl spring.