Window sash counterbalance with independently operable sashes
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United States of America Patent
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Feb 14, 2017
Grant Date -
Jan 7, 2016
app pub date -
Aug 17, 2015
filing date -
Dec 3, 2012
priority date (Note) -
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Abstract
A window, with a hybrid sash counterbalance and assist mechanism, includes a frame having upper and lower sashes slidable within the frame. A sash coupling element extends between the upper and lower sashes. The hybrid sash counterbalance and assist mechanism is coupled with the sash coupling element. The window with the hybrid sash counterbalance and assist mechanism is operable in a sash counterbalance mode and in an independent sash movement mode. In the sash counterbalance mode, movement of the upper or lower sash causes converse movement of the lower or upper sash through the sash coupling element. In the independent sash movement mode, one of the upper and lower sashes is held static while the other of the lower or upper sashes is moved.
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