Fenestration unit with sash retention
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United States of America Patent
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May 16, 2017
Issued Date -
N/A
app pub date -
Mar 17, 2014
filing date -
Mar 15, 2013
priority date (Note) -
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Abstract
A fenestration unit, such as a window, having an upper sash and a lower sash can be configured to permit separate and independent movement of the upper sash and the lower sash when desired, while restraining the upper sash from movement caused by movement of the lower sash. A fenestration unit having a single movable sash can also be configured to provide securement of the single movable sash against undesired vertical movement.
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