Fire and smoke rated fabric door
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United States of America Patent
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Sep 15, 2015
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N/A
app pub date -
Apr 17, 2013
filing date -
Feb 24, 2011
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Abstract
A vertically coiling door assembly that is used for emergency egress. Upon notice of a predefined alarm state, after a delay the door deploys by gravity, stopping upon contact with an obstruction. The door may be lifted at any time without power and after a set amount of lift powered movement is triggered moving the door to a preset height, pausing the door at that height, and then resuming gravity deployment. In the total absence of power the door may still be lifted, with resumption of gravity deployment upon removal of the lifting force.
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Family
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