Air flow controller and fire damper in an air flow duct
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 31, 2006
Grant Date -
Mar 25, 2004
app pub date -
Nov 29, 2001
filing date -
Dec 1, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A fire damper in an air duct (2) is formed by a flap (12) which in its closed position bears on a flange (6) which extends inward from the duct wall, to form a seal. The flap (12) is biased to the closed position and held open by a cable (24) which is gripped by a releasable mechanism, such as a ball clutch. The release is triggered by a fusible cartridge (34) which extends into the duct (2).
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