Fluid handling – Ambient condition change responsive – Atmospheric
Patent
1979-09-21
1981-10-20
Chambers, A. Michael
Fluid handling
Ambient condition change responsive
Atmospheric
49 2, 98 1, 137601, 251251, F16K 1738
Patent
active
042954860
ABSTRACT:
A novel operator is disclosed for use in combination with a butterfly fire and volume control damper, which operator may be concealed behind a standard concentric diffuser. Only a screwdriver aperture need be provided in the diffuser to facilitate the volume adjustment of the butterfly damper. In response to excessive heat in the vicinity of the damper, the blades of the damper will move to their fully closed position. Once activation conditions have passed, the damper may be reset by replacing the releasing device which separated in response to said heat.
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Chambers A. Michael
Prefco Products, Inc.
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