Independent biasing means for automatic flue damper

Details Independent biasing means for automatic flue damper Independent biasing means for automatic flue damper

F - Mech Eng,Light,Heat,Weapons

23

N

110/69

F23N 3/04 (2006.01) F23L 11/00 (2006.01) G05D 23/275 (2006.01)

Patent

CA 1087031

ABSTRACT OF THE DISCLOSURE For a vent or flue damper of the type in which the damper is closed by an electrically energized actuator when the furnace is off and the actuator has first biasing means to open the damper when the actuator is deenergized, a second biasing means such as a torsion spring, independent of the first biasing means, is associated directly with the damper shaft and is adapted to always move the damper to an open position in the absence of the actuator.

315301

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