Remotely trippable and resettable damper

F - Mech Eng,Light,Heat,Weapons – 24 – F

Patent

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F24F 13/14 (2006.01) F24F 11/02 (2006.01)

Patent

CA 2139298

A fail-safe closed damper for installation in a system of ducts. The damper includes at least one damper blade connected to a spring-loaded shaft. A power- actuated unit is employed to disengage a coupling which interconnects the spring-loaded shaft to an operating linkage. The use of the power-actuated unit ensures that the damper will be tripped at the appropriate predetermined temperature and will not be affected by the large frictional forces imparted on the components of the damper by the biasing spring or by such external factors as dust, humidity and dirt. The damper also employs a sensor which may be mounted at any remote location within the ventilation system. Alternatively, a plurality of interconnected sensors capable of providing additional sensing capability may be employed.

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