Air duct closure device

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

Patent

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Details

F24F 13/10 (2006.01) F24F 11/02 (2006.01)

Patent

CA 2086303

Abstract of the Disclosure Title of the Invention: AIR DUCT CLOSURE SYSTEM An inflatable bag of flimsy plastic material is disclosed, which is placed in the air duct of a house or other building. The bag is coupled to a fan and electric motor. The device is placed near the duct outlet register, where it can be easily inserted and retrieved. The motor is operated, to inflate/deflate the bag, by a thermostat in the room. Radio connection between the thermostat and the motor is disclosed. When the bag is deflated, the duct is open, and treated air from acentral unit can then enter the room. The bag takes air from inside the duct, and static pressure inside the duct holds the bag inflated; when the bag is deflated, the air intake faces away from velocity of the flowing air, so the flowing air does not tend to inflate the bag. Battery operation of the motor is disclosed.

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