Retrofittable energy conserving damper

Details Retrofittable energy conserving damper Retrofittable energy conserving damper

1980-12-16

1982-10-12

O'Connor, Daniel J.

Stoves and furnaces

Hot-air furnaces

Feeding air

98116, 126285R, 126290, F24H 300, F23L 300

Patent

active

043533493

ABSTRACT:
The damper is a hollow sheet metal duct-like device of generally rectangular cross section, and is adapted to fit over the combustion air intake of a furnace blower so that the furnace must obtain its combustion air through said damper. A trap door type valve in the lower surface of device automatically opens in response to the suction of the blower to admit combustion air, and automatically closes due to gravity when said blower is de-energized, to cut off the air supply to the furnace combustion chamber when the furnace is not operating.

REFERENCES:
patent: 891900 (1908-06-01), Belvin
patent: 1830036 (1931-11-01), Mortimer
patent: 2285746 (1942-06-01), Sabins
patent: 2448891 (1948-09-01), Katz
patent: 2823600 (1958-02-01), Cole
patent: 3204870 (1965-09-01), Dibert
patent: 3249038 (1966-05-01), Johnson
patent: 3869243 (1975-03-01), Creuz
patent: 4038963 (1977-08-01), Dingwall
patent: 4184837 (1980-01-01), Manning
patent: 4292950 (1981-10-01), Schossow
patent: 4306538 (1981-12-01), Frieber

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