Control for furnace flue damper

Details Control for furnace flue damper Control for furnace flue damper

1979-05-24

1981-04-28

Tapolcai, Jr., William E.

Combustion

Timer, programmer, retarder or condition responsive control

Of or by exhaust damper or exhaust pump

126235R, 236 1G, 137 98, F23N 302

Patent

active

042642965

ABSTRACT:
A pivotal vane carrying member secured to the damper for a furnace flue normally maintains the damper by gravity in an open position. An electric motor driven air blower discharges air against the vanes of the pivotal member to pivot the latter and damper to a closed position when no fuel is supplied to the furnace. Otherwise power for the blower motor is shut off and the pivotal member returns by gravity to its normal flue-open position.

REFERENCES:
patent: 1813395 (1931-07-01), Fraser
patent: 3090558 (1963-05-01), Vaughn
patent: 4076171 (1978-02-01), Swenson
patent: 4182483 (1980-01-01), Swenson
patent: 4189296 (1980-02-01), Hayes

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