Fluid actuated damper control apparatus

Details Fluid actuated damper control apparatus Fluid actuated damper control apparatus

1979-10-29

1981-05-12

Dority, Jr., Carroll B.

Combustion

Timer, programmer, retarder or condition responsive control

Of or by exhaust damper or exhaust pump

236 1G, F23N 300

Patent

active

042669294

ABSTRACT:
An apparatus for opening and closing the draft hood discharge opening and vent and fuel line of a fluid fuel-fired heating device such as a domestic water heater. The disclosed apparatus includes a diaphragm-type expansible chamber fluid motor assembly mechanically linked to a damper assembly such that when the heating devices call for heating, the supply of pressurized fuel acts to actuate the motor for opening the damper assembly. The motor assembly also has a pressure output line which operates a fail-safe type of diaphragm valve for controlling flow. This prevents burner operation until after the dampers are open. Additionally, when the supply of fuel is terminated, the motor assembly does not close the damper assembly until after the diaphragm valve stops fuel to the burner.

REFERENCES:
patent: 1813395 (1931-07-01), Fraser
patent: 2263817 (1941-11-01), Ourusoff
patent: 2296410 (1942-09-01), Wetzsteon
patent: 4076171 (1978-02-01), Swenson
patent: 4182483 (1980-01-01), Swenson

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