Failsafe protection damper for a fireplace furnace

Details Failsafe protection damper for a fireplace furnace Failsafe protection damper for a fireplace furnace

1979-11-14

1981-05-05

Yeung, James C.

Stoves and furnaces

Dampers

Electric

126122, 237 51, F23L 300

Patent

active

042652189

ABSTRACT:
A fireplace furnace includes an outer housing disposed about a firebox to define a heat chamber therebetween. A blower is associated with an air intake opening through a lower portion of the heat chamber for forcing air therethrough. Air exits from the heat chamber through first and second heat outlets. The second heat outlet includes a generally vertical duct with a damper pivotally supported therein for movement between a generally horizontal closed position and an upright open position. The damper is biased to its closed position and is opened against the urging of the biasing mechanism by forced air flow through the heat chamber by the blower with the result that the damper is automatically closed by the biasing mechanism when power to the blower is cut off.

REFERENCES:
patent: 2231258 (1941-02-01), Elmore
patent: 2480596 (1949-08-01), Mueller
patent: 4108238 (1978-08-01), Vary
patent: 4138062 (1979-02-01), Graden
patent: 4179065 (1979-12-01), Zung

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