Stoves and furnaces – Dampers – Stovepipe
Patent
1984-07-27
1985-10-01
Yeung, James C.
Stoves and furnaces
Dampers
Stovepipe
98 48, 126312, 236101D, F23J 300
Patent
active
045439419
ABSTRACT:
A valve is provided for installation in the auxillary duct of a furnace stack pipe. The valve prevents flow of air through the damper plate in the auxillary duct when the furnace is switched off. The valve is controlled by a temperature responsive bimetallic strip which is impinged upon by flue gases to move the valve to an open position upon the furnace being ignited and producing combustion gases.
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