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Class Information
Number: 110/163
Name: Furnaces > Draft regulators > Damper
Description: Devices movable in the path of the products of combustion for regulating the cross sectional area of said path or for closing one path in order to pass them through another or longer course.

Patents under this class:
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Patent Number Title Of Patent Date Issued
4273097 Automatic fireplace damper Jun. 16, 1981
4267819 Device for generating an electric output signal in response to the positioning of a mechanical member May. 19, 1981
4263890 Flue restrictor Apr. 28, 1981
4262608 Method and apparatus for powered flue products exhaust and preheated combustion air supply Apr. 21, 1981
4259943 Fuel economizer Apr. 7, 1981
4254759 Automatic damper means and controls therefor Mar. 10, 1981
4237854 Damper construction and a method of cooling a damper Dec. 9, 1980
4191171 Draft hood and damper assembly for fuel fired heating apparatus Mar. 4, 1980
4164211 Damper assembly Aug. 14, 1979
4163694 Heating wall for coke ovens Aug. 7, 1979
4143811 Gas flow controlled furnace flue damper Mar. 13, 1979
4103708 Ventilated poppet damper Aug. 1, 1978
4096038 Method and apparatus for operating a calciner under a pressure differential Jun. 20, 1978
4087045 Stack damper control safety interlock with lockout prevention May. 2, 1978
4084743 Interlock arrangement for a stack damper control Apr. 18, 1978
4046318 Automatic boiler damper Sep. 6, 1977
4027654 Damper assembly for high temperature or corrosive gases Jun. 7, 1977
4017024 Stack damper control arrangement Apr. 12, 1977
3996864 Furnace damper and support Dec. 14, 1976
3987785 Energy saving device Oct. 26, 1976
3941067 Barometric draft regulator Mar. 2, 1976

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