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Class Information
Number: 126/285B
Name: Stoves and furnaces > Dampers > Electric
Description:










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8371286 Mechanical damper control Feb. 12, 2013
6644957 Damper control device Nov. 11, 2003
6439877 Control device for a gas-fired appliance Aug. 27, 2002
6213117 Motorized insulated damper assembly for furnace systems Apr. 10, 2001
5911217 Internally mounted flue damper with exterior free-standing damper drive Jun. 15, 1999
5609522 Combination damper and chimney cap apparatus Mar. 11, 1997
5500508 Oven, particularly with an apparatus for pyroltic self cleaning Mar. 19, 1996
5292063 Damper actuator Mar. 8, 1994
5141152 Flue gas closure system Aug. 25, 1992
5056500 Furnace damper means Oct. 15, 1991
4909239 Fireplace power cap Mar. 20, 1990
4846400 Method of and apparatus for automatic damper control Jul. 11, 1989
4650154 Blanking cover for pipe Mar. 17, 1987
4635610 Hot air circulating oven range using shape memory alloy Jan. 13, 1987
4608961 Exhaust damper control Sep. 2, 1986
4575257 Thermal shock chamber Mar. 11, 1986
4570847 Flue damper control system Feb. 18, 1986
4557185 Solenoid operated exhaust air damper Dec. 10, 1985
4545363 Ventilation damper control system Oct. 8, 1985
4450344 Damper drive system in a combined microwave and electric heater oven May. 22, 1984
4421096 Vent damper drive Dec. 20, 1983
4413774 Direct drive air register damper Nov. 8, 1983
4413613 Sleeve damper apparatus Nov. 8, 1983
4403942 Self-checking safety switch control circuit Sep. 13, 1983
4404613 Double switch fuse assembly Sep. 13, 1983
4389014 Vent damper with emergency manual override Jun. 21, 1983
RE31256 Automatic damper means and controls therefor May. 31, 1983
RE31112 Automatic flue damper Dec. 28, 1982
4347832 Controlled air intake apparatus for furnaces and the like Sep. 7, 1982
4290552 Damper control mechanism Sep. 22, 1981
4281638 Damper for solar heating systems and the like Aug. 4, 1981
4274392 Controlled air intake apparatus for furnaces and the like Jun. 23, 1981
4273097 Automatic fireplace damper Jun. 16, 1981
4269166 Stack damper valve May. 26, 1981
4267819 Device for generating an electric output signal in response to the positioning of a mechanical member May. 19, 1981
4265394 Flue damper control system May. 5, 1981
4262652 Vent damper drive Apr. 21, 1981
4256257 Automatic chimney cap Mar. 17, 1981
4254759 Automatic damper means and controls therefor Mar. 10, 1981
4251024 Automatic vent damper Feb. 17, 1981
4245779 System for increasing heating efficiency Jan. 20, 1981
4240397 Fuel saver oven Dec. 23, 1980
4237855 Flue throttle Dec. 9, 1980
4205783 Independent biasing means for automatic flue damper Jun. 3, 1980
4193541 Damper latch Mar. 18, 1980
4185770 Automatic flue damper control system Jan. 29, 1980
4157785 Safety connection for a retrofit flue damper Jun. 12, 1979
4155699 Heat saving device for space heating furnace May. 22, 1979
4143811 Gas flow controlled furnace flue damper Mar. 13, 1979
4138060 Automatic draft control Feb. 6, 1979

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