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Class Information
Number: 236/1G
Name: Automatic temperature and humidity regulation > Miscellaneous > Heat conserving damper control
Description:










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8632017 Damper control system Jan. 21, 2014
8385066 Flow control device and cooled electronic system employing the same Feb. 26, 2013
8311703 Control system Nov. 13, 2012
8297524 Damper control system Oct. 30, 2012
7699237 Method for controlling the exhaust flow from a cooking chamber of a baking oven Apr. 20, 2010
7003377 Controlling cooling air intake for air cooled equipment Feb. 21, 2006
6755138 Ventilation system and method Jun. 29, 2004
6749124 Damper control device Jun. 15, 2004
6681761 Exhaust damper system for asphalt heating device Jan. 27, 2004
6644957 Damper control device Nov. 11, 2003
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
5709173 Method and apparatus for controlling combustion air in a boiler plant Jan. 20, 1998
5695116 Thermally activated vent damper Dec. 9, 1997
5555876 Chimney safety and control system Sep. 17, 1996
5503550 Gas log fireplace system Apr. 2, 1996
5363025 Actuator employing unidirectional motor for bidirectional rotational positioning Nov. 8, 1994
5346126 Device for controlling heating efficiency of water heater Sep. 13, 1994
5292063 Damper actuator Mar. 8, 1994
5186385 Thermally activated vent damper Feb. 16, 1993
5141152 Flue gas closure system Aug. 25, 1992
5082172 Thermally activated vent damper Jan. 21, 1992
5071064 Shape memory actuator smart connector Dec. 10, 1991
5039006 Home heating system draft controller Aug. 13, 1991
4979672 Shape memory actuator Dec. 25, 1990
4942348 Electronic air register controller Jul. 17, 1990
4919329 Thermally activated automatic damper and damper operator Apr. 24, 1990
4838481 Draft control arrangement for venting of combustion apparatus Jun. 13, 1989
4834282 Device for use with flue dampers May. 30, 1989
4711626 Damper mounting assembly Dec. 8, 1987
4705928 Damper drive in microwave heating appliance Nov. 10, 1987
4664096 Oil and gas water heater May. 12, 1987
4619602 Fail safe automatic flue damper mechanism Oct. 28, 1986
4587706 Thermally responsive damper assembly having interfitting parts and method May. 13, 1986
4570847 Flue damper control system Feb. 18, 1986
4550874 Means controlling a flue damper Nov. 5, 1985
4538980 Positive opening damper for combustion appliance Sep. 3, 1985
4529120 Heat generating system for multi-purpose usages and recovery of products of combustion Jul. 16, 1985
4460121 Thermally controlled vent damper Jul. 17, 1984
4450344 Damper drive system in a combined microwave and electric heater oven May. 22, 1984
4439139 Furnace stack damper control apparatus Mar. 27, 1984
4437454 Mechanical draft controller with vent damper Mar. 20, 1984
4434781 Thermally efficient barbecue grill Mar. 6, 1984
4426993 Valve for appliance combustion air inlet Jan. 24, 1984
4421096 Vent damper drive Dec. 20, 1983
4416611 Flue damper control Nov. 22, 1983
4408567 Furnace construction Oct. 11, 1983
4406396 Method and apparatus for regulating flue draft Sep. 27, 1983
4404613 Double switch fuse assembly Sep. 13, 1983
4403942 Self-checking safety switch control circuit Sep. 13, 1983

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