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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
7849805 System and method for the operation of a furnace that is operated with at least one coal pulverizer Dec. 14, 2010
7717702 Direct sidewall vent system May. 18, 2010
6748880 Boiler internal flue gas by-pass damper for flue gas temperature control Jun. 15, 2004
6681497 Web dryer with fully integrated regenerative heat source and control thereof Jan. 27, 2004
6652272 Device for sluicing a hot meal-form material Nov. 25, 2003
6546897 Thermodynamically activated flue damper Apr. 15, 2003
6497230 Air port damper Dec. 24, 2002
6481361 Coal balancing damper Nov. 19, 2002
6276929 Method for controlling kiln pressure Aug. 21, 2001
6257155 Curved blade by-pass damper with flow control Jul. 10, 2001
6257156 Wind box for a chemical recovery furnace Jul. 10, 2001
6220188 Windbox burner Apr. 24, 2001
6076476 Method of and apparatus for preventing emission of dioxins in incineration facility Jun. 20, 2000
5997277 Method and a device for recovery of energy from media containing combustible substances even at low concentration Dec. 7, 1999
5824275 Secondary and tertiary air nozzle for furnace apparatus Oct. 20, 1998
5738021 Adjustable sleeve damper assembly for a coal-fired furnace Apr. 14, 1998
5730070 Apparatus for introducing gas recirculation to control steam temperature in steam generation systems Mar. 24, 1998
5609522 Combination damper and chimney cap apparatus Mar. 11, 1997
5292063 Damper actuator Mar. 8, 1994
5259411 Flow control Nov. 9, 1993
5244147 Furnace pressure control method Sep. 14, 1993
5239947 Vent damper for gas water heater Aug. 31, 1993
5167192 Damper controller for a chemical recovery furnace Dec. 1, 1992
4981262 Unit for supplying combustion air to a furnace Jan. 1, 1991
4880376 Method and apparatus for monitoring and calibrating damper position Nov. 14, 1989
4803931 Flue restrictor Feb. 14, 1989
4779795 Convector room heater incorporating a hot water boiler Oct. 25, 1988
4777932 Counterweight static pressure-air flow damper assembly Oct. 18, 1988
4770160 Vent damper Sep. 13, 1988
4770158 Combustion with leakage resistant exhaust valve Sep. 13, 1988
4770108 Two-way vent cap for controlled atmosphere furnace Sep. 13, 1988
4702178 Emergency exhaust system for hazardous waste incinerator Oct. 27, 1987
4643862 Refractory stove damper with catalytic effect Feb. 17, 1987
4570549 Splitter for use with a coal-fired furnace utilizing a low load burner Feb. 18, 1986
4553731 Fail-closed, tight seal gas safety valve system Nov. 19, 1985
4526160 Apparatus for controlling flow of combustion products Jul. 2, 1985
4493311 Guillotine damper Jan. 15, 1985
4487137 Auxiliary exhaust system Dec. 11, 1984
4484562 Flexible disk damper Nov. 27, 1984
4450344 Damper drive system in a combined microwave and electric heater oven May. 22, 1984
4442798 Vent assembly Apr. 17, 1984
4422440 Automatic draft controller Dec. 27, 1983
4404613 Double switch fuse assembly Sep. 13, 1983
4390123 Thermally activated, automatic, single blade damper and damper operator Jun. 28, 1983
RE31256 Automatic damper means and controls therefor May. 31, 1983
4369718 Shut-off system for flue gas conduits or air intake conduits in oil and gas fire systems Jan. 25, 1983
4341344 Automatic draft controller Jul. 27, 1982
4308805 High temperature damper Jan. 5, 1982
4290552 Damper control mechanism Sep. 22, 1981
4279629 Fire prevention filter for chimneys and the like Jul. 21, 1981

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