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Class Information
Number: 236/15C
Name: Automatic temperature and humidity regulation > Furnace controlled > Furnace controlled responsive to pressure
Description:










Patents under this class:

Patent Number Title Of Patent Date Issued
8521333 Method and apparatus for flue gas recirculation Aug. 27, 2013
8146584 Pressure switch assembly for a furnace Apr. 3, 2012
7874834 Air fuel ratio sensor of incinerator Jan. 25, 2011
7735743 Apparatus and methods for variable furnace control Jun. 15, 2010
7261243 Thermostat responsive to inputs from external devices Aug. 28, 2007
6754541 Control system apparatus for loading a value of a system parameter and preventing change thereto after a period of time Jun. 22, 2004
6321744 Modulating furnace having a low stage with an improved fuel utilization efficiency Nov. 27, 2001
6175207 Power up communication interface system Jan. 16, 2001
5522541 Method for proving furnace high-heat pressure switch Jun. 4, 1996
5456597 Intelligen transient eliminator for an ignition system Oct. 10, 1995
5249739 Apparatus and method for monitoring the operating condition of a burner system Oct. 5, 1993
5244147 Furnace pressure control method Sep. 14, 1993
5211331 Control in combination with thermostatically responsive assembly May. 18, 1993
5027789 Fan control arrangement for a two stage furnace Jul. 2, 1991
4925093 Forced draft direct vent system for a water heater May. 15, 1990
4708636 Flow sensor furnace control Nov. 24, 1987
4706881 Self-correcting microprocessor control system and method for a furnace Nov. 17, 1987
4703747 Excess air control Nov. 3, 1987
4547144 Fuel gas control Oct. 15, 1985
4483672 Gas burner control system Nov. 20, 1984
4427374 Recirculation device Jan. 24, 1984
4403942 Self-checking safety switch control circuit Sep. 13, 1983
4402303 Fan flow control device Sep. 6, 1983
4373897 Open draft hood furnace control using induced draft blower and exhaust stack flow rate sensing Feb. 15, 1983
4347869 Hydraulic valve position control system for regulating smokestack exhaust pressure Sep. 7, 1982
4334855 Furnace control using induced draft blower and exhaust gas differential pressure sensing Jun. 15, 1982
4262843 Method of and apparatus for controlling the feed amount of air for combustion in a natural draft-type heating furnace Apr. 21, 1981
4249890 Production of heated bituminous mixes Feb. 10, 1981
4239477 Furnace ignition system with draft control and loss-of-draft protection Dec. 16, 1980
4205631 Pressure limiting control for an inlet draft fan in an electric power plant Jun. 3, 1980
4102627 Draft tell-tale for fired furnaces Jul. 25, 1978
4096038 Method and apparatus for operating a calciner under a pressure differential Jun. 20, 1978
4004730 Furnace draft control for a steam generator Jan. 25, 1977
3985294 Furnace pressure control Oct. 12, 1976
3964675 Appartus for limiting vacuum and pressure in a furnace Jun. 22, 1976











 
 
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