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Class Information
Number: 236/46E
Name: Automatic temperature and humidity regulation > With timing element > Hot air furnace
Description:










Patents under this class:

Patent Number Title Of Patent Date Issued
8275484 Stepper motor gas valve and method of control Sep. 25, 2012
8201750 Fuel economizer improvements Jun. 19, 2012
8074892 Appliance control with automatic damper detection Dec. 13, 2011
7913927 Fuel economizer Mar. 29, 2011
7721972 Appliance control with automatic damper detection May. 25, 2010
7455238 Control system and method for multistage air conditioning system Nov. 25, 2008
7240851 Thermostat fan and boiler timer Jul. 10, 2007
6637667 Method and apparatus for energy recovery in an environmental control system Oct. 28, 2003
5971284 Apparatus for regulating heater cycles to improve forced-air heating system efficiency Oct. 26, 1999
5582233 Air circulation enhancement system Dec. 10, 1996
5377909 Limit switch control especially for warm air furnaces Jan. 3, 1995
5340028 Adaptive microprocessor control system and method for providing high and low heating modes in a furnace Aug. 23, 1994
5337952 Adaptive microprocessor control system and method for providing multiple heating modes in twinned furnaces Aug. 16, 1994
5326026 Energy and peak-load conserving thermostat and method with controlled deadband Jul. 5, 1994
5326025 Warm up method for two stage furnace Jul. 5, 1994
5011073 Control to operate a forced air blower Apr. 30, 1991
4951870 Overtemperature control Aug. 28, 1990
4907737 Electronic control system for a gas-fired/hot air furnace with induced draft blower Mar. 13, 1990
4838482 Air conditioning system with periodic fan operation Jun. 13, 1989
4815524 Control system for a furnace operating in the continuous blower mode Mar. 28, 1989
4667874 Energy saving furnace controller May. 26, 1987
4638942 Adaptive microprocessor control system and method for providing high and low heating modes in a furnace Jan. 27, 1987
4595139 Control for humidifier of the type used with thermostatically controlled furnace Jun. 17, 1986
4502625 Furnace control apparatus having a circulator failure detection circuit for a downflow furnace Mar. 5, 1985
3989928 Method and apparatus for cyclically controlling the energization of home water heaters Nov. 2, 1976
3945564 Temperature control system Mar. 23, 1976











 
 
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