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Class Information
Number: 236/1EB
Name: Automatic temperature and humidity regulation > Miscellaneous > Multistage controls > Single valve staging

Patents under this class:

Patent Number Title Of Patent Date Issued
7793649 Temperature control apparatus and method for a barbeque grill Sep. 14, 2010
7568908 Low fire start control Aug. 4, 2009
7296426 Interactive control system for an HVAC system Nov. 20, 2007
5918803 Power regulating system for the burner of a heater Jul. 6, 1999
5713515 Method and system in a fluid heating apparatus for efficiently controlling combustion Feb. 3, 1998
5119884 Multiple stage electronic temperature control for heating and cooling Jun. 9, 1992
5042431 Multiple boiler control system and method of operation Aug. 27, 1991
4976459 Warmup method for a two stage furnace Dec. 11, 1990
4887767 Limit switch control method for a two-stage furnace Dec. 19, 1989
4886110 HVAC zone control system Dec. 12, 1989
4850530 Gas valve using modular construction Jul. 25, 1989
4789097 Humidity control apparatus for an area Dec. 6, 1988
4542849 Method and apparatus for regulating a heating installation in premises including a plurality of heat generators Sep. 24, 1985
4513910 Adaptive low fire hold control system Apr. 30, 1985
4513909 Fuel burner control system with low fire hole Apr. 30, 1985
4425930 Fluid flow control apparatus and method Jan. 17, 1984
4420113 Method of and system for controlling the operation of a heater Dec. 13, 1983
4337893 Multi-phase modular comfort controlled heating system Jul. 6, 1982
4252300 Burner control system Feb. 24, 1981
4199690 Control system for actuators which can be separately energized and deenergized Apr. 22, 1980
4168719 Gas control unit for a burner Sep. 25, 1979
4140067 Furnace control system Feb. 20, 1979
4085921 Multiple-mode fluid-flow control valve arrangement Apr. 25, 1978
4034911 Burner control system Jul. 12, 1977
4019679 Thermostatically controlled heating arrangement including a heat pump Apr. 26, 1977
3999934 Start up circuit Dec. 28, 1976
3964466 Parallel fluid heating system Jun. 22, 1976

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