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Class Information
Number: 431/31
Name: Combustion > Timer, programmer, retarder or condition responsive control > Control of purger, of scavenger or of combustion start-up delay period > Of scavenging or purging pump > Scavenging or purging period started by combustion demand
Description: Apparatus in which, during initiation of a combustion period, the device for moving the cleansing fluid is activated for a predetermined time prior to actuation to combustion starting position of means controlling the necessary fire producing elements, (e.g., fuel supplier, igniter, etc.).










Patents under this class:
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Patent Number Title Of Patent Date Issued
8388339 Single micro-pin flame sense circuit and method Mar. 5, 2013
8006407 Drying system and method of using same Aug. 30, 2011
7874834 Air fuel ratio sensor of incinerator Jan. 25, 2011
7833010 Natural gas injection system for regenerative thermal oxidizer Nov. 16, 2010
7824177 Combustion apparatus Nov. 2, 2010
6016625 Methods and apparatuses for monitoring or controlling pests Jan. 25, 2000
5997280 Intelligent burner control system Dec. 7, 1999
5902098 Method for controlling an ignition for a gas boiler May. 11, 1999
5685707 Integrated burner assembly Nov. 11, 1997
5658140 Combustion device Aug. 19, 1997
5456597 Intelligen transient eliminator for an ignition system Oct. 10, 1995
5386815 Electric control apparatus for pulse combustion device Feb. 7, 1995
5372497 Process and apparatus for igniting a burner in an inert atmosphere Dec. 13, 1994
5360335 Fuel burner control system with selectable standing pilot mode Nov. 1, 1994
5348466 Heat exchanger system, fuel control system therefor and methods of making the same Sep. 20, 1994
5209655 Heat exchanger system, fuel control system therefor, and methods of making the same May. 11, 1993
5197665 Water heater Mar. 30, 1993
5154160 Automated oven with gas-fired radiant heater assembly Oct. 13, 1992
5141431 Heat exchanger system, fuel control system therefor Aug. 25, 1992
5044929 Ignition control apparatus for pulse combustor Sep. 3, 1991
5009588 Time-delay circuit for automatic shutdown of furnace systems Apr. 23, 1991
4992040 Airflow switch checking circuit Feb. 12, 1991
4970822 Contact poison delivery system Nov. 20, 1990
4850852 Gas valve shut off method and apparatus Jul. 25, 1989
4842510 Integrated furnace control having ignition and pressure switch diagnostics Jun. 27, 1989
4752210 Power vent and control for furnace Jun. 21, 1988
4711628 Hot surface ignition system for a gas furnace and method of making the same Dec. 8, 1987
4695246 Ignition control system for a gas appliance Sep. 22, 1987
4496305 Ignition control circuit for a boiler system Jan. 29, 1985
4488537 Method and installation for improving the efficiency of a submerged-combustion heating installation Dec. 18, 1984
4482312 Burner control system Nov. 13, 1984
4460329 Power vent and control for furnace Jul. 17, 1984
4459099 Fuel and ignition control Jul. 10, 1984
4457692 Dual firing rate flame sensing system Jul. 3, 1984
4445841 Combustion control apparatus May. 1, 1984
4439140 Energy saving boiler purge sequence control Mar. 27, 1984
4415328 Fuel and ignition control Nov. 15, 1983
4403943 Flame surveying means in burner ignition Sep. 13, 1983
4395224 Burner control system Jul. 26, 1983
4389184 Combustion control apparatus Jun. 21, 1983
4370126 Combustion control apparatus Jan. 25, 1983
4303383 Condition control system with safety feedback means Dec. 1, 1981
4299555 Control circuit for combustion systems Nov. 10, 1981
4257759 Fuel burner primary control means Mar. 24, 1981
4249884 Burner control apparatus with stabilized pilot flame timing interval Feb. 10, 1981
4243372 Burner control system Jan. 6, 1981
4192641 Combustion control apparatus Mar. 11, 1980
4180380 Electrical controls for heating appliances Dec. 25, 1979
4137035 Burner control apparatus Jan. 30, 1979
4113419 Burner control apparatus Sep. 12, 1978

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