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Class Information
Number: 431/29
Name: Combustion > Timer, programmer, retarder or condition responsive control > Control of purger, of scavenger or of combustion start-up delay period
Description: Apparatus wherein a timing, retarding or programming means (1) effects the operation of a device which (a) supplies a quantity of fluid other than a combustible mixture to cleanse the burner of any undesirable fluid or (b) drains or otherwise removes undesirable fluid from the burner between combustion stopping and starting; or (2) causes upon the actuation of means calling for a combustion operation a predetermined period of inaction of any fire producing elements.

Sub-classes under this class:

Class Number Class Name Patents
431/30 Of scavenging or purging pump 15

Patents under this class:
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Patent Number Title Of Patent Date Issued
7857875 Autothermal reforming in a fuel processor utilizing non-pyrophoric shift catalyst Dec. 28, 2010
7824177 Combustion apparatus Nov. 2, 2010
7618595 Assembly for purifying toxic gases from production processes Nov. 17, 2009
7607914 Combustion type waste gas treatment system Oct. 27, 2009
6948929 Combustion type waste gas treatment system Sep. 27, 2005
6929465 Timer circuit for valve activation in oil burner system Aug. 16, 2005
6835062 Fuel oil supply circuit for an oil burner having a solenoid valve in parallel circuit with diaphragm valve for controlling oil flow at start up Dec. 28, 2004
6478574 Pump purge for oil primary Nov. 12, 2002
6390807 Pot type oil burner with unnoticeable bad odor May. 21, 2002
6216683 Gas oven control Apr. 17, 2001
6132203 Method and apparatus for burning oils of varying viscosity Oct. 17, 2000
6030205 Gas oven control Feb. 29, 2000
5771879 Heated makeup air system for a commercial kitchen Jun. 30, 1998
5655900 Gas oven control system Aug. 12, 1997
5456597 Intelligen transient eliminator for an ignition system Oct. 10, 1995
5453004 Method for operation of an oil evaporation burner and an oil evaporation burner for carrying out the method Sep. 26, 1995
5386815 Electric control apparatus for pulse combustion device Feb. 7, 1995
5360335 Fuel burner control system with selectable standing pilot mode Nov. 1, 1994
5328354 Incinerator with auxiliary gas evacuation system Jul. 12, 1994
5282738 Liquid fuel feeding method and liquid fuel burning apparatus Feb. 1, 1994
5078317 Heater for mobile units Jan. 7, 1992
5059114 Heating apparatus and method Oct. 22, 1991
4995806 Deodorizing device for oil stoves Feb. 26, 1991
4934286 Apparatus and method for the disposal of waste Jun. 19, 1990
4931011 Control and method for operating a vaporizer burner Jun. 5, 1990
4913128 Burner apparatus Apr. 3, 1990
4891004 Control of energy use in a furnace Jan. 2, 1990
4850852 Gas valve shut off method and apparatus Jul. 25, 1989
4828484 Gas valve relay redundant safety May. 9, 1989
4711628 Hot surface ignition system for a gas furnace and method of making the same Dec. 8, 1987
4688546 Deodorizing device for oil stove Aug. 25, 1987
4668179 Oil burner of the wick ignition type May. 26, 1987
4634369 Purging process Jan. 6, 1987
4634367 Carburetion type burning apparatus Jan. 6, 1987
4626269 Automated system for sealing a mount in a cathode-ray tube Dec. 2, 1986
4559006 Purging process Dec. 17, 1985
4543056 Safety device for fan heater Sep. 24, 1985
4518345 Direct ignition gas burner control system May. 21, 1985
4451226 Flame safeguard sequencer having safe start check May. 29, 1984
4451227 Flame safeguard sequencer having switch test functions May. 29, 1984
4299556 Timer circuit arrangement in digital combustion control system Nov. 10, 1981
4265611 Control system for purge gas to flare May. 5, 1981
4215549 Turbocharger combustor system Aug. 5, 1980
4147495 Waste gas dispersion stack Apr. 3, 1979
4145179 Combustion control system Mar. 20, 1979
4140474 Burner control system Feb. 20, 1979
4139339 Flare gas stack with purge control Feb. 13, 1979
4137035 Burner control apparatus Jan. 30, 1979
4102630 Burner control system Jul. 25, 1978
4089293 Multiple-coordinate means for applying a metal coating to a metal substrate May. 16, 1978

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