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Class Information
Number: 60/732
Name: Power plants > Combustion products used as motive fluid > Combustion products generator > Having initial fuel-rich combustion zone
Description: Device having a plurality of combustion zones distinguished by the fuel-oxidizer ratio supplied to each zone for combustion therein, and wherein an amount of fuel in excess of that required for stoichiometric combustion is supplied to a first fuel-rich zone for combustion, and to the product of that combustion, and downstream of the first zone, additional fuel or air is added for combustion at one or more locations in what is considered an additional zone or zones whereby the total combustion process of the device is staged.

Sub-classes under this class:

Class Number Class Name Patents
60/733 Separate fuel injectors for plural zones 111

Patents under this class:
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Patent Number Title Of Patent Date Issued
8701416 Radially staged RQL combustor with tangential fuel-air premixers Apr. 22, 2014
8671692 Annular gas turbine combustor including converging and diverging segments Mar. 18, 2014
8640464 Combustion system Feb. 4, 2014
8443610 Low emission gas turbine combustor May. 21, 2013
8381525 System and method using low emissions gas turbine cycle with partial air separation Feb. 26, 2013
8356992 Method and system for capturing carbon dioxide in an oxyfiring process where oxygen is supplied by regenerable metal oxide sorbents Jan. 22, 2013
8196407 Small gas turbine engine with multiple burn zones Jun. 12, 2012
8171740 Annular rich-quench-lean gas turbine combustors with plunged holes May. 8, 2012
8028528 Annular gas turbine combustor Oct. 4, 2011
8015814 Turbine engine having folded annular jet combustor Sep. 13, 2011
7886539 Multi-stage axial combustion system Feb. 15, 2011
7836677 At least one combustion apparatus and duct structure for a gas turbine engine Nov. 23, 2010
7568343 Small gas turbine engine with multiple burn zones Aug. 4, 2009
7503511 Pintle injector tip with active cooling Mar. 17, 2009
6931862 Combustor system for an expendable gas turbine engine Aug. 23, 2005
6845621 Annular combustor for use with an energy system Jan. 25, 2005
6810673 Low emissions combustor for a gas turbine engine Nov. 2, 2004
6568188 Bypass air injection method and apparatus for gas turbines May. 27, 2003
6553765 Turbojet engine Apr. 29, 2003
6484489 Method and apparatus for mixing fuel to decrease combustor emissions Nov. 26, 2002
6453676 50 pound thrust level turbojet engine Sep. 24, 2002
6374594 Silo/can-annular low emissions combustor Apr. 23, 2002
6286298 Apparatus and method for rich-quench-lean (RQL) concept in a gas turbine engine combustor having trapped vortex cavity Sep. 11, 2001
6279323 Low emissions combustor Aug. 28, 2001
6260359 Offset dilution combustor liner Jul. 17, 2001
6240731 Low NOx combustor for gas turbine engine Jun. 5, 2001
6182451 Gas turbine combustor waving ceramic combustor cans and an annular metallic combustor Feb. 6, 2001
6050078 Gas turbine combustion chamber with two stages and enhanced acoustic properties Apr. 18, 2000
5996351 Rapid-quench axially staged combustor Dec. 7, 1999
5819540 Rich-quench-lean combustor for use with a fuel having a high vanadium content and jet engine or gas turbine system having such combustors Oct. 13, 1998
5816050 Low-emission combustion chamber for gas turbine engines Oct. 6, 1998
5794449 Dry low emission combustor for gas turbine engines Aug. 18, 1998
5735126 Combustion chamber Apr. 7, 1998
5727378 Gas turbine engine Mar. 17, 1998
5617715 Inverse combined steam-gas turbine cycle for the reduction of emissions of nitrogen oxides from combustion processes using fuels having a high nitrogen content Apr. 8, 1997
5285628 Method of combustion and combustion apparatus to minimize No.sub.x and CO emissions from a gas turbine Feb. 15, 1994
5255506 Solid fuel combustion system for gas turbine engine Oct. 26, 1993
5235804 Method and system for combusting hydrocarbon fuels with low pollutant emissions by controllably extracting heat from the catalytic oxidation stage Aug. 17, 1993
5209066 Counter flow combustion chamber for a gas turbine engine May. 11, 1993
5207053 Method and system for staged rich/lean combustion May. 4, 1993
5052919 Multi-stage combustion chamber for combustion of nitrogen-containing gas with reduced NO.sub.x emissions, and method for its operation Oct. 1, 1991
5025622 Annular vortex combustor Jun. 25, 1991
5002483 Multi-stage combustion chamber for combustion of nitrogen-containing gas with reduced NO.sub.x emissions, and method for its operation Mar. 26, 1991
4996838 Annular vortex slinger combustor Mar. 5, 1991
4958488 Combustion system Sep. 25, 1990
4936091 Two stage rocket combustor Jun. 26, 1990
4927349 Method for burning nitrogen-containing fuels May. 22, 1990
4912931 Staged low NO.sub.x gas turbine combustor Apr. 3, 1990
4903492 Dilution air dispensing apparatus Feb. 27, 1990
4900246 Apparatus for burning nitrogen-containing fuels Feb. 13, 1990

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