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| More topics under "F23L - Supplying air or non-combustible liquids or gases to combustion apparatus in general; Valves or dampers specially adapted for controlling air supply or draught in combustion apparatus; Inducing draught in combustion apparatus; Tops for chimneys or ventilating shafts; Terminals for flues" (15,396) |
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| F23L 1 - Passages or apertures for delivering primary air for combustion (1,377) | | F23L 11 - Arrangements of valves or dampers after the fire (437) | | F23L 13 - Construction of valves or dampers for controlling air supply or draught (771) | | F23L 15 - Heating of air supplied for combustion (4,477) | | F23L 17 - Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues (1,376) | | F23L 3 - Arrangements of valves or dampers before the fire (255) | | F23L 5 - Blast-producing apparatus before the fire (669) | | F23L 7 - Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam (4,061) | | F23L 9 - Passages or apertures for delivering secondary air for completing combustion of fuel (1,964) | | F23L 99 - Subject matter not provided for in other groups of this subclass (9) |
| Patents for F23L - Supplying air or non-combustible liquids or gases to combustion apparatus in general; Valves or dampers specially adapted for controlling air supply or draught in combustion apparatus; Inducing draught in combustion apparatus; Tops for chimneys or ventilating shafts; Terminals for flues (17) |
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| 10/16/2012 | USRE43733 Method and apparatus for improving boiler combustion | | 03/26/2009 | WO2005008130A3 Method and apparatus for improving combustion in recovery boilers | | 03/06/2007 | US7185594 Method and apparatus for improving combustion in recovery boilers | | 05/10/2006 | EP1654494A2 Method and apparatus for improving combustion in recovery boilers | | 03/01/2006 | EP1384031B1 Burner for pellets | | 03/17/2005 | US20050056195 Method and apparatus for improving combustion in recovery boilers | | 01/27/2005 | WO2005008130A2 Method and apparatus for improving combustion in recovery boilers | | 01/28/2004 | EP1384031A1 Burner for pellets | | 10/10/2002 | WO2002079693A1 Burner for pellets | | 01/08/2002 | CA2231278C Protection of the air ports of a recovery boiler | | 09/27/2000 | EP1039235A2 Hood with virtual barrier for the automatic activation of lamps and/or fan | | 07/22/2000 | CA2296866A1 Method and apparatus in the ventilation over a boiler room | | 02/15/2000 | US6024028 Protection of the air ports of a recovery boiler | | 02/24/1993 | EP0401205B1 Device for supply of secondary air, and boiler with the device | | 12/12/1990 | EP0401205A1 Device for supply of secondary air, and boiler with the device. | | 02/27/1990 | US4903616 Device for supply of secondary air, and boiler with the device | | 11/19/1987 | WO1987006999A1 Device for supply of secondary air, and boiler with the device |
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