Patents
Sitemap › F23 - Combustion apparatus; Combustion processes › 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 › F23L 11 - Arrangements of valves or dampers after the fire
Patents for F23L 11 - Arrangements of valves or dampers after the fire (437)
12/1988
12/15/1988WO1988009458A3 Gas flow diverter
12/01/1988WO1988009458A2 Gas flow diverter
09/1988
09/13/1988US4770160 For limiting the flow of ambient air in a hot water heater
06/1988
06/01/1988DE3640118A1 Supplementary-air device
05/1988
05/11/1988DE3637734A1 Device for shutting off large hot-gas pipelines
12/1987
12/10/1987DE3716695A1 Fuel-heated device
12/02/1987EP0247840A2 Emergency exhaust system for hazardous waste incinerator
10/1987
10/27/1987US4702178 Emergency exhaust system for hazardous waste incinerator
10/13/1987US4699121 Fuel saving device
10/07/1987EP0240445A1 Sectional-type cast iron boiler for solid fuels comprising a fireproof afterburning channel
09/1987
09/22/1987US4694820 Stove with catalytic converter
05/1987
05/07/1987DE3539311A1 Chimney, ventilation and firing system
03/1987
03/17/1987US4649808 Fireplace damper assembly
02/1986
02/18/1986US4570847 Flue damper control system
11/1985
11/26/1985US4554863 Chimney damper
10/1985
10/29/1985US4549524 Catalytic unit for burners
10/15/1985CA1195195A1 Damper
10/01/1985US4543941 Valve for furnace stack pipe
07/1985
07/02/1985US4526160 Apparatus for controlling flow of combustion products
05/1985
05/22/1985EP0141944A1 Regulating device for chimney draught
04/1985
04/09/1985US4509499 Energy efficient damper for a furnace
02/1985
02/27/1985EP0133606A2 Fireplace
02/05/1985US4497310 Flue box with adjustable counterbalance cap
02/05/1985US4497262 Wood fired boiler
01/1985
01/22/1985US4494525 Stove with catalytic converter
10/1984
10/16/1984US4476852 Add-on catalytic damper assembly
10/09/1984CA1175721A1 Valve for furnace stack pipe
09/1984
09/11/1984US4470401 Valve for furnace stack pipe
09/11/1984CA1174133A1 Apparatus for reducing heat loss from a furnace
08/1984
08/21/1984CA1172895A1 Energy saving chimney cap assembly
05/1984
05/30/1984EP0109620A2 Fuel heated heat source
05/22/1984US4449512 Energy efficient damper for a furnace
04/1984
04/17/1984US4443181 In a furnace
04/17/1984US4442798 Vent assembly
01/1984
01/11/1984EP0098211A1 Casing with an automatically operated flap for a duct such as a fire-place flue gas duct
12/1983
12/27/1983US4422440 Automatic draft controller
12/20/1983US4421096 Vent damper drive
11/1983
11/22/1983US4416253 Apparatus for controlling flow of combustion products
10/1983
10/11/1983US4408567 Furnace construction
07/1983
07/20/1983EP0084016A1 Direct removal of flue gases in heating appliances of the closed type
07/19/1983US4393815 Heating plant
06/1983
06/07/1983US4386731 Damper construction for a gas fired combustion apparatus
05/1983
05/31/1983USRE31256 Automatic damper means and controls therefor
05/24/1983US4384671 Temperature responsive vent damper
02/1983
02/08/1983US4372289 Flue box assembly
01/1983
01/25/1983US4369718 Shut-off system for flue gas conduits or air intake conduits in oil and gas fire systems
01/18/1983US4368663 Chimney damper
01/04/1983US4366805 Sector control wood-type fuel burning furnace
12/1982
12/28/1982USRE31112 Automatic flue damper
10/1982
10/26/1982CA1134229A1 Flue box assembly
09/1982
09/28/1982US4351361 Valve with spring gate
09/28/1982US4351276 Heat recovery device for boilers
09/22/1982EP0060345A2 Device in the flue duct of oil or gas fired heating boilers
08/1982
08/31/1982CA1130656A1 Vent control arrangement for combustion apparatus
08/24/1982US4345528 Wood burning stove
08/19/1982WO1982002759A1 Method for controlling the emitted heating effect from a furnace which is fired with solid fuel
07/1982
07/27/1982US4341344 Automatic draft controller
06/1982
06/22/1982US4335704 Draft air secondary combustion apparatus for stoves
05/1982
05/18/1982US4330503 Wood burning stove
05/18/1982US4329967 Adjustable flue control for furnaces
04/1982
04/20/1982CA1122073A1 Automatic damper for furnace vent pipe
03/1982
03/02/1982CA1119069A1 Flue restrictor
01/1982
01/08/1982EP0034160A4 Flue control.
12/1981
12/08/1981CA1114044A1 Automatic flue damper control system
11/1981
11/24/1981US4301785 Adjustable flue control for furnaces
11/17/1981US4300527 Bi-loop heat recovery system
10/1981
10/20/1981CA1111127A1 Automatic draft control
10/13/1981US4294226 Automatic furnace vent damper control
10/13/1981US4294223 Bi-loop heat recovery system for an oil fired furnace
10/13/1981CA1110499A1 Positive automatic draft control
09/1981
09/30/1981EP0036565A1 Waste-heat recovery apparatus for boilers
09/16/1981EP0035840A1 Automatic draft controller
09/03/1981WO1981002463A1 Automatic draft controller
08/1981
08/26/1981EP0034160A1 Flue control
07/1981
07/07/1981US4276871 Flue damper and draft regulator
05/1981
05/26/1981US4269166 Stack damper valve
05/12/1981CA1100847A1 Damper valve
05/12/1981CA1100820A1 Automatic damper device
04/1981
04/28/1981US4264033 Shut-off plate for combustion spaces adjustable by motor
04/28/1981US4263890 Flue restrictor
04/22/1981EP0027175A2 Shut-off system for flue gas exhaust conduits or suction air conduits of oil and gas fireplaces
04/21/1981US4262652 Vent damper drive
04/21/1981US4262608 Method and apparatus for powered flue products exhaust and preheated combustion air supply
04/07/1981US4259943 Fuel economizer
03/1981
03/24/1981US4257393 Venting system for a fuel-burning heating plant
03/17/1981US4256257 Automatic chimney cap
03/10/1981US4254759 Automatic damper means and controls therefor
03/05/1981WO1981000609A1 Flue control
02/1981
02/17/1981US4251024 Automatic vent damper
02/10/1981US4249883 Automatic damper device
02/10/1981US4249694 Draft control arrangement
01/1981
01/20/1981US4245778 Vent control arrangement for combustion apparatus
01/20/1981CA1093956A1 Gas flow controlled furnace flue damper
12/1980
12/16/1980US4239061 Damper valve
12/10/1980EP0019671A1 Damper assembly
12/09/1980US4237855 Flue throttle
11/1980
11/25/1980US4235219 Controlling the damping of flues
11/11/1980CA1089319A1 Isolating/pressure relief damper
10/1980
10/28/1980CA1088389A1 Device in flue gas dampers
10/07/1980CA1087031A1 Independent biasing means for automatic flue damper
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