| Patents for F23L 13 - Construction of valves or dampers for controlling air supply or draught (771) |
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| 10/15/1997 | EP0800628A1 Poppet damper in exhaust gas duct |
| 10/08/1997 | CN1161733A Poppet damper in exhaust gas duct |
| 09/23/1997 | US5669373 Thermostatic regulated air flow controller |
| 09/10/1997 | EP0794386A2 A damper for gases |
| 09/02/1997 | US5662464 Multi-direction after-air ports for staged combustion systems |
| 08/28/1997 | DE19606403A1 Arrangement to connect pressurised combustion equipment to flue pipe |
| 08/07/1997 | DE19603615A1 Waste gas removal system for hearths in building |
| 07/02/1997 | EP0781964A1 Valve and a heating apparatus comprising such valve |
| 06/18/1997 | EP0779476A2 A control damper, particularly for hot gases |
| 06/12/1997 | WO1997021049A1 Seal for the doors of power station flue gas deflecting dampers |
| 06/11/1997 | EP0777839A1 Air supply valve |
| 06/04/1997 | CN2255555Y Dual-plate circular ventilation door |
| 04/30/1997 | CN1148681A Multi-direction after-air ports for staged combustion systems |
| 03/12/1997 | CA2185078A1 Multi-direction after-air ports for staged combustion systems |
| 03/11/1997 | US5609522 Combination damper and chimney cap apparatus |
| 02/05/1997 | CN2246753Y Vortex burner |
| 01/22/1997 | EP0754916A2 A damper for use in flues and air ducts |
| 11/27/1996 | CN2241269Y Circulating fan for annealing furnace |
| 11/12/1996 | CA2046471C Thermally activated vent damper |
| 10/22/1996 | CA2098470C Flow control |
| 09/19/1996 | DE19508593A1 Closure flap for flue gas and heating gas pipelines |
| 08/08/1996 | DE19503229A1 Chimney stack section reducer |
| 07/18/1996 | DE19548800A1 Air supply control to burner |
| 07/03/1996 | CN2230400Y Ventilating-door structure for roof aspirator |
| 07/02/1996 | US5531213 Solid or liquid fuel stove |
| 06/27/1996 | DE4446395A1 Rotary vane valve for hot gas pipelines with lattice support |
| 04/04/1996 | WO1996010144A1 Poppet damper in exhaust gas duct |
| 04/04/1996 | CA2200071A1 Poppet damper in exhaust gas duct |
| 03/07/1996 | WO1996007055A1 Air supply valve |
| 03/07/1996 | CA2198459A1 Air supply valve |
| 03/06/1996 | CN1118187A Thermostat |
| 12/27/1995 | EP0689010A2 Sealing structure for a fluegasvalve |
| 12/23/1995 | CA2152288A1 Seal arrangement in a flue gas armature |
| 12/06/1995 | EP0685052A1 Thermostat |
| 08/30/1995 | EP0669498A2 Combustion apparatus for solid or liquid fuel |
| 02/15/1995 | EP0383855B1 Leaf spring seal |
| 10/04/1994 | US5351631 Removable damper for chemical recovery furnace |
| 09/29/1994 | DE4315715C1 Device for the leak-tight shutting off of a duct, opening etc. through which fluid flows, particularly in flues of firing systems |
| 09/13/1994 | US5346126 Device for controlling heating efficiency of water heater |
| 09/01/1994 | WO1994019635A1 Thermostat |
| 09/01/1994 | CA2155981A1 Thermostatic regulated air flow controller |
| 08/18/1994 | DE4404705A1 Apparatus for regulating the draught for a fireplace |
| 08/02/1994 | US5333838 Blade damper with extensions to reduce boundary leakage |
| 06/23/1994 | DE4243684A1 Cut-off slide for flue gas back suction channel |
| 06/15/1994 | CN1088006A Blade damper with extensions to reduce boundary leakage |
| 05/25/1994 | CN2166320Y Electric dust-removing air locking device |
| 05/03/1994 | US5307745 Removable damper for chemical recovery furnace |
| 03/24/1994 | CA2079529A1 Removable damper for chemical recovery furnace |
| 03/16/1994 | EP0587302A1 Blade damper with extensions to reduce boundary leakage |
| 03/12/1994 | CA2101883A1 Blade damper with extensions to reduce boundary leakage |
| 02/08/1994 | US5284127 Device for regulating the strength of the flue draught in heating appliances |
| 11/09/1993 | US5259411 Flow control |
| 09/29/1993 | CN1076771A System for controlling heat quantity of burner |
| 09/09/1993 | DE4207352A1 Flow control for secondary air to chimney - has control flap operated automatically over a limited angle, or by electric motor |
| 09/02/1993 | DE4204516C1 Gas-conduit stop valve - has U=section rust-proof-steel distance-strip securing ends of U=shaped sealing strip and enclosing base strip |
| 05/27/1993 | DE4215508C1 Solid fuel heating boiler - has curved guide attached to grate reaching up beyond great plane and into bottom of combustion chamber |
| 05/19/1993 | EP0542362A2 Device for regulating the flue draught strength in heating appliances |
| 05/19/1993 | CN2133768Y Directly heating hot-blast stove |
| 05/15/1993 | CA2082895A1 Device for regulating the flue draught strength in heating appliances |
| 02/16/1993 | US5186385 For a flue |
| 01/21/1993 | DE4123978A1 Shaft seal for flue damper - has flexible sealing rings to accommodate seal wear and bending of the shaft |
| 12/22/1992 | CA1311651C Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 12/01/1992 | US5167192 Damper controller for a chemical recovery furnace |
| 09/16/1992 | CN1018288B Dampers with leaf spring seals |
| 08/29/1992 | WO1992015824A1 Damper controller for a chemical recovery furnace |
| 08/20/1992 | CA2055780A1 Air actuated damper |
| 04/23/1992 | DE4032773A1 Secondary air control as chimney accessory |
| 02/25/1992 | US5090445 Air actuated damper |
| 01/30/1992 | DE4039676C1 Draught control flap for flue - incorporates counterbalance weight and brake to prevent sudden movements |
| 01/28/1992 | CA1294828C Dampers with leaf spring seals |
| 01/21/1992 | US5082172 Thermally activated vent damper |
| 11/21/1991 | DE4015584A1 Flue gas valve arrangement - has rotary valve vane moving against conical sealing seat and having outer edge elastic seal |
| 11/19/1991 | CA1292149C Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 11/06/1991 | CN1014628B Combustion apparatus with atomizer, and method of controlling same |
| 09/11/1991 | EP0445379A2 Auxiliary air admission regulator for mounting on chimneys near heating boiler connections |
| 05/16/1991 | WO1991006806A1 Chemical recovery furnace air port flow regulator |
| 05/14/1991 | US5014680 Self-powered automatic secondary air controllers for woodstoves and small furnaces |
| 03/26/1991 | US5001992 Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 12/05/1990 | EP0400757A2 Gas-fired heating apparatus |
| 11/07/1990 | EP0396293A2 Gas fired appliances and installations incorporating such appliances |
| 09/05/1990 | CN1045157A Lourver dampers for use in gas turbines exhaust systems and having blades protected against becoming warped |
| 08/22/1990 | EP0383186A1 Guillotine dampers with blade sealing means accommodative of thermal expansion forces |
| 08/22/1990 | EP0383185A1 Louver dampers for use in gas turbines exhaust systems and having blades protected against becoming warped |
| 08/22/1990 | CN1044845A Guillotine dampers with blade sealing means accommodative of thermal expansion forces |
| 08/13/1990 | CA2009819A1 Louver dampers for use in gas turbines exhaust systems and having blades protected against becoming warped |
| 08/13/1990 | CA2009818A1 Guillotine dampers with blade sealing means accommodative of thermal expansion forces |
| 06/12/1990 | US4932437 Louver dampers for use in gas turbines exhaust systems and having blades protected against becoming warped |
| 03/21/1990 | CN2054867U Multichannel pulsating air flow blocking device |
| 03/14/1990 | CN1040428A Dampers with leaf spring seals |
| 03/06/1990 | US4906174 Non-return valve for pulsating burners |
| 03/06/1990 | US4905662 Guillotine dampers with blade sealing means accommodative of thermal expansion forces |
| 12/14/1989 | WO1989012193A1 Dampers with leaf spring seals |
| 12/14/1989 | DE3820453A1 Secondary-air device (draught preventer) for house chimneys |
| 11/30/1989 | WO1989011623A1 Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 11/30/1989 | WO1989011622A1 Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 08/17/1989 | DE3903739A1 Draught-regulating device for a heating appliance |
| 07/11/1989 | US4846080 Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 06/28/1989 | CN1004648B Apparatus for regulating and cleaning air passage in wall of furnace |
| 06/13/1989 | US4838182 Apparatus for regulating air flow through an air port of a chemical recovery furnace |
| 05/30/1989 | US4834282 Device for use with flue dampers |