| Patents for F23L 11 - Arrangements of valves or dampers after the fire (437) |
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| 12/08/1998 | US5845632 Vent damper including pivot poppet |
| 11/05/1998 | DE19718147A1 Waste gas diverter unit between gas turbine and waste heat boiler |
| 09/23/1998 | EP0866272A2 Auxiliary air admission regulator |
| 08/19/1998 | CN1190696A Valve device |
| 08/13/1998 | WO1998035138A1 A valve device |
| 08/06/1998 | DE19744013A1 Arrangement of several gas calorific burners |
| 05/20/1998 | EP0843129A2 Duct closing damper |
| 12/16/1997 | US5697596 Flap valve with improved actuator |
| 12/04/1997 | DE19707340A1 Combustion gas routing method for steam heating boiler |
| 11/26/1997 | EP0809073A2 Drive shaft assembly |
| 11/04/1997 | US5682841 Variable flow volume control baffle and vent damper |
| 10/09/1997 | DE19608567C1 Stop-valve for gas passage heat-insulated from surroundings |
| 09/16/1997 | CA2073077C Power blower ventilated hot gas water heater assembly with ambient air mixing means |
| 09/10/1997 | EP0794385A1 Exhaust piece for connecting a central heating apparatus to an open stack |
| 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 |
| 09/19/1996 | DE19508593A1 Closure flap for flue gas and heating gas pipelines |
| 09/17/1996 | US5555876 Chimney safety and control system |
| 07/16/1996 | US5535768 Method and apparatus for reducing damper operating pressure |
| 04/24/1996 | EP0708298A2 Heating appliance |
| 04/17/1996 | EP0707176A2 Tension lever flap valve for conduits having large cross-section |
| 12/06/1995 | EP0685689A1 Combined air supply and combustion gas discharge system for closed type combustion appliances |
| 11/02/1995 | DE19511577A1 Automatic outlet flap for boiler flue gases |
| 08/01/1995 | US5437574 Top sealing chimney cap |
| 03/24/1995 | CA2106811A1 Duct sealing apparatus and ducting system |
| 02/15/1995 | EP0383855B1 Leaf spring seal |
| 02/07/1995 | US5387151 Top sealing chimney cap |
| 11/08/1994 | US5363025 Actuator employing unidirectional motor for bidirectional rotational positioning |
| 11/02/1994 | EP0622588A2 Shut-off device for conduits having a large cross-section, especially for power plant exhaust and flue gas conduits |
| 09/29/1994 | DE4343619A1 Shut-off device for air-carrying conduits, especially flues |
| 09/15/1994 | DE4309146C1 Secondary-air inlet device at the exhaust-gas duct of a fireplace |
| 08/18/1994 | DE4404705A1 Apparatus for regulating the draught for a fireplace |
| 08/18/1994 | DE4313894C1 Cut-off apparatus for ducts of large cross-sections, in particular for exhaust gas and smoke gas ducts of power stations |
| 08/02/1994 | US5334092 Duct sealing apparatus and ducting system |
| 07/01/1994 | CA2111767A1 Actuator employing unidirectional motor for bidirectional rotational positioning |
| 06/23/1994 | DE4243684A1 Cut-off slide for flue gas back suction channel |
| 06/21/1994 | US5322087 Discharge system for combustion gases |
| 05/26/1994 | DE4239423A1 Hydraulic drive for tension lever flap valve - has two piston cylinder units attached to operating levers of spur wheel gear comprising two drive and one driven pinions. |
| 03/22/1994 | US5295901 Top sealing chimney cap |
| 11/18/1993 | DE4215520A1 Heat exchanger for heating stove - has hollow body with diving wall with integrated control unit and top cross plate |
| 10/26/1993 | US5255665 Power vent blower assembly for gas water heater |
| 09/09/1993 | DE4207352A1 Flow control for secondary air to chimney - has control flap operated automatically over a limited angle, or by electric motor |
| 08/31/1993 | US5239947 Vent damper for gas water heater |
| 06/03/1993 | DE4139475A1 Flue for fireplace with forced draught - has circular opening in side wall covered by rotatable sliding plate which is moved by motor and controls degree of draught |
| 06/01/1993 | US5215454 Buzz suppression in burners of high capacity direct fired fluid heaters |
| 05/13/1993 | DE4136847A1 Gas pipe for gas turbine installation |
| 05/12/1993 | EP0541195A1 Diverter valve system for a conduit |
| 03/24/1993 | EP0533282A1 A discharge system for combustion gases |
| 03/18/1993 | DE4136907A1 Flue gas or ventilation duct control flap - has operating spindle connected to double arm having two operating cylinders with two control valves |
| 01/20/1993 | EP0524012A2 Power vent blower assembly for gas water heater |
| 11/03/1992 | US5160291 Chimney damper |
| 11/03/1992 | US5159954 Hinged safety-valve for large ducts |
| 09/16/1992 | CN1018288B Dampers with leaf spring seals |
| 08/25/1992 | US5141152 Flue gas closure system |
| 08/05/1992 | EP0323491B1 Gas flow diverter |
| 07/07/1992 | US5127874 Chimney damper with hammer device |
| 07/07/1992 | CA1304651C Gas flow diverter |
| 06/30/1992 | US5125869 Spring biased chimney damper |
| 04/29/1992 | EP0482310A1 Butterfly valve-driving for closure of smoke gas or discharge air conduits |
| 04/23/1992 | DE4032773A1 Secondary air control as chimney accessory |
| 04/22/1992 | EP0481966A2 Gas flow diverter |
| 04/01/1992 | EP0478100A2 Shut-off device for a gas duct |
| 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 |
| 01/14/1992 | US5080006 Chimney damper device |
| 12/19/1991 | DE4016606A1 Seal between shut=off valve and its frame - incorporates double armed sealing lamella with support and sealing arms |
| 10/09/1991 | CN1014260B Gas flow diverter |
| 09/19/1991 | DE4007849A1 Furnace for burning solid fuel - has flow of primary and secondary air controlled independently of each other |
| 09/11/1991 | EP0445379A2 Auxiliary air admission regulator for mounting on chimneys near heating boiler connections |
| 08/22/1991 | DE4005424A1 Shutter valves for gas in adjacent branched pipes - has each shutter controlled by single drive, opening one shutter while closing other and vice=versa |
| 08/22/1991 | DE4004708A1 Cut=off valve system - pivots in frame, is plate-shaped, and has two peripheral, spaced sealing fillets |
| 07/18/1991 | DE4001849A1 Chimney fitted with extension and fan - incorporates collar to reduce noise emitted by fan unit |
| 07/04/1991 | DE3943192A1 Time-switched chimney damper for electrically-controlled fireplace - has control circuit drawing on capacitive store of energy during transitional phase before opening of flap |
| 05/07/1991 | US5012793 Power vented direct vent system |
| 02/28/1991 | DE3928351A1 Heater with air conditioning unit - has exhaust of heater and exhaust air line of air conditioning unit fed to common collection chamber |
| 12/05/1990 | EP0400757A2 Gas-fired heating apparatus |
| 11/07/1990 | EP0396293A2 Gas fired appliances and installations incorporating such appliances |
| 10/18/1990 | DE3912186A1 Gas deflector for large flue gas pipes - has housing with three pipe connections, with flap moving on pivot bearing and curved pulley guide for cable |
| 07/31/1990 | US4944673 Drier for a web of material |
| 05/29/1990 | US4929173 Heating appliance with combustion air preheat |
| 05/03/1990 | DE3935769A1 Atmospheric water-heating burner - has exhaust throttle cross=section reducible as desired |
| 04/24/1990 | US4919169 Gas flow diverter |
| 03/14/1990 | EP0357840A1 Pressurized combustion chamber boiler provided with an inlet for secondary air |
| 03/14/1990 | CN1040428A Dampers with leaf spring seals |
| 12/14/1989 | WO1989012193A1 Dampers with leaf spring seals |
| 12/14/1989 | DE3820453A1 Secondary-air device (draught preventer) for house chimneys |
| 11/02/1989 | DE3813663A1 Device for shutting off large hot-gas pipes |
| 11/02/1989 | DE3813170A1 Thermally controllable shut-off device in pipelines for gaseous flow media |
| 09/26/1989 | CA1260356A1 Valve arrangement for opening and closing one of two medium flow channels |
| 08/22/1989 | US4858517 Fire damper kit |
| 08/02/1989 | EP0326227A1 A drier for a web of material |
| 05/16/1989 | CA1254089A1 Chimney damper |
| 04/25/1989 | US4823836 Dampers with leaf spring seals |
| 04/18/1989 | US4821771 For directing the flow of gas |
| 04/18/1989 | US4821507 Gas flow diverter |
| 04/18/1989 | US4821473 To reduce chimney fires and handle smoke |
| 02/23/1989 | DE3727196A1 Duct branching |
| 01/12/1989 | DE3721725A1 Facility for cleaning flue gases in heating systems |
| 01/03/1989 | CA1247956A1 Flue restrictor |
| 12/21/1988 | CN88103171A Gas flow diverter |