| Patents for F23L 17 - Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues (1,376) |
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| 11/24/1993 | EP0570369A1 A method of and a device for removing gas from a room space |
| 11/16/1993 | US5261389 Power vent for hot flue gas |
| 10/28/1993 | DE4302229A1 Chimney smoke-discharge head with tubular casing - has wind nozzles at intervals in casing with tongues sloping upwards towards inside |
| 10/28/1993 | DE4213081A1 Exhaust gas extractor for chimney pot mounting - uses fan on chimney top to extract exhaust from central flue around which fresh air is drawn |
| 10/26/1993 | US5255665 Power vent blower assembly for gas water heater |
| 10/20/1993 | EP0565886A1 Industrial chimney with acid protection device |
| 09/29/1993 | EP0562026A1 Balanced pressure solid fuel heating unit |
| 09/23/1993 | DE4218728A1 Incinerator chimney - has catalyst and suction fan wear chimney top after the filter |
| 09/15/1993 | CN2142175Y Draught fan |
| 08/24/1993 | US5237938 Mobile type medical refuse incinerating vehicle |
| 06/17/1993 | CA2076208A1 Wind-resistant heating appliance |
| 05/06/1993 | DE4135880A1 Chimney extension piece - has ventilation ring through which chimney pipe passes between latter and tubular extension component |
| 04/28/1993 | CN2131033Y Device for draught and exhausting fume |
| 03/10/1993 | EP0530587A2 Exterior wall casing for the combustion air and exhaust gas channels of an apparatus working with a burner system |
| 02/24/1993 | EP0528345A2 Rain deflecting diffuser cowling |
| 01/27/1993 | EP0524416A2 Industrial chimney with acid protection device |
| 01/20/1993 | EP0524012A2 Power vent blower assembly for gas water heater |
| 01/05/1993 | CA1312198C Treatment of waste and a rotary kiln therefor |
| 12/09/1992 | CN2124386U Multifunction hood |
| 11/25/1992 | CN2123011U Draught-inducing device for chimneys |
| 11/19/1992 | DE4115802A1 Tubular chimney-extension on building - accommodates tubular insert with top supporting flange and extending below it |
| 11/17/1992 | US5163508 Heat exchanger baffle system |
| 11/11/1992 | CN2121620U Dust draught fan for double cool kiln, oven |
| 10/27/1992 | US5158446 Combination pressure and temperature limit control for a fuel-fired, forced draft heating appliance combustion product exhaust system |
| 10/27/1992 | US5158069 Wind-resistant heating appliance |
| 10/20/1992 | CA1308972C System and apparatus for venting water heater |
| 09/08/1992 | US5145458 Method and apparatus for lifting gas streams to a great elevation in the atmosphere |
| 08/20/1992 | WO1992014100A1 A method of and a device for mechanically removing gas from a room space |
| 08/19/1992 | CN2113422U Miniature centrifugal smoke exhauster |
| 08/19/1992 | CN2113411U Wind-power inducing draught machine |
| 08/11/1992 | CA2003793C Pilot gas bypass system for fuel-fired furnaces |
| 07/31/1992 | CA2035300A1 Chimney hat |
| 07/23/1992 | WO1992012385A1 Device for causing open fireplaces to draw separately from the air in the room |
| 07/22/1992 | CN2110806U Static smoke draughting device |
| 07/22/1992 | CN2110790U Beam axial flow draught blower special for circular kiln |
| 07/08/1992 | CN1017372B Device for raising combustion thermal efficiency |
| 07/02/1992 | DE4042301A1 Chimney cover structure - has guide and covering cones for deflecting smoke and precipitation |
| 06/24/1992 | EP0491444A1 Combined burner air supply and combustion gas exhaust |
| 06/24/1992 | CN2108226U Simple windproof hood |
| 06/23/1992 | US5123360 Pellet stove with enhanced air circulation efficiency |
| 06/18/1992 | WO1992011493A1 Balanced pressure solid fuel heating unit |
| 06/18/1992 | CA2098592A1 Balanced pressure solid fuel heating unit |
| 06/16/1992 | US5122053 Apparatus and method for the combustion of liquid or gaseous fuels |
| 05/19/1992 | CA1300992C Venting system with natural convection cooling |
| 04/22/1992 | CN2102391U Draught fan |
| 04/21/1992 | US5105798 Heating efficiency and noise reduction enclosure |
| 04/21/1992 | CA1299041C Power vent |
| 04/09/1992 | DE4041055A1 Prefab. chimney top for building - has cover supported by projections on chimney wall and upwardly extending connecting piece in flue gas outlet area |
| 03/31/1992 | CA1314753E Space ventilation and chimney drafting device |
| 03/31/1992 | CA1298132C Space ventilation and chimney drafting device |
| 03/24/1992 | CA1297749C Direct-vented gas fireplace |
| 01/29/1992 | CN2094685U High-efficient smoke-eliminating burner for coal-throw machine boiler |
| 12/31/1991 | CA1293659C In-line power venter |
| 12/31/1991 | CA1293658C Power venter |
| 12/18/1991 | EP0461576A2 Industrial chimney with acid protection device |
| 12/10/1991 | US5070772 Venter |
| 11/14/1991 | WO1991017393A1 Anti back draft device for flue |
| 11/05/1991 | US5062354 Side wall vent/air termination unit for boilers |
| 10/30/1991 | CN2087744U Wind-induced air-draughting chimney cap |
| 10/12/1991 | CA2014455A1 Wildlife lockout |
| 10/09/1991 | CN2086379U Chimney brennschluss unit |
| 10/08/1991 | CA1290238C Operation of a pulse fired burner |
| 09/25/1991 | CN2085437U High pressure energy-saving draugh fan |
| 09/18/1991 | CN2085028U Efficient smoke-reducing scrubber for boiler wit coal throwing machine |
| 09/18/1991 | CN2084995U Domestic draught fan |
| 08/21/1991 | CN2083278U Draught device of vertical cement kiln |
| 08/20/1991 | CA1287780C Furnace inducer outlet elbow |
| 07/18/1991 | DE4001849A1 Chimney fitted with extension and fan - incorporates collar to reduce noise emitted by fan unit |
| 06/25/1991 | CA1285191C Furnace roof jack with pivoting flashing plate |
| 06/19/1991 | CN2079262U Effect increasing device for flue |
| 05/29/1991 | CN2077958U Stovepipe cap against smoke reversal |
| 05/29/1991 | CN2077917U Energy saving fans used for wheel-kiln doors specially |
| 05/07/1991 | US5012793 Power vented direct vent system |
| 04/24/1991 | CN1050925A Long axis series boil combustion-supporting suction blower |
| 04/16/1991 | US5007238 Apparatus for evaporating condensed liquid |
| 04/16/1991 | CA1283010C Wind-resistant outdoor heating appliance |
| 04/11/1991 | DE3932570A1 Chimney pot with inner and outer ducts - has end surface of inner duct wall sloping downwards in inward direction |
| 03/27/1991 | EP0418976A1 Chimney |
| 03/20/1991 | CN2073497U Horizontal long-shaft type domestic draught fan |
| 03/20/1991 | CN2073496U Full plastic sealed type draught fan |
| 03/13/1991 | EP0416999A1 Device for extracting gases |
| 03/13/1991 | CN2073090U Chimney draught fan |
| 03/13/1991 | CN2073089U High efficiency and low noise draught fan of boiler |
| 03/07/1991 | DE3929578A1 Chimney hood with deflecting cone - has central flue gas pipe surrounded by air inlet pipe and inverted cone above flue gas pipe deflecting gases outward through lit |
| 02/26/1991 | US4995375 Heat exchange pipes for a furnace system |
| 02/20/1991 | CN1049406A Method and device of raising combustion thermal efficiency |
| 02/06/1991 | EP0411078A1 Power vent |
| 12/18/1990 | US4978821 Reverse flow prevention device for combustion apparatus |
| 12/12/1990 | EP0290488A4 Treatment of waste and a rotary kiln therefor |
| 12/12/1990 | CN2067358U Wind-powered fire protection machinery |
| 12/05/1990 | EP0400757A2 Gas-fired heating apparatus |
| 12/04/1990 | CA1277171C Radial upblast exhaust fan apparatus |
| 11/07/1990 | EP0396294A1 Gas fired appliances and installations incorporating such appliances |
| 10/24/1990 | CN2064469U Domestic wind-breathing devices |
| 10/10/1990 | CN2063616U Energy-saving special induced draft fan for ring kiln |
| 09/05/1990 | EP0384921A1 Chimney cowl |
| 08/29/1990 | CN2061246U High-efficiency smokeless coal-fired machine |
| 08/22/1990 | CN2060848U Wind power combustion-supporting device |
| 08/15/1990 | CN2060519U Multiple blade discharge/intake |
| 08/09/1990 | WO1990008919A1 Power vent |