| Patents for F23J 11 - Devices for conducting smoke or fumes, e.g. flues (1,444) |
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| 12/04/1997 | DE19707340A1 Combustion gas routing method for steam heating boiler |
| 11/19/1997 | CN2268190Y Compound pipeline for drawing high-temp. flue smoke of thermal plant boiler |
| 09/10/1997 | EP0794385A1 Exhaust piece for connecting a central heating apparatus to an open stack |
| 09/10/1997 | CN2262172Y Fire-proof dust reducing and smoke exhausting device |
| 08/26/1997 | CA2139918C Smoke exhauster having cleaning device |
| 07/30/1997 | CN2258585Y Double-layer iron chimney capable of utilizing waste heat |
| 07/09/1997 | CN2257596Y Built-in forced air exhaust device for water heater |
| 07/09/1997 | CN2257595Y Forced air exhaust device for water heater |
| 05/20/1997 | US5630751 Firehouse exhaust recovery system |
| 05/14/1997 | EP0773403A1 Power plant |
| 03/26/1997 | EP0764816A1 Draught limiting and injection device |
| 01/30/1997 | WO1997003321A1 Firehouse exhaust recovery system |
| 11/06/1996 | CN2239606Y Local fume exhaust cover for d.c electric arc furnace |
| 12/06/1995 | EP0685689A1 Combined air supply and combustion gas discharge system for closed type combustion appliances |
| 10/21/1995 | CA2121734A1 Improved flue for fuel or wood burning appliance |
| 10/19/1995 | DE19513002A1 Flue for multiple gas appliances |
| 06/22/1995 | DE4342549A1 Self=operating siphon in flue of heating boiler |
| 06/21/1995 | CN2201580Y Special dust collector for chimney |
| 06/06/1995 | US5421774 Exhaust vent adapter for use with multiple heating units |
| 05/17/1995 | CN2197578Y Purifier for boiler tail gas |
| 04/12/1995 | CN2194455Y Vapour-eliminating and dust-removing device for boil |
| 03/24/1995 | CA2106811A1 Duct sealing apparatus and ducting system |
| 03/01/1995 | CN2190743Y High efficiency fume exhausting fan |
| 01/04/1995 | CN2186863Y Verticle sucking-tube cooker hood |
| 11/23/1994 | CN2183503Y Filtering device for kitchen-hood |
| 09/28/1994 | EP0617233A1 Incinerator with auxiliary gas evacuation system |
| 09/21/1994 | CN2177882Y Rolling suction type fume extractor |
| 09/07/1994 | CN2176490Y Improved effective hood |
| 09/07/1994 | CN1025819C Laser therapeutic instrument with smoke eliminated by itself |
| 09/01/1994 | DE4305998A1 Supply-air and waste-gas guide apparatus for fuel-heated heat sources |
| 08/17/1994 | CN2174639Y Top-sucking smoke and fume removing apparatus outside of furnace |
| 08/16/1994 | US5337728 Liquid heating apparatus |
| 08/02/1994 | US5334095 Rotary coupler with shaft misalignment and overtravel tolerance |
| 08/02/1994 | US5334092 Duct sealing apparatus and ducting system |
| 07/12/1994 | US5328354 Incinerator with auxiliary gas evacuation system |
| 07/01/1994 | CA2111907A1 Rotary coupler with shaft misalignment and overtravel tolerance |
| 04/13/1994 | CN2161829Y Range hood fan with extracting and discharging function |
| 04/13/1994 | CN2161828Y Ventilating flue |
| 04/13/1994 | CN1085120A Method and smokestack for condensing and purifying combustion gas |
| 03/23/1994 | CN2159507Y Flow guiding chimney |
| 03/16/1994 | CN2158969Y Multifunction smoke-fume conducting apparatus |
| 01/26/1994 | CN2154402Y Houshold cooker hood with circuit air screen |
| 12/29/1993 | CN2151370Y Cooker hood |
| 12/15/1993 | CN1079546A Method for making glass fiber reinforced cement smoke flue |
| 12/08/1993 | EP0332695B1 Catalytic space heater |
| 11/17/1993 | CN2146661Y Hood of oil soot extactor |
| 11/17/1993 | CN2146660Y Pollutionless oil soot extractor |
| 11/10/1993 | CN2145919Y Automatic monitor for cooker hood |
| 11/10/1993 | CN1078303A Liquid heating apparatus |
| 11/03/1993 | EP0568286A1 Liquid heating apparatus |
| 11/03/1993 | CN2145321Y Vertical cooker hood |
| 09/29/1993 | CN2142930Y Fixation struction for capacity of oil-fume exhauster |
| 09/22/1993 | CN2142332Y Smoke remover for surgical laser implement |
| 09/15/1993 | CN2142174Y Safety net cleaning device for smoke or fumes exhauster |
| 08/18/1993 | CN2140217Y Medical smoke exhauster |
| 08/11/1993 | EP0555055A2 Regenerative thermal oxidizer with inlet/outlet crossover duct |
| 07/28/1993 | EP0552691A1 Construction system for realizing double-walled chimneys as well as ducts for exhaust of gases and steam |
| 07/28/1993 | CN2139218Y Clean type fume exhauster |
| 07/21/1993 | CN2138751Y Flue valve |
| 07/14/1993 | CN2138252Y Automatic arc welding smoke controller of welding machine |
| 06/30/1993 | CN2137325Y Guiding-jetting-type greasy smoke exhaustor |
| 06/23/1993 | CN2136940Y Unpowered automatic device for conducting smoke or fumes |
| 06/22/1993 | US5221522 Miniature design for efficiency purification of exhaust gases |
| 06/09/1993 | CN2135726Y Moving type encentric rotating smoke exhauster |
| 06/02/1993 | CN2135108Y Oil soot extractor |
| 05/06/1993 | DE4237134A1 Multi-floor-building exhaust pipe system - has condensate drains from heater burners connected to common down-pipe |
| 05/05/1993 | CN2132088Y Joint for smell-blocking tube of lamblack extractor |
| 04/14/1993 | CN2129885Y Self-cleaning, gire-proof smoke exhauster |
| 04/14/1993 | CN2129884Y High efficient, low noise smoke exhausting fan |
| 04/14/1993 | CN2129883Y Smoke exhausting fan which closing gas stove |
| 04/07/1993 | CN2129380Y Cooker hood with gas curtain |
| 03/03/1993 | CN2127764Y Cleaning device for sealed oil soot extractors |
| 02/24/1993 | CN2127461Y Bellows of cooker hood |
| 02/24/1993 | CN2127460Y Side-conducting cooker hood |
| 01/20/1993 | CN2126591Y Water suction shaft sleeve for cleaning device of fume exhauster fan |
| 12/23/1992 | CN2125776U Bitumen smoke exhauster |
| 12/23/1992 | CN2125775U Hood-lifting smoke exhauster |
| 12/16/1992 | CN2125071U Fume and oil exhuaster with telescopic hole |
| 12/09/1992 | CN2124384U Cooker hood fan cooperated with any one or more of cooker's burners |
| 12/02/1992 | CN2123689U Discharge interface with selectable |
| 12/02/1992 | CN2123688U Washing device for smoke exhauster |
| 12/02/1992 | CN2123687U Cover for wind port |
| 11/25/1992 | CN2123009U Cabinet-type oil soot extractor |
| 11/24/1992 | US5165732 Gas appliance connection |
| 11/18/1992 | CN2122317U Fume extracting megaphone |
| 11/18/1992 | CN2122316U Filtering cooker hood |
| 11/11/1992 | CN2121618U Folding exhaust cover |
| 11/04/1992 | CN2120960U Exhaust cooker hood |
| 10/21/1992 | CN2119575U Full automatic extractor for cigarette smoke |
| 10/21/1992 | CN2119574U Automatic fume extracting valve |
| 10/21/1992 | CN2119573U Oil vapour extractor with easily cleaning wind wheel type |
| 10/21/1992 | CN2119572U Swinging angle regulating mechanism for fume extractor |
| 10/14/1992 | CN2118901U Directive drawing fan with oil collector |
| 10/07/1992 | EP0507167A2 Flue gas conduit in a boiler |
| 10/07/1992 | CN2118238U Grooved exhausting cover with jet function |
| 10/06/1992 | CA2041709A1 Gas appliance connection |
| 09/30/1992 | CN2117536U Hood of exhaust fan |
| 09/08/1992 | US5145458 Method and apparatus for lifting gas streams to a great elevation in the atmosphere |
| 08/12/1992 | CN2112751U Temp. difference type smode exhauster |
| 07/23/1992 | WO1992012302A1 Flue and lifting and shifting device for assembling and dismantling it |