| Patents for F22B 7 - Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body (352) |
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| 11/07/2001 | CN1074519C Miniature boiling water and vapour supply boiler with automatic water feeding |
| 09/19/2001 | CN2449057Y Large row pipe pressure free steam boiler |
| 05/29/2001 | US6237469 Gas powered pressureless steam cooker |
| 03/15/2001 | CA2318692A1 Pulsed air combustion high capacity boiler |
| 02/06/2001 | CA2129111C Combined heat and power apparatus |
| 01/17/2001 | EP0834039B1 Energy converter using imploding plasma vortex heating |
| 12/19/2000 | US6161506 Pulsed air combustion high capacity boiler |
| 11/30/2000 | WO2000071933A1 Annular tube heat exchanger |
| 09/12/2000 | CA2177454C Steam generator |
| 08/31/2000 | WO2000050811A1 Horizontal water-tube steam boiler with flame tube |
| 08/16/2000 | CN2392082Y Improved structure for return diversion of flue of heat supply complete set |
| 06/20/2000 | US6076518 Steam generator |
| 06/06/2000 | US6070559 Annular tube heat exchanger |
| 03/22/2000 | CN2370273Y 微压蒸汽锅炉 Micro-pressure steam boiler |
| 03/14/2000 | US6036475 Cyclonic type combustion apparatus |
| 12/14/1999 | US6000392 Steamer gas oven |
| 12/08/1999 | EP0698198B1 A process and apparatus for heating fluids employing a pulse combustor |
| 11/03/1999 | CN2347053Y High effective through-flow verticle fuel (gas) steam boiler |
| 10/20/1999 | CN2344649Y Full-automatic fuel steam generator |
| 10/05/1999 | US5963611 Steam separator, nuclear power generation plant, and boiler apparatus |
| 06/09/1999 | EP0834039A4 Energy converter using imploding plasma vortex heating |
| 03/24/1999 | CN2311695Y Multi-layer exchanging heat, inverted flue low-temperature balance arrangement combination energy-saving boiler |
| 03/18/1999 | DE19740501A1 Thermal load determination for flame reed |
| 11/25/1998 | CN2298423Y Improved structure of high-efficient boiler |
| 09/09/1998 | EP0863365A2 Steam generator |
| 07/29/1998 | CN1188966A Seperation device for gas and water, atomic energy generating equipment and boiler device |
| 07/15/1998 | CN2286278Y Single-drum vertical bypass flue rear-inclined reciprocating grate combustion coal boiler |
| 07/02/1998 | DE19654732A1 Large water boiler with flue gas recycling |
| 06/10/1998 | DE19754119A1 Steam separator with high hydrodynamic efficiency for nuclear power plant or fossil fuel boiler |
| 04/08/1998 | EP0834039A1 Energy converter using imploding plasma vortex heating |
| 02/18/1998 | CN1173607A Fire grate free industrial boiler with dual-pipe fin-shaped tower chamber |
| 07/02/1997 | CN2257350Y Multifunctional vertical boiler |
| 05/20/1997 | US5630368 Coal feed and injection system for a coal-fired firetube boiler |
| 04/02/1997 | CN2251096Y Energy-saving high-efficiency safety steam boiler |
| 02/05/1997 | CN2246749Y Water-heating pot with auxiliary water tube |
| 10/02/1996 | DE19511185A1 Boiler with large water chamber and reverse flow combustion chamber |
| 09/24/1996 | US5558046 Fire-tube boiler |
| 09/11/1996 | EP0629273B1 Flame tube boiler |
| 05/29/1996 | CN2228180Y Multi-functional, energy-saving easy-to-repair boiler |
| 04/11/1996 | WO1996010716A1 Energy converter using imploding plasma vortex heating |
| 02/28/1996 | EP0698198A1 A process and apparatus for heating fluids employing a pulse combustor |
| 02/01/1996 | WO1996002745A1 Motive fluid generator for power generation |
| 12/27/1995 | EP0689004A1 Watertube body, single flow steam boiler and convection heat recovery system |
| 12/12/1995 | US5473884 Combined heat and power apparatus |
| 07/04/1995 | US5429059 Retrofitted coal-fired firetube boiler and method employed therewith |
| 06/21/1995 | CN2201574Y Pressureless energy saving verticle boiler |
| 05/10/1995 | CN2196738Y Non-pressure oil, gas boiler |
| 03/22/1995 | CN2192805Y Automatic boiler without pressure |
| 03/08/1995 | CN1099856A Miniature boiling water and vapour supply boiler with automatic water feeding |
| 01/31/1995 | US5385120 Fluid heater |
| 12/21/1994 | EP0629273A1 Flame tube boiler. |
| 11/30/1994 | EP0626053A1 Combined heat and power apparatus |
| 11/24/1994 | WO1994027087A1 A process and apparatus for heating fluids employing a pulse combustor |
| 11/01/1994 | US5359966 Energy converter using imploding plasma vortex heating |
| 09/13/1994 | US5345759 Internal combustion and internally cooled steam engine and powering method |
| 06/23/1994 | WO1994014000A1 Combined heat and power apparatus |
| 11/04/1993 | DE4305569A1 Cleaning installation for polluted waste air - has steam boiler with convection heating faces surrounded by water, and combustion chamber communicating with convection faces. |
| 09/16/1993 | WO1993018339A1 Flame tube boiler |
| 09/16/1993 | DE4206969A1 Flame tube boiler for forming ash in fuel - has turn round chamber connected to one end and burner connected to other end with tubes for combustion gases |
| 08/03/1993 | CA1320875C Hot water system with atmospheric gas burner |
| 05/18/1993 | US5211704 Process and apparatus for heating fluids employing a pulse combustor |
| 12/30/1992 | CN2126370U Double-drum water-fire tube casing type boiler |
| 11/10/1992 | US5161488 System for purifying contaminated air |
| 09/30/1992 | CN2117531U Water boiler for producing steam and hot water |
| 08/26/1992 | CN1063928A Briquet-burning boiler |
| 05/06/1992 | EP0484280A2 A plant for the purification of pollutant containing air |
| 03/10/1992 | CA1296960C Water heater tank flushing device |
| 01/01/1992 | CN2092021U Verticle boiler with mechanical fire grate |
| 10/07/1991 | WO1991015712A1 Cyclone combustion apparatus |
| 09/11/1991 | CN2084558U High efficient multi-purpose constant pressure stove |
| 07/30/1991 | CA1286932C Compact modular hot water heater and tank |
| 07/09/1991 | US5029557 Cyclone combustion apparatus |
| 03/20/1991 | CN2073540U 立式锅炉 Vertical boiler |
| 02/05/1991 | US4989549 Ultra-low NOx combustion apparatus |
| 10/31/1990 | DE3914077A1 Boiler with large water space - has three flues of which two consist of bundles of turbulence tubes, which create, turbulence in flue gases and improve heat transfer |
| 07/11/1990 | CN1008767B Hot water heater and steam generator |
| 06/21/1990 | DE3842325A1 Multi-flue waste-heat boiler with additional firing means |
| 02/07/1990 | CN2052478U Vertical gas boiler |
| 11/14/1989 | US4879959 Swirl combustion apparatus |
| 09/26/1989 | US4869208 Compact modular fluid storage and heating system |
| 09/20/1989 | CN2044683U High-temp. infrared radiating boiler without fire box |
| 09/19/1989 | CA1259537A1 Combustion of halogenated hydrocarbons with heat recovery |
| 08/29/1989 | US4860695 Cyclone combustion apparatus |
| 06/28/1989 | EP0321611A1 Furnace tube for a radiation heating tube of an industrial oven |
| 05/18/1989 | WO1989004438A1 Swirl combustion apparatus |
| 04/13/1989 | DE3731916A1 Novel boiler for generating steam, warm water, or hot water |
| 04/12/1989 | CN2035858U Small vapour generator |
| 12/28/1988 | CA1247480A Heat exchanger, more particularly a vapour generator |
| 07/28/1988 | DE3701364A1 Fire-tube boiler |
| 05/26/1988 | DE3639194A1 Heat exchanger with furnace |
| 05/11/1988 | EP0266857A2 Cyclonic combustor and boiler incorporating such a combustor |
| 05/11/1988 | CN87201356U Ball form vertical type low pressure steam boiler with refractory firebridge |
| 01/13/1988 | CN86103653A Hot water heater and steam generator |
| 06/09/1987 | US4671213 Structural improvement in the burning chamber of a horizontal boiler |
| 03/04/1987 | EP0212245A1 Combustion of halogenated hydrocarbons with heat recovery |
| 12/09/1986 | US4627388 Horizontal fire tube boiler |
| 12/03/1986 | EP0203568A2 Hot water heater and steam generator |
| 09/23/1986 | US4612879 Hot water heater and steam generator |
| 07/22/1986 | CA1208087A1 Safety boiler with high efficiency |
| 04/29/1986 | US4584969 For use with a burner which produces hot gases |