| Patents for F22B 5 - Steam boilers of drum type, i.e. without internal furnace or fire tubes, the boiler body being contacted externally by flue gas (271) |
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| 11/24/1993 | CN2147425Y Boiler for increasing evaporating rate or heating rate |
| 11/10/1993 | CN2145912Y High efficient energy saving fast non-pressure steam drinkingwater apparatus |
| 08/25/1993 | CN2141024Y Low-pressure steam boiler |
| 08/11/1993 | CN2140017Y Vertical no-pressure gas-heating boiler |
| 05/19/1993 | CN2133759Y Vapour drink machine |
| 05/19/1993 | CN2133758Y Heat pipe boiler |
| 05/05/1993 | CN2132078Y Multifunction energy-saving boiler |
| 12/23/1992 | CN2125769U Shaped coal needle tube steam boiler |
| 12/10/1992 | WO1992021916A1 Method and apparatus for controllably generating simulated smoke |
| 12/09/1992 | CN2124376U Small boiler endothermal body |
| 12/01/1992 | US5168544 Method and apparatus for controllably generating simulated smoke |
| 11/11/1992 | CN2121610U Normal pressure vertial small boiler |
| 10/14/1992 | CN2118894U Double wall forced circulation boiler |
| 09/09/1992 | CN2115459U Steam generator |
| 09/02/1992 | CN2114756U Warm wind boiler |
| 07/22/1992 | CN2110782U Multipurpose mini-boiler with three returns |
| 06/24/1992 | CN2108220U Atmospheric heat-tube boiler |
| 05/13/1992 | CN2104385U 重力控制的天平悬吊式小型蒸气锅 Balance suspended gravity-controlled small steam boiler |
| 04/08/1992 | CN2101176U Domestic steam stove |
| 03/18/1992 | CN2099247U Separation type coal-saving steam stove |
| 03/18/1992 | CN1015925B Inclined tube-type high-effective upright boiler with conical combustion chamber |
| 03/04/1992 | CN2097956U Multi-functional heat accumulation boiler |
| 01/29/1992 | CN2094680U Mechanical grate energy-saving smoke-eliminating boiler |
| 01/22/1992 | CN2093963U Boiler capable of firing inferior coal |
| 01/22/1992 | CN2093961U Natural draft horizontal boiler with double-deck grates |
| 11/27/1991 | CN2089570U Verticle automatic control oil (gas) burning boiler |
| 10/30/1991 | CN2087732U Combined double-bladder multipurpose boiler |
| 09/25/1991 | CN2085473U Domestic vaporization water heater |
| 08/28/1991 | CN2083688U Full-sealed radiation furnace |
| 03/27/1991 | CN2073976U Medium pressure cyclic bed special type boiler |
| 02/20/1991 | CN2071753U Direct heated type steam boiler |
| 01/16/1991 | CN2069526U Hot conduit shell type boiler |
| 12/26/1990 | CN2068214U Multi-functional water heater |
| 12/12/1990 | CN2067353U Separated type integrated production boiler for steam and water |
| 11/21/1990 | CN2066099U High-efficient energy-saving boiler |
| 09/05/1990 | CN2061647U Briquette-fired boiler |
| 07/18/1990 | CN1043985A Multi-functional boiler |
| 05/22/1990 | CA1269363A1 Spiral corrugated corrosion resistant heat exchanger |
| 04/18/1990 | CN1041439A Inclined tube-type high-effective upright boiler with conical combustion chamber |
| 12/27/1989 | CN2050132U Energy-saving device for boiler |
| 11/22/1989 | CN2048160U Single boiler-drum longitudinal whirlwind re-buring hearth of chain boiler |
| 09/27/1989 | CN2045055U Pot casing type boiler convex tube plate |
| 06/21/1989 | CN2039792U Multi-purpose high-efficient steam boiler |
| 05/31/1989 | CN2038596U Vertical bi-directional burning boiler |
| 05/31/1989 | CN2038595U Low pressure high temp. steam boiler |
| 05/24/1989 | CN2038193U Non-pressure open type boiler for hot water and heating facilities |
| 04/05/1989 | CN2035425U Three back stroke vertical boiler |
| 03/22/1989 | CN2034676U Waste heat recovery installation of bridge type doubk flow passage heating pipe |
| 03/15/1989 | CN2034235U Full-automatic-controlling boiler |
| 02/15/1989 | CN2032676U Sootless safety low-pressure steam furnace |
| 02/08/1989 | CN2032286U Vertical steam boiler with three combustion chambers |
| 10/26/1988 | CN87215963U Miniature steam boiler and relevant heating apparatus |
| 03/30/1988 | CN87209195U Energy-saving steam boiler with hot tube |
| 07/08/1987 | CN86201487U Horizontal quick-charged boiler with variant coals |
| 03/19/1987 | DE3532261A1 Steam generator |
| 02/26/1986 | CN85201341U Small-size low pressure steam stove with high efficiency |
| 12/24/1985 | CA1198328A1 Water heater |
| 11/21/1985 | EP0035550B1 Process for combustion of wood fuel and furnace and boiler system for carrying out said process |
| 09/17/1985 | CA1193487A1 Steam generator with integral down-draft dryer |
| 09/25/1984 | US4473351 Vertical feed stick wood fuel burning furnace system |
| 09/18/1984 | CA1174541A1 Solid fuel hot water heater |
| 05/29/1984 | CA1168120A1 Steam generator |
| 11/08/1983 | US4413571 Solid fuel hot water heater |
| 06/08/1982 | CA1125117A1 Vertical feed stick wood fuel burning furnace system |
| 01/26/1982 | EP0035550A4 Process for combustion of wood fuel and furnace and boiler system for carrying out said process. |
| 01/12/1982 | US4309965 Vertical feed stick wood fuel burning furnace system |
| 09/16/1981 | EP0035550A1 Process for combustion of wood fuel and furnace and boiler system for carrying out said process. |
| 03/19/1981 | WO1981000753A1 Vertical feed wood-type fuel furnace system |
| 12/11/1979 | CA1067774A1 Stock tank heater |
| 10/09/1979 | CA1063894A1 Attemperator |
| 12/19/1978 | US4130611 Attemperator |