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| Number | Title | Issue Date |
| 6223737 | Pellet fuel burning device A pellet fuel burner, such as a cooking grill, has a fire box with a generally open top plane. A pellet burner unit is disposed in the fire box below the cooking surface. A pellet feeding device opens into the fire box and is disposed so as to feed pellet... | 05/01/2001 |
| 4669396 | Pellet burning system A furnace housing having a heat exchanger, an exhaust gas flue and an ash collecting bin therein. A burn chamber is provided in the housing with the heat exchanger being oriented in heat exchanging relation to the burn chamber. An inclined conduit extends... | 06/02/1987 |
| 4454828 | System for burning bio-mass pellets An upwardly inclined, auger motivated stoker tube moves bio-mass pellets from a reservoir to a depending stoker nozzle through which the pellets drop onto a burning head carried in a traditional fire chamber. A relatively small orifice in the stoker nozzl... | 06/19/1984 |
| 4421040 | Furnace An improved process of the type wherein a fuel is first pyrolyzed in a chamber (14) and the resulting volatiles and non-volatiles then transferred to a combustion region (18) for burning, the improvement comprising temporarily storing at least a portion o... | 12/20/1983 |
| 4408547 | Heating boiler The invention concerns a heating boiler operating on solid, comparatively finely divided fuel, such as chips or peat, and which is used to produce hot water or steam. The boiler comprises a furnace, in which the grate consists of a shell-like burning bask... | 10/11/1983 |
