Stoves and furnaces – Fireplaces or accessories – Hopper feed of solid fuel
Patent
1991-04-05
1992-08-11
Dority, Carroll B.
Stoves and furnaces
Fireplaces or accessories
Hopper feed of solid fuel
126 73, 126 77, 110110, 110286, F24B 1199
Patent
active
051370123
ABSTRACT:
A pellet burning stove includes a firebox defining a combustion chamber, a pellet burner located within the firebox, a feed system for moving combustible pellets to the pellet burner and an ash pan for receiving ashes from the pellet burner. The pellet burner includes a horizontal surface having an elongated combustion zone defined by a plurality of primary air openings in the burner surface, and a feed surface adjacent to the combustion zone. The feed system moves a thin layer of combustible pellets across the feed surface into the combustion zone. An air plenum surrounding the feed surface of the pellet burner supplies combustion air upwardly through the primary air opening and the layer of combustible pellets. The air plenum maintains the pellets relatively cool until they reach the combustion zone. Ashes drop off an edge of the burner surface into an ash pan. An artificial log set and a log support member fabricated of refractory fiber material define a secondary combustion cavity above the pellet burner. Secondary air is supplied through the air plenum of the pellet burner and from an air wash system that maintains a viewing window clean during operation. The feed system typically includes an auger and a pusher block which move pellets from a pellet bin to the pellet burner.
REFERENCES:
patent: 4474117 (1984-10-01), Marollaud
patent: 4522311 (1985-06-01), Ikeda
patent: 4683868 (1987-08-01), Ferguson et al.
patent: 4803973 (1989-02-01), Harman
patent: 4858536 (1989-08-01), Guest et al.
patent: 5018455 (1991-05-01), Harman
Andors Derik K.
Blackburn Richard S.
Crossman, Jr. William W.
Guest John H.
Wilker Allan S.
Dority Carroll B.
Vermont Castings, Inc.
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