Patent ID: 7861707
Filing Date: 2011-01-04
Classification: F23B,F24B

Abstract:
1. A pellet stove, comprising: a vent tube having a first end, a second end, a top side and a bottom side, said top side having an upper vent feed opening, said bottom side having a lower vent feed opening; means at said first end of said vent tube for closing said first end of said vent tube; a feed tube extending upwardly from said top side of said vent tube, said feed tube defining a fuel chamber, said fuel chamber disposed above said upper vent feed opening; means attached to said feed tube for discharging pellet fuel into said fuel chamber; a primary combustion area at said first end of said vent tube, said primary combustion area comprising a burn unit having a first end, a second end and a pellet receptacle disposed therebetween, said pellet receptacle having one or more side walls and a bottom wall with one or more receptacle openings, said pellet receptacle defining a primary burn chamber configured to receive said pellet fuel from said fuel chamber, said burn unit removably received through said first end of said vent tube and positioned in said vent tube so as to dispose said primary burn chamber between said upper vent feed opening and said lower vent feed opening, said closing means disposed at said first end of said burn unit; a secondary combustion area comprising a burn box disposed below said lower vent feed opening, said burn box defining a secondary burn chamber configured to receive said pellet fuel from said primary burn chamber, said burn box having one or more air openings for receiving air into said secondary combustion area and said primary combustion area; one or more vent openings on said vent tube, said one or more vent openings disposed between said primary combustion area and said second end of said vent tube; and means associated with said vent openings for controlling said vent openings, said controlling means configured to selectively open and close one or more of said vent openings, wherein an air path is established from said air openings to said secondary combustion area, said primary combustion area and then said vent tube so as to exit said second end of said vent tube and wherein said controlling means increases air velocity along said air path by closing said one or more of said vent openings so as to increase heat produced by said pellet stove and decreases air velocity along said air path by opening said one or more of said vent openings so as to decrease heat produced by said pellet stove.