Patent ID: 7810441

Claim:
A burner assembly comprising: (a) a housing having an air inlet; (b) a burner end having an opening; (c) a longitudinal axis, said longitudinal axis extending generally from the air inlet toward the burner end; (d) a motor; (e) an impeller mounted in the housing, said impeller being in fluid communication with the air inlet, operatively connected to the motor and adapted to direct air from the air inlet towards the burner end; (f) a coal tube, said coal tube being adapted to convey coal toward the burner end; (g) a coal inlet, said coal inlet being adapted to convey coal to the coal tube; (h) a first bluff body ring, said first bluff body ring being mounted at the burner end; (i) a second bluff body ring, said second bluff body ring being mounted at the burner end; (j) a third bluff body ring, said third bluff body ring being mounted at the burner end; (k) at least one flame bridge; said at least one flame bridge being disposed between the first bluff body ring and the second bluff body ring; and (l) an igniter mounted in the burner end, said igniter being adapted to ignite the air and fuel mixture in the burner end to produce a main flame.