Vermont Castings, Inc.

Richard S Blackburn

Vance R Smith

Stephen F Richardson

Allan S Wilker

Derik K Andors

Robert W Ferguson

William W Crossman, Jr

John H Guest

William A Byrne

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.

Pellet burning stove

Fireplace front

A gas log fireplace includes a firebox which defines a combustion chamber, a gas burner located within the firebox, an artificial log set, a log support member positioned on the gas burner, a heat exchanger connected to an exhaust gas outlet of the firebox and a convection chamber which surrounds the firebox and the heat exchanger for heating of room air. The gas burner is fabricated of a refractory fiber material. A combustible gas and primary air are mixed in a Venturi inlet tube of the gas burner. Highly aerated gas flows through front ports and top ports in the gas burner. Secondary air is directed to the front ports and the top ports to obtain highly efficient combustion and high heat output. The artificial log set, the support member and the gas burner define a partially enclosed cavity which is maintained at a high temperature during operation by reradiation from the artificial logs, the support member and the gas burner. The heat exchanger includes an interior rib configuration that provides efficient transfer of heat to room air.

Gas log fireplace with high heat output

Growing community of inventors

South Royalton, VT, United States of America

Richard S Blackburn