Solid fuel heater with blowback prevention means
AssigneeMcNeil Corporation
InventorNolan J. Webb
Life of this patent
Estimating the term…
Abstract
A solid fuel burning heater has an inner combustion chamber housing enclosed within an outer housing with a fuel feed door in the inner combustion chamber housing being aligned with an outer housing door; an air inlet in the bottom of the combustion chamber housing has a thermostatically controlled air inflow closure valving member connected to a wire bail having an upper end encircling a cam rod connected to the outer housing door. Opening movement of the outer housing door moves the cam rod so that the air inflow closure valving member is opened to provide combustion air into the combustion chamber and prevent blowback upon the subsequent opening of the fuel feed door.
Claims12
A solid fuel burning heating unit comprising a closed combustion chamber having a fuel feed door movable between an open position and a closed position, combustion air inflow control means for varying the flow of combustion air into said closed combustion chamber and an outer housing enclosing said closed combustion chamber with the outer housing having an outer housing door permitting access to the fuel feed door and camming means connected to said combustion air inflow control means for insuring that said combustion air inflow control means is positioned to permit the inflow of substantial quantities of air into said combustion chamber door when said outer housing door is opened.
A solid fuel burning heating unit comprising a closed combustion chamber housing having a fuel feed door movable between an open position and a closed position, combustion air inflow valving means for varying the flow of combustion air into said closed combustion chamber housing and an outer housing enclosing said closed combustion chamber housing to define a space between the outer housing and the combustion chamber housing with the outer housing having an outer housing door permitting access to the fuel feed door, thermostat means connected to said combustion air inflow valving means for actuating said combustion air inflow valving means to vary the inflow of air into said combustion chamber in accordance with the temperature of the space between the combustion chamber and the outer housing and camming means operable in response to the opening of said outer housing door for moving said valving means to an open position if said valving means is near a closed condition when said outer housing door is opened.
Dependencies are inferred from the claim text.