Abstract: A heating devices for complete intermixing of gaseous fuel and air to allow complete combustion of the gas and air mixture in a mushroom shaped flame. The device includes an element for supplying an axial flow of air and a swirling device in fluid communication with the air supply to turbulently swirl and radially inward direct the air entering from the air supply. The heating device also includes an nozzle element located within a mixing chamber formed by the swirling device. The nozzle forms a plurality of bores to emit the fuel as generally radially outward directed streams into the swirling stream of air exiting from the swirling device to intermixes the fuel and air. A disk connected to the nozzle restrains the gas streams within the mixing chamber to facilitate the mixing of the fuel and air. The intermixed fuel and air is then ignited by an ignition device. A combustion chamber is disposed about an upper first end of the swirling device to contain the generated flame.

Abstract: A device for improved combustion of gaseous fuel and air includes a tubular housing and has a combustion chamber disposed about the tubular housing. A first conduit extends from one end of the tubular housing for the passage of air therethrough. A second conduit extends coaxially through the first conduit and tubular housing and has a circular baffle cooperative therewith so as to retard the passage of air. A circular opening in the second end of the tubular housing has an annular baffle disposed therein to assist in retarding flow of air. A series of curvilinear fins are disposed in a spiral configuration between the circular baffle and the annular baffle so as to effect a swirling motion of air passing therethrough. An end cap is attached to the end of the second conduit with a circular baffle at one end of the end cap, an annular baffle at the other end and fins disposed therebetween. Gaseous fuel passes through the second conduit and the end cap.