F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
158/22
F23D 14/52 (2006.01) F23C 7/06 (2006.01)
Patent
CA 1141650
ABSTRACT OF THE DISCLOSURE A novel burner, e.g. for a gaseous fuel is provided herein. The burner includes a combustion nozzle housing having an axial gaseous fuel inlet and a plurality of radial combustion-supporting gas inlets and an axial nozzle. The burner also includes a novel self-cooling shield having a pair of spaced-apart inner and outer concentric unapertured tubular mem- bers secured to, and projecting from, the forward end of the nozzle housing, providing an axially extending annular chamber therebetween, the annular chamber having an open forward end and communicating with a radially extend- ing closed ended rear annular zone, the outer tubular member being open at its forward end, and closed at its rear end, and the inner tubular member being open at both its forward end and its rear end, the inner tubular member extending axially outwardly beyond the forward end of the outer tubular member, whereby cooling air is drawn in laminar flow into the annular chamber from the open end thereof to the rear annular zone and is expelled along with hot gaseous products of combustion through the inner tubular member. Thus cooling air is drawn in laminar flow into the annular chamber and is expelled along with the hot gaseous products of combustion through the inner tubular member. As well, preheated combustion-supporting gas (e.g. air) is admitted to the air inlets after passing rearwardly with- in the annular chamber. Thus the torch not only is a self-cooling, hand- held, propane torch, but also the combustion is more efficient because of the preheating of the air.
355902
Barisoff Leonard M.
Borden Ladner Gervais Llp
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