F - Mech Eng,Light,Heat,Weapons – 23 – D
Patent
F - Mech Eng,Light,Heat,Weapons
23
D
158/31
F23D 14/48 (2006.01)
Patent
CA 1309012
ABSTRACT OF THE DISCLOSURE A nozzle assembly for use in a hot air torch wherein the hot air torch utilizes a source of compressed air and a source of gaseous fuel. The hot air torch has a handle portion which holds a first pipe carrying pressurized air and a second pipe carrying propane under pressure. The first pipe containing pressurized air splits into two passageways, each passageway having a valve with which flow can be regulated. As propane travels through the second pipe to an exhaust outlet nozzle, pressurized air travels into a burner tube and an annular plenur surrounding the burner tube. The burner tube has circumferentially spaced openings. The compressed air from the plenum goes through the openings and travels radially inwardly toward the exhaust nozzle. The exhaust nozzle has a generally frusto-conical shaped exterior side surface to present a frusto-conical surface against which air jets from the circumferentially spaced openings in the burner tube impinge. The frusto-conical side surface and the radially inwardly positioned air jets cause the air to converge with and impinge upon the nozzle. Air in a swirling motion mixes effectively with the gaseous fuel providing rapid combustion at a position upstream from the nozzle.
578615
Brewer David
Uren John Russell
LandOfFree
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