Gas welding torch

Details Gas welding torch Gas welding torch

F - Mech Eng,Light,Heat,Weapons

23

D

158/19

F23D 14/40 (2006.01)

Patent

CA 1065242

ABSTRACT OF THE DISCLOSURE A welding torch. The torch has a hand piece. An oxygen conduit in the hand piece has a connection at its upstream end for connecting to an oxygen supply hose. There is a tubular oxygen director at its downstream end. The tubular oxygen director is in gas flow communication with the conduit. A gas mixing structure comprises at least one mixing member which defines, with the oxygen director, a primary mixing chamber. A combustible gas conduit in the hand piece has a connection at its upstream end for connec- ting to a combustible gas supply hose. Walls in the hand piece place the downstream end of the gas conduit into gas flow communication with the primary mixing chamber. The gas mixing structure comprises a gas mixture directing aperture having a length exceeding its diameter and walls that define a secondary mixing chamber of greater volume than the primary mixing chamber, a length which exceeds its diameter, and a diameter which exceeds that of the gas mixture directing apertures. A discharge nozzle is at the downstream end of the secondary mixing chamber. The oxygen director, primary mixing chamber, gas mixture directing aperture, secondary mixing chamber and nozzle all have a common polar axis. The torch is easy to use and has reduced prospects of blow-back.

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