GAS WELDING TORCH Russian patent published in 1998 - IPC

FIELD: equipment for hand welding, soldering and heating ferrous and nonferrous metals; other types of flame machining. SUBSTANCE: device includes handle with oxygen and combustible gas supply passages; each passage is provided with adjusting valve; device also contains tube of end-piece with welding tip and mixer having oxygen and combustible gas inlet chambers and outlet mixing chamber. Ratios of areas of oxygen inlet chamber to sum of areas of combustible gas inlet chambers and area of mixing chamber of mixer are kept within the following limits: 1:0.9 - 3:4.5 - 7.5 and angle between combustible gas inlet chamber and oxygen inlet chamber of mixer ranges from 30 to 90 deg. Besides that, distance from end face of oxygen inlet chamber to nearest point of combustible gas inlet chamber of mixer and diameter of combustible gas inlet chamber of mixer are in the following relationship: L = (0.15 - 1)D, where L is indicated distance and D is diameter of combustible gas inlet chamber of mixer. EFFECT: enhanced efficiency. 2 cl, 3 dwg