CUTTER FOR GAS-OXYGEN CUTTING OF METAL (VARIANTS) Russian patent published in 2003 - IPC

FIELD: welding technique, possibly in machine engineering for cutting metallic structures. SUBSTANCE: cutter includes head with pipes for supplying cutting and heating up oxygen and fuel gas. At outlet of head inner and outer mouthpieces with ducts for supplying combustible mixture are mounted. In one variant of invention said ducts are in the form of recesses on outer surface of inner mouthpiece, in other variant of invention said ducts are in the form of recesses on inner surface of outer mouthpiece. Above mentioned ducts have cross section narrowed from periphery to center. Lateral walls of ducts have involute profile and they may be inclined by angle 1 - 15 degrees relative to axis of mouthpiece. EFFECT: enhanced reliability, safety, increased useful life period of easy-to-use utter operating at high rates for accurately cutting large-thickness metal. 14 cl, 9 dwg