Oxy-arc apparatus for cutting inside a pipe

Details Oxy-arc apparatus for cutting inside a pipe Oxy-arc apparatus for cutting inside a pipe

1976-12-22

1979-07-24

Goldberg, E. A.

Electric heating

Metal heating

Cutting or disintegrating

21912511, 266 55, B23P 100

Patent

active

041623835

ABSTRACT:
Disclosed herein is a device for cutting a pipe from the inside by the oxy-arc cutting technique. This device comprises, in combination, guide means for guiding the device proper inside a pipe subjected to cutting, fixing means provided with a plurality of claws adapted to be thrust radially from a cylinder in the direction of the inner wall of the pipe by the action of a piston actuated by the supply of a compressed fluid to the cylinder so as to hold the device immovable in position inside the pipe, and oxy-arc cutting means for cutting the pipe from the inside by the use of a covered hollow stick cutting rod rotated by a rotary shaft pierced through the center of the piston, with the exposed core of the cutting rod held in sliding contact under a fixed force with the inner wall of the pipe.

REFERENCES:
patent: 2208676 (1940-07-01), Kosman
patent: 2622327 (1952-12-01), Halonen
patent: 3207408 (1965-09-01), Thome et al.
patent: 3612808 (1971-10-01), Nelson

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