Self propelled internal pipe arching apparatus

Details Self propelled internal pipe arching apparatus Self propelled internal pipe arching apparatus

1988-06-03

1990-04-10

Larson, Lowell A.

Metal deforming

By relatively receding work-engaging tool-faces

72446, B21D 3920

Patent

active

049149393

ABSTRACT:
An internal pipe arching apparatus has a self propelled unit for ground supporting an elongated longitudinal beam along its length. The unit is adapted to drive the beam into a pipe along its axis and lift the beam to a pipe arching position. The beam has an internal pipe arching means mounted thereto for forcible arching of a pipe when said beam is in the arching position. The mobile unit provides means for transporting and controlling the pipe expansion means.

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