Self propelled internal pipe arching apparatus

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

1989-10-30

1990-12-04

Larson, Lowell A.

Metal deforming

By relatively receding work-engaging tool-faces

B21D 3920

Patent

active

049744402

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.

REFERENCES:
patent: 2696040 (1954-12-01), Crom et al.
patent: 2814326 (1957-11-01), Washabaugh
patent: 3074460 (1963-01-01), Huet
patent: 3201968 (1965-08-01), Hill
patent: 3877282 (1975-04-01), Pogonowski
patent: 3934448 (1976-01-01), Hand
patent: 3996783 (1976-12-01), Meserole

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