Apparatus for straightening pipe

Details Apparatus for straightening pipe Apparatus for straightening pipe

2007-01-09

2007-01-09

Lafson, Lowell A. (Department: 3725)

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

Clamp structure constitutes sole initial metal-deforming...

C072S370010, C072S020100

Reexamination Certificate

active

10994206

ABSTRACT:
A straightening apparatus for large diameter thick wall pipe has an expander head at one end of a beam inserted into the pipe and having a radially displaceable saddle positionable at any selected location along the beam. The saddle may be shifted along the beam by a linear actuator and the saddle applies a radial force to the inner wall of the pipe in a bending operation.

REFERENCES:
patent: 816451 (1906-03-01), Forwood
patent: 958517 (1910-05-01), Mettler
patent: 3077916 (1963-02-01), Vaughn
patent: 4574442 (1986-03-01), Dickinson et al.
patent: 4779445 (1988-10-01), Rabe
patent: 6457532 (2002-10-01), Simpson
patent: 6543552 (2003-04-01), Metcalfe et al.

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