Tool for restoring roundness to metal tubing

Details Tool for restoring roundness to metal tubing Tool for restoring roundness to metal tubing

1981-04-17

1983-06-28

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

Tool orbiting or rotating about an axis

72121, 72124, B21B 1912

Patent

active

043898670

ABSTRACT:
A frame bears a pair of laterally spaced lower rollers mounted for rotation about parallel axes within the base of the frame. An upper roller assembly is mounted for movement on the frame towards and away from the lower rollers and bears on the lower face thereof a pair of upper rollers mounted for rotation about parallel axes and positioned to generally overly the lower rollers. A hollow, soft metal tube inserted between the upper and lower rollers and maintained in contact with the rollers by lowering the upper roller assembly has tubing roundness restored during slow rotation of the tube about its axis and longitudinal shifting of the tube between the roller pairs.

REFERENCES:
patent: Re16220 (1925-12-01), Mirfield
patent: 365053 (1887-06-01), Daniels
patent: 2813442 (1957-11-01), Wingate
patent: 2975819 (1961-03-01), Costanzo et al.
patent: 3078744 (1963-02-01), Bronstein
patent: 3283553 (1966-11-01), Taylor

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