Bending machine and tube support and drive device thereof

Details Bending machine and tube support and drive device thereof Bending machine and tube support and drive device thereof

2006-07-18

2006-07-18

Larson, Lowell A. (Department: 3725)

Metal deforming

By use of roller or roller-like tool-element

With handling of, or guiding of, work or product relative to...

C072S369000

Reexamination Certificate

active

07076984

ABSTRACT:
A bending machine that includes a device that is used to drive and support a tube that is to be bent in relation to a bending head which is disposed at one end of a frame of the bending machine. The device includes a mandrel member that is solidly connected to an expandable member that is selectively applied against an inner wall of the tube to be bent and movement means that is used to align the mandrel member relative to a section of the tube to be bent during a bending step and that moves the expandable member to move the tube in translation and/or rotation between bending steps and when the expandable member is expanded to engage the inner wall of the tube.

REFERENCES:
patent: 2996100 (1961-08-01), Newhall et al.
patent: 3533266 (1970-10-01), Anderson
patent: 5823031 (1998-10-01), Campbell et al.
patent: 6009737 (2000-01-01), Bandy
patent: 6155091 (2000-12-01), Hayes et al.
Patent Abstracts of Japan, vol. 008, No. 166 (M-314), Aug. 2, 1984 & JP 59 061526 A (Mitsubishi Jukogyo KK), Apr. 7, 1984 abstract.

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