External sleeve assisted tube bending

Details External sleeve assisted tube bending External sleeve assisted tube bending

2007-02-06

2007-02-06

Larson, Lowell A. (Department: 3725)

Metal deforming

By deflecting successively-presented portions of work during...

By use of work-contacting wiper and moving, work-holding form

C072S369000

Reexamination Certificate

active

10829514

ABSTRACT:
A method and apparatus for bending tubes particularly suited for bending thin-walled tubing into a tight radius bend. An external sleeve is used during the bending process which maintains the tube cross sectional area and tube wall thickness, thereby eliminating the need for a wiper die or an internal mandrel. In one embodiment the sleeve is split along its longitudinal axis.

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patent: 5765285 (1998-06-01), Buy et al.
patent: 5937686 (1999-08-01), Arai

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