Method of making pre-formed tubular members

Details Method of making pre-formed tubular members Method of making pre-formed tubular members

2006-12-05

2006-12-05

Larson, Lowell A. (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

Using fixed die

C072S369000, C072S466200

Reexamination Certificate

active

07143618

ABSTRACT:
A method of making a pre-formed tubular member includes the steps of providing a tubular member extending longitudinally and providing a bending assembly having a mandrel with at least one ball and a bending die. The method also includes the steps of positioning the at least one ball inside of the tubular member. The method further includes the steps of bending the tubular member about the bend die to form a bent pre-formed tubular member having at least one curved portion having a recess therein.

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