Core bar for bending of a pipe and method of bending of a pipe

Details Core bar for bending of a pipe and method of bending of a pipe Core bar for bending of a pipe and method of bending of a pipe

2006-10-31

2006-10-31

Banks, Derris H. (Department: 3725)

Metal deforming

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

By individually non-deforming clamps

C072S369000, C072S466200

Reexamination Certificate

active

07127928

ABSTRACT:
A core bar for bending of a pipe and a method of bending of a pipe are provided whereby collapse of the pipe can be prevented and bending can be automated at low cost. Ends of the respective core bar portions are formed such that, when the ends of the two cylindrical core bar portions are engaged telescopically, and one core bar portion is bent at a desired angle with respect to the other core bar portion, the outside circumferential surface of the bending region that is formed by these core bar portions becomes a curved surface along the generating line.

REFERENCES:
patent: 1324940 (1919-12-01), Theberath
patent: 4123930 (1978-11-01), Hill et al.
patent: 4315423 (1982-02-01), McGuire
patent: 4352285 (1982-10-01), LaRue et al.
patent: 6347539 (2002-02-01), Sekido
patent: 08-019821 (1996-01-01), None

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