The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Nov. 12, 2013

Filed:

Jan. 15, 2010
Applicant:

Yoshiharu Watabe, Iruma, JP;

Inventor:

Yoshiharu Watabe, Iruma, JP;

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C21D 9/40 (2006.01); B21D 26/02 (2011.01);
U.S. Cl.
CPC ...
Abstract

A ring supporting device is provided with six support shafts capable of approaching and separating from the inner walls of metal rings. Each of the support shafts has an exposed side wall having formed thereon annular ridges and grooves. The side walls of the support shafts each have cushioning materials having a height substantially corresponding to the height of each of the grooves. The cushioning materials deform when the inner walls of the metallic rings make contact with the cushioning materials, and this relaxes a force which tries to expand the metallic rings from the inner wall side to the outer wall side.


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