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:
Apr. 28, 2009

Filed:

Jun. 17, 2004
Applicants:

Shizuo Kimura, Saitama, JP;

Kenzo Takeda, Utsunomiya, JP;

Ikuo Kato, Kumagaya, JP;

Yukio Uchiyama, Higashimtasuyama, JP;

Tadashi Goto, Hidaka, JP;

Nobuyuki Kakiya, Tochigi-ken, JP;

Kiyoshi Satou, Hamamatsu, JP;

Naotake Marui, Hamamatsu, JP;

Shinichi Ohnaka, Utsunomiya, JP;

Tatsuo Yamanaka, Hamamatsu, JP;

Jin Fukuda, Tochigi-ken, JP;

Taisei Wakisaka, Tochigi-ken, JP;

Haruo Machida, Saitama-ken, JP;

Inventors:

Shizuo Kimura, Saitama, JP;

Kenzo Takeda, Utsunomiya, JP;

Ikuo Kato, Kumagaya, JP;

Yukio Uchiyama, Higashimtasuyama, JP;

Tadashi Goto, Hidaka, JP;

Nobuyuki Kakiya, Tochigi-ken, JP;

Kiyoshi Satou, Hamamatsu, JP;

Naotake Marui, Hamamatsu, JP;

Shinichi Ohnaka, Utsunomiya, JP;

Tatsuo Yamanaka, Hamamatsu, JP;

Jin Fukuda, Tochigi-ken, JP;

Taisei Wakisaka, Tochigi-ken, JP;

Haruo Machida, Saitama-ken, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21K 1/38 (2006.01); B21D 39/02 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method of manufacturing a wheel rim by bringing end faces of a workpiece into abutment against each other to form a hollow cylindrical body and forming a circumferential recess which is depressed from an outer circumferential wall of said hollow cylindrical body toward an inner circumferential wall thereof, including providing protrusions disposed near ends of a joined area of the hollow cylindrical body and extending in a joining direction, and then pressing the outer circumferential wall of the hollow cylindrical body to form the recess.


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