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:
Mar. 01, 2011

Filed:

May. 09, 2006
Applicants:

Hiroshi Koyama, Yokohama, JP;

Koichi Tamatsu, Yokohama, JP;

Masato Sugawara, Yokohama, JP;

Jun Umeno, Yokohama, JP;

Hiroshi Machida, Yokohama, JP;

Hiroshi Masuya, Yokohama, JP;

Fumiaki Kimura, Yokohama, JP;

Yasuaki Tsuji, Yokohama, JP;

Akihiro Katsuya, Yokohama, JP;

Takahiro Nakamura, Yokohama, JP;

Inventors:

Hiroshi Koyama, Yokohama, JP;

Koichi Tamatsu, Yokohama, JP;

Masato Sugawara, Yokohama, JP;

Jun Umeno, Yokohama, JP;

Hiroshi Machida, Yokohama, JP;

Hiroshi Masuya, Yokohama, JP;

Fumiaki Kimura, Yokohama, JP;

Yasuaki Tsuji, Yokohama, JP;

Akihiro Katsuya, Yokohama, JP;

Takahiro Nakamura, Yokohama, JP;

Assignee:

NHK Spring Co., Ltd., Kanagawa, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D 9/08 (2006.01);
U.S. Cl.
CPC ...
Abstract

In a method of manufacturing a hollow stabilizer, a pipe compressing step of compressing an electroseamed pipe in a temperature range of a hot state or a warm state so as to make a rate of a thickness with respect to an outer diameter between 18 and 35% is performed, and a forming step of forming the compressed electroseamed pipe in a stabilizer shape in a cold state is executed. Next, a step of applying a heat treatment to a half-finished stabilizer is performed, a shot peening step of impacting a shot on the half-finished stabilizer is performed, and a step of coating the half-finished stabilizer is performed.


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