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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.

Patent No.:

US 8936236 B1

PDFFull Text
Date of Patent:
Jan. 20, 2015

Filed:

Sep. 28, 2010

Coil spring for automobile suspension and method of manufacturing the same

Applicants:

Tomohiro Nakano, Nagoya, JP;

Takayuki Sakakibara, Nagoya, JP;

Takanori Kuno, Nagoya, JP;

Shingo Mimura, Nagoya, JP;

Masami Wakita, Nagoya, JP;

Inventors:

Tomohiro Nakano, Nagoya, JP;

Takayuki Sakakibara, Nagoya, JP;

Takanori Kuno, Nagoya, JP;

Shingo Mimura, Nagoya, JP;

Masami Wakita, Nagoya, JP;

Assignee:

Chuo Hatsujo Kabushiki Kaisha, Nagoya-Shi, JP;

Attorneys:

J-Tek Law PLLC

Jeffrey D. Tekanic

Scott T. Wakeman

Primary Examiner:

Bradley King

Int. Cl.
CPC ...
F16F 1/06 (2006.01); C22C 38/34 (2006.01); C22C 38/04 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C22C 38/34 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01);
Abstract

A manufacturing method of a coil spring for an automobile suspension includes forming a material into a coil shape; performing a heat treatment step on the material; performing a warm shot peening step on the material, and performing a hot setting step on the material. By performing the warm shot peening step prior to the hot setting step, a stronger compressive residual stress is imparted in a direction along which a large tensile stress acts during actual use of the coil spring, thereby improving sag resistance and durability of the coil spring. A coil spring is also manufactured according to this method.

Find Patent Forward Citations

Nakano, Tomohiro. (2015). Coil spring for automobile suspension and method of manufacturing the same (U.S. Patent No. 8936236). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8936236

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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