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.:
Date of Patent:
Jun. 11, 2019
Filed:
Feb. 16, 2017
Nhk Spring Co., Ltd., Yokohama-shi, Kanagawa, JP;
Senri Moriyama, Yokohama, JP;
Satoshi Akiyama, Fujisawa, JP;
Masaya Komazaki, Yokohama, JP;
Go Nagayasu, Yokohama, JP;
Hideki Okada, Yokohama, JP;
Daisuke Yokota, Yokosuka, JP;
NHK SPRING CO., LTD., Kanagawa, JP;
Abstract
A vertical motion impeller-type shot peening device performs a second shot peening to a coil spring including first shot peening indentations. The vertical motion impeller-type shot peening device includes a workpiece holding mechanism including a lower end turn support and an upper end turn support, a stress applying mechanism which compresses the coil spring, a rotation mechanism, and a projection mechanism which includes a pair of vertically movable impeller units. A first rough surface including first shot peening indentations is formed on a part of end turn portions of the coil spring. A second rough surface including second shot peening indentations is formed on the entire surface of wire except for the first rough surface.