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. 16, 2015
Filed:
Jan. 25, 2013
Nhk Spring Co., Ltd., Yokohama-shi, Kanagawa, JP;
Akira Katsuyama, Yokohama, JP;
Takayuki Morishima, Yokohama, JP;
Takashi Yajima, Yokohama, JP;
Yuji Mori, Yokohama, JP;
Kotaro Nukui, Yokohama, JP;
NHK SPRING CO., LTD., Yokohama-shi, Kanagawa, JP;
Abstract
A coil wire material is bent by a first roll, a second roll, and a third roll. The bent coil wire material is pressed in a screwing direction, to shape a coil spring having a desired diameter and a pitch. A desired pitch can be accurately formed in a manner that a second roll provided on a downstream side of a conveying direction of the coil wire material is configured to be able to move hack and forth along the screwing direction of the coil spring and to be tiltable about an axis of rotation parallel to the conveying direction of the coil wire material.