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:
Jul. 17, 2018
Filed:
Sep. 02, 2014
Applicant:
Chuo Hatsujo Kabushiki Kaisha, Nagoya-Shi, JP;
Inventors:
Assignee:
CHUO HATSUJO KABUSHIKI KAISHA, Nagoya-Shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
B21F 35/02 (2006.01); B21F 3/04 (2006.01);
U.S. Cl.
CPC ...
B21F 35/02 (2013.01); B21F 3/04 (2013.01);
Abstract
A method for forming a wire into a coil spring includes winding the wire around a coiling mandrel to form the wire into a cylindrical coil shape, clamping one end of the wire formed into the cylindrical coil shape, clamping an intermediate portion of the wire spaced from the clamped one end of the wire; and moving the clamped one end of the wire relative to the clamped intermediate position at least in an axis direction of the cylindrical coil shape, whereby a pigtail having a desired shape is formed.