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:
Mar. 11, 2014
Filed:
Sep. 14, 2012
Applicant:
Takashi Eto, Ichihara, JP;
Inventor:
Takashi Eto, Ichihara, JP;
Assignee:
Mitsubishi Steel Mfg. Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21F 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A coil spring forming apparatus including a core barwhich rotates around an axis thereof and on which a wire material W fed from a wire material-feeding means is wound; a clamping portionwhich rotates integrally with the core barand grips an end of the wire material W on the core bar; and first guide rollersand second guide rollersfor guiding the wire material W onto the core bar; wherein the first guide rollersand the second guide rollersare provided so as to move independently from each other in parallel with the axis of the core bar, and a coil spring formed by the above coil spring forming apparatus.