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:
Feb. 12, 2013
Filed:
Mar. 25, 2010
Yasuhiro Ito, Tochigi, JP;
Takayuki Ohnuma, Tochigi, JP;
Tsutomu Ando, Tochigi, JP;
Yasuyuki Kondo, Tsuzuki-gun, JP;
Yasuhiro Ito, Tochigi, JP;
Takayuki Ohnuma, Tochigi, JP;
Tsutomu Ando, Tochigi, JP;
Yasuyuki Kondo, Tsuzuki-gun, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Nichidai Corporation, Kyoto, JP;
Abstract
The present invention provides a production apparatus for crankshaft, including: a die which has a lower die, an upper die, and plural side forming punches, the upper die being provided movably to the lower die, the side forming punches moving perpendicularly to a movement direction of the upper die; a press ram which moves the upper die to the lower die, closes a material of the crankshaft, and forms the material; cam mechanisms which are provided for the side forming punches and which move the side forming punches to an inside portion of the die in accordance with movement of the press ram; a grade separation structure which is provided to at least one of the side forming punches in order to prevent interference of the side forming punches with each other.