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:
Jan. 14, 2014
Filed:
Feb. 05, 2010
Takayuki Ohnuma, Tochigi, JP;
Tsutomu Ando, Tochigi, JP;
Yasuhiro Ito, Tochigi, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A preformed product of a crankshaft is formed in a shape smaller than a shape of a cavity of a separatable die setcomposed of an upper die and a lower die and is disposed in the cavity of the die setas a material M. The cavity of the die setmatches a required shape of the crankshaft. When the material M is disposed in the cavity of the die set, a clearance is formed between the material M and the cavity, and when a side-forming punchP is inserted into the material M, a hollow hole is formed in the material M and the cavity is filled with the material M. As a result, not only can weight saving be achieved by forming the hole in the crankpin of the crankshaft, but also degradation of dimensional accuracy by forming the hole can be avoided.