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:
Aug. 21, 2018
Filed:
May. 09, 2014
Applicant:
Yasunaga Corporation, Iga-shi, JP;
Inventors:
Yuji Kaimasu, Iga, JP;
Jungo Matsui, Iga, JP;
Assignee:
Yasunaga Corporation, Mie, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23D 31/00 (2006.01); B23P 15/00 (2006.01); B23D 3/02 (2006.01); B23D 13/00 (2006.01); B26D 3/14 (2006.01);
U.S. Cl.
CPC ...
B23D 31/002 (2013.01); B23D 3/02 (2013.01); B23D 13/00 (2013.01); B23P 15/00 (2013.01); B23D 2031/005 (2013.01); B23P 2700/04 (2013.01); B26D 3/14 (2013.01); Y10T 29/4979 (2015.01); Y10T 29/49288 (2015.01); Y10T 29/49789 (2015.01); Y10T 29/49792 (2015.01); Y10T 29/49794 (2015.01); Y10T 29/49796 (2015.01); Y10T 74/2142 (2015.01); Y10T 83/0304 (2015.04);
Abstract
A method of forming a fracture start portion of a con rod for forming fracture start portions of a con rod at opposing positions in an inner peripheral surface of a large end of the con rod made of metal, includes a first step of forming a groove portion at a position corresponding to the fracture start portion by using a first insert tip with a large tip end and a second step of forming the fracture start portion, which has become a V-shaped groove, by machining a bottom portion of the groove portion smaller by using a second insert tip having a tip end smaller than the first insert tip.