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:
Apr. 23, 2013
Filed:
Mar. 21, 2008
Applicants:
Hironori Yamamoto, Toyokawa, JP;
Takayuki Matsushita, Toyokawa, JP;
Inventors:
Hironori Yamamoto, Toyokawa, JP;
Takayuki Matsushita, Toyokawa, JP;
Assignee:
OSG Corporation, Toyokawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23G 5/06 (2006.01); B23G 7/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A thread forming tap having a complete thread portion, formed with a predetermined back taper with that decreases rotational torque during tapping work, which reduces load acting on first complete protruding portions, formed at an extreme leading end of the complete thread portion, and thereby suppressing degradation in service life of the tool due to wear.