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:
Jun. 12, 2012
Filed:
Dec. 27, 2007
Applicants:
Mitsushige O-oka, Toyota, JP;
Yoshiki Kawasaki, Toyota, JP;
Mitsuhiko Shimomura, Toyota, JP;
Inventors:
Assignee:
O-Oka Corporation, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 55/17 (2006.01); B21D 22/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A helical gear having helical tooth portions of the helical gear being worked by a punch and a die having a land of a smaller distance between opposed working surfaces formed to be inclined than that of other portion, formed on predetermined portions in tooth directions of respective opposed working surfaces thereon, in which worked surfaces on both side of the helical tooth portions on the helical gear as a work are ironed by the land in response to the helical tooth portions passing through the land when the work is forged by the punch.