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. 09, 2015
Filed:
Jun. 13, 2014
Enplas Corporation, Saitama, JP;
Yasushi Kajiwara, Saitama, JP;
Enplas Corporation, Saitama, JP;
Abstract
A half of a tooth right-angled cross-sectional shape in a tooth bottom side area of a tooth divided at a tooth bottom center is defined by a first involute portion extending from the tooth bottom center Ptoward a tooth surface, an arcuate portion connected smoothly to the first involute portion, a second involute portion connected smoothly to the arcuate portion, a third involute portion connected smoothly to the second involute portion, and a tooth surface connecting curved portion connecting the third involute portion and the tooth surface smoothly. Radii of curvature of the arcuate portion and the first, second and third involute portions are determined so that a stress variation width in a stress state of a so-called partly reverse state caused by tensile stress and compression stress generated in the tooth bottom side area of the tooth before and after the meshing of the tooth can be uniformized.