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:
May. 17, 2016
Filed:
Jul. 10, 2013
Harmonic Drive Systems Inc., Tokyo, JP;
Xin Yue Zhang, Azumino, JP;
Yoshihide Kiyosawa, Azumino, JP;
HARMONIC DRIVE SYSTEMS INC., Shinagawa-Ku, Tokyo, JP;
Abstract
A wave generator () for a flat-type strain wave gearing () has a first elliptical outer circumferential surface (S) of a first wave generator portion (S) defined by a first elliptical curve (C), and a second elliptical outer circumferential surface (D) of a second wave generator section (D) defined by a second elliptical curve (C). Compared to using a wave generator for which the contour is defined by a single elliptical curve, differences between the ball load distribution of the first wave generator portion (S) and the ball load distribution of the second wave generator portion (D) can be suppressed, both ball load distributions can be equalized, and the equivalent ball load can be reduced; therefore, an increase in the lifespan of the wave generator bearing can be achieved.