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. 16, 2015
Filed:
Feb. 04, 2011
Shoichi Ishikawa, Yokohama, JP;
Noboru Takizawa, Azumino, JP;
Takahiro Arima, Azumino, JP;
Yusuke Shibamoto, Azumino, JP;
Shoichi Ishikawa, Yokohama, JP;
Noboru Takizawa, Azumino, JP;
Takahiro Arima, Azumino, JP;
Yusuke Shibamoto, Azumino, JP;
HARMONIC DRIVE SYSTEMS INC., Shinagawa-Ku, Tokyo, JP;
Abstract
In a wave gear device, an involute tooth profile with the low pressure angle α (<20°) is employed as a basic tooth profile of external teeth of a flexible external gear. In the principal section of the external teeth, the tooth depth thereof satisfies 2κmn=2(1+c) mn (deflection coefficient κ=1+c, 0<c<0.5), which is larger than the standard one. The shifting of the teeth which takes into account coning is performed along the tooth trace direction of the external teeth, so that straight portions of a rack tooth profile on the respective sections perpendicular to the axis in the tooth trace direction of the external teeth are conformed as viewed along the tooth trace direction. The rack tooth profile of the involute tooth profile is a straight line.