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:
Mar. 04, 2014
Filed:
Aug. 29, 2008
Shoichi Ishikawa, Yokohama, JP;
Shoichi Ishikawa, Yokohama, JP;
Harmonic Drive Systems Inc., Shinagawa-Ku, Tokyo, JP;
Abstract
In a wave gear device (), radial deflection of a flexible external gear () is set at 2κmn (κ>1) which is larger than a normal deflection of 2nm (κ=1), and the tooth depth of both gears () is set larger than a standard tooth depth (in case of κ=1). Meshing movement locus of both gears () is approximated by a rack in case of κ>1, and using similarity-transformation curves (AC, AD) obtained by similarly enlarging a curve (AB) on the unmeshing side at the post-stage of meshing from the vertex (deepest meshing position)(A) of the movement locus (M), the dedendum tooth profile portion () of a rigid internal gear () and the addendum tooth profile portion () of the flexible external gear () are defined and then both gears () are brought into continuous contact.