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:
Jan. 28, 2025
Filed:
Jun. 01, 2021
Harmonic Drive Systems Inc., Tokyo, JP;
Yuya Murayama, Azumino, JP;
HARMONIC DRIVE SYSTEMS INC., Tokyo, JP;
Abstract
According to a tooth profile designing method for a strain wave gear device, a first curve from a point A (φ=0) to a point B (φ=π/2) in a moving locus of external teeth with respect to internal teeth is extracted. A similarity curve is obtained by multiplying the first curve by (1−λ) using the point B as a center of similarity, and a second curve is obtained by rotating the similarity curve by 180° about a midpoint C between the point A and the point B as a center of similarity. A third curve is obtained by multiplying only the x-coordinate of the second curve by α (α<1), or a fourth curve is obtained by multiplying only the y-coordinate of the second curve by β (β>1). An addendum tooth profile of the external teeth is defined using the third curve or the fourth curve.