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:
Nov. 23, 2010
Filed:
Jan. 09, 2008
Xin Yue Zhang, Azumino, JP;
Keiji Ueura, Azumino, JP;
Xin Yue Zhang, Azumino, JP;
Keiji Ueura, Azumino, JP;
Harmonic Drive Systems Inc., Tokyo, JP;
Abstract
A flat type wave gear device is realized having a much improved load capacity. When d is an amount of radial flexing at a major axis location of a rim neutral circle of the flexible external gear of a flat type wave gear device flexed into an elliptical shape and t is the rim thickness of the flexible external gear, then(0.5237 Ln()−1.32)≦(0.8728 Ln()−2.2)when the reduction ratio R of the wave gear device is less than 80, and(1.5499 Ln()−5.8099)≦(2.5832 Ln()−9.6832)when the reduction ratio R of the wave gear device is 80 or more. Using this setting makes it possible to increase the tooth root fatigue limit strength of the flexible external gear, thereby making it possible to improve the load capacity of the flexible external gear.