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:
Oct. 14, 2025
Filed:
Jan. 18, 2022
Applicant:
Harmonic Drive Systems Inc., Tokyo, JP;
Inventor:
Norio Shirokoshi, Azumino, JP;
Assignee:
HARMONIC DRIVE SYSTEMS INC., Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16H 57/04 (2010.01);
U.S. Cl.
CPC ...
F16H 57/0431 (2013.01);
Abstract
In each of tooth tip surfaces of internal teeth of an internally toothed gear and external teeth of an externally toothed gear of a strain wave gearing, lubricant passage grooves are formed at fixed intervals along the tooth trace direction. Each of the lubricant passage grooves is an inclined groove that extends in a direction inclined to one side in the tooth trace direction. The inclined grooves facilitate the flow of the lubricant such as grease confined in gaps between the internal teeth and the external teeth and thus the lubricant is efficiently supplied to the tooth surfaces of both teeth.