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:
Apr. 28, 2026
Filed:
Mar. 24, 2025
Tsubakimoto Chain Co., Osaka, JP;
Hirokazu Tsuneda, Osaka, JP;
TSUBAKIMOTO CHAIN CO., Osaka, JP;
Abstract
A cam clutch unit includes a plurality of cams and rollers. The rollers each include an axially extending shaft portion and a pair of large-diameter portions continuous with respective both ends of the shaft portion. The space between the pair of large-diameter portions forms a groove for an annular spring to fit in. The shaft portion forming the bottom surface of the groove has an outer circumferential surface that allows the spring to contact the groove at a central position in an axial direction of the groove. The outer circumferential surface is a curved surface so that the shaft portion increases in outside diameter monotonically from the central position in the axial direction of the groove towards the large-diameter portions.