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:
Sep. 29, 2026
Filed:
Aug. 10, 2022
Ntn Corporation, Osaka, JP;
Taku Itagaki, Shizuoka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
In a tripod type constant velocity universal jointof a double roller type, a carbon content in a core portion of a tripod memberis set to 0.23 to 0.44%, and a hardened layerof a carburized layer is provided on the surface of a leg shaft. A first region P having a radius of curvature Ra in a cross section in a direction orthogonal to a joint axial direction including an axial line of the leg shaftand a second region Q having a radius of curvature Rb in a cross section in the joint axial direction including the axial line of the leg shaftare provided in an intermediate portionprovided between a body portionof the tripod memberand the leg shaft. Ra>Rb is set.