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:
Jun. 07, 2022
Filed:
Mar. 08, 2018
Ntn Corporation, Osaka, JP;
Tomoshige Kobayashi, Shizuoka, JP;
Masazumi Kobayashi, Shizuoka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
A fixed type constant velocity universal joint () includes an outer joint member (), an inner joint member (), eight balls (), and a cage (). A curvature center (O) of track grooves () of the outer joint member () and a curvature center (O) of track grooves () of the inner joint member () are offset to opposite sides in an axial direction of the joint with respect to a joint center (O(f)) by an equal distance. A ratio (PCD/D) of a pitch circle diameter (PCD) of the balls () to a diameter (D) of each of the balls () is set from 3.70 to 3.87. A ratio (T/D) of a radial thickness (T) of the cage () to the diameter (D) of each of the balls () is set from 0.22 to 0.25.