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. 14, 2017
Filed:
Aug. 01, 2013
Kazuhiko Yoshida, Shizuoka, JP;
Masafumi Osugi, Shizuoka, JP;
Kenta Yamazaki, Shizuoka, JP;
Masato Chokyu, Shizuoka, JP;
Rikuou Takagi, Shizuoka, JP;
Kazuhiko Yoshida, Shizuoka, JP;
Masafumi Osugi, Shizuoka, JP;
Kenta Yamazaki, Shizuoka, JP;
Masato Chokyu, Shizuoka, JP;
Rikuou Takagi, Shizuoka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
Provided is a cage () for a constant velocity universal joint, which is formed into a ring shape with a substantially uniform thickness, including a plurality of pockets () formed in a circumferential direction of the cage (), for receiving torque transmitting balls, respectively, the cage () being formed of carbon steel including 0.41 to 0.51 mass % of C, 0.10 to 0.35 mass % of Si, 0.60 to 0.90 mass % of Mn, 0.005 to 0.030 mass % of P, and 0.002 to 0.035 mass % of S, with the balance being Fe and an element inevitably remaining at the time of steelmaking and refining, the cage () being subjected to carburizing, quenching, and tempering as heat treatment, each of the plurality of pockets () having a side surface () finished after the heat treatment.