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. 15, 2015
Filed:
Feb. 28, 2012
Mika Kohara, Iwata, JP;
Tatsuro Sugiyama, Iwata, JP;
Natsuhiko Mori, Kuwana, JP;
Hiroyuki Noda, Kuwana, JP;
Takahiro Okuno, Kuwana, JP;
Hajime Asada, Kuwana, JP;
Mika Kohara, Iwata, JP;
Tatsuro Sugiyama, Iwata, JP;
Natsuhiko Mori, Kuwana, JP;
Hiroyuki Noda, Kuwana, JP;
Takahiro Okuno, Kuwana, JP;
Hajime Asada, Kuwana, JP;
NTN CORPORATION, Osaka, JP;
Abstract
A constant-velocity universal joint includes an outer joint member; an inner joint member arranged in an inside of the outer joint member; and torque transmitting members. At least one of the outer joint member and the inner joint member comprises track grooves that are engaged with rolling surfaces of the torque transmitting members. At least one of the components of the constant-velocity universal joint is formed of a metal sintered compact. The metal sintered compact has a relative density of 80% or more and less than 100%. The metal sintered compact comprises a hardened layer formed on a surface thereof through heat treatment. Among the components each formed of the metal sintered compact, a component having a ring shape is subjected to a cold rolling process.