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. 24, 2012
Filed:
Dec. 17, 2004
Applicants:
Minoru Ishijima, Iwata, JP;
Kenta Yamazaki, Iwata, JP;
Inventors:
Minoru Ishijima, Iwata, JP;
Kenta Yamazaki, Iwata, JP;
Assignee:
NTN Corporation, Osaka-Fu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16D 3/223 (2011.01);
U.S. Cl.
CPC ...
Abstract
An object of the present invention is to ensure the miniaturization, strength, durability, load-carrying capacity, and an operating angle of a constant velocity universal joint. Six ballsare disposed in the constant velocity universal joint. The ratio r1 (=PCD/D) between the pitch circle diameter PCD(PCD=2×PCR) of the balland the diameter Dthereof is set in a range of 1.5≦r1≦4.0. The ratio r2 (=D/PCD) between the outside diameter Dof an outer memberand the pitch circle diameter PCDof serrations (or splines)of an inner joint memberis set in a range of 3.0≦r2≦5.0.