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. 18, 2007
Filed:
Jun. 02, 2004
Applicants:
Hiroshi Murakami, Iwata, JP;
Chikara Ohki, Kuwana, JP;
Inventors:
Hiroshi Murakami, Iwata, JP;
Chikara Ohki, Kuwana, JP;
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 3/205 (2006.01);
U.S. Cl.
CPC ...
Abstract
To provide a constant velocity universal joint having a high resistance to cracking, a high dimensional stability and an excellent rolling fatigue life, the constant velocity universal joint includes an outer coupling member (), an inner coupling member such as a tripod member (), and a drive transmitting member such as rollers () operatively interposed between the outer and inner coupling members (and). At least one of the outer coupling member (), the tripod member () and the rollers () has a carbonitrided layer and, at the same time, an austenite grain size is greater than the grade of No. 10.