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:
Feb. 03, 2009
Filed:
Aug. 16, 2006
Kazutoshi Toda, Tondabayashi, JP;
Kouji Kawaguchi, Izumi, JP;
Hiroyuki Ohshima, Kashihara, JP;
Naoki Masuda, Nara, JP;
Hiroki Matsuyama, Nara, JP;
Kazutoshi Toda, Tondabayashi, JP;
Kouji Kawaguchi, Izumi, JP;
Hiroyuki Ohshima, Kashihara, JP;
Naoki Masuda, Nara, JP;
Hiroki Matsuyama, Nara, JP;
JTEKT Corporation, Osaka-shi, Osaka, JP;
Abstract
A tapered roller bearing according to the invention is such that the surface hardnesses of a raceway surface of an inner ring and rolling contact surfaces of tapered rollers are set to 63 to 69HRC. In addition, respective raceway surfaces of an outer ring and the inner ring and the rolling contact surfaces of the tapered rollers are crowned and are set such that a total crowning amount is 50 μm or larger, an outer crowning rate is 40% or larger and a roller crowning rate is 20% or smalled.