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. 10, 2015
Filed:
Apr. 12, 2012
Koji Yoshizaki, Osaka, JP;
Kunihiro Yamaguchi, Osaka, JP;
Komatsugu Nishimura, Osaka, JP;
Michiru Ueda, Osaka, JP;
Hiroki Iwamatsu, Kobe, JP;
Masashi Mitsuoka, Kobe, JP;
Koji Yoshizaki, Osaka, JP;
Kunihiro Yamaguchi, Osaka, JP;
Komatsugu Nishimura, Osaka, JP;
Michiru Ueda, Osaka, JP;
Hiroki Iwamatsu, Kobe, JP;
Masashi Mitsuoka, Kobe, JP;
JTEKT Corporation, Osaka-shi, JP;
Nippon Grease Co., Ltd., Osaka-shi, JP;
Abstract
There is provided a rolling bearing which inhibits spalling of a rolling element and has a long service life even under rigorous environments. The rolling bearing comprises grease for lubricating rolling contact parts and/or sliding contact parts between a first raceway surface and a rolling elements and/or between a second raceway surface and a rolling elements, wherein the grease comprises a base oil, a thickener and an extreme pressure additive, the thickener is a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound, an amount of cyclohexylamine in the total amount of the alkylphenylamine and cyclohexylamine is from 91 to 99% by mole, and a reaction temperature of the extreme pressure additive with iron is 260° C. or lower.