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:
Dec. 18, 2012
Filed:
Mar. 16, 2009
Kenta Sakaguchi, Iwata, JP;
Kenta Sakaguchi, Iwata, JP;
NTN Corporation, Osaka, JP;
Abstract
A grease-sealed rolling bearing with a rotary outer race is provided of which the lubricating grease has a long life, and which produces less cold-time noise and can effectively prevent leakage of grease. In an outer-race-rotating type of rolling bearing A for use e.g. as a pulley bearing, lubricating grease G is sealed which contains a base oil having a dynamic viscosity at 40° C. of 13 to 73 cSt and which is thickened with a thickening agent of urea family so that the grease is present in an amount of not less than 20% of the entire spatial volume of the interior of the rolling bearing, and not more than 80% of the stationary spatial volume of the interior of the rolling bearing.