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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.:

US 11851627 B1

PDFFull Text
Date of Patent:
Dec. 26, 2023

Filed:

Apr. 20, 2020

Grease composition for tapered roller bearing and tapered roller bearing

Applicant:

Ntn Corporation, Osaka, JP;

Inventors:

Ryouta Kondou, Mie, JP;

Takayuki Kawamura, Mie, JP;

Assignee:

NTN CORPORATION, Osaka, JP;

Attorneys:

Hedman & Costigan, P.C.

James V. Costigan

Kathleen A. Costigan

Primary Examiner:

Prem C Singh

Assistant Examiner:

Francis C Campanell

Int. Cl.
CPC ...
C10M 135/10 (2006.01); C10M 117/02 (2006.01); C10M 117/06 (2006.01); C10M 137/10 (2006.01); C10M 169/06 (2006.01); F16C 19/36 (2006.01); F16C 19/38 (2006.01); F16C 33/61 (2006.01); C10N 10/02 (2006.01); C10N 10/04 (2006.01); C10N 20/02 (2006.01); C10N 30/06 (2006.01); C10N 30/08 (2006.01); C10N 40/02 (2006.01); C10N 50/10 (2006.01);
U.S. Cl.
CPC ...
C10M 135/10 (2013.01); C10M 117/02 (2013.01); C10M 117/06 (2013.01); C10M 137/10 (2013.01); C10M 169/06 (2013.01); F16C 19/36 (2013.01); F16C 19/38 (2013.01); F16C 33/61 (2013.01); C10M 2203/1006 (2013.01); C10M 2207/1236 (2013.01); C10M 2207/1265 (2013.01); C10M 2207/2805 (2013.01); C10M 2219/046 (2013.01); C10M 2223/045 (2013.01); C10N 2010/02 (2013.01); C10N 2010/04 (2013.01); C10N 2020/02 (2013.01); C10N 2030/06 (2013.01); C10N 2030/08 (2013.01); C10N 2040/02 (2013.01); C10N 2050/10 (2013.01);
Abstract

To provide a grease composition for a tapered roller bearing having superior bearing lifetime under a condition of high temperature and a condition of high load, and a tapered roller bearing in which the grease composition for the tapered roller bearing is filled. A tapered roller bearingincludes an inner ringhaving a raceway surface, an outer ringhaving a raceway surfaceand a plurality of tapered rollers, and a flange part of the inner ringgets into sliding contact with the tapered rollers. Greaseis filled around the tapered rollers. The greaseincludes a base oil, a thickener and an additive. A frequency in which a storage modulus, which varies depending on frequency, of the greasebecomes minimum is equal to 7 Hz or more.

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