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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 12534681 B1

PDFFull Text
Date of Patent:
Jan. 27, 2026

Filed:

Oct. 25, 2022

Rolling bearing, pivot assembly bearing, and disk drive apparatus

Applicant:

Minebea Mitsumi Inc., Nagano, JP;

Inventors:

Motojiro Tsuna, Nagano, JP;

Takanori Shingai, Nagano, JP;

Assignee:

MINEBEA MITSUMI Inc., Nagano, JP;

Attorney:

Chrisman Gallo Tochtrop LLC

Primary Examiner:

Vishal V Vasisth

Int. Cl.
CPC ...
C10M 169/00 (2006.01); C10M 105/36 (2006.01); C10M 115/08 (2006.01); C10M 133/40 (2006.01); C10M 135/26 (2006.01); C10M 137/04 (2006.01); C10M 141/10 (2006.01); F16C 33/66 (2006.01); C10N 20/00 (2006.01); C10N 20/02 (2006.01); C10N 30/08 (2006.01); C10N 30/10 (2006.01); C10N 40/02 (2006.01); C10N 50/10 (2006.01);
U.S. Cl.
CPC ...
C10M 169/00 (2013.01); C10M 105/36 (2013.01); C10M 115/08 (2013.01); C10M 133/40 (2013.01); C10M 135/26 (2013.01); C10M 137/04 (2013.01); C10M 141/10 (2013.01); F16C 33/6633 (2013.01); C10M 2207/2855 (2013.01); C10M 2215/1026 (2013.01); C10M 2215/30 (2013.01); C10M 2219/087 (2013.01); C10M 2223/041 (2013.01); C10N 2020/02 (2013.01); C10N 2020/071 (2020.05); C10N 2030/08 (2013.01); C10N 2030/10 (2013.01); C10N 2040/02 (2013.01); C10N 2050/10 (2013.01);
Abstract

The application provides a rolling bearing including a grease composition, the grease composition containing a base oil and a thickener, the base oil containing an aromatic ester-based base oil, and the thickener containing a urea-based thickener, where the grease composition has a storage elastic modulus at 25° C. of from 1200 to 3000 Pa as measured under conditions of a film thickness of 1 mm and a shear strain of 1% and has an oil separation amount at 80° C. of from 200 to 270 mm/mg; a pivot assembly bearing apparatus including the rolling bearing; and a disk drive apparatus including the pivot assembly bearing apparatus.

Find Patent Forward Citations

Tsuna, Motojiro. (2026). Rolling bearing, pivot assembly bearing, and disk drive apparatus (U.S. Patent No. 12534681). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12534681

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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