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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 10968954 B1

PDFFull Text
Date of Patent:
Apr. 06, 2021

Filed:

Jul. 03, 2017

Grease, antifriction bearing, antifriction bearing device, and information recording/reproducing device

Applicant:

Seiko Instruments Inc., Chiba, JP;

Inventors:

Akihiro Iino, Chiba, JP;

Takayuki Kosaka, Chiba, JP;

Misato Hanaoka, Chiba, JP;

Hisaya Nakamura, Sodegaura, JP;

Koji Ishii, Sodegaura, JP;

Assignee:

SEIKO INSTRUMENTS INC.;

Attorney:

Adams & Wilks

Primary Examiner:

Pamela H Weiss

Int. Cl.
CPC ...
F16C 33/66 (2006.01); C10M 169/02 (2006.01); F16C 33/41 (2006.01); C10M 101/02 (2006.01); C10M 105/04 (2006.01); F16C 19/54 (2006.01); C10N 20/02 (2006.01); C10N 30/02 (2006.01); C10N 30/06 (2006.01); C10N 40/02 (2006.01); C10N 50/10 (2006.01); C10M 115/08 (2006.01); G11B 5/48 (2006.01);
U.S. Cl.
CPC ...
F16C 33/6633 (2013.01); C10M 101/02 (2013.01); C10M 105/04 (2013.01); C10M 115/08 (2013.01); C10M 169/02 (2013.01); F16C 19/546 (2013.01); F16C 33/416 (2013.01); F16C 33/418 (2013.01); F16C 33/6614 (2013.01); F16C 33/6688 (2013.01); G11B 5/4813 (2013.01); C10M 2203/024 (2013.01); C10M 2203/1006 (2013.01); C10M 2203/1025 (2013.01); C10M 2205/0285 (2013.01); C10M 2215/1026 (2013.01); C10N 2020/02 (2013.01); C10N 2030/02 (2013.01); C10N 2030/06 (2013.01); C10N 2040/02 (2013.01); C10N 2050/10 (2013.01); F16C 2210/04 (2013.01); F16C 2370/12 (2013.01);
Abstract

A bearing grease includes a base oil and a thickener, and the base oil includes mineral oil and poly-α-olefin. The poly-α-olefin may be a blend of poly-α-olefin having a kinetic viscosity higher than that of the mineral oil and poly-α-olefin having a kinetic viscosity equal to or lower than that of the mineral oil, and the kinetic viscosity of the base oil at 40° C. is in a range of 40 through 90 mm/s. The amount of the poly-α-olefin by mass in the base oil is greater than the amount of the mineral oil by mass in the base oil. The worked penetration of the grease is in a range of 200 through 250. The grease reduces flying grease and outgas and has superior low-temperature characteristics.

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