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:
May. 07, 2019
Filed:
Apr. 28, 2016
Applicants:
Kyodo Yushi Co., Ltd., Fujisawa-shi, Kanagawa, JP;
Nidec Corporation, Kyoto-shi, Kyoto, JP;
Inventors:
Iwaki Hirooka, Fujisawa, JP;
Takayuki Oe, Kyoto, JP;
Sayuri Tsubata, Kyoto, JP;
Yuji Hagiwara, Kyoto, JP;
Assignees:
KYODO YUSHI CO., LTD., Fujisawa, JP;
NIDEC CORPORATION, Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10N 30/10 (2006.01); C10N 40/02 (2006.01); C10M 129/70 (2006.01); C10M 169/04 (2006.01);
U.S. Cl.
CPC ...
C10M 169/04 (2013.01); C10M 129/70 (2013.01); C10M 2207/026 (2013.01); C10M 2207/2815 (2013.01); C10M 2215/064 (2013.01); C10M 2215/066 (2013.01); C10N 2030/10 (2013.01); C10N 2040/02 (2013.01); C10N 2230/02 (2013.01); C10N 2230/10 (2013.01); C10N 2230/60 (2013.01); C10N 2230/74 (2013.01); C10N 2240/02 (2013.01); C10N 2240/204 (2013.01);
Abstract
The invention provides a lubricating oil for fluid dynamic bearing including as a base oil a monoester oil free of unsaturated bond, and having an absolute viscosity of 2.0 to 3.0 mPa·s at 100° C. a viscosity index of 130 or more and a pour point of −20° C. or less.