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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 10819180 B1

PDFFull Text
Date of Patent:
Oct. 27, 2020

Filed:

Jun. 14, 2017

Fluid dynamic bearing device and motor with same

Applicant:

Ntn Corporation, Osaka, JP;

Inventor:

Shinji Komatsubara, Mie, JP;

Assignee:

NTN CORPORATION, Osaka, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Tulsidas C Patel

Assistant Examiner:

Rashad H Johnson

Int. Cl.
CPC ...
H02K 5/16 (2006.01); H02K 5/167 (2006.01); F16C 35/02 (2006.01); H02K 7/08 (2006.01); F16C 17/02 (2006.01); F16C 33/14 (2006.01); F16C 33/10 (2006.01); F16C 33/12 (2006.01); F16C 17/10 (2006.01); F16C 33/74 (2006.01);
U.S. Cl.
CPC ...
H02K 5/167 (2013.01); F16C 17/02 (2013.01); F16C 17/026 (2013.01); F16C 33/103 (2013.01); F16C 33/104 (2013.01); F16C 33/106 (2013.01); F16C 33/107 (2013.01); F16C 33/128 (2013.01); F16C 33/145 (2013.01); F16C 35/02 (2013.01); H02K 7/08 (2013.01); F16C 17/107 (2013.01); F16C 33/745 (2013.01); F16C 2370/12 (2013.01);
Abstract

A charging amount of lubricating oil () into an internal space of a housing () is adjusted so that, within a range of a use temperature, an oil level of the lubricating oil () is positioned on a lower side with respect to an upper end portion of a chamfered portion () formed in an upper-end inner peripheral edge portion of a bearing member (). The bearing member () integrally includes: a small-diameter cylindrical portion (); and a large-diameter cylindrical portion (). Under a state in which an upper end surface () of the small-diameter cylindrical portion () is exposed to an atmosphere, the large-diameter cylindrical portion () is sandwiched from both sides in the axial direction with an annular member () and a bottom portion () of the housing () so that the bearing member () is fixed along an inner periphery of the housing ().

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