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:
Nov. 17, 2020
Filed:
Aug. 31, 2017
Applicant:
Ntn Corporation, Osaka, JP;
Inventors:
Jun Hirade, Mie, JP;
Masashi Yamagou, Mie, JP;
Mikihisa Fujiwara, Mie, JP;
Tetsuya Kurimura, Mie, JP;
Assignee:
NTN CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C 17/26 (2006.01); F16C 3/02 (2006.01); B23B 1/00 (2006.01); F16C 33/14 (2006.01); F16C 33/10 (2006.01);
U.S. Cl.
CPC ...
F16C 17/26 (2013.01); F16C 3/02 (2013.01); F16C 33/14 (2013.01); B23B 1/00 (2013.01); F16C 33/10 (2013.01); F16C 2220/62 (2013.01); F16C 2220/70 (2013.01); F16C 2370/12 (2013.01);
Abstract
A shaft member for a fluid bearing device includes, on an outer peripheral surface thereof, two bearing surfaces (and) separated from each other in an axial direction, and a middle relief portion () formed between the bearing surfaces (and) and having a diameter smaller than a diameter of the bearing surfaces. The middle relief portion () includes a cylindrical surface portion () having a ground surface, and stepped portions () arranged on both axial sides of the cylindrical surface portion and having a diameter difference from the cylindrical surface portion.