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:
Jun. 18, 2024
Filed:
Jan. 10, 2020
Applicant:
Nsk Ltd., Tokyo, JP;
Inventors:
Assignee:
NSK LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 13/04 (2019.01); F16C 19/06 (2006.01); F16C 19/52 (2006.01); F16C 19/54 (2006.01); F16C 33/66 (2006.01); G01N 27/22 (2006.01);
U.S. Cl.
CPC ...
G01M 13/04 (2013.01); F16C 19/06 (2013.01); F16C 19/522 (2013.01); F16C 19/546 (2013.01); F16C 33/66 (2013.01); G01N 27/221 (2013.01); F16C 2233/00 (2013.01); F16C 2237/00 (2013.01);
Abstract
A method for diagnosing a rolling device () including an outer member (), an inner member (), and rolling elements () includes: applying an AC voltage to an electric circuit including the outer member (), the rolling elements (), and the inner member (); measuring an impedance and a phase angle of the electric circuit when the AC voltage is applied; and measuring a dielectric constant of a lubricant at least one of between the outer member () and the rolling elements () and between the inner member () and the rolling elements () based on the measured impedance and the measured phase angle.