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:
Oct. 01, 2019
Filed:
Dec. 13, 2017
Applicant:
Nsk Ltd., Tokyo, JP;
Inventors:
Assignee:
NSK LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/26 (2006.01); G01N 33/28 (2006.01); G01N 33/30 (2006.01); G01N 27/06 (2006.01); G01M 13/04 (2019.01); G01N 27/22 (2006.01);
U.S. Cl.
CPC ...
G01N 33/2888 (2013.01); G01M 13/04 (2013.01); G01N 27/221 (2013.01); G01N 27/06 (2013.01);
Abstract
A method is for diagnosing a rolling device comprising an outer member, an inner member, and a rolling element. The method includes applying an alternating voltage to an electric circuit configured by the outer member, the rolling element and the inner member, measuring an impedance and a phase of the electric circuit when the alternating voltage is applied to the electric circuit, and calculating a lubrication film thickness and a metallic contact ratio between the outer member and the rolling element and/or between the inner member and the rolling element, based on a measured impedance and a measured phase.