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:
Apr. 12, 2022
Filed:
Dec. 11, 2017
Ntn Corporation, Osaka, JP;
Hiroyoshi Ito, Mie, JP;
NTN Corporation, Osaka, JP;
Abstract
An abnormality detection device for a rolling bearing includes a filter that allows passage of lubricating oil, while preventing passage of metal pieces, from the bearing space between the outer ring and the inner ring of the rolling bearing to the exterior of the bearing space. The device further includes an electrical circuit including a pair of permanent magnets mounted, as a pair of electrodes, to the filter so as to be spaced apart from each other, and electrical lines extending from the respective electrodes to a power source. A state detector detects a change in electrical output from the electrical circuit when metal pieces adhere between the pair of permanent magnets, thereby detecting the state of the metal pieces contained in the lubricating oil.