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:
Sep. 14, 2021
Filed:
Oct. 07, 2019
Nidec Copal Electronics Corporation, Tokyo, JP;
NIDEC COPAL ELECTRONICS CORPORATION, Tokyo, JP;
Abstract
A magnetic bearing includes a ring-shaped first magnet, a ring-shaped second magnet, a first magnetic body and a second magnetic body. The ring-shaped first magnet is magnetized in an axial direction. The ring-shaped second magnet is concentrically arranged with the first magnet and is magnetized in the axial direction. The first magnetic body is provided on a first surface in the axial direction of the second magnet. The second magnetic body is provided on a second surface parallel to the first surface in the axial direction of the second magnet. A thickness of each of the first magnetic body and the second magnetic body is less than or equal to an acceptable fluctuation amount in the axial direction of the second magnet with respect to the first magnet and greater than or equal to 0.1 mm.