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:
Dec. 31, 2019
Filed:
Nov. 25, 2016
Globeride, Inc., Tokyo, JP;
Takeshige Ohara, Tokyo, JP;
GLOBERIDE, Inc., Tokyo, JP;
Abstract
Provided is a magnetic fluid sealed bearing having a stable sealing performance in a gap. The magnetic fluid sealed bearing includes: an inner ring and an outer ring; a plurality of rolling elements disposed between the inner and outer rings; a ring-shaped polar plate mounted on an inner circumferential surface of the outer ring such that a gap is formed between the ring-shaped polar plate and an outer circumferential surface of the inner ring; a ring-shaped magnet attached to the ring-shaped polar plate and magnetized such that magnetic poles thereof point to axial directions, to form magnetic circuits on both an outer ring side and an inner ring side; an inner ring magnetic fluid retained in the magnetic circuit on the inner ring side; and a magnetic field intensity increasing portion for increasing magnetic field intensity of the magnetic circuit on the inner ring side.