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:
Jan. 22, 2019
Filed:
Mar. 27, 2015
Tdk Corporation, Tokyo, JP;
Nobuyuki Shimbo, Tokyo, JP;
Masashi Gotoh, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
This arcuate magnet piece includes: coupling side surfaces which are coupled with other adjacently joined arcuate magnet pieces; a curved inner peripheral surface; and a curved outer peripheral surface which faces the inner peripheral surface. The coupling side surfaces include tip surfaces which intersect, at prescribed angles, tangents to the direction of curvature of the outer peripheral surface. The coupling side surfaces are polarized such that, in cases when the gaps formed with the coupling side surfaces of the other arcuate magnet pieces are disposed so as to be substantially parallel, the magnetic poles of the other joined arcuate magnet pieces are different.