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:
Jun. 16, 2026
Filed:
Mar. 28, 2023
Applicant:
Ihi Corporation, Tokyo, JP;
Inventors:
Kai Iijima, Tokyo, JP;
Naoki Oiwa, Tokyo, JP;
Natsuki Yoneyama, Tokyo, JP;
Yuji Sasaki, Tokyo, JP;
Yoshihito Katsu, Tokyo, JP;
Hikaru Sugiura, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/28 (2006.01); H02K 1/27 (2022.01); H02K 7/00 (2006.01); H02K 15/03 (2006.01); H02K 15/12 (2006.01);
U.S. Cl.
CPC ...
H02K 1/28 (2013.01); H02K 7/003 (2013.01); H02K 15/03 (2013.01); H02K 15/12 (2013.01);
Abstract
A motor rotor includes a rotatable shaft, and a magnet structure mounted around the shaft. The magnet structure includes magnet pieces including a first magnet piece and a second magnet piece. The first magnet piece has a fracture surface facing the second magnet piece, and an outer surface forming a circumferential surface of the magnet structure. A surface roughness of the fracture surface is greater than a surface roughness of the outer surface of the first magnet piece.