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:
Nov. 10, 2020
Filed:
Sep. 29, 2017
Nidec Corporation, Kyoto, JP;
Takayuki Migita, Kyoto, JP;
Takeshi Honda, Kyoto, JP;
Hirofumi Muto, Kyoto, JP;
Osamu Fujimoto, Kyoto, JP;
Hiroshi Kitagaki, Kyoto, JP;
Yasuaki Nakahara, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A rotor core includes laminate steel plates extending in a radial direction with respect to a central axis. The laminate steel plates each include a base portion on a radially outer side of the central axis, and pieces separately disposed on a radially outer side of the base portion with penetrating portions therebetween, and arranged side by side at predetermined intervals in a circumferential direction. The laminate steel plates are laminated in an axial direction. The laminated steel plate at an upper end in the axial direction includes at least one of an outward projection extending radially outward from an outer edge portion of the base portion and an inward projection extending radially inward from an inner edge portion of the piece, and the laminated steel plate at a lower end in the axial direction includes an intervening portion between the base portion and the piece portion.