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:
Aug. 26, 2025
Filed:
Sep. 25, 2020
Mitsubishi Electric Corporation, Tokyo, JP;
Tetsuya Sakurada, Tokyo, JP;
Kazuki Iwasa, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An electric motor includes a shaft supported rotatably around a rotation axis, a rotor rotatable integrally with the shaft, a stator, and first and second retaining members to hold the rotor therebetween in an extending direction of the rotation axis. The rotor includes a stack of thin plates arranged in the extending direction of the rotation axis and including identically-shaped through holes. The through holes define air passages penetrating the rotor in the extending direction of the rotation axis. The first and second retaining members respectively include first and second through holes in communication with the air passages. The radially outermost portions of the walls of the first through holes are located radially inward from the radially outermost portions of the walls of the second through holes.