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. 13, 2024
Filed:
Feb. 21, 2020
Mitsubishi Electric Corporation, Tokyo, JP;
Naoki Hayami, Tokyo, JP;
Tetsuya Sakurada, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
An electric motor includes a shaft supported rotatably around a rotation axis, a rotor located radially outward from the shaft and rotatable integrally with the shaft, and a stator radially opposing the rotor. At least one of the rotor or the stator includes a ventilation path that is a through hole. The ventilation path has a branched shape. A total length of inner circumferential surface lengths of branched ventilation paths in a cross section perpendicular to a penetration direction of the ventilation path is longer than an inner circumferential surface length of an unbranched ventilation path in the cross section perpendicular to the penetration direction.