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:
Feb. 06, 2024
Filed:
Mar. 07, 2022
Nidec Corporation, Kyoto, JP;
NIDEC CORPORATION, Kyoto, JP;
Abstract
A housing of a drive device includes a refrigerant flow path through which a refrigerant flows. The refrigerant flow path includes a first flow path, a second flow path, a third flow path, and a fourth flow path. The refrigerant to be sent from a pump flows through the first flow path. The refrigerant to be supplied to the motor portion flows in the second flow path. The third flow path supplies a part of the refrigerant flowing through the second flow path to the outer surface of a stator. The fourth flow path supplies the other part of the refrigerant flowing through the second flow path to a hollow portion of a shaft. A minimum flow-path cross-sectional area in the fourth flow path is smaller than a minimum flow-path cross-sectional area in the third flow path.