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:
Oct. 06, 2026
Filed:
Feb. 09, 2022
Hitachi Astemo, Ltd., Hitachinaka, JP;
Takaki Itaya, Hitachinaka, JP;
Noriyuki Maekawa, Hitachinaka, JP;
Shigehisa Aoyagi, Hitachinaka, JP;
Hideaki Goto, Hitachinaka, JP;
Shogo Miyamoto, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
An object of the present invention is to provide an electric motor system capable of suppressing deterioration in cooling performance due to mixing of bubbles (air) into a refrigerant. An electric motor systemof the present invention includes: a gear; a first surfacethat receives oil scraped off as the gearrotates; a second surfacethat is located downward in a vertical direction with respect to the first surface, faces the first surfaceat a position overlapping the first surfacein the vertical direction, receives the oil dropped from the first surface, and receives the oil scraped up as the gearrotates; and a recesslocated downward in the vertical direction with respect to the second surfaceand into which the oil received by the second surfaceflows. Both ends of the second surfacein a horizontal direction perpendicular to the vertical direction and perpendicular to an axial center of the gearare located inside both ends of the recessin the horizontal direction.