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:
May. 13, 2025
Filed:
Jul. 05, 2022
Hitachi Astemo, Ltd., Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
In a variable displacement oil pump (VP) according to the present invention, a stopper portion () that can come into contact with a cam ring contact portion () provided at a pump accommodating portion () is provided at a position that does not overlap a first suction port (), a second suction port () and an inlet (), which correspond to a suction portion, in a circumferential direction of rotation of a drive shaft () on a rotation center (Z). Therefore, there is no risk that flow of oil sucked into pump chambers () located in a suction region through the first suction port (), the second suction port () and the inlet () will be interrupted by the stopper portion (), thereby improving a suction performance of the pump.