公开(公告)号：US20180252215A1

公开(公告)日：2018-09-06

申请号：US15758091

申请日：2016-08-31

Applicant: KYB Corporation

Inventor： Hiromi SHIMONO ,  Tomoyuki FUJITA ,  Tomoyuki NAKAGAWA ,  Hirotoshi KONDOU

IPC: F04C15/06 ,  F04C2/344

CPC classification number: F04C15/06 ,  F04C2/344 ,  F04C15/00

Abstract: A vane pump includes a high-pressure chamber formed as a groove in a bottom portion of a pump-accommodating concave portion. The working fluid is discharged from a plurality of discharge ports leading to the high-pressure chamber. A high-pressure passage has an opening portion opening to the high-pressure chamber and guides the working fluid to the outside of the high-pressure chamber. In the vane pump, one of the plurality of discharge ports is arranged so as to face the opening portion of the high-pressure passage, and the flow-passage cross-sectional area of the high-pressure chamber is smaller than the total flow-passage cross-sectional area of the plurality of the discharge ports.