公开(公告)号：US20180118182A1

公开(公告)日：2018-05-03

申请号：US15567483

申请日：2016-05-27

Applicant: ADVICS CO., LTD.

Inventor： Yoji INOUE ,  Nan LI

IPC: B60T13/57 ,  F16J15/52 ,  F16K15/14

Abstract: A check valve of this negative pressure-type booster device is provided with: a cylindrical section that is integrally formed with a shell disposed on one side, communicates with a connection pipe, and is formed in a cylindrical shape protruding toward the inside of a housing; and a valve body section that is disposed inside the cylindrical section, and is axially fitted, within the cylindrical section, to the cylindrical section such that air is permitted to flow from a negative pressure chamber to the connection pipe while the air is prohibited from flowing from the connection pipe to the negative pressure chamber.