公开(公告)号：US20170291588A1

公开(公告)日：2017-10-12

申请号：US15511566

申请日：2016-03-31

Applicant: ADVICS CO., LTD.

Inventor： Nobuyuki HIROTA ,  Minoru WATANABE ,  Yu FURUTA ,  Yoji INOUE ,  Eri TANIMOTO

IPC: B60T13/57

CPC classification number: B60T13/57

Abstract: A valve mechanism of this negative pressure type booster device has: a negative pressure valve seat provided on a valve body; an atmospheric valve seat provided on a plunger; and a valve part provided with a negative pressure valve section constituting a negative pressure valve together with the negative pressure valve seat and an atmospheric valve section constituting an atmospheric valve together with the atmospheric valve seat. The valve mechanism is provided with a tilting part which is provided on at least one of the valve body and the valve part and tilts the atmospheric valve section relative to a first plane formed when the negative pressure valve section and the negative pressure valve seat are brought into contact with each other to put the negative pressure valve in a closed state.