公开(公告)号：US11339884B2

公开(公告)日：2022-05-24

申请号：US16637608

申请日：2018-12-03

Applicant: KYB Corporation

Inventor： Takeshi Terao ,  Atsushi Fujii ,  Nobuyoshi Yoshida

IPC: F16K17/02 ,  F15B13/02 ,  F15B13/04

Abstract: A valve device includes a relief valve configured to be opened when a pressure in a fluid pressure circuit reaches a predetermined pressure and to relieve a working fluid, a tank passage connected to a tank, a main relief passage connecting the relief valve and the tank passage, and a sub relief passage branching from the main relief passage and connected to the tank passage separately from the main relief passage.