公开(公告)号：US20180031132A1

公开(公告)日：2018-02-01

申请号：US15551336

申请日：2016-03-24

Applicant: DENSO CORPORATION

Inventor： Kentaro YUTANI ,  Takumi KATAOKA ,  Naohito SEKO

IPC: F16K5/20 ,  F16K5/06

CPC classification number: F16K5/202 ,  F16K5/0605 ,  F16K5/0668 ,  F16K5/0678 ,  F16K5/0689 ,  F16K5/201 ,  F16K37/0041

Abstract: A valve device includes: a valve having a ball surface having a convex spherical shape, and a first opening opened in the ball surface to allow fluid to pass through; and a seat having an annular shape and opposing the ball surface to be in sliding contact, the seat being pressed against the ball surface, the seat having a second opening to communicate with the first opening. The seat has a sealing surface in a sliding contact with the ball surface at a valve closed time when the ball surface and the second opening overlap with each other, and a seat contact surface in a sliding contact with an opening inner wall surface or an opening end surface of the first opening at a valve opened time when the first opening and the second opening overlap with each other.