公开(公告)号：US11067181B2

公开(公告)日：2021-07-20

申请号：US16556792

申请日：2019-08-30

Applicant: DENSO CORPORATION

Inventor： Kentaro Yutani ,  Takumi Kataoka ,  Naohito Seko

IPC: F16K5/20 ,  F16K5/06 ,  F16K37/00

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.

公开(公告)号：US11067180B2

公开(公告)日：2021-07-20

申请号：US16282332

申请日：2019-02-22

Applicant: DENSO CORPORATION

Inventor： Naohito Seko ,  Yoshiaki Yamamoto ,  Shinichi Yokoyama ,  Yuuji Nakano ,  Ryo Sano

IPC: F16K5/06 ,  F16K11/087 ,  F16K5/20 ,  F16K31/04

Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening ϕ2 is smaller than a diameter of the valve opening ϕ1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

公开(公告)号：US10443745B2

公开(公告)日：2019-10-15

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 ,  F16K37/00

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.

公开(公告)号：US11608903B2

公开(公告)日：2023-03-21

申请号：US17345082

申请日：2021-06-11

Applicant: DENSO CORPORATION

Inventor： Naohito Seko ,  Yoshiaki Yamamoto ,  Shinichi Yokoyama ,  Yuuji Nakano ,  Ryo Sano

IPC: F16K11/087 ,  F01P7/14 ,  F16K5/06 ,  F16K5/20 ,  F16K31/04

Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening Φ2 is smaller than a diameter of the valve opening Φ1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

公开(公告)号：US10808848B2

公开(公告)日：2020-10-20

申请号：US16051517

申请日：2018-08-01

Applicant: DENSO CORPORATION

Inventor： Naohito Seko ,  Yoshiaki Yamamoto ,  Shinichi Yokoyama ,  Yuuji Nakano ,  Ryo Sano

IPC: F16K5/06 ,  F16K5/20 ,  F16K11/087 ,  F16K31/04

Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening ϕ2 is smaller than a diameter of the valve opening ϕ1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

公开(公告)号：US12209672B2

公开(公告)日：2025-01-28

申请号：US17972810

申请日：2022-10-25

Applicant: DENSO CORPORATION

Inventor： Kousei Takagi ,  Tadashi Ikemoto ,  Naohito Seko

IPC: F16K11/085 ,  F01P5/10 ,  F01P7/14 ,  F01P7/16 ,  F16K5/06 ,  F16K5/20 ,  F16K11/087

Abstract: A valve, which is rotated about a rotational axis, includes a valve outer peripheral portion. The valve outer peripheral portion has a valve inflow port for supplying fluid to a flow passage of the valve outer peripheral portion and valve outflow ports for discharging the fluid from the flow passage. The valve outflow ports include: a main outflow port which is configured to communicate with a whole of a seat opening of a valve seat; and a plurality of intermediate outflow ports, each of which is configured to communicate with a portion of the seat opening. An axial dimension of each intermediate outflow port, which is measured in an axial direction of the rotational axis, is smaller than an axial dimension of the seat opening, which is measured in the axial direction. The axial dimension of each intermediate outflow port is progressively changed in a circumferential direction.

公开(公告)号：US11079028B2

公开(公告)日：2021-08-03

申请号：US16805982

申请日：2020-03-02

Applicant: DENSO CORPORATION

Inventor： Koji Hashimoto ,  Naohito Seko ,  Ryo Sano

IPC: F16K11/087 ,  F16K5/20 ,  F01P7/14 ,  F16K31/12 ,  F16K5/06

Abstract: A sleeve member of a movable unit has a first pressure receiving surface and a second pressure receiving surface. The first pressure receiving surface receives a first fluid pressure in an axial direction opposite to a biasing force of a spring, when a valve member closes a seat opening portion. The second pressure receiving surface receives a second fluid pressure in the same axial direction to a direction of the biasing force of the spring, when the valve member closes the seat opening portion. A first surface area and a second surface area are made to be equal to each other. Each of the first and the second surface areas is an area of a projected portion on a virtual plane perpendicular to the axial direction. Each of the projected portions is obtained when each of the first and the second pressure receiving surfaces is projected to the virtual plane.

公开(公告)号：US10066751B2

公开(公告)日：2018-09-04

申请号：US15121201

申请日：2015-06-23

Applicant: DENSO CORPORATION

Inventor： Naohito Seko ,  Yoshiaki Yamamoto ,  Shinichi Yokoyama ,  Yuuji Nakano ,  Ryo Sano

IPC: F16K31/04 ,  F16K11/087 ,  F16K5/06 ,  F16K5/20

Abstract: A valve device includes: a ball valve having a ball face shaped in a convex spherical surface; and a valve seat having a seat face shaped in a concave spherical surface. The seat face is pressed onto the ball face. The ball valve is rotated to open a valve by communicating a valve opening defined in the ball valve and a seat opening defined in the valve seat with each other, and to close the valve by stop the communication. A diameter of the seat opening Φ2 is smaller than a diameter of the valve opening Φ1. A curvature radius of the ball face R1 is smaller than or equal to a curvature radius of the seat face is R2.

公开(公告)号：US20200056706A1

公开(公告)日：2020-02-20

申请号：US16556792

申请日：2019-08-30

Applicant: DENSO CORPORATION

Inventor： KENTARO YUTANI ,  Takumi Kataoka ,  Naohito Seko

IPC: F16K5/20 ,  F16K5/06 ,  F16K37/00

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.