公开(公告)号：US20240384809A1

公开(公告)日：2024-11-21

申请号：US18658009

申请日：2024-05-08

Applicant: CKD CORPORATION

Inventor： Masaya Yamauchi ,  Tatsushi Nabei ,  Kazuhiro Fujita

IPC: F16K31/04 ,  F16K11/085

Abstract: A valve unit includes a rotary valve having a predetermined clearance between an inner surface of a main body and a valve element. The magnet coupling includes eight outer peripheral magnets and eight inner peripheral magnets having N-poles and S-poles each on an outer or inner peripheral side. The outer peripheral magnets are disposed such that the N-poles and the S-poles are disposed alternately in a circumferential direction and such that a distance between the central axis and an outer peripheral surface of the outer peripheral magnets is between 90% and 100% of a distance between the central axis and an outer surface of the main body closest to the central axis in a direction perpendicular to the central axis. The inner peripheral magnets are disposed opposite to the outer peripheral magnets such that the N-poles and the S-poles are disposed alternately in the circumferential direction.

公开(公告)号：US20230383854A1

公开(公告)日：2023-11-30

申请号：US18446479

申请日：2023-08-09

Applicant: CKD CORPORATION

Inventor： Akihiro Ito ,  Hiroki Doi ,  Masaya Yamauchi ,  Masayuki Kouketsu

IPC: F16K11/085 ,  G05D23/13 ,  F16K31/04 ,  F16K27/06

CPC classification number: F16K11/0856 ,  G05D23/1306 ,  F16K31/041 ,  F16K27/065

Abstract: A four-way valve includes a body and a valve component. The body includes a valve chamber and first to fourth communication channels which communicate with the valve chamber at positions arranged in sequence in a predefined rotational direction and cause the valve chamber to communicate with an outside. The valve component is rotatable in the predefined rotational direction and switches the four-way valve to be in at least one of: a first state in which the first and second communication channels communicate with the first region and the third and fourth communication channels communicate with the third region; and a second state in which the second communication channel communicates with the first region, the third communication channel communicates with the second region, and the first and fourth communication channels communicate with the third region.

公开(公告)号：US12188566B2

公开(公告)日：2025-01-07

申请号：US18446479

申请日：2023-08-09

Applicant: CKD CORPORATION

Inventor： Akihiro Ito ,  Hiroki Doi ,  Masaya Yamauchi ,  Masayuki Kouketsu

IPC: F16K11/08 ,  F16K11/085 ,  F16K27/06 ,  F16K31/04 ,  G05D23/13

Abstract: A four-way valve includes a body and a valve component. The body includes a valve chamber and first to fourth communication channels which communicate with the valve chamber at positions arranged in sequence in a predefined rotational direction and cause the valve chamber to communicate with an outside. The valve component is rotatable in the predefined rotational direction and switches the four-way valve to be in at least one of: a first state in which the first and second communication channels communicate with the first region and the third and fourth communication channels communicate with the third region; and a second state in which the second communication channel communicates with the first region, the third communication channel communicates with the second region, and the first and fourth communication channels communicate with the third region.

公开(公告)号：US11268628B2

公开(公告)日：2022-03-08

申请号：US16905632

申请日：2020-06-18

Applicant: CKD Corporation

Inventor： Akihiro Ito ,  Masayuki Kouketsu ,  Masaya Yamauchi ,  Toshikazu Tsuruga

IPC: F16K31/06 ,  F16K3/02 ,  F16K3/26 ,  F16K17/04 ,  F16K47/02

Abstract: A flow rate ratio control valve includes a pair of plate springs, each of which applies elastic force in a predetermined direction in accordance with the amount of deformation, a valve body supported by the pair of plate springs to be movable in the predetermined direction, a drive unit which drives the valve body in the predetermined direction in a non-contact state by means of electromagnetic force applied to a region between the pair of plate springs in the predetermined direction, a container in which the plate springs and the valve body are contained, and a damper which is attached to the valve body, defines a sectioned predetermined space in cooperation with an inner surface of the container, and forms a predetermined gap between the damper and the inner surface, the predetermined gap establishing communication in the predetermined direction between the predetermined space and the exterior of the predetermined space.