公开(公告)号：US11199268B2

公开(公告)日：2021-12-14

申请号：US17099336

申请日：2020-11-16

Applicant: CKD CORPORATION

Inventor： Kyomi Yamada ,  Tatsushi Nabei

IPC: F16K1/42 ,  F16K7/16 ,  F16K31/06 ,  F16K1/36 ,  F16K1/54 ,  G05D7/06 ,  F16K31/126 ,  F16K31/12 ,  F16K41/10 ,  F16K17/30 ,  F16K27/02 ,  F16K17/02 ,  F16K1/46 ,  F16K25/02

Abstract: A regulator performing fluid control includes an annular protruding portion having a valve seat on its leading end and an annular diameter-decreasing surface formed by decreasing an inner diameter of the annular protruding portion toward a valve hole. The regulator includes a valve element provided with a contact surface to be in contact with the valve seat and a columnar step portion provided on an inner peripheral side of the valve seat protruding from the contact surface toward the valve hole, the step portion having a diameter larger than an inner diameter of the valve hole and being coaxially formed with the valve hole. An annular ridge is formed by an outer peripheral surface of the step portion intersecting an end face of the step portion on the valve-hole side with the annular diameter-decreasing surface to constitute a passage narrowing portion.

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：US11118690B2

公开(公告)日：2021-09-14

申请号：US16309051

申请日：2017-06-19

Applicant: CKD CORPORATION

Inventor： Tatsushi Nabei ,  Michio Miyashita ,  Shinji Ishikawa ,  Fumihito Tsuchiya

IPC: F16K1/36 ,  F16K31/122 ,  F16K41/12

Abstract: A fluid control valve and manufacturing method thereof, wherein, when a pressing force acts on the engagement surface between a diaphragm member and a valve seat-contacting member, the valve seat-contacting member is not displaced and no gap is formed. The diaphragm member made of a first fluorine-based resin material is provided with a diaphragm membrane and a rod-shaped part in the center of the diaphragm membrane. The valve seat-contacting member made of an injection-moldable second fluorine-based resin material is provided with a ring-shaped sealing surface and a recess on the opposite side from the ring-shaped sealing surface. The rod-shaped part is partly fitted into the recess. A ring-shaped recessed is formed on outer circumference of a portion of the rod-shaped part. A small diameter recess is formed on the inner circumference of the recess. The ring-shaped recess section and the small diameter recess adhere closely to form the engagement surface.