公开(公告)号：US20210207722A1

公开(公告)日：2021-07-08

申请号：US17212406

申请日：2021-03-25

Applicant: FUJIKIN INCORPORATED

Inventor： Nobuo NAKAMURA ,  Kenta KONDO ,  Tomohiro NAKATA ,  Masahiko NAKAZAWA

IPC: F16K7/16 ,  F16K27/02

Abstract: A valve device includes: a valve device body including a valve seat; a diaphragm that is provided to cover a valve chamber; a stem; and a valve body portion that is inserted into a central portion of the diaphragm, and that is configured to open and close the fluid passage by approaching the valve seat and separating from the valve seat. The diaphragm includes a main diaphragm, and a support diaphragm positioned on an opposite side of the main diaphragm to the valve chamber side and provided in contact with the main diaphragm. A first terminal end portion on an inner peripheral side of the main diaphragm is fixed to the valve body portion. A second terminal end portion on an inner peripheral side of the support diaphragm is separated from the first terminal end portion on the inner peripheral side of the main diaphragm.

公开(公告)号：US20250060049A1

公开(公告)日：2025-02-20

申请号：US18718595

申请日：2023-02-06

Applicant: FUJIKIN INCORPORATED

Inventor： Nobuo NAKAMURA ,  Tatsuhiko SATO ,  Tomohiro NAKATA ,  Kengo TSUJINO

IPC: F16K31/122 ,  F16K31/42 ,  H01L21/67

Abstract: [Problem] To provide a valve device in which valve opening time and valve closing time are adjustable to be close to each other.
[Solution] The valve device comprises: a valve body defining a flow path; a diaphragm 4 as a valve element for opening and closing the flow path; a stem 7 for making the diaphragm 4 separate and seat on a valve seat 3; a coil spring 15 as a spring member for constantly biasing the stem 7 in a valve-closing direction; a piston 30,36 connected to the stem 7; and an actuator body 20 for slidably accommodating the piston 30,36, wherein the inside of the actuator body 20 is partitioned by the piston 30,36 into a pressure chamber 31,37 to which a driving gas DG is supplied and an atmospheric chamber 32,38 communicating with the atmosphere via vent holes 21a, 21b formed in the actuator body 20, and the actuator body 20 includes an adjustment mechanism 50 capable of restricting the ventilation amounts of the vent holes 21a, 21b so as to adjust a valve closing time required for valve closing and a valve opening time required for valve opening to be equal to each other.

公开(公告)号：US20250129863A1

公开(公告)日：2025-04-24

申请号：US18718204

申请日：2023-02-21

Applicant: FUJIKIN INCORPORATED

Inventor： Tatsuhiko SATO ,  Nobuo NAKAMURA ,  Tomohiro NAKATA ,  Kengo TSUJINO

IPC: F16K31/122

Abstract: [Problem] To provide a valve device which can realize high flow rate control and high-speed response, and which is easy to manufacture. [Solution] A valve device comprising a valve body 2, a valve element 41 and a multi-stage cylinder actuator 60 for moving the valve element, wherein the multi-stage cylinder actuator 60 includes a casing 6 divided into an upper cylinder chamber 64 and a lower cylinder chamber 66, an upper piston 81 slidably arranged in an upper cylinder chamber 64, and a lower piston 83 having an operation shaft 83d for operating the valve element 41 and an abutment shaft 83a for contacting the upper piston 81, the upper piston 81 has an upper operation air passage 81b for supplying operation air, the lower piston 83 has a lower operation air passage 83b in communication with the upper operation air passage 81b at a contact portion with the upper piston 81, and an O-ring 92 is provided at the contact portion to prevent leakage of the operation air. [Selection diagram] FIG. 1

公开(公告)号：US20220213965A1

公开(公告)日：2022-07-07

申请号：US17704564

申请日：2022-03-25

Applicant: FUJIKIN INCORPORATED

Inventor： Nobuo NAKAMURA ,  Kenta KONDO ,  Tomohiro NAKATA ,  Tsutomu SHINOHARA

IPC: F16K7/17 ,  F16K7/16

Abstract: A valve device includes: a body formed with a valve chamber, a first inflow passage, a second inflow passage, an outflow passage, and an annular groove and provided with a valve seat; and a diaphragm configured to communicate with and interrupt the second inflow passage and the outflow passage. An end portion of the second inflow passage is open to the valve chamber. The valve seat is provided on a peripheral edge of a location where the valve chamber and the second inflow passage communicate with each other. The annular groove is open to the valve chamber and is formed around the second inflow passage. An end portion of the outflow passage is open to the annular groove. The first inflow passage has a plurality of flow passages including an inflow port and a plurality of outflow ports, and each outflow port is open to the annular groove.

公开(公告)号：US20210262576A1

公开(公告)日：2021-08-26

申请号：US16972717

申请日：2019-05-17

Applicant: FUJIKIN INCORPORATED

Inventor： Yuya SUZUKI ,  Ryutaro TANNO ,  Daihi TSUCHIGUCHI ,  Nobuo NAKAMURA ,  Tsutomu SHINOHARA

IPC: F16K7/12 ,  F16K37/00 ,  F16K25/00

Abstract: A diaphragm valve capable of preventing fluid in a diaphragm valve from leaking to the outside due to breakage of a diaphragm includes a valve body that defines a flow path through which fluid flows and an opening that opens to the outside in a middle of flow path; a flexible partition member that covers the opening and separates the flow path from the outside, and changes a cross-sectional area of the flow path; a flexible support member disposed on a rear surface side opposite to a flow path side of the flexible partition member; a housing that is fixed to the valve body via peripheral portions of the flexible partition member and the flexible support member; and a humidity sensor that detects a state of an atmosphere or a change thereof in a space defined by the flexible support member and an inner surface of the housing.

公开(公告)号：US20210199210A1

公开(公告)日：2021-07-01

申请号：US17162489

申请日：2021-01-29

Applicant: FUJIKIN INCORPORATED

Inventor： Takashi HIROSE ,  Masahiko NAKAZAWA ,  Nobuo NAKAMURA ,  Tomoko YUHARA

IPC: F16K31/00

Abstract: A first lever portion includes a first point-of-effort portion, a first fulcrum portion, and a first point-of-load portion. A second lever portion has a second point-of-effort portion, a second fulcrum portion, and a second point-of-load portion. A first point-of-effort portion is located between a first fulcrum portion and a first point-of-load portion in a direction orthogonal to an axis of a stem. A second fulcrum portion is located between a second point-of-effort portion and a second point-of-load portion in the direction orthogonal to the axis. A distance between the second fulcrum portion and the second point-of-load portion is configured longer than a distance between the second fulcrum portion and the second point-of-effort portion. The second point-of-load portion of the second lever portion is displaced toward the stem and moves the stem toward the piezoelectric element by means of displacement of the intermediate member to the second lever portion side.

公开(公告)号：US20240418290A1

公开(公告)日：2024-12-19

申请号：US18815030

申请日：2024-08-26

Applicant: FUJIKIN INCORPORATED

Inventor： Nobuo NAKAMURA ,  Kazunari WATANABE ,  Tomohiro NAKATA ,  Tsutomu SHINOHARA

IPC: F16K31/122

Abstract: An actuator includes: a casing including a first pressing portion; a drive member including a second pressing portion, the drive member being driven by an operating fluid flowing from outside; and a sealing member disposed to be sandwiched between the casing and the drive member in a direction perpendicular to a moving direction of the drive member, the sealing member sealing a pressure chamber. The first pressing portion and the second pressing portion face each other in the moving direction of the drive member. The sealing member is positioned between the first pressing portion and the second pressing portion. The second pressing portion moves toward and away from the first pressing portion as the drive member moves, and when the second pressing portion is positioned close to the first pressing portion, the sealing member is configured to be sandwiched between the first pressing portion and the second pressing portion.

公开(公告)号：US20210239222A1

公开(公告)日：2021-08-05

申请号：US17213882

申请日：2021-03-26

Applicant: FUJIKIN INCORPORATED

Inventor： Hidenobu SATO ,  Kenta KONDO ,  Tomohiro NAKATA ,  Masahiko NAKAZAWA ,  Nobuo NAKAMURA ,  Tomoko YUHARA

IPC: F16K7/16 ,  F16K1/04 ,  F16K43/00

Abstract: A valve body unit is configured to be disengaged from a stem by moving the stem and the valve body unit to a valve seat side in a state where a bonnet is separated from the valve seat, thereby pushing a replacement ring such that the replacement ring moves through the bonnet while decreasing in diameter and then drops down onto a ring dropping portion in the free state, then moving the stem, the valve body unit, and the replacement ring to an opposite side to the valve seat side such that a first surface comes into contact with a second surface and the ring dropping portion comes into contact with the replacement ring, and in this state, moving only the stem to the opposite side to the valve seat side such that the connection formed by a connecting mechanism between the stem connection portion and the stem is released.

公开(公告)号：US20200248833A1

公开(公告)日：2020-08-06

申请号：US16832448

申请日：2020-03-27

Applicant: FUJIKIN INCORPORATED

Inventor： Masahiko NAKAZAWA ,  Nobuo NAKAMURA ,  Tomohiro NAKATA ,  Tsutomu SHINOHARA

IPC: F16K31/44

Abstract: An actuator includes: a casing; a reciprocating member provided in the casing to be reciprocatable; a drive part provided in the casing to drive the reciprocating member; a booster mechanism which is configured to amplify a drive force applied by the drive part to the reciprocating member; and a moving member which is configured to move on receiving the force amplified by the booster mechanism. The booster mechanism includes a plurality of levers which are arranged in a circumferential direction of the moving member. Each of the levers has an effort portion which is configured to receive the force from the reciprocating member, a fulcrum portion which is configured to come into contact with the casing to serve as a center of a revolution of the lever, and a load portion which is configured to transmit the force to the moving member.