Patents Assigned to Fujikin Incorporated
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Patent number: 11493162Abstract: A joint includes a first block, a second block, and a single pipe section connecting the first block and the second block. The first block, the second block, and the single pipe have a first gas passage and a second gas passage inside therein. The first gas passage is formed so that a first port which opens at an outer surface of the first block, the single pipe section, and a second port which opens at an outer surface of the second block communicate with each other. The second gas passage is formed so that a third port and a fourth port which open at the outer surface of the second block communicate with each other. The second port is disposed between the third port and the fourth port.Type: GrantFiled: September 4, 2019Date of Patent: November 8, 2022Assignee: FUJIKIN INCORPORATEDInventors: Yusuke Shibata, Kazuhiro Fujine, Hidehiro Doya
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Patent number: 11495045Abstract: An image acquiring apparatus includes: a light irradiation unit configured to be capable of radiating light modulated with a modulation signal in a predetermined frequency band; photosensors configured to be capable of receiving the light radiated from the light irradiation unit, the light including reflected light reflected by an object, and the photosensors being arranged in a matrix; and a generation unit configured to generate a DC component from an electrical signal output from the photosensor due to the light received by the photosensor on the basis of the predetermined frequency band or the modulation signal.Type: GrantFiled: June 29, 2020Date of Patent: November 8, 2022Assignees: CONNECTEC JAPAN CORPORATION, FUJIKIN INCORPORATEDInventors: Hiroshi Komatsu, Akane Suzuki, Jun Kimura, Kensuke Kojima
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Patent number: 11472009Abstract: To provide a manual tool excellent in workability and operability and capable of precise tightening torque management, a manual tool includes a grip including a bit holding part that detachably holds a bit, and a torque sensor that is of a magnetostrictive type, and includes a detecting part that is penetrated by the bit held by the bit holding part and surrounds an outer periphery of the bit, the torque sensor is capable of contactlessly detecting a torque acting on the bit, and is detachably provided to the grip. The torque sensor can be configured to be formed so as to be mountable to the grip with the bit mounted to the bit holding part of the grip.Type: GrantFiled: October 23, 2018Date of Patent: October 18, 2022Assignees: FUJIKIN INCORPORATED, SASADA MAGNETICS AND SENSORS LABORATORY CO., LTD.Inventors: Akihiro Harada, Masahiko Ochiishi, Tsutomu Shinohara, Ichiro Sasada
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Patent number: 11460396Abstract: A concentration measurement method is performed using a concentration measurement device comprising: a measurement cell for flowing a fluid to be measured; a light source for generating light incident on the measurement cell; a photodetector for detecting light emitted from the measurement cell; an arithmetic unit for calculating the absorbance and concentration of the fluid to be measured based on an output of the photodetector; and a temperature sensor for measuring the temperature of the fluid to be measured.Type: GrantFiled: September 18, 2019Date of Patent: October 4, 2022Assignee: FUJIKIN INCORPORATEDInventors: Masaaki Nagase, Hidekazu Ishii, Kouji Nishino, Nobukazu Ikeda
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Patent number: 11460869Abstract: A fluid control system (1) comprises: a first valve (21) provided downstream of a flow rate controller (10), a flow rate measuring device (30) provided downstream of the first valve (21) and having a second valve (22), an open/close detector (26) provided to the second valve (22), and a controller (25) for controlling an open/close operation of the first valve (21) and the second valve (22), and the controller (25) controls the open/close operation of the first valve (21) in response to a signal output from the open/close detector (26).Type: GrantFiled: July 24, 2018Date of Patent: October 4, 2022Assignee: FUJIKIN INCORPORATEDInventors: Satoru Yamashita, Yohei Sawada, Masaaki Nagase, Kouji Nishino, Nobukazu Ikeda
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Publication number: 20220299432Abstract: A concentration measuring device 100 comprises: a measurement cell 4 having a flow path, a light source 1, a photodetector 7 for detecting light emitted from the measurement cell, and an arithmetic circuit 8 for calculating light absorbance and concentration of a fluid to be measured on the basis of an output of the photodetector, the measurement cell includes a cell body, a window portion 3 fixed to the cell body so as to contact the flow path, and a reflective member 5 for reflecting light incident on the measurement cell through the window portion, the window portion is fixed to the cell body 40 by a window holding member 30 via a gasket 15, an annular sealing protrusion 15a is provided on a first surface of the gasket for supporting the window portion, and an annular sealing protrusion 42a is also provided on a support surface 42 of the cell body for supporting the second surface opposite to the first surface of the gasket.Type: ApplicationFiled: June 10, 2022Publication date: September 22, 2022Applicant: FUJIKIN INCORPORATEDInventors: Masaaki NAGASE, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
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Publication number: 20220283081Abstract: The concentration measurement device 100 includes an electric unit 20 having a light source 22 and a photodetector 24, a fluid unit 10 having a measurement cell 1, a first light-transmission member 11 for transmitting light from the light source to the measurement cell, a second light transmission member 12 for transmitting light from the measurement cell to the photodetector, a lens 3A provided in the fluid unit, the lens 3A being arranged such that light from the first light transmission member is to be incident on the first position and light is to be emitted from the second position to the second light transmission member, a pressure sensor 5 for measuring pressure of fluid flowing through the measurement cell, and an arithmetic circuit 28 for detecting concentration of the fluid flowing through the measurement cell, the arithmetic circuit being configured to calculate the fluid concentration based on the output of the photodetector and a correction factor related to the pressure output by the pressure seType: ApplicationFiled: August 31, 2020Publication date: September 8, 2022Applicant: FUJIKIN INCORPORATEDInventors: Masaaki NAGASE, Masahiko TAKIMOTO, Kazuteru TANAKA, Kouji NISHINO, Nobukazu IKEDA
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Publication number: 20220275871Abstract: To provide a control valve with excellent durability performance without being restricted in terms of applications, such as usages under high pressures or high temperatures, as well as reduced generation of particles. A valve body forming an inflow passage and an outflow passage of a fluid; a valve seat formed at a peripheral edge of the inflow passage in the valve body; a diaphragm configured to connect and shut off the inflow passage and the outflow passage by coming into and out of contact with the valve seat; a diaphragm holder configured to press a central portion of the diaphragm; and an actuator configured to move the diaphragm holder are provided, includes a regulation mechanism configured to adjust a closing pressure generated between the valve seat and the diaphragm to a predetermined pressure.Type: ApplicationFiled: June 8, 2020Publication date: September 1, 2022Applicant: FUJIKIN INCORPORATEDInventors: Keisuke Ishibashi, Toshihide Yoshida, Tadayuki Yakushijin, Michio Yamaji, Tsutomu Shinohara
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Patent number: 11427911Abstract: A valve device with a built-in orifice is manufacturable with low-cost. The valve body defines an accommodation recess which opens at the surface of the valve body and contains a valve element therein, a primary flow path and a secondary flow path connected to the accommodation recess, the valve element having a sealing portion for blocking direct communication between the primary flow path and the secondary flow path through the accommodation recess, and a through flow passage for making the primary flow path and the secondary flow path communicate through the valve element, wherein an orifice is formed in the through flow passage.Type: GrantFiled: November 12, 2018Date of Patent: August 30, 2022Assignee: FUJIKIN INCORPORATEDInventors: Kazunari Watanabe, Kohei Shigyou, Kenji Aikawa, Tomohiro Nakata, Takahiro Matsuda, Tsutomu Shinohara
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Publication number: 20220268365Abstract: A diaphragm valve includes a body 3 having a flow path 2 formed therein, a sheet 4 formed in the flow path 2, a metal diaphragm 5 for opening and closing the flow path 2 by abutting on or separating from the sheet 4, a pair of clamping parts 6 and 7 for claiming peripheral edge portions of both side surfaces of the metal diaphragm 5 respectively to fix the metal diaphragm 5 to the body 3, and an actuator 8 for abutting the metal diaphragm 5 on the sheet 4 or separating the metal diaphragm from the sheet 4, wherein a fluorine resin coating is formed on a sheet side surface 5a of the metal diaphragm 5 in a region excluding a clamping region D-C between the sheet side surface 5a and the clamping part 7, and at least in a contact region B-A with the sheet 4 in a region C surrounded by the clamping region D-C.Type: ApplicationFiled: June 12, 2020Publication date: August 25, 2022Applicant: FUJIKIN INCORPORATEDInventors: Kaoru HIRATA, Masaaki NAGASE, Atsushi HIDAKA, Kazuyuki MORISAKI, Keisuke IDEGUCHI, Kosuke SUGIMOTO, Masafumi KITANO, Kouji NISHINO, Nobukazu IKEDA
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Patent number: 11421800Abstract: To provide a flow rate regulating valve capable of detecting a state where a flow path is fully closed even when there is no lead wire or the like for detecting the state where the flow path is fully closed. A flow rate regulating valve is a fluid regulating valve including a valve body for opening and closing fluid flow paths provided in a body and includes an actuator unit for moving the valve body, and the actuator unit includes a drive motor, a slider moved by a rotation of the motor, a cylindrical body mounted on the slider, and a shaft interlocked with the cylindrical body and provided with the valve body fixed to a distal end thereof. The motor is a stepping servomotor, and has a pressing control function for moving the valve body in the closing direction at a continuous rated torque.Type: GrantFiled: April 24, 2018Date of Patent: August 23, 2022Assignee: FUJIKIN INCORPORATEDInventors: Keigo Kobayashi, Masakazu Nagao, Tadayuki Yakushijin, Ryousuke Dohi
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Patent number: 11416011Abstract: A pressure-type flow rate control device includes a restriction part; a control valve provided upstream of the restriction part; an upstream pressure sensor for detecting pressure between the restriction part and the control valve; and an arithmetic processing circuit connected to the control valve and the upstream pressor sensor. The device is configured to perform flow rate control by controlling the control valve according to an output of the upstream pressure sensor. The arithmetic processing circuit performs an operation of closing the control valve in order to reduce a flow rate of a fluid flowing through the restriction part, and performs an operation of closing the control valve by feedback control in which a target value is an exponential function more gradual than the pressure drop characteristic data when a gas flows out of the restriction part.Type: GrantFiled: March 20, 2018Date of Patent: August 16, 2022Assignee: FUJIKIN INCORPORATEDInventors: Katsuyuki Sugita, Kaoru Hirata, Nobukazu Ikeda, Kouji Nishino, Masahiko Takimoto, Takahiro Imai, Shinya Ogawa
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Patent number: 11402250Abstract: The liquid level meter according to the present invention includes a resistive temperature detector, a temperature measuring body located above it, a temperature detecting unit detecting temperatures of the resistive temperature detector and the temperature measuring body, a current controlling unit determining a current value to be flowed through the resistive temperature detector so that the resistive temperature detector and the temperature measuring body become a predetermined temperature difference, a power supply unit supplying the current of the determined current value to the resistive temperature detector, and a liquid level detecting unit detecting a position of a liquid level.Type: GrantFiled: December 22, 2017Date of Patent: August 2, 2022Assignee: FUJIKIN INCORPORATEDInventors: Atsushi Hidaka, Takatoshi Nakatani, Satoru Yamashita, Katsuyuki Sugita, Kaoru Hirata, Masaaki Nagase, Kouji Nishino, Nobukazu Ikeda
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Patent number: 11402124Abstract: A fluid heater includes: a passage member having a passage formed therein; a heater for heating the passage member; a fixing member for fixing the passage member to a fluid control device; and a connection member connected to the passage member so as to allow fluid to flow into the passage member. The passage has a helical shape.Type: GrantFiled: September 26, 2019Date of Patent: August 2, 2022Assignee: FUJIKIN INCORPORATEDInventors: Tsuneyuki Okabe, Toshiyuki Inada, Taiji Chiba, Tatsuhiko Sato, Michio Yamaji, Tadayuki Yakushijin
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Patent number: 11402029Abstract: A valve device includes: a valve body that forms a first flow path and a second flow path; an inner disc that includes an inner annular part disposed around an opening of the first flow path, an outer annular part disposed on an outer peripheral side of the inner annular part, and a connecting part that includes a plurality of openings that communicates with the second flow path and that connects the inner annular part and the outer annular part; a valve seat disposed on the inner annular part; and a diaphragm that, at a peripheral edge part of the diaphragm, comes into contact with the outer annular part and makes the first flow path and the second flow path continuous and discontinuous by moving between an open position of non-contact and a closed position of contact with the valve seat.Type: GrantFiled: March 20, 2019Date of Patent: August 2, 2022Assignee: FUJIKIN INCORPORATEDInventors: Tatsuhiko Sato, Tsutomu Shinohara, Tomohiro Nakata, Takeru Miura
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Patent number: 11397443Abstract: A fluid control device includes a first block row and a second block row each including a plurality of joint blocks having a width of the standard size and arranged along a first directions, the first block row and the second block row being arranged at predetermined intervals in the second directions perpendicular to the first directions, wherein each of the plurality of joint blocks constituting the first block row has a large diameter flow path for forming a single line, and each of the plurality of joint blocks constituting the second block row has a smaller diameter flow path than the large diameter flow path for forming the first line and the second line.Type: GrantFiled: September 30, 2020Date of Patent: July 26, 2022Assignee: FUJIKIN INCORPORATEDInventors: Kenji Aikawa, Takahiro Matsuda, Toshiyuki Inada, Kazunari Watanabe, Yuta Motegi, Tomohiro Nakata, Tsutomu Shinohara
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Patent number: 11390951Abstract: In order to appropriately control temperatures of fluid heating sections that are maintained at different temperatures, the fluid control device (100) comprises a plurality of fluid heating sections (1) connected to each other and each having a flow path or a fluid accommodating portion inside, heaters (10) configured to heat each of the plurality of fluid heating sections to different temperatures, and heat insulating members (13, 13?) disposed between adjacent fluid heating sections.Type: GrantFiled: July 20, 2018Date of Patent: July 19, 2022Assignee: FUJIKIN INCORPORATEDInventors: Atsushi Hidaka, Takatoshi Nakatani, Keisuke Nakatsuji, Keiji Hirao, Yukio Minami, Nobukazu Ikeda
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Patent number: 11391608Abstract: A self-diagnosis method of a flow rate control device includes: a step (a) for measuring a pressure drop characteristic after a pressure control valve (6) has been changed to a closed state from a state where a fluid flows from the upstream side of the pressure control valve with the opening of a flow rate control valve (8) is larger than a restriction part; a step (b) for measuring the pressure drop characteristic after the pressure control valve has been changed to the closed state from a state where the fluid flows from the upstream side of the flow rate control valve to the downstream side with the opening of the flow rate control valve is smaller than the restriction part; a step (c) for determining whether there is an abnormality by comparing the pressure drop characteristic measured in step (a) with a corresponding reference pressure drop characteristic; a step (d) for determining whether there is an abnormality by comparing the pressure drop characteristic measured in step (b) with a corresponding refType: GrantFiled: November 20, 2018Date of Patent: July 19, 2022Assignee: FUJIKIN INCORPORATEDInventors: Katsuyuki Sugita, Ryousuke Dohi, Kaoru Hirata, Koji Kawada, Nobukazu Ikeda, Kouji Nishino
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Patent number: 11391668Abstract: A concentration measuring device 100 comprises: a measurement cell 4 having a flow path, a light source 1, a photodetector 7 for detecting light emitted from the measurement cell, and an arithmetic circuit 8 for calculating light absorbance and concentration of a fluid to be measured on the basis of an output of the photodetector, the measurement cell includes a cell body, a window portion 3 fixed to the cell body so as to contact the flow path, and a reflective member 5 for reflecting light incident on the measurement cell through the window portion, the window portion is fixed to the cell body 40 by a window holding member 30 via a gasket 15, an annular sealing protrusion 15a is provided on a first surface of the gasket for supporting the window portion, and an annular sealing protrusion 42a is also provided on a support surface 42 of the cell body for supporting the second surface opposite to the first surface of the gasket.Type: GrantFiled: September 17, 2019Date of Patent: July 19, 2022Assignee: FUJIKIN INCORPORATEDInventors: Masaaki Nagase, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
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Patent number: 11392148Abstract: A flow rate control system including a flow rate controller controlling a flow rate of a fluid supplied to a controlled object to keep a desired flow rate set value is provided, and includes a flow rate sensor, a pressure sensor measuring a pressure of a primary side of the flow rate controller, a PI calibration value determination unit determining a PI calibration value based on at least a physical property coefficient according to a physical property value of the fluid, a correction unit correcting an estimated flow rate, based on the PI calibration value and a measured value, and a drive control circuit adjusting an opening of a valve supplying the fluid to the controlled object based on the estimated value and controlling the flow rate of the fluid. A flow rate is accurately calculated regardless of types of a fluid in the pressure insensitive type flow rate controller.Type: GrantFiled: March 3, 2021Date of Patent: July 19, 2022Assignee: Fujikin IncorporatedInventors: Van Tu Nguyen, Masafumi Kitano