Patents by Inventor Michio Yamaji
Michio Yamaji has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 12188578Abstract: To provide a valve that is easily assembled and has a low possibility of breakage of a coupled section even when the valve has to be downsized or subjected to a large load. A valve has a valve unit and a drive unit, is configured to include: a first recess that is a recess formed in either one of a second stem or a first stem and is formed with a groove at a predetermined position on an inner circumferential surface of the recess; a second recess formed in another one thereof; a stem pin accommodated in both of the recesses; an urging member that is accommodated in the first recess and urges the stem pin to the other side; a sidewall through-hole that penetrates a sidewall of the second recess horizontally; and a ball that enters the sidewall through-hole.Type: GrantFiled: August 26, 2021Date of Patent: January 7, 2025Assignee: FUJIKIN INCORPORATEDInventors: Souta Hachiman, Keisuke Ishibashi, Tadayuki Yakushijin, Yusei Horikawa, Michio Yamaji
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Publication number: 20240019045Abstract: To provide a valve that is easily assembled and has a low possibility of breakage of a coupled section even when the valve has to be downsized or subjected to a large load. A valve has a valve unit and a drive unit, is configured to include: a first recess that is a recess formed in either one of a second stem or a first stem and is formed with a groove at a predetermined position on an inner circumferential surface of the recess; a second recess formed in another one thereof; a stem pin accommodated in both of the recesses; an urging member that is accommodated in the first recess and urges the stem pin to the other side; a sidewall through-hole that penetrates a sidewall of the second recess horizontally; and a ball that enters the sidewall through-hole.Type: ApplicationFiled: August 26, 2021Publication date: January 18, 2024Applicant: FUJIKIN INCORPORATEDInventors: Souta Hachiman, Keisuke Ishibashi, Tadayuki Yakushijin, Yusei Horikawa, Michio Yamaji
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Patent number: 11859733Abstract: A valve device comprising: a flow passage block in which a flow passage is formed; a diaphragm configured to open and close the flow passage; an actuator configured to push down the diaphragm via a diaphragm holder; a tubular bonnet formed with an internal thread on an inner circumferential surface, the bonnet being configured to join the flow passage block and the actuator; a tubular adjusting screw threaded to the internal thread, the adjusting screw being configured to come into contact with the diaphragm holder to adjust a valve opening position of the diaphragm; and an annular lock nut configured to lock the adjusting screw by being screwed into the internal thread.Type: GrantFiled: June 10, 2020Date of Patent: January 2, 2024Assignee: FUJIKIN INCORPORATEDInventors: Akihiro Harada, Tomohiro Nakata, Takeru Miura, Michio Yamaji, Tadayuki Yakushijin, Keisuke Ishibashi
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Patent number: 11630058Abstract: 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: June 10, 2022Date of Patent: April 18, 2023Assignee: FUJIKIN INCORPORATEDInventors: Masaaki Nagase, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
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Publication number: 20220397203Abstract: Provided is an actuator including a ball-type thrust amplifier therein that controls a valve in which a high-pressure fluid flows, and having less wear between members and a long lifespan. This actuator for a valve includes a thrust amplification mechanism therein, in which the thrust amplification mechanism includes a disk, a ball presser, a stem, and a plurality of balls that are sandwiched by and in contact with an upper surface of the disk, a tapered surface of the ball presser, and a tapered surface of the stem and disposed to move outward as the stem moves downward, the surfaces of the parts constituting the thrust amplification mechanism are coated with grease containing an additive, and the additive of the grease includes at least chloroalkane.Type: ApplicationFiled: November 4, 2020Publication date: December 15, 2022Applicant: FUJIKIN INCORPORATEDInventors: Keisuke Ishibashi, Tadayuki Yakushijin, Ryo Tangotani, Tadanobu Yoshida, Michio Yamaji, Shoichi Uruno
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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: 20220290764Abstract: A valve device comprising: a flow passage block in which a flow passage is formed; a diaphragm configured to open and close the flow passage; an actuator configured to push down the diaphragm via a diaphragm holder; a tubular bonnet formed with an internal thread on an inner circumferential surface, the bonnet being configured to join the flow passage block and the actuator; a tubular adjusting screw threaded to the internal thread, the adjusting screw being configured to come into contact with the diaphragm holder to adjust a valve opening position of the diaphragm; and an annular lock nut configured to lock the adjusting screw by being screwed into the internal thread.Type: ApplicationFiled: June 10, 2020Publication date: September 15, 2022Inventors: AKIHIRO HARADA, TOMOHIRO NAKATA, TAKERU MIURA, MICHIO YAMAJI, TADAYUKI YAKUSHIJIN, KEISUKE ISHIBASHI
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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: 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: 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: 11255468Abstract: A gasket includes a thick portion providing a first face seal and a thin portion providing a second face seal. A fluid coupling has an annular gasket housing recess that includes a wide portion for housing the thick portion of the gasket and a narrow portion for housing the thin portion of the gasket.Type: GrantFiled: March 25, 2016Date of Patent: February 22, 2022Assignees: FUJIKIN INCORPORATED, TOKYO ELECTRON LIMITEDInventors: Keisuke Ishibashi, Tadayuki Yakushijin, Tsuyoshi Tanikawa, Michio Yamaji, Tsuneyuki Okabe
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Publication number: 20220034794Abstract: 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: September 17, 2019Publication date: February 3, 2022Applicant: FUJIKIN INCORPORATEDInventors: Masaaki NAGASE, Kazuteru TANAKA, Keiji HIRAO, Tadayuki YAKUSHIJIN, Kouji NISHINO, Michio YAMAJI, Nobukazu IKEDA
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Patent number: 11226257Abstract: A fluid controller is provided having a flow path through which a fluid can flow, a closed space separated from the flow path by an isolation member, and a leak port capable of communicating the closed space with an external part. An anomaly detection device for detecting an anomaly has a pressure sensor detachably fixed to the leak port, a pressure sensor for detecting the pressure in the closed space, a processing module for executing a predetermined information processing, and an detachable mechanism for blocking the leak port from the external part in the state of being fixed. The processing module determines an anomaly of the fluid controller by comparing a detection value detected by the pressure sensor to a predetermined threshold, and transmits a discrimination result of the anomaly of the fluid controller to a server.Type: GrantFiled: February 6, 2018Date of Patent: January 18, 2022Assignee: Fujikin Inc.Inventors: Akihiro Harada, Kouji Nishino, Ryousuke Dohi, Koji Kawada, Katsuyuki Sugita, Nobukazu Ikeda, Michio Yamaji, Tsutomu Shinohara, Ryutaro Tanno, Yuto Kawauchi
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Patent number: 11041566Abstract: Provided are a seal structure in which sealing performance is ensured over a long period of time even when it is used for low-temperature fluids, a sealing method, and a coupling including the seal structure. The seal structure includes an annular gasket interposed between a first member and a second member. The first member is provided on its surface facing the gasket with: a first surface located on the inner diameter side; a first annular protrusion located on the outer diameter side of the first surface; a second surface located on the outer diameter side of the first protrusion; a second annular protrusion located on the outer diameter side of the second surface and having a greater protruding amount with respect to the second surface than that of the first protrusion; and a third surface located on the outer diameter side of the second protrusion.Type: GrantFiled: October 26, 2017Date of Patent: June 22, 2021Assignee: FUJIKIN INCORPORATEDInventors: Koji Hiramatsu, Michio Yamaji, Kunihiko Daido, Tadayuki Yakushijin, Yasumasa Yanagida, Takashi Funakoshi
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Patent number: 11035493Abstract: Provided is a small-sized controller capable of precisely controlling a flow rate of a high-pressure fluid. Between a working shaft of a drive device and a valve stem, a power transmission device is disposed to amplify a force acting on the working shaft and transmit the resultant force to the valve stem. A diaphragm as a valve element is made of metal and is deformable to: a state where a fluid passage is fully closed; a state where the fluid passage is fully open; or a state where the fluid passage is partially open. When the fluid passage is partially open, on the basis of the flow rate of a fluid flowing through fluid passages, the drive device finely adjusts the position of the working shaft such that the flow rate is constant.Type: GrantFiled: March 27, 2018Date of Patent: June 15, 2021Assignee: FUJIKIN INCORPORATEDInventors: Keisuke Ishibashi, Michio Yamaji, Tadayuki Yakushijin, Shunji Obara, Keigo Kobayashi
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Patent number: 10976240Abstract: A concentration measurement device for measuring the concentration of a measured fluid within a measurement cell by detecting transmitted light that has passed through the measurement cell having a light incidence window and a light emission window disposed opposing to each other, comprising a reflected-light detector for detecting reflected light of the light incidence window.Type: GrantFiled: August 9, 2016Date of Patent: April 13, 2021Assignees: TOKUSHIMA UNIVERSITY, FUJIKIN INCORPORATEDInventors: Yoshihiro Deguchi, Masaaki Nagase, Michio Yamaji, Nobukazu Ikeda, Kouji Nishino, Masayoshi Kawashima, Kazuteru Tanaka
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Publication number: 20210018103Abstract: A diaphragm valve configured to allow for adjustment of a Cv value during assembly of the diaphragm valve is provided. A valve body, a diaphragm, an actuator, a bonnet, a stem, and a diaphragm holder are provided, the bonnet includes a through hole coaxial with the stem and formed with a female thread, the cylindrical body formed with a male thread on an outer surface is screwed into the through hole in engagement with the female thread, the stem is inserted into the cylindrical body, a diaphragm side end surface of the cylindrical body protrudes from an opening surface of the through hole on the diaphragm side toward a diaphragm, a stem side end surface of the diaphragm holder comes into abutment with the diaphragm side end surface of the cylindrical body, so that a position of the abutted surfaces in an axial direction of the stem is adjusted by a degree of adjustment between the male thread and the female thread.Type: ApplicationFiled: September 17, 2019Publication date: January 21, 2021Applicant: FUJIKIN INCORPORATEDInventors: Tadayuki Yakushijin, Keisuke Ishibashi, Michio Yamaji, Akihiro Harada
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Patent number: 10753497Abstract: A first on-off valve (2) and a second on-off valve (3) each are a two-port valve. A first passage block (5) is provided with a first on-off valve-corresponding inflow passage (11) and a first on-off valve-corresponding outflow passage (12). A second passage block (6) is provided with a second on-off valve-corresponding inflow passage (14) and a second on-off valve-corresponding outflow passage (15). The second on-off valve-corresponding outflow passage (15) is in communication with an upstream side portion of the first on-off valve-corresponding outflow passage (12) via a communicating passage (13) formed in the first passage block (5). An orifice (20) is provided between the second on-off valve-corresponding outflow passage (15) and the communicating passage (13).Type: GrantFiled: April 5, 2016Date of Patent: August 25, 2020Assignee: FUJIKIN INCORPORATEDInventors: Keisuke Ishibashi, Tsuyoshi Tanikawa, Michio Yamaji, Takashi Funakoshi, Hidenori Kiso, Tsuneyuki Okabe, Hiroaki Kikuchi, Kuniyasu Sakashita
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Patent number: 10738898Abstract: Provided is a switching valve for use in an analyzer module for switching flow passages of fluids, in which the manufacturing cost is reduced and the life is increased. The valve element is provided with a lower contact portion that comes into close contact with a lower valve seat disposed at a valve body when a valve is closed, and with an upper contact portion that comes into close contact with an upper valve seat disposed at a counter plate when the valve is open. The counter plate has a first recess that is open downward and a second recess that is open toward the first recess and has a smaller horizontal cross-sectional area than that of the first recess, and the upper valve seat is press-fitted into the second recess.Type: GrantFiled: January 30, 2018Date of Patent: August 11, 2020Assignee: FUJIKIN INCORPORATEDInventors: Keisuke Ishibashi, Tadayuki Yakushijin, Ryohei Fujimoto, Norifumi Suntou, Michio Yamaji, Yasuhiro Yoshikane
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Patent number: 10731763Abstract: A valve element significantly improved in rotation preventing performance of an abutting member formed of a synthetic resin by using a caulking structure and a high-temperature-oriented valve provided with such a valve element. A valve element includes: an abutting member formed of a synthetic resin and configured to close a path opening by coming into abutment with a path opening edge, and a holding member having a recessed portion into which the abutting member is fitted, in which the holding member is caulked and thus the abutting member is held by the holding member. The holding member is provided with a plurality of notches at a portion to be caulked.Type: GrantFiled: February 18, 2015Date of Patent: August 4, 2020Assignee: FUJIKIN INCORPORATEDInventors: Keisuke Ishibashi, Michio Yamaji, Tsuyoshi Tanikawa