Patents by Inventor Keiji Hirao

Keiji Hirao 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).

  • Publication number: 20240003006
    Abstract: Provided are a vaporizer and a gas supply apparatus both of which are compact and capable of supplying gas at a high flow rate, and a method of controlling the gas supply apparatus. The vaporizer includes: a heat-exchanging section that is configured to heat a liquid raw material; and a vaporizing section that is configured to vaporize the heated liquid raw material to form a raw material gas. The heat-exchanging section includes: a branched section to which the liquid raw material is supplied and in which the liquid raw material is branched; and thin tubes each connected to the branched section.
    Type: Application
    Filed: September 27, 2021
    Publication date: January 4, 2024
    Inventors: Yuta AYAI, Keiji HIRAO
  • Patent number: 11630058
    Abstract: 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: Grant
    Filed: June 10, 2022
    Date of Patent: April 18, 2023
    Assignee: FUJIKIN INCORPORATED
    Inventors: Masaaki Nagase, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
  • Publication number: 20220299432
    Abstract: 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: Application
    Filed: June 10, 2022
    Publication date: September 22, 2022
    Applicant: FUJIKIN INCORPORATED
    Inventors: Masaaki NAGASE, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
  • Patent number: 11390951
    Abstract: 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: Grant
    Filed: July 20, 2018
    Date of Patent: July 19, 2022
    Assignee: FUJIKIN INCORPORATED
    Inventors: Atsushi Hidaka, Takatoshi Nakatani, Keisuke Nakatsuji, Keiji Hirao, Yukio Minami, Nobukazu Ikeda
  • Patent number: 11391668
    Abstract: 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: Grant
    Filed: September 17, 2019
    Date of Patent: July 19, 2022
    Assignee: FUJIKIN INCORPORATED
    Inventors: Masaaki Nagase, Kazuteru Tanaka, Keiji Hirao, Tadayuki Yakushijin, Kouji Nishino, Michio Yamaji, Nobukazu Ikeda
  • Publication number: 20220034794
    Abstract: 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: Application
    Filed: September 17, 2019
    Publication date: February 3, 2022
    Applicant: FUJIKIN INCORPORATED
    Inventors: Masaaki NAGASE, Kazuteru TANAKA, Keiji HIRAO, Tadayuki YAKUSHIJIN, Kouji NISHINO, Michio YAMAJI, Nobukazu IKEDA
  • Publication number: 20200199753
    Abstract: 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: Application
    Filed: July 20, 2018
    Publication date: June 25, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Atsushi HIDAKA, Takatoshi NAKATANI, Keisuke NAKATSUJI, Keiji HIRAO, Yukio MINAMI, Nobukazu IKEDA
  • Publication number: 20200149162
    Abstract: In order to optimally supply a raw material by using a heater, the fluid control device (100) includes a fluid heating section (1) provided with a flow path or a fluid accommodation portion inside, and a heater (10) for heating the fluid heating section, the heater having a heating element (10a) and a metallic heat transfer member (10b) thermally connected to the heating element and arranged so as to surround the fluid heating section, and the surface of the heat transfer member facing the fluid heating section includes a surface (S1) subjected to surface treatment for improving heat dissipation.
    Type: Application
    Filed: July 20, 2018
    Publication date: May 14, 2020
    Applicant: FUJIKIN INCORPORATED
    Inventors: Atsushi HIDAKA, Takatoshi NAKATANI, Keisuke NAKATSUJI, Keiji HIRAO, Yukio MINAMI, Nobukazu IKEDA
  • Patent number: 10646844
    Abstract: A vaporization supply apparatus comprises a vaporizer which heats and vaporize a liquid, a flow-rate control device which controls a flow rate of a gas sent out from the vaporizer, a first control valve interposed in a supply channel of a liquid to the vaporizer, a pressure detector for detecting a pressure of a gas vaporized by the vaporizer, a liquid detection part for measuring parameters of a liquid in an amount higher than a predetermined amount in the vaporizer, and a control device which controls the first control valve to supply a predetermined amount of a liquid to the vaporizer based on the pressure value detected by the pressure detector, and to close the first control valve when the liquid detection part detect a liquid in an amount higher than the predetermined amount.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: May 12, 2020
    Assignee: FUJIKIN INCORPORATED
    Inventors: Atsushi Hidaka, Masaaki Nagase, Kaoru Hirata, Katsuyuki Sugita, Takatoshi Nakatani, Satoru Yamashita, Kouji Nishino, Nobukazu Ikeda, Keiji Hirao
  • Patent number: 10604840
    Abstract: To provide a liquid level indicator and a liquid raw material vaporization feeder, in which the time to detect a switch from the liquid phase to the gas phase has reduced flow rate dependence, and also the detection time can be shortened. The present invention includes a chamber 2 that stores a liquid raw material, at least one protection tube 3 housing a resistance temperature detector for detecting the liquid level L1 in the chamber 2, and a flow controller 4 that controls the flow rate of the gas flowing out from the chamber 2 and feeds the same. The protection tube 3 is horizontally inserted into a sidewall 2a of the chamber 2 and fixed thereto.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: March 31, 2020
    Assignee: FUJIKIN INCORPORATED
    Inventors: Atsushi Hidaka, Masaaki Nagase, Kaoru Hirata, Satoru Yamashita, Keiji Hirao, Kouji Nishino, Nobukazu Ikeda
  • Publication number: 20180071702
    Abstract: A vaporization supply apparatus comprises a vaporizer which heats and vaporize a liquid, a flow-rate control device which controls a flow rate of a gas sent out from the vaporizer, a first control valve interposed in a supply channel of a liquid to the vaporizer, a pressure detector for detecting a pressure of a gas vaporized by the vaporizer, a liquid detection part for measuring parameters of a liquid in an amount higher than a predetermined amount in the vaporizer, and a control device which controls the first control valve to supply a predetermined amount of a liquid to the vaporizer based on the pressure value detected by the pressure detector, and to close the first control valve when the liquid detection part detect a liquid in an amount higher than the predetermined amount.
    Type: Application
    Filed: April 11, 2016
    Publication date: March 15, 2018
    Applicant: FUJIKIN INCORPORATED
    Inventors: Atsushi HIDAKA, Masaaki NAGASE, Kaoru HIRATA, Katsuyuki SUGITA, Takatoshi NAKATANI, Satoru YAMASHITA, Kouji NISHINO, Nobukazu IKEDA, Keiji HIRAO
  • Publication number: 20170327949
    Abstract: [Problem] To provide a liquid level indicator and a liquid raw material vaporization feeder, in which the time to detect a switch from the liquid phase to the gas phase has reduced flow rate dependence, and also the detection time can be shortened. [Means for Resolution] The present invention includes a chamber 2 that stores a liquid raw material, at least one protection tube 3 housing a resistance temperature detector for detecting the liquid level L1 in the chamber 2, and a flow controller 4 that controls the flow rate of the gas flowing out from the chamber 2 and feeds the same. The protection tube 3 is horizontally inserted into a sidewall 2a of the chamber 2 and fixed thereto.
    Type: Application
    Filed: November 2, 2015
    Publication date: November 16, 2017
    Inventors: Atsushi Hidaka, Masaaki Nagase, Kaoru Hirata, Satoru Yamashita, Keiji Hirao, Kouji Nishino, Nobukazu Ikeda
  • Patent number: 9012583
    Abstract: The present invention provides a flow improver for oils and fats, by which a sufficient improvement in the flowability of oils and fats can be achieved, when oils and fats are used as fuels. This flow improver for oils and fats comprises a polymer including constitutional units (I), (II), and (III), and having a weight-average molecular weight in the range of 5,000 to 100,000. The molar fraction a of the constitutional unit (I) is in the range of 0.4 to 0.8, the molar fraction b of the constitutional unit (II) is in the range of 0.1 to 0.3, and the molar fraction c of the constitutional unit (III) is in the range of 0.1 to 0.3.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: April 21, 2015
    Assignee: NOF Corporation
    Inventors: Fumitaka Yoshikawa, Hideki Kawamoto, Keiji Hirao
  • Patent number: 8724974
    Abstract: A vaporizer, capable of stabilizing the behavior of pressure inside the vaporizer, includes a chamber having an inlet and an outlet, a heating device that heats the inside of the chamber, a partition wall structure 13 that is provided inside the vaporizer and partitions the liquid material inside the chamber into a plurality of sections, and liquid distribution portions 20 that are provided at the lower portion of the partition wall structure 13 and that allow liquid distribution among the sections partitioned by the partition wall structure 13, and the partition wall structure includes a grid-like, honeycomb-shaped, mesh-like, or pipe-shaped partition wall.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: May 13, 2014
    Assignees: Fujikin Incorporated, Tohoku University
    Inventors: Tadahiro Ohmi, Yasuyuki Shirai, Masaaki Nagase, Satoru Yamashita, Atsushi Hidaka, Ryousuke Dohi, Kouji Nishino, Nobukazu Ikeda, Keiji Hirao
  • Patent number: 8469046
    Abstract: The method for parallel operation of moisture generating reactors according to the present invention operates so that an orifice, provided with an orifice hole having a predetermined opening diameter, is disposed on a mixed-gas inlet side of each of a plurality of moisture generating reactors connected in parallel with each other, and mixed gas G consisting of hydrogen and oxygen is supplied from a mixer to each of the moisture generating reactors through each orifice, and the flows of moisture generated by the moisture generating reactors are combined, and the resulting combined moisture is supplied to an apparatus that uses high-purity water. Thus, a need to increase the amount of high-purity water supply is met by allowing a plurality of moisture generating reactors to perform a parallel water generating operation by branching off a mixed gas consisting of H2 and O2 by using a simple orifice construction.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: June 25, 2013
    Assignee: Fujikin Incorporated
    Inventors: Yukio Minami, Keiji Hirao, Masaharu Taguchi, Toshiro Nariai, Koji Kawada, Akihiro Morimoto, Nobukazu Ikeda
  • Publication number: 20130084059
    Abstract: A vaporizer, capable of stabilizing the behavior of pressure inside the vaporizer, includes a chamber having an inlet and an outlet, a heating device that heats the inside of the chamber, a partition wall structure 13 that is provided inside the vaporizer and partitions the liquid material inside the chamber into a plurality of sections, and liquid distribution portions 20 that are provided at the lower portion of the partition wall structure 13 and that allow liquid distribution among the sections partitioned by the partition wall structure 13, and the partition wall structure includes a grid-like, honeycomb-shaped, mesh-like, or pipe-shaped partition wall.
    Type: Application
    Filed: August 1, 2012
    Publication date: April 4, 2013
    Applicants: TOHOKU UNIVERSITY, FUJIKIN INCORPORATED
    Inventors: Tadahiro Ohmi, Yasuyuki Shirai, Masaaki Nagase, Satoru Yamashita, Atsushi Hidaka, Ryousuke Dohi, Kouji Nishino, Nobukazu Ikeda, Keiji Hirao
  • Publication number: 20120316306
    Abstract: The present invention provides a flow improver for oils and fats, by which a sufficient improvement in the flowability of oils and fats can be achieved, when oils and fats are used as fuels. This flow improver for oils and fats comprises a polymer including constitutional units (I), (II), and (III), and having a weight-average molecular weight in the range of 5,000 to 100,000. The molar fraction a of the constitutional unit (I) is in the range of 0.4 to 0.8, the molar fraction b of the constitutional unit (II) is in the range of 0.1 to 0.3, and the molar fraction c of the constitutional unit (III) is in the range of 0.1 to 0.3.
    Type: Application
    Filed: February 2, 2011
    Publication date: December 13, 2012
    Applicant: NOF CORPORATION
    Inventors: Fumitaka Yoshikawa, Hideki Kawamoto, Keiji Hirao
  • Patent number: 8321573
    Abstract: A communication terminal includes a CPU (28). The CPU (28) issues to a router (16) a send request for requesting the router (16) to send an ask signal for repetitive responses to a server (14). Then, the ask signal is sent to the server (14) by the router (16), and a receive port is temporarily opened. From the server (14), a response signal is repeatedly sent in response to the ask signal. To the response signal, time information representative of a waiting time from receiving an ask signal to its reply is attached. A response signal sent back while the receive port is opened arrives at the communication terminal through the router (16), but a response signal sent back after the receive port is closed is discarded in the router (16). The CPU (28) repeatedly issues a send request to the router (16) regarding a time indicated by time information attached to the response signal lastly received as an issuance cycle (T).
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: November 27, 2012
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Keiji Hirao, Motoe Sakanaka, Tomohiro Yamada
  • Patent number: 8156242
    Abstract: A command processing apparatus includes a CPU (28). The CPU (28) determines whether or not a router (16) is compliant with UPnP, and issues a port releasing request to the router (16) when the determination result is affirmative. Thus, a specific port is released. Next, destination information including an identifier of the specific port is requested to be sent to a server (14). The destination information is sent to the server (14) by the router (16), and the server (14) sends a command to the specific port on the basis of the identifier included in the destination information. When the determination result is negative, an information send request is repeatedly issued. Every issuance, destination information including an identifier of an arbitrary port (response wait port) is sent to the server (14) by the router (16), and the response wait port is temporarily released. The server (14) outputs a command to the response wait port on the basis of the identifier included in the destination information.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: April 10, 2012
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Keiji Hirao, Motoe Sakanaka
  • Publication number: 20120082596
    Abstract: A reactor for moisture generation generates high-purity moisture at a catalytic reaction temperature that is lower than an ignition point of hydrogen gas and oxygen gas so hydrogen and oxygen gas are supplied into the reactor having a platinum catalyst layer to catalyze the reaction of the gases without combustion, wherein the reactor maintains high adhesion strength for a long time of the platinum catalyst layer to a barrier layer provided between the base material and the platinum catalyst layer. The reactor includes a reactor main body that has a gas inlet and a moisture outlet, and the Y2O3 barrier layer is formed on at least a part of an internal wall surface of the reactor main body, and the platinum catalyst layer is formed on at least a part of the Y2O3 barrier layer. A film thickness of the Y2O3 barrier layer is preferably 50 nm to 5 ?m.
    Type: Application
    Filed: October 17, 2011
    Publication date: April 5, 2012
    Applicants: FUJIKIN INCORPORATED, TOHOKU UNIVERSITY
    Inventors: Tadahiro OHMI, Koji KAWADA, Nobukazu IKEDA, Akihiro MORIMOTO, Yukio MINAMI, Keiji HIRAO, Shinji SAKAMOTO, Masafumi KITANO