Patents by Inventor Akihiko Saito

Akihiko Saito 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).

  • Patent number: 10550716
    Abstract: A control device is configured to control a gas turbine that is configured to compress a suctioned air with a compressor to obtain compressed air, mix a fuel supplied from a combustor with the compressed air to burn the fuel and the compressed air to generate a combustion gas, operate a turbine with the combustion gas to rotate a rotor, and discharge the combustion gas that has operated the turbine as a flue gas. The compressor includes an inlet guide vane which is capable of adjusting a degree of opening and is on an air-suction side, and the control device is configured to execute temperature adjustment control to control the degree of opening of the inlet guide vane along a temperature adjustment line indicating an upper limit temperature of a flue gas temperature defined according to a load of the gas turbine.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: February 4, 2020
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Akihiko Saito, Takashi Sonoda, Yoshifumi Iwasaki, Koji Takaoka, Ryuji Takenaka, Kozo Toyama
  • Publication number: 20200032713
    Abstract: A gas turbine combined cycle plant includes a fuel gas heater configured to heat fuel gas to be supplied to a combustor of a gas turbine using heated water heated by an exhaust heat recovery boiler; a return valve disposed on a heated water returning line to return heated water passing through the heater to the boiler; a dump valve disposed on a condensate line bifurcated from the heated water returning line between the return valve and the heater to return the heated water to a condenser; and a control unit configured to control operation of the return and dump valves. When load of the turbine falls below a lower limit, the control unit closes the return valve and keeps the opening degree of the dump valve at a specified degree to reduce a flow rate of the heated water flowing in the heater for a predetermined time.
    Type: Application
    Filed: April 4, 2018
    Publication date: January 30, 2020
    Inventors: Yuki NAKAZAWA, Akihiko SAITO, Hiroyuki NAKAGAWA, Ryo KOTO
  • Publication number: 20190383222
    Abstract: A gas turbine control device includes a first estimation unit configured to estimate a first temperature which is a turbine inlet temperature estimation value based on a first model which is a physical model using a fuel flow rate to a gas turbine; a second estimation unit configured to estimate a second temperature which is a turbine inlet temperature estimation value based on a second model which is a physical model using an exhaust gas temperature of the gas turbine; and a correction unit configured to correct the first temperature on the basis of the second temperature to calculate a turbine inlet temperature estimation value.
    Type: Application
    Filed: February 22, 2018
    Publication date: December 19, 2019
    Inventors: Kazushige TAKAKI, Akihiko SAITO, Ryuji TAKENAKA, Koshiro FUKUMOTO, Yoshifumi IWASAKI
  • Patent number: 10465608
    Abstract: A temperature control device includes a temperature difference calculation unit that calculates a temperature difference between an inlet and an outlet of a boost compressor on the basis of a pressure ratio of the inlet and the outlet of the boost compressor and an IGV opening degree of the boost compressor, the boost compressor outputting cooling air obtained by cooling compressed air from a compressor to a cooling target; a temperature information calculation unit that calculates temperature information for feedback control for at least one of the inlet and the outlet of the boost compressor on the basis of the temperature difference between the inlet and the outlet of the boost compressor; and a control unit that performs feedback control by using the temperature information for feedback control such that at least one of an inlet temperature and an outlet temperature of the boost compressor approaches a setting value.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: November 5, 2019
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Akihiko Saito, Takashi Sonoda, Tetsuya Yabe, Satoko Fujii, Kazuya Higashi
  • Publication number: 20190331031
    Abstract: A control system controls a temperature of a fuel which is supplied to a combustor of a gas turbine via a fuel gas heater, which heats the fuel of the gas turbine, by adjusting a flow rate of heated water which is supplied to the fuel gas heater. The control system includes a water flow rate adjusting unit that adjusts the flow rate of the heated water which is supplied to the fuel gas heater based on a difference between a target temperature of the fuel and the temperature of the fuel on an outlet side of the fuel gas heater.
    Type: Application
    Filed: January 11, 2018
    Publication date: October 31, 2019
    Inventors: Yuki NAKAZAWA, Akihiko SAITO, Hiroyuki NAKAGAWA, Ryo KOTO
  • Publication number: 20190332913
    Abstract: An RFID tag includes an antenna extending in a longitudinal direction and a reinforcing member extending such that the center thereof projects to opposite sides in a transverse direction. The reinforcing member includes first and second crossover edge portions crossing with the antenna at one and the other side in the longitudinal direction, a first inclination edge portion inclined so as to approach the antenna from the center side toward one side in the longitudinal direction, a second inclination edge portion inclined so as to approach the antenna from the center side toward the other side in the longitudinal direction, a third inclination edge portion inclined so as to approach the antenna from the center side toward one side in the longitudinal direction, and a fourth inclination edge portion inclined so as to approach the antenna from the center side toward the other side in the longitudinal direction.
    Type: Application
    Filed: March 27, 2019
    Publication date: October 31, 2019
    Applicants: FUJITSU LIMITED, FUJITSU FRONTECH LIMITED
    Inventors: Hiroshi Onuki, Shunji Baba, Yoshiyasu Sugimura, Tsuyoshi Niwata, Hideo Miyazawa, Mimpei Miura, Akihiko Saito
  • Patent number: 10420741
    Abstract: The present invention includes cilastatin or a pharmaceutically acceptable salt thereof as an active component and a suppressant for renal impairment or inner ear disorders, induced via megalin by at least one megalin ligand which is selected from the group consisting of polymyxins, aminoglycoside antibiotics, glycopeptide antibiotics, cisplatin, and pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: July 21, 2016
    Date of Patent: September 24, 2019
    Assignees: EA Pharma Co., Ltd., Niigata University
    Inventors: Akihiko Saito, Nobumasa Aoki, Yoshihisa Hori, Shoji Kuwahara, Michihiro Hosojima, Hiroshi Iwata, Saori Matsuda
  • Publication number: 20190063335
    Abstract: A gas turbine control device includes a detection value acquisition unit that acquires a detection value of at least one of a supply amount of fuel, pressure of compressed air, and electric power generated by a generator; a flue gas temperature acquisition unit that acquires a flue gas temperature detection value; a combustion gas temperature estimate value calculation unit that calculates a combustion gas temperature estimate value based on the detection value; a correction term acquisition unit that calculates a correction term based on a ratio between the combustion gas temperature estimate value and the flue gas temperature detection value; a corrected combustion gas temperature estimate value calculation unit that corrects the combustion gas temperature estimate value using the correction term to calculate a corrected combustion gas temperature estimate value; and a gas turbine controller that controls the gas turbine based on the corrected combustion gas temperature estimate value.
    Type: Application
    Filed: December 9, 2016
    Publication date: February 28, 2019
    Inventors: Kazushige TAKAKI, Akihiko SAITO, Ryuji TAKENAKA, Yoshifumi IWASAKI, Shinichi YOSHIOKA, Tatsuji TAKAHASHI, Tomohide AKIYAMA
  • Publication number: 20190023166
    Abstract: Provided is an assist grip handle storing an escape hammer. The handle is to be attached to an interior space of a vehicle, and includes a bar-shaped grip portion; a curved portion continuous with at least one end of the grip portion; and an attachment portion continuous with the curved portion and attached to an interior member of the vehicle. Since provided inside the grip portion is a storage portion continuous with an opening section formed at the curved portion side, and an escape hammer is stored in the storage portion, the hammer can be stored in the handle in a compact manner. Since there are provided a biasing member biasing the hammer toward the opening section side; a regulation portion for regulating the hammer; and a push button for releasing the restriction by the regulation portion, the hammer can be easily installed in and removed from the handle.
    Type: Application
    Filed: February 28, 2017
    Publication date: January 24, 2019
    Applicant: HONDA ACCESS CORP.
    Inventors: Shinpei Takenaka, Akihiko Saito
  • Patent number: 10161317
    Abstract: A gas turbine drives a power generator by rotating a turbine using combustion gas generated in a combustor as a result of supplying the combustor with fuel and compressed air from a compressor, which is provided with an inlet guide vane at a front stage. An operation control device of the gas turbine enables an IGV priority open flag when the inlet guide vane is not fully open and when the system frequency is lower than or equal to a predetermined threshold value ? or there is a request for increasing the output of the gas turbine. When the IGV priority open flag is enabled, the operation control device sets the degree of opening of the inlet guide vane to be larger than before. Accordingly, the output can be increased without having to increase the turbine inlet temperature, regardless of the operational state of the gas turbine.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: December 25, 2018
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Takashi Sonoda, Kazuya Higashi, Akihiko Saito
  • Patent number: 9968677
    Abstract: A method for maintaining the biological activity in a protein formulation without adding an antioxidant and for inhibiting the formation of insoluble particles, comprising adding to the protein formulation a poloxamer as a surfactant.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: May 15, 2018
    Assignee: CHUGAI SEIYAKU KABUSHIKI KAISHA
    Inventors: Akihiko Saito, Eiichi Miyauchi
  • Publication number: 20180103564
    Abstract: The present invention relates to an electromagnetic wave absorbing body which is a sheet-like electromagnetic wave absorbing body in which particles including a soft magnetic material are dispersed in a matrix including a non-metal material, in which the electromagnetic wave absorbing body satisfies a relationship: ???, in which ? is a parameter given by Equation (1): ?=Ad(??)0.5/(??+???/?), in which d is a thickness of the electromagnetic wave absorbing body, ?, ??, ?, and ?? are a permittivity of the electromagnetic wave absorbing body, a loss term of ?, a permeability of the electromagnetic wave absorbing body, and a loss term of ?, respectively, and A is equal to 8×104/?(?/m).
    Type: Application
    Filed: September 26, 2017
    Publication date: April 12, 2018
    Inventors: Akihiko SAITO, Yu NAKAMA, Mikiko TSUTSUI, Tadashi HATTORI
  • Patent number: 9894784
    Abstract: A display apparatus including: a display panel; and a chassis structure which holds the display panel, wherein the chassis structure includes a first chassis member in which a recess whose opening opens toward a display panel side is formed, and a second chassis member which is in a plate shape, and mounted on the first chassis member, covering at least a portion of the opening of the recess.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: February 13, 2018
    Assignee: JOLED INC.
    Inventors: Akihiko Saito, Yoshihiro Taniguchi
  • Publication number: 20180012687
    Abstract: The present invention relates to a soft magnetic alloy containing: Ni, and at least one element selected from the group consisting of Al, Si and V, with the balance being Fe and inevitable impurities, in which, when the content of Ni and the total content of Al, Si and V are expressed by [Ni] and [M], respectively in mass %, and a relationship between [Ni] and [M] is plotted, the coordinate ([Ni], [M]) is present in a region surrounded by the straight lines A, B, C, D, and E.
    Type: Application
    Filed: July 6, 2017
    Publication date: January 11, 2018
    Inventors: Akihiko SAITO, Takeshi TAKANO, Yu NAKAMA
  • Publication number: 20170254282
    Abstract: Provided is a control device of a gas turbine including a compressor, a combustor, and a turbine. The control device executes load control of allowing an operation control point for operation control of a gas turbine to vary in response to a load of the gas turbine. The operation of the gas turbine is controlled on the basis of a rated temperature adjustment line for temperature adjustment control of a flue gas temperature at a predetermined load to a rated flue gas temperature at which performance of the gas turbine becomes rated performance, a preceding setting line for setting of the flue gas temperature at the predetermined load to a preceding flue gas temperature that becomes lower in precedence to the rated flue gas temperature, and a limit temperature adjustment line for temperature adjustment control.
    Type: Application
    Filed: June 16, 2015
    Publication date: September 7, 2017
    Inventors: Takashi SONODA, Akihiko SAITO, Yoshifumi IWASAKI, Ryuji TAKENAKA, Kozo TOYAMA, Koji TAKAOKA
  • Patent number: 9732676
    Abstract: A valve control device is provided in a gas turbine having a combustor for generating combustion gas, a turbine driven by the combustion gas generated by the combustor, a flow rate regulating valve for regulating the flow rate of the fuel to be supplied to the combustor, and a pressure regulating valve disposed upstream of the flow rate regulating valve, for regulating the fuel pressure. The valve control device controls the opening degree of the valve. The valve control device includes a load decrease detection part which detects a load decrease of the gas turbine, and a pressure control part which controls the opening degree of the valve in accordance with the output of the gas turbine. The valve control device suppresses instability of the gas turbine output even when the load rapidly decreases.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: August 15, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Akihiko Saito, Takashi Sonoda, Takafumi Uda, Fuminori Fujii
  • Publication number: 20170211409
    Abstract: A control device 14 of a gas turbine that compresses a suctioned air with a compressor to obtain compressed air, mixes a fuel supplied from a combustor with the compressed air to burn the fuel and the compressed air to obtain a combustion gas, operates a turbine with the generated combustion gas to rotate a rotor, and discharges the combustion gas that has operated the turbine as a flue gas, the compressor including an inlet guide vane capable of adjusting the degree of opening and provided on an air-suction side, and temperature adjustment control to control the degree of opening of an inlet guide vane being executed along a temperature adjustment line indicating an upper limit temperature of a flue gas temperature defined according to a load of the gas turbine.
    Type: Application
    Filed: June 16, 2015
    Publication date: July 27, 2017
    Inventors: Akihiko SAITO, Takashi SONODA, Yoshifumi IWASAKI, Koji TAKAOKA, Ryuji TAKENAKA, Kozo TOYAMA
  • Publication number: 20170146553
    Abstract: Provided is a test method for the assessment of the necessity of renal biopsy in a subject to be tested, who is suspected of having a renal disease. Specifically provided are a test method for a renal disease, including using urinary podocalyxin and one or more additional markers in combination, and a test reagent for use in the test method and a test reagent kit for use in the test method. The present invention allows the discrimination of a poor prognosis group even for poor prognosis cases with no overt findings in a conventional test method, and thus allows the assessment of a renal disease, the assessment of the necessity of renal biopsy, prognostic prediction, and the like to be performed exactly.
    Type: Application
    Filed: January 9, 2017
    Publication date: May 25, 2017
    Applicants: Niigata University, Juntendo Educational Foundation, Denka Seiken Co. Ltd.
    Inventors: Masanori HARA, Akihiko SAITO, Yasuhiko TOMINO, Katsuhiko ASANUMA, Hiroyuki KUROSAWA, Shinya OGASAWARA, Yoshiaki HIRAYAMA
  • Publication number: 20170146554
    Abstract: Provided is a test method for the detection of diabetic nephropathy at an early stage as compared to a conventional method. Specifically provided are: a test method for diabetic nephropathy, including detecting urinary podocalyxin; the test method, further including assessing diabetic nephropathy at at least Stage I; a test reagent for use in the test method; and a test reagent kit for use in the test method. The present invention is based on a finding that urinary podocalyxin reflects the development and condition of diabetic nephropathy with high sensitivity at an early stage as compared to urinary albumin.
    Type: Application
    Filed: January 9, 2017
    Publication date: May 25, 2017
    Applicants: Niigata University, Juntendo Educational Foundation, Denka Seiken Co. Ltd.
    Inventors: Masanori HARA, Akihiko SAITO, Yasuhiko TOMINO, Katsuhiko ASANUMA, Hiroyuki KUROSAWA, Shinya OGASAWARA, Yoshiaki HIRAYAMA
  • Patent number: 9631559
    Abstract: A fuel control method for a gas turbine with a combustor being formed of at least two groups of a pluralities of main nozzles for supplying fuel, and that supplies fuel from the main nozzles of all groups upon ignition of the combustor (S1), and supplies fuel from three main nozzles of a group A during subsequent acceleration of the gas turbine (S3). Because fuel is injected from a small number of the main nozzles during acceleration, the fuel flow rate per one main nozzle is increased, thereby increasing the fuel-air ratio (fuel flow rate/air flow rate) in a combustion region and improving the combustion characteristics. Accordingly, the generation of carbon monoxide and unburned hydrocarbon is reduced, whereby no bypass valve is required and manufacturing costs are reduced.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: April 25, 2017
    Assignee: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
    Inventors: Sosuke Nakamura, Satoshi Tanimura, Shinji Akamatsu, Shinsuke Nakamura, Takashi Sonoda, Akihiko Saito, Makoto Kishi