Patents by Inventor Akihisa Oka

Akihisa Oka 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: 11608758
    Abstract: A hydrogen/oxygen stoichiometric combustion turbine system includes: a high-pressure steam turbine (2); a low-pressure steam turbine (3); and a heater (5) disposed between the high-pressure and low-pressure steam turbines. The heater (5) has a combustion portion (53) in which stoichiometric combustion of hydrogen and oxygen is caused, and a mixing portion (55) configured to mix discharged steam (S4) from the high-pressure steam turbine (2) with combustion gas (R) from the combustion portion (53) and to supply the obtained product to the low-pressure steam turbine (3).
    Type: Grant
    Filed: July 31, 2019
    Date of Patent: March 21, 2023
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kazuhiko Tanimura, Hikaru Sano, Satoshi Nakayama, Naoki Miyake, Akihisa Oka
  • Patent number: 11286851
    Abstract: A gas turbine engine configured to combust, by means of a combustor, a compressed air obtained through compression by a compressor, and drive a turbine with use of high-temperature and high-pressure combustion gas generated by the combustion, the gas turbine engine including: a plurality of air passages through which different portions in the gas turbine engine communicate with one another; and a switching device configured to switch air flow paths between the plurality of air passages, wherein the plurality of air passages are each formed by an air pipe disposed outside a compressor casing, and the switching device is mounted to an outer surface of the compressor casing via a heat insulation member.
    Type: Grant
    Filed: June 14, 2019
    Date of Patent: March 29, 2022
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Satoshi Nakayama, Akihisa Oka, Hiroki Seike
  • Patent number: 11053856
    Abstract: A starting device for driving a compressor-side rotary shaft of a two-shaft type gas turbine engine at a time of starting the gas turbine engine includes: a starter motor serving as a drive source for the compressor-side rotary shaft; a speed increaser configured to increase a speed of rotation of the starter motor; and a clutch mechanism configured to disconnectably connect the starter motor and the compressor-side rotary shaft with each other, the clutch mechanism being provided between the compressor-side rotary shaft and the speed increaser.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: July 6, 2021
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Satoshi Nakayama, Akihisa Oka, Hiroki Seike
  • Publication number: 20200032714
    Abstract: A starting device for driving a compressor-side rotary shaft of a two-shaft type gas turbine engine at a time of starting the gas turbine engine includes: a starter motor serving as a drive source for the compressor-side rotary shaft; a speed increaser configured to increase a speed of rotation of the starter motor; and a clutch mechanism configured to disconnectably connect the starter motor and the compressor-side rotary shaft with each other, the clutch mechanism being provided between the compressor-side rotary shaft and the speed increaser.
    Type: Application
    Filed: June 13, 2019
    Publication date: January 30, 2020
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Satoshi NAKAYAMA, Akihisa OKA, Hiroki SEIKE
  • Publication number: 20190390577
    Abstract: A hydrogen/oxygen stoichiometric combustion turbine system includes: a high-pressure steam turbine (2); a low-pressure steam turbine (3); and a heater (5) disposed between the high-pressure and low-pressure steam turbines. The heater (5) has a combustion portion (53) in which stoichiometric combustion of hydrogen and oxygen is caused, and a mixing portion (55) configured to mix discharged steam (S4) from the high-pressure steam turbine (2) with combustion gas (R) from the combustion portion (53) and to supply the obtained product to the low-pressure steam turbine (3).
    Type: Application
    Filed: July 31, 2019
    Publication date: December 26, 2019
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Kazuhiko TANIMURA, Hikaru SANO, Satoshi NAKAYAMA, Naoki MIYAKE, Akihisa OKA
  • Publication number: 20190292991
    Abstract: A gas turbine engine configured to combust, by means of a combustor, a compressed air obtained through compression by a compressor, and drive a turbine with use of high-temperature and high-pressure combustion gas generated by the combustion, the gas turbine engine including: a plurality of air passages through which different portions in the gas turbine engine communicate with one another; and a switching device configured to switch air flow paths between the plurality of air passages, wherein the plurality of air passages are each formed by an air pipe disposed outside a compressor casing, and the switching device is mounted to an outer surface of the compressor casing via a heat insulation member.
    Type: Application
    Filed: June 14, 2019
    Publication date: September 26, 2019
    Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Satoshi NAKAYAMA, Akihisa Oka, Hiroki Seike
  • Patent number: 5327372
    Abstract: A CAM cell array for storing a logical address is divided into first to third CAM sections. A first partition switch circuit intervenes between a zeroth piece of sense line connected to a sense circuit and a first piece of sense line for the first CAM section. The sense circuit is a circuit for selecting a RAM cell array in which a physical address to be read out is stored. A second partition switch circuit intervenes between the first piece of sense line and a second piece of sense line for the second CAM section. A third partition switch circuit intervenes between the second piece of sense line and a third piece of sense line for the third CAM section. By controlling switching operation of respective partition switch circuits according to page size, optimum length of the sense line is utilized, thus achieving a high-speed address translation.
    Type: Grant
    Filed: January 14, 1993
    Date of Patent: July 5, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Akihisa Oka, Seiji Yamaguchi
  • Patent number: 5249134
    Abstract: A method of processing layout data of an integrated circuit including several circuit blocks and inter-block routing among the circuit blocks on data verification. The method includes the steps of processing layout data within at least one of the circuit blocks and replacing the layout data within that circuit block with layout data in a peripheral neighborhood region of that circuit block to process the replaced layout data.
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: September 28, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Akihisa Oka