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Hiroshi Ohta

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  • Hitachi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Air compressor with drain pipe arrangement
    • Patent number 10,711,784
    • Issue date Jul 14, 2020
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Hiroshi Ohta
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Liquid-cooled compressor and method for operating same
    • Patent number 10,578,107
    • Issue date Mar 3, 2020
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Shigeyuki Yorikane
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Control unit for air compressor with graphical user interface
    • Patent number D776675
    • Issue date Jan 17, 2017
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Hiroshi Ohta
    • D14 - Recording, communication, or information retrieval equipment
  • Information Patent Grant

    Control unit for air compressor
    • Patent number D771783
    • Issue date Nov 15, 2016
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Hiroshi Ohta
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Air compressor
    • Patent number D753728
    • Issue date Apr 12, 2016
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Hiroshi Ohta
    • D15 - Machines not elsewhere specified
  • Information Patent Grant

    Screw compressor
    • Patent number 8,734,126
    • Issue date May 27, 2014
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Hitoshi Nishimura
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Air compressor of water injection type
    • Patent number 8,616,856
    • Issue date Dec 31, 2013
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Takehiro Matsuzaka
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor
    • Patent number 8,231,363
    • Issue date Jul 31, 2012
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Hitoshi Nishimura
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compressor in which low and high pressure stage compressor bo...
    • Patent number 8,221,094
    • Issue date Jul 17, 2012
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Hitoshi Nishimura
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Oil free screw compressor operating at variable speeds and control...
    • Patent number 6,739,841
    • Issue date May 25, 2004
    • Hitachi, Ltd.
    • Hitoshi Nishimura
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Oil free screw compressor operating at variable speeds and control...
    • Patent number 6,561,766
    • Issue date May 13, 2003
    • Hitachi, Ltd.
    • Hitoshi Nishimura
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Screw compression apparatus and operation control method thereof
    • Patent number 6,461,112
    • Issue date Oct 8, 2002
    • Hitachi, Ltd.
    • Hiroshi Ohta
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Apparatus for making diagnosis of valve device in turbine system
    • Patent number 4,523,286
    • Issue date Jun 11, 1985
    • Hitachi, Ltd.
    • Tsuguaki Koga
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES

Patents Applicationslast 30 patents

  • Information Patent Application

    Liquid-Cooled Compressor and Method for Operating Same
    • Publication number 20170130720
    • Publication date May 11, 2017
    • HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    • Shigeyuki YORIKANE
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Air Compressor
    • Publication number 20150361984
    • Publication date Dec 17, 2015
    • HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.
    • Hiroshi OHTA
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    SCREW COMPRESSOR
    • Publication number 20120251372
    • Publication date Oct 4, 2012
    • Hitoshi Nishimura
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Water-Cooled Oil-Free Air Compressor
    • Publication number 20100303658
    • Publication date Dec 2, 2010
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Yuji ITO
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Air Compressor of Water Injection Type
    • Publication number 20100233004
    • Publication date Sep 16, 2010
    • Hitachi Industrial Equipment Systems Co., Ltd.
    • Takehiro MATSUZAKA
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    SCREW COMPRESSOR
    • Publication number 20090123302
    • Publication date May 14, 2009
    • Hitoshi Nishimura
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Screw compressor
    • Publication number 20060280626
    • Publication date Dec 14, 2006
    • Hitoshi Nishimura
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Application

    Oil free screw compressor operating at variable speeds and control...
    • Publication number 20030180150
    • Publication date Sep 25, 2003
    • Hitoshi Nishimura
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Oil free screw compressor operating at variable speeds and control...
    • Publication number 20020051709
    • Publication date May 2, 2002
    • Hitoshi Nishimura
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...