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Masami Ochiai

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  • Tsuchiura-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Swing drive system for construction machine
    • Patent number 7,979,182
    • Issue date Jul 12, 2011
    • Hitachi Construction Machinery Co., Ltd.
    • Takatoshi Ooki
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic driving system of construction machinery
    • Patent number 7,500,360
    • Issue date Mar 10, 2009
    • Hitachi Constuction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Control valve apparatus and pressure circuit
    • Patent number 7,175,155
    • Issue date Feb 13, 2007
    • Hitachi Construction Machinery Co., Ltd.
    • Kazuo Takiguchi
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Pump trouble diagnosing device for hydraulic drive device and displ...
    • Patent number 6,823,289
    • Issue date Nov 23, 2004
    • Hitachi Construction Machinery Co., Ltd.
    • Hirotsugu Kasuya
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Overwinding prevention device for winch
    • Patent number 6,644,629
    • Issue date Nov 11, 2003
    • Hitachi Construction Machinery Co., Ltd.
    • Shinobu Higashi
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Swivel control apparatus
    • Patent number 6,339,929
    • Issue date Jan 22, 2002
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Hydraulique drive device
    • Patent number 6,244,048
    • Issue date Jun 12, 2001
    • Hitachi Construction Machinery Co., Ltd.
    • Sotaro Tanaka
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Apparatus for diagnosing failure of hydraulic pump for work machine
    • Patent number 6,055,851
    • Issue date May 2, 2000
    • Hitachi Construction Machinery Co., Ltd.
    • Yasuo Tanaka
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic drive system
    • Patent number 5,873,245
    • Issue date Feb 23, 1999
    • Hitachi Construction Machinery Co., Ltd.
    • Hideyo Kato
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Flow control system
    • Patent number 5,460,001
    • Issue date Oct 24, 1995
    • Hitachi Construction Machinery Co., Ltd.
    • Hideyo Kato
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic recovery device
    • Patent number 5,442,912
    • Issue date Aug 22, 1995
    • Hitachi Construction Machinery Co., Ltd.
    • Toichi Hirata
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic control valve apparatus and hydraulic drive system
    • Patent number 5,433,076
    • Issue date Jul 18, 1995
    • Hitachi Construction Machinery Co., Ltd.
    • Genroku Sugiyama
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic drive system for hydraulic working machines
    • Patent number 5,421,155
    • Issue date Jun 6, 1995
    • Hitachi Construction Machinery Co., Ltd.
    • Toichi Hirata
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic drive system for construction machine
    • Patent number 5,392,539
    • Issue date Feb 28, 1995
    • Hitachi Construction Machinery Co., Ltd.
    • Toichi Hirata
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic drive system and valve apparatus
    • Patent number 5,251,444
    • Issue date Oct 12, 1993
    • Hitachi Construction Machinery Co., Ltd.
    • Masami Ochiai
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Safety device for hydraulic closed circuit
    • Patent number 5,048,294
    • Issue date Sep 17, 1991
    • Hitachi Construction Machinery Co., Ltd.
    • Morio Oshina
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydraulic drive system
    • Patent number 5,003,776
    • Issue date Apr 2, 1991
    • Hitachi Construction Machinery Co., Ltd.
    • Takashi Kanai
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Solenoid operated valve apparatus
    • Patent number 4,919,390
    • Issue date Apr 24, 1990
    • Hitachi Construction Machinery Co., Ltd.
    • Ken Ichiryu
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Hydraulic drive circuit system
    • Patent number 4,846,046
    • Issue date Jul 11, 1989
    • Hitachi Construction Machinery Co., Ltd.
    • Takashi Kanai
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Flow control valve apparatus
    • Patent number 4,813,447
    • Issue date Mar 21, 1989
    • Hitachi Construction Machinery Co., Ltd.
    • Ken Ichiryu
    • G05 - CONTROLLING REGULATING

Patents Applicationslast 30 patents