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Yusaku Nozawa

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  • Ibaraki-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Unloading valve
    • Patent number 6,681,794
    • Issue date Jan 27, 2004
    • Hitachi Construction Machinery Co., Ltd.
    • Mitsuhisa Tougasaki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Grant

    Hydraulic drive device of working machine
    • Patent number 6,453,585
    • Issue date Sep 24, 2002
    • Hitachi Construction Machinery Co., Ltd.
    • Kinya Takahashi
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic circuit device
    • Patent number 6,438,952
    • Issue date Aug 27, 2002
    • Hitachi Construction Machinery Co., Ltd.
    • Yusaku Nozawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Pump capacity control device and valve device
    • Patent number 6,422,009
    • Issue date Jul 23, 2002
    • Hitachi Construction Machinery Co., Ltd.
    • Yusaku Nozawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Control valve
    • Patent number 6,408,876
    • Issue date Jun 25, 2002
    • Hitachi Construction Machinery Co., Ltd.
    • Yoshizumi Nishimura
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydraulic circuit system
    • Patent number 6,378,302
    • Issue date Apr 30, 2002
    • Hitachi Construction Machinery Co., Ltd.
    • Yusaku Nozawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Directional control valve device
    • Patent number 6,327,959
    • Issue date Dec 11, 2001
    • Hitachi Construction Machinery
    • Kinya Takahashi
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • 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

    Pressure compensating valves
    • Patent number 6,135,149
    • Issue date Oct 24, 2000
    • Hitachi Construction Machinery Co., Ltd.
    • Yusaku Nozawa
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Directional control valve with flow distribution valves
    • Patent number 5,957,159
    • Issue date Sep 28, 1999
    • Hitachi Construction Machinery Co., Ltd.
    • Kinya Takahashi
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic control system
    • Patent number 5,921,165
    • Issue date Jul 13, 1999
    • Hitachi Construction Machinery Co., Ltd.
    • Kinya Takahashi
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic drive system
    • Patent number 5,485,724
    • Issue date Jan 23, 1996
    • Hitachi Construction Machinery Co., Ltd.
    • Yusaku Nozawa
    • 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

    Pressure compensating valve assembly
    • Patent number 5,333,449
    • Issue date Aug 2, 1994
    • Hitachi Construction Machinery Co., Ltd.
    • Kinya Takahashi
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Valve apparatus
    • Patent number 5,140,815
    • Issue date Aug 25, 1992
    • Hitachi Construction Machinery Co., Ltd.
    • Genroku Sugiyama
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Hydraulic driving apparatus
    • Patent number 5,083,430
    • Issue date Jan 28, 1992
    • Hitachi Construction Machinery Co., Ltd.
    • Toichi Hirata
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Flow control valves for hydraulic motor system
    • Patent number 4,945,723
    • Issue date Aug 7, 1990
    • Hitachi Construction Machinery Co., Ltd.
    • Eiki Izumi
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Pressure control valve
    • Patent number 4,942,900
    • Issue date Jul 24, 1990
    • Hitachi Construction Machinery Co., Ltd.
    • Yusaku Nozawa
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Flow control system for hydraulic motors
    • Patent number 4,938,022
    • Issue date Jul 3, 1990
    • Hitachi Construction Machinery Co., Ltd.
    • Toichi Hirata
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents

  • Information Patent Application

    Unloading valve
    • Publication number 20030102027
    • Publication date Jun 5, 2003
    • Mitsuhisa Tougasaki
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    HYDRAULIC DRIVE DEVICE OF WORKING MACHINE
    • Publication number 20020134078
    • Publication date Sep 26, 2002
    • Kinya Takahashi
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING