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Chiharu Umetsu

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  • Yokohama-shi, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Accumulator having a safety valve
    • Patent number 6,810,915
    • Issue date Nov 2, 2004
    • NHK Spring Co., Ltd.
    • Chiharu Umetsu
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Accumulator
    • Patent number 6,789,576
    • Issue date Sep 14, 2004
    • NHK Spring Co., Ltd.
    • Chiharu Umetsu
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Accumulator and manufacturing process thereof
    • Patent number 6,525,290
    • Issue date Feb 25, 2003
    • NHK Spring Co., Ltd.
    • Takeyoshi Shimbori
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Accumulator and manufacturing process thereof
    • Patent number 6,286,552
    • Issue date Sep 11, 2001
    • NHK Spring Co., Ltd.
    • Takeyoshi Shimbori
    • B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Die spring apparatus
    • Patent number 5,098,071
    • Issue date Mar 24, 1992
    • NHK Spring Co., Ltd.
    • Chiharu Umetsu
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Grant

    Die cushion for applying pressure to a press machine via gas pressu...
    • Patent number 5,027,637
    • Issue date Jul 2, 1991
    • NHK Spring Co., Ltd.
    • Chiharu Umetsu
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Accumulator
    • Patent number 4,858,898
    • Issue date Aug 22, 1989
    • NHK Spring Co., Ltd.
    • Yoshiharu Niikura
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Coated coil spring
    • Patent number 4,763,882
    • Issue date Aug 16, 1988
    • NHK Spring Co., Ltd.
    • Masakazu Nishiyama
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Laminated metallic belt for torque transmission device and method o...
    • Patent number 4,698,050
    • Issue date Oct 6, 1987
    • Honda Giken Kogyo, K.K.
    • Torao Hattori
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

  • Information Patent Application

    Accumulator having a safety valve
    • Publication number 20030116209
    • Publication date Jun 26, 2003
    • NHK SPRING CO., LTD
    • Chiharu Umetsu
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    Accumulator
    • Publication number 20020020758
    • Publication date Feb 21, 2002
    • Chiharu Umetsu
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    Accumulator and manufacturing process thereof
    • Publication number 20010037834
    • Publication date Nov 8, 2001
    • NHK SPRING CO., LTD
    • Takeyoshi Shimbori
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC