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Tsutomu Udagawa

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  • Ibaraki-ken, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulic work machine
    • Patent number 11,274,418
    • Issue date Mar 15, 2022
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic control system for working machine
    • Patent number 10,400,797
    • Issue date Sep 3, 2019
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic control system for work machine
    • Patent number 10,330,128
    • Issue date Jun 25, 2019
    • Hitachi Construction Machinery Co., Ltd.
    • Hidekazu Moriki
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Hydraulic control device for work machine
    • Patent number 10,060,450
    • Issue date Aug 28, 2018
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Hydraulic closed circuit system
    • Patent number 9,695,841
    • Issue date Jul 4, 2017
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Grant

    Work machine
    • Patent number 9,212,469
    • Issue date Dec 15, 2015
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Rotation control device of working machine
    • Patent number 9,103,093
    • Issue date Aug 11, 2015
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Rotation control device for working machine
    • Patent number 8,818,649
    • Issue date Aug 26, 2014
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    Travel control device for work vehicle and work vehicle
    • Patent number 8,585,156
    • Issue date Nov 19, 2013
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Travel drive system for work vehicle, work vehicle, and travel driv...
    • Patent number 8,146,691
    • Issue date Apr 3, 2012
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    HST travel system for working machine
    • Patent number 7,712,565
    • Issue date May 11, 2010
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • B60 - VEHICLES 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

    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

Patents Applicationslast 30 patents

  • Information Patent Application

    Construction Machine
    • Publication number 20220298755
    • Publication date Sep 22, 2022
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu UDAGAWA
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    CONSTRUCTION MACHINE
    • Publication number 20210301502
    • Publication date Sep 30, 2021
    • Tsutomu UDAGAWA
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Hydraulic Work Machine
    • Publication number 20200018043
    • Publication date Jan 16, 2020
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu UDAGAWA
    • F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
  • Information Patent Application

    Hydraulic Control System for Working Machine
    • Publication number 20180073525
    • Publication date Mar 15, 2018
    • HITACHI CONSTRUCTION MACHINERY CO., LTD.
    • Tsutomu UDAGAWA
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    HYDRAULIC CONTROL SYSTEM FOR WORK MACHINE
    • Publication number 20170268540
    • Publication date Sep 21, 2017
    • Hitachi Construction Machinery Co., Ltd.
    • Hidekazu MORIKI
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Hydraulic Control Device for Work Machine
    • Publication number 20150300378
    • Publication date Oct 22, 2015
    • HITACHI CONSTRUCTION MACHINERY CO., LTD.
    • Tsutomu Udagawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    HYDRAULIC CLOSED CIRCUIT SYSTEM
    • Publication number 20150107236
    • Publication date Apr 23, 2015
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    WORK MACHINE
    • Publication number 20140371995
    • Publication date Dec 18, 2014
    • Tsutomu Udagawa
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    TRAVEL CONTROL DEVICE FOR WORK VEHICLE AND WORK VEHICLE
    • Publication number 20140033699
    • Publication date Feb 6, 2014
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    Rotation Control Device of Working Machine
    • Publication number 20140032059
    • Publication date Jan 30, 2014
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Rotation Control Device for Working Machine
    • Publication number 20120101696
    • Publication date Apr 26, 2012
    • Hitachi Construction Machinery Co., Ltd.
    • Tsutomu Udagawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Application

    Travel Drive System for Work Vehicle, Work Vehicle, and Travel Driv...
    • Publication number 20100032219
    • Publication date Feb 11, 2010
    • HITACHI CONSTRUCTION MACHINERY CO., LTD.
    • Tsutomu Udagawa
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    Travel Control Device for Work Vehicle and Work Vehicle
    • Publication number 20090127928
    • Publication date May 21, 2009
    • Tsutomu Udagawa
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    Hst Travel System for Working Machine
    • Publication number 20070235241
    • Publication date Oct 11, 2007
    • Tsutomu Udagawa
    • B60 - VEHICLES IN GENERAL
  • Information Patent Application

    Control valve apparatus and pressure circuit
    • Publication number 20050242310
    • Publication date Nov 3, 2005
    • Kazuo Takiguchi
    • F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
  • Information Patent Application

    Hydraulic driving system of construction machinery
    • Publication number 20050175485
    • Publication date Aug 11, 2005
    • Tsutomu Udagawa
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING