Patents by Inventor Wataru Kondou

Wataru Kondou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Traveling control apparatus for hydraulic traveling vehicle
    Patent number: 8322481
    Abstract: A rotational speed pickup 71 (traveling speed detection means), a hydraulic pressure sensor 72 (traveling operation detection means), a hydraulic pressure sensor 73 (drive status detection means), and a voltage sensor 74 (transmission shift position detection means) detect parameters regarding the traveling state of a hydraulic traveling vehicle. A control unit 80, a solenoid proportional valve 81, an engine control system 82, and a motor regulator 33 determine the operating state of the hydraulic traveling vehicle based on the parameters regarding the traveling state, and control the equivalent displacement of the traveling system including a hydraulic traveling motor 14 and the maximum flow rate supplied to the hydraulic traveling motor 14 according to the result of determination. The pump flow rate and motor displacement are controlled according to the traveling state in this way, thereby ensuring favorable traveling performance without degrading the fuel efficiency.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: December 4, 2012
    Assignee: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hidetoshi Satake, Katsuaki Kodaka, Yuuki Gotou, Kazuhiro Ichimura, Wataru Kondou
  • TRAVELING CONTROL APPARATUS FOR HYDRAULIC TRAVELING VEHICLE
    Publication number: 20090238696
    Abstract: A rotational speed pickup 71 (traveling speed detection means), a hydraulic pressure sensor 72 (traveling operation detection means), a hydraulic pressure sensor 73 (drive status detection means), and a voltage sensor 74 (transmission shift position detection means) detect parameters regarding the traveling state of a hydraulic traveling vehicle. A control unit 80, a solenoid proportional valve 81, an engine control system 82, and a motor regulator 33 determine the operating state of the hydraulic traveling vehicle based on the parameters regarding the traveling state, and control the equivalent displacement of the traveling system including a hydraulic traveling motor 14 and the maximum flow rate supplied to the hydraulic traveling motor 14 according to the result of determination. The pump flow rate and motor displacement are controlled according to the traveling state in this way, thereby ensuring favorable traveling performance without degrading the fuel efficiency.
    Type: Application
    Filed: December 27, 2007
    Publication date: September 24, 2009
    Applicant: Hitachi Construction Machinery Co., Ltd.
    Inventors: Hidetoshi Satake, Katsuaki Kodaka, Yuuki Gotou, Kazuhiro Ichimura, Wataru Kondou