Patents by Inventor Yuuya Kusumoto

Yuuya Kusumoto 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).

  • Construction vehicle with controller for suppressing reduction of traction force under low speed traveling condition
    Patent number: 7987941
    Abstract: A construction vehicle includes an engine, a hydraulic pump driven by the engine, a travel hydraulic motor driven by pressure oil discharged from the hydraulic pump, travel wheels driven by the drive force of the travel hydraulic motor, and a controller. The controller is configured to control an engine speed, displacement of the hydraulic pump, and displacement of the travel hydraulic motor in order to control a vehicle speed and traction force. The controller is further configured to increase a maximum displacement of the travel hydraulic motor as the vehicle speed decreases within a low speed range in which the vehicle speed is equal to or less than a predetermined threshold.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: August 2, 2011
    Assignee: Komatsu Ltd.
    Inventors: Atsushi Shirao, Minoru Wada, Yuuya Kusumoto
  • CONSTRUCTION VEHICLE
    Publication number: 20100009806
    Abstract: A construction vehicle includes an engine, a hydraulic pump driven by the engine, a travel hydraulic motor driven by pressure oil discharged from the hydraulic pump, travel wheels driven by the drive force of the travel hydraulic motor, and a controller. The controller is configured to control an engine speed, displacement of the hydraulic pump, and displacement of the travel hydraulic motor in order to control a vehicle speed and the traction force. The controller is further configured to increase a maximum displacement of the travel hydraulic motor as the vehicle speed decreases within a low speed range in which the vehicle speed is equal to or less than a predetermined threshold.
    Type: Application
    Filed: August 28, 2007
    Publication date: January 14, 2010
    Applicant: Komatsu Ltd.
    Inventors: Atsushi Shirao, Minoru Wada, Yuuya Kusumoto