Patents by Inventor Yusuke TOMATSU

Yusuke TOMATSU 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).

  • Hydraulic system for working machine and control method of the hydraulic system
    Patent number: 11713557
    Abstract: A hydraulic system includes: a boom cylinder to move a boom; a working tool cylinder to move a working tool attached to the boom; a boom control valve to control the boom cylinder; a working tool control valve to control the working tool cylinder; a horizontal control valve having: an activating position to allow a horizontalizing operation of the working tool; and a stopping position to stop the horizontalizing operation; and a controller device having: a first information obtaining portion to obtain permission and non-permission to the horizontalizing operation; a second information obtaining portion to obtain at least one of upward operation and upward movement of the boom; and a horizontal controller to set the horizontal control valve to the stopping position when the first information obtaining portion obtains the non-permission and the second information obtaining portion obtains one of the upward operation and the upward movement.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: August 1, 2023
    Assignee: KUBOTA CORPORATION
    Inventors: Yuji Fukuda, Yusuke Tomatsu
  • HYDRAULIC SYSTEM FOR WORKING MACHINE AND CONTROL METHOD OF THE HYDRAULIC SYSTEM
    Publication number: 20210025126
    Abstract: A hydraulic system includes: a boom cylinder to move a boom; a working tool cylinder to move a working tool attached to the boom; a boom control valve to control the boom cylinder; a working tool control valve to control the working tool cylinder; a horizontal control valve having: an activating position to allow a horizontalizing operation of the working tool; and a stopping position to stop the horizontalizing operation; and a controller device having: a first information obtaining portion to obtain permission and non-permission to the horizontalizing operation; a second information obtaining portion to obtain at least one of upward operation and upward movement of the boom; and a horizontal controller to set the horizontal control valve to the stopping position when the first information obtaining portion obtains the non-permission and the second information obtaining portion obtains one of the upward operation and the upward movement.
    Type: Application
    Filed: June 15, 2020
    Publication date: January 28, 2021
    Applicant: KUBOTA CORPORATION
    Inventors: Yuji FUKUDA, Yusuke TOMATSU