Patents by Inventor Makito Yahata

Makito Yahata 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).

  • Work vehicle and work vehicle control method
    Patent number: 8977444
    Abstract: A work vehicle includes an engine, a travel device, a hydraulic pump, a work implement, a torque converter device, and a controller. The torque converter includes a torque converter and a lockup clutch. The controller is configured to switch the lockup clutch between a connected state and a non-connected state in accordance with a travel state of the work vehicle. The controller is configured to determine whether load increase conditions associated with an increase in load on the work implement are satisfied, and to control the lockup clutch so that the lockup clutch is in the non-connected state when the load increase conditions are satisfied.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: March 10, 2015
    Assignee: Komatsu Ltd.
    Inventors: Satoshi Fukuhara, Makito Yahata, Yukihiro Nakanishi
  • WORK VEHICLE AND WORK VEHICLE CONTROL METHOD
    Publication number: 20120310493
    Abstract: A work vehicle includes an engine, a travel device, a hydraulic pump, a work implement, a torque converter device, and a controller. The torque converter includes a torque converter and a lockup clutch. The controller is configured to switch the lockup clutch between a connected state and a non-connected state in accordance with a travel state of the work vehicle. The controller is configured to determine whether load increase conditions associated with an increase in load on the work implement are satisfied, and to control the lockup clutch so that the lockup clutch is in the non-connected state when the load increase conditions are satisfied.
    Type: Application
    Filed: January 31, 2011
    Publication date: December 6, 2012
    Applicant: KOMATSU LTD.
    Inventors: Satoshi Fukuhara, Makito Yahata, Yukihiro Nakanishi