Patents by Inventor Sachio Obara

Sachio Obara 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).

  • Retarder controlling device and method
    Patent number: 7672771
    Abstract: There is provided a retarder control device which is simple in constitution and can reliably apply braking. An engine rotational speed detector detects an engine rotational speed, gear step detection means detects a gear step of a transmission, an accelerator operation detector detects the operated state of an accelerator, and a retarder controller previously stores automatic braking amount determination data representing the relation between the engine rotational speed and the automatic braking amount of a retarder corresponding to each gear step of the transmission and controls the retarder according to the automatic braking amount of the retarder calculated from the automatic braking amount determination data based on the detected engine rotational speed and gear step of the transmission when the accelerator is judged to be off from the detected operated state of the accelerator.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: March 2, 2010
    Assignee: Komatsu Ltd.
    Inventors: Hitoshi Nakanishi, Sachio Obara, Satoshi Sawafuji
  • Retarder Controlling Device and Method
    Publication number: 20080071453
    Abstract: There is provided a retarder control device which is simple in constitution and can reliably apply braking. An engine rotational speed detector detects an engine rotational speed, gear step detection means detects a gear step of a transmission, an accelerator operation detector detects the operated state of an accelerator, and a retarder controller previously stores automatic braking amount determination data representing the relation between the engine rotational speed and the automatic braking amount of a retarder corresponding to each gear step of the transmission and controls the retarder according to the automatic braking amount of the retarder calculated from the automatic braking amount determination data based on the detected engine rotational speed and gear step of the transmission when the accelerator is judged to be off from the detected operated state of the accelerator.
    Type: Application
    Filed: January 17, 2006
    Publication date: March 20, 2008
    Applicant: KOMATSU LTD.
    Inventors: Hitoshi Nakanishi, Sachio Obara, Satoshi Sawafuji