Patents by Inventor Dan Onishi

Dan Onishi 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).

  • Press machine, control apparatus and control method of press machine
    Patent number: 8047131
    Abstract: A control apparatus of a press machine in which a motor performance torque is fluctuated in accordance with a rotational angle of the rotating body in the case of rotating the motor at a fixed instruction speed. The control apparatus includes an angle detecting apparatus detecting a rotational angle of the rotating body, a torque determining apparatus determining a necessary motor torque in correspondence to a characteristic of the press machine on the basis of a value of the rotational angle input from the angle detecting apparatus, and a speed adjusting apparatus increasing the rotational instruction speed of the motor to a value more than the fixed instruction speed, at the rotational angle of the rotating body in which the necessary motor torque becomes smaller than a predetermined motor torque reference value.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: November 1, 2011
    Assignee: IHI Corporation
    Inventors: Dan Onishi, Kazumichi Okajima
  • PRESS MACHINE, CONTROL APPARATUS AND CONTROL METHOD OF PRESS MACHINE
    Publication number: 20100170405
    Abstract: A control apparatus of a press machine in which a motor performance torque is fluctuated in accordance with a rotational angle of the rotating body in the case of rotating the motor at a fixed instruction speed. The control apparatus includes an angle detecting apparatus detecting a rotational angle of the rotating body, a torque determining apparatus determining a necessary motor torque in correspondence to a characteristic of the press machine on the basis of a value of the rotational angle input from the angle detecting apparatus, and a speed adjusting apparatus increasing the rotational instruction speed of the motor to a value more than the fixed instruction speed, at the rotational angle of the rotating body in which the necessary motor torque becomes smaller than a predetermined motor torque reference value.
    Type: Application
    Filed: March 26, 2007
    Publication date: July 8, 2010
    Applicant: IHI CORPORATION
    Inventors: Dan Onishi, Kazumichi Okajima