Patents by Inventor Kouichirou YASUDA

Kouichirou YASUDA 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).

  • Electrical discharge machine and method for manufacturing machined object using the same
    Patent number: 9802263
    Abstract: In an electrical discharge machine that applies a voltage between an electrode and a workpiece to generate electrical discharge, an electrode holder holds the electrode. An ultrasonic motor has a fingertip that comes into contact with electrode holder, and moves electrode holder in a driving direction by moving the fingertip in an annular manner at an ultrasonic-range frequency. A roller bearing guides the movement of the electrode holder in the driving direction. A control circuit controls a position of the electrode in the driving direction by driving the ultrasonic motor, and moves the electrode holder based on an abnormality occurring in resistance against the movement of the electrode holder in the driving direction such that the electrode holder is moved by a movement distance equivalent to when the largest roller element among a plurality of roller elements of the roller bearing rolls and rotates once without sliding or longer.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: October 31, 2017
    Assignee: DENSO CORPORATION
    Inventors: Kouichirou Yasuda, Yasuji Inobe, Akira Itoh, Nobuhiko Nagai, Tetsuji Yamaguchi, Hiroyuki Ootani
  • ELECTRICAL DISCHARGE MACHINE AND METHOD FOR MANUFACTURING MACHINED OBJECT USING THE SAME
    Publication number: 20150246402
    Abstract: In an electrical discharge machine that applies a voltage between an electrode and a workpiece to generate electrical discharge, an electrode holder holds the electrode. An ultrasonic motor has a fingertip that comes into contact with electrode holder, and moves electrode holder in a driving direction by moving the fingertip in an annular manner at an ultrasonic-range frequency. A roller bearing guides the movement of the electrode holder in the driving direction. A control circuit controls a position of the electrode in the driving direction by driving the ultrasonic motor, and moves the electrode holder based on an abnormality occurring in resistance against the movement of the electrode holder in the driving direction such that the electrode holder is moved by a movement distance equivalent to when the largest roller element among a plurality of roller elements of the roller bearing rolls and rotates once without sliding or longer.
    Type: Application
    Filed: March 2, 2015
    Publication date: September 3, 2015
    Inventors: Kouichirou YASUDA, Yasuji INOBE, Akira ITOH, Nobuhiko NAGAI, Tetsuji YAMAGUCHI, Hiroyuki OOTANI