Patents by Inventor Yuji Ishibashi

Yuji Ishibashi 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).

  • Traveling wire electric discharge machining apparatus capable of workpiece location determining and energy level adjustment
    Patent number: 5573681
    Abstract: A traveling wire electric discharge machining apparatus machines a workpiece by applying periodic voltage pulses to a wire electrode while moving the wire electrode relative to the workpiece. A location on the workpiece is determined, according to a predetermined parameter. The location is before a change in machining direction of the workpiece. When the wire electrode is positioned at the determined location, a characteristic of the periodic voltage pulse is changed.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: November 12, 1996
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Yuji Ishibashi, Masayuki Iwai
  • Wire electric discharge machine having alterable discharge period
    Patent number: 5362936
    Abstract: A discharge frequency per unit time between a wire electrode and a workpiece is detected, and the thickness of the workpiece is estimated on the basis of the discharge frequency, the relative moving speed between the wire electrode and the workpiece and the information on the shape of the workpiece. Thereafter, the optimum discharge period is calculated on the basis of the estimated thickness of the workpiece and the set processing conditions to perform the processing of the workpiece.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: November 8, 1994
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Yuji Ishibashi, Akihiro Komori