Patents by Inventor Kooji Akamatsu

Kooji Akamatsu 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).

  • Electric discharge machining method and device
    Patent number: 4945199
    Abstract: An electric discharge machining device, in which a pulse voltage is repeatedly applied between electrodes, which are an electrode and a workpiece to be machined, to cause electric discharge between the electrodes and thereby machine the workpiece. The electric discharge machining device includes a switching device (4) connected between a power source and the machining section, for controlling energy supplied by the power source; interelectrode impedance detecting apparatus (10) for detecting an interelectrode impedance affected by the variation in place of electric discharge which takes place between the electrodes; discharge detecting apparatus for detecting when electric discharge takes place between the electrodes; and a control device (18).
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: July 31, 1990
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshiaki Tanaka, Morihisa Nishikawa, Yoshio Ozaki, Kooji Akamatsu, Masahiro Nakata, Atsushi Taneda