Patents by Inventor Kouichiro Hattori

Kouichiro Hattori 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).

  • Wire electrical discharge machining apparatus
    Patent number: 7038158
    Abstract: A wire cutting electric discharge machine has a high frequency voltage applying unit that applies a high frequency voltage and a direct current voltage applying unit applies a direct current voltage to the gap between the wire electrode and the workpiece. A detecting unit detects a low frequency component of a voltage occurring in the gap as a result of the electric discharge. The apparatus controls a feed rate based upon the state of the gap determined by the detecting unit.
    Type: Grant
    Filed: August 30, 2002
    Date of Patent: May 2, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akihiro Goto, Kouichiro Hattori, Kazushi Nakamura
  • Wire electrical discharge machining apparatus
    Publication number: 20050145603
    Abstract: A workpiece and a wire electrode are positioned near each other with a gap therebetween. A high-frequency voltage applying unit applies a high-frequency voltage and a direct current voltage applying unit applies a direct current voltage, to the workpiece and the wire electrode.
    Type: Application
    Filed: August 30, 2002
    Publication date: July 7, 2005
    Inventors: Akihiro Goto, Kouichiro Hattori, Kazushi Nakamura