Patents by Inventor Jean Dupraz

Jean Dupraz 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 with preset electrode feed
    Patent number: 4049942
    Abstract: In electrical discharge machining, an electrode is displaced towards a workpiece at a rate controlled as a function of the sparking conditions. The relative position of the electrode and workpiece is measured and, beyond a preset reference relative position, advance of the electrode is slowed as a function of the displacement past the reference position, or is stopped at the reference position, while continuing sparking and allowing withdrawal of the electrode if necessitated by the sparking conditions.
    Type: Grant
    Filed: March 19, 1976
    Date of Patent: September 20, 1977
    Assignee: Ateliers des Charmilles S.A.
    Inventors: Francois Balleys, Jean Dupraz
  • Electric discharge machining method and device with preset electrode
    Patent number: RE31494
    Abstract: In electrical discharge machining, an electrode is displaced towards a workpiece at a rate controlled as a function of the sparking conditions. The relative position of the electrode and workpiece is measured and, beyond a preset .[.reference.]. relative position, advance of the electrode is slowed as a function of the displacement past the reference position, or is stopped at the reference position, while continuing sparking and allowing withdrawal of the electrode if necessitated by the sparking conditions.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: January 10, 1984
    Assignee: Ateliers des Charmilles, S.A.
    Inventors: Francois Balleys, Jean Dupraz