Patents by Inventor Atsushi Ohi

Atsushi Ohi 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).

  • Method and apparatus for non-consumable electrode type automatic arc welding
    Patent number: 3989921
    Abstract: A method and an apparatus for non-consumable electrode type automatic arc welding in which the length of an arc produced between a non-consumable electrode and a workpiece which is being welded, is automatically controlled to an optimum value by means of an electric drive motor for driving an electrode according to a signal obtained by proportionally integrating or multiplying the voltage difference between the arc voltage detected by using an integrating element and the set reference voltage.
    Type: Grant
    Filed: March 28, 1974
    Date of Patent: November 2, 1976
    Assignee: Kobe Steel Ltd.
    Inventors: Atsushi Ohi, Toshio Arai, Akihiko Ihochi, Hironosuke Kada, Teruyoshi Sekino, Kenichi Akahori