Patents by Inventor Toshikatsu Danura

Toshikatsu Danura 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).

  • Projection welding apparatus, projection welding method and projection welding structure
    Patent number: 9205510
    Abstract: A projection welding apparatus comprising a first electrode; a second electrode, a first and a second plate members to be welded are provided between the first and second electrodes, the second plate member includes a facing portion and an extension portion extending from the facing portion towards the first plate member and an end face of the extension portion abuts with welding projections provided on the first plate member; a pressing unit causing the second electrode to approach the first electrode, and presses the end face of the extension portion against the welding projections via the second electrode; a voltage application unit causing current to flow in the both plate members; and a stopper member, disposed between the first electrode and the facing portion, is contacted against the facing portion, and electrically connects the facing portion and the first electrode so as to bypass the first plate member.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 8, 2015
    Assignee: NHK SPRING CO., LTD.
    Inventors: Toshihiro Nakane, Toshikatsu Danura, Keishirou Kuroda
  • PROJECTION WELDING APPARATUS, PROJECTION WELDING METHOD AND PROJECTION WELDING STRUCTURE
    Publication number: 20120270061
    Abstract: A projection welding apparatus comprising a first electrode; a second electrode, a first and a second plate members to be welded are provided between the first and second electrodes, the second plate member includes a facing portion and an extension portion extending from the facing portion towards the first plate member and an end face of the extension portion abuts with welding projections provided on the first plate member; a pressing unit causing the second electrode to approach the first electrode, and presses the end face of the extension portion against the welding projections via the second electrode; a voltage application unit causing current to flow in the both plate members; and a stopper member, disposed between the first electrode and the facing portion, is contacted against the facing portion, and electrically connects the facing portion and the first electrode so as to bypass the first plate member.
    Type: Application
    Filed: April 18, 2012
    Publication date: October 25, 2012
    Applicant: NHK SPRING CO., LTD.
    Inventors: Toshihiro Nakane, Toshikatsu Danura, Keishirou Kuroda