Patents by Inventor Masao Enzaka

Masao Enzaka 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).

  • Friction stir welding method and its device
    Patent number: 8181843
    Abstract: In a friction stir welding method, a tool is moved being rotated along portions to be joined of a work piece, where the portions include a corner with a smaller curvature that connect two portions with larger curvatures. The method includes the steps of setting the work piece on a supporting member, rotating the tool around a center axis thereof, moving the tool toward the work piece to penetrate a portion of the tool into the work piece at the portions to be joined, and moving and turning the tool along the portions to be joined. A rotation speed of the tool around the center axis thereof is decreased to be smaller at the corner with the smaller curvature than the rotation speed of the tool around the center axis thereof at the portions with the larger curvatures.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: May 22, 2012
    Assignee: Calsonic Kansei Corporation
    Inventors: Masao Enzaka, Hiroyuki Hakaridani, Soichiro Yamamoto
  • FRICTION STIR WELDING METHOD AND ITS DEVICE
    Publication number: 20120118937
    Abstract: In a friction stir welding method, a tool is moved being rotated along portions to be joined of a work piece, where the portions include a corner with a smaller curvature that connect two portions with larger curvatures. The method includes the steps of setting the work piece on a supporting member, rotating the tool around a center axis thereof, moving the tool toward the work piece to penetrate a portion of the tool into the work piece at the portions to be joined, and moving and turning the tool along the portions to be joined. A rotation speed of the tool around the center axis thereof is decreased to be smaller at the corner with the smaller curvature than the rotation speed of the tool around the center axis thereof at the portions with the larger curvatures.
    Type: Application
    Filed: October 25, 2011
    Publication date: May 17, 2012
    Inventors: Masao ENZAKA, Hiroyuki Hakaridani, Soichiro Yamamoto