Patents by Inventor Yoshitsuga Fukukawa

Yoshitsuga Fukukawa 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).

  • Apparatus for treating ends of large-diameter welded pipe
    Patent number: 4729502
    Abstract: A large-diameter welded steel pipe having a straight seam and tab plates attached to its ends as extensions of the seam is laid along a setting line with the seam upward. An apparatus for treating the ends of such a pipe has a tab plate cutting unit and a bead removing unit. The tab plate cutting unit cuts the tab plates off with a torch. The bead removing unit removes the weld beads on the inner surface of the ends of the pipe by cutting them with a rotary cutter.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: March 8, 1988
    Assignees: Sumitomo Metal Industries, Ltd., Kashiwara Machine Manufacturing Co., Ltd.
    Inventors: Yoshitsuga Fukukawa, Atsushi Nishida, Mamoru Nishioka, Akio Takemori