Patents by Inventor Noboru Kakizawa

Noboru Kakizawa 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).

  • Press forging method
    Patent number: 8047042
    Abstract: The present invention is a press forging method by which porosities in a raw material are removed and mechanical properties such as ductility and toughness of a steel product are at a required level in a case that a steel ingot is treated as a raw material in press forging. A cylindrical steel ingot (a so-called “round billet”) is set onto a die as a raw material, and, a forging process is applied to the steel ingot so that buckling of the steel is not generated during the forging process and that a reduction ratio and a forging ratio are more than predetermined values, respectively.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: November 1, 2011
    Assignee: Topy Kogyo Kabushiki Kaisha
    Inventors: Toshihiko Sato, Yugo Takeuchi, Yasuo Yoshida, Noboru Kakizawa, Takehiro Osugi, Takanori Yoshikawa
  • Press forging method
    Publication number: 20080141752
    Abstract: The present invention is a press forging method by which porosities in a raw material are removed and mechanical properties such as ductility and toughness of a steel product are at a required level in a case that a steel ingot is treated as a raw material in press forging. A cylindrical steel ingot (a so-called “round billet”) is set onto a die as a raw material, and, a forging process is applied to the steel ingot so that buckling of the steel is not generated during the forging process and that a reduction ratio and a forging ratio are more than predetermined values, respectively.
    Type: Application
    Filed: November 28, 2007
    Publication date: June 19, 2008
    Inventors: Toshihiko Sato, Yugo Takeuchi, Yasuo Yoshida, Noboru Kakizawa, Takehiro Osugi, Takanori Yoshikawa