Patents by Inventor Tadaomi Hirotsu

Tadaomi Hirotsu 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).

  • Pattern for castings and the castings produced therefrom
    Patent number: 5166005
    Abstract: The present invention relates to a pattern for castings and the castings produced from the pattern. The pattern comprises a pattern plate including a parting plane, at least one multistage draft and at least one substantial draft extending from the parting plane. A casting having a suitable draft includes corner portions formed by the parting plane.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: November 24, 1992
    Assignee: Hitachi Metals, Ltd.
    Inventors: Masahito Goka, Tadaomi Hirotsu
  • Pattern for castings and the castings produced therefrom
    Patent number: 5070929
    Abstract: The present invention relates to a pattern for castings and the castings produced from the pattern. The pattern comprises a pattern plate including a parting plane, at least one multistage draft and at least one substantial draft extending from the parting plane. A casting having a suitable draft includes corner portions formed by the parting plane.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: December 10, 1991
    Assignee: Hitachi Metals, Ltd.
    Inventors: Masahito Goka, Tadaomi Hirotsu