Patents by Inventor Sumitoshi Mai

Sumitoshi Mai 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).

  • Chill plate and stacked mold
    Patent number: 5904203
    Abstract: A compact stacked mold is provided by reducing the sand-metal ratio. Cavities (11, 12) are formed on upper and lower sides (13, 14) of a chill plate (10) corresponding to one half of a cam profile, and the upper and lower sides (13, 14) are aligned with parting surfaces of a mold (15).
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: May 18, 1999
    Assignees: Kabushiki Kaisha Riken, Riken Castec Corporation
    Inventor: Sumitoshi Mai
  • Chill plate and stacked mold
    Patent number: 5836374
    Abstract: Chill plates are integrated into a cassette to save the time which has been required to rearrange chill plates scattered at the time of output of castings. Each chill plate 1 is formed, on four corners thereof, with cavities 4 and 7 each corresponding to a quarter of a member to be chilled and with a center hole 9 through which a fixed shaft 7 is inserted in the center thereof.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: November 17, 1998
    Assignees: Kabushiki Kaisha Riken, Riken Castec Corporation
    Inventor: Sumitoshi Mai
  • Stacked mold
    Patent number: 5778965
    Abstract: The sand-metal ratio of a mold used for casting a crank shaft or cam shaft having discrete shapes is reduced to make the mold more compact. Basic discrete cavities (15) including cavities (6) corresponding to one half of shaft portions and cavities (7) corresponding to one half of cam portions are staggered by axially offsetting them in horizontal and/or vertical direction.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: July 14, 1998
    Assignees: Kabushiki Kaisha Riken, Riken Castec Corporation
    Inventor: Sumitoshi Mai