Patents by Inventor Toshihiko Kariya

Toshihiko Kariya 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).

  • Plasticating screw
    Patent number: 6206559
    Abstract: This invention relates to a plasticating screw suitable for use in an injection molding machine or an extruder. In the plasticating screw which is rotatable within a cylinder and has a mixing head (7) with plural groove portions (7a,7b) formed therein, recesses (2,3) in the shape of steps or slopes are formed on an outer peripheral surface (7d) of the mixing head (7) other than the groove portions (7a,7b) so that the recesses are in communication with the groove portions (7a,7b) located forward thereof as viewed in a direction of rotation.
    Type: Grant
    Filed: September 17, 1998
    Date of Patent: March 27, 2001
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kiyoshi Kinoshita, Tetuo Uwazi, Toshihiko Kariya
  • Hopper structure for feeding powdery materials
    Patent number: 6045348
    Abstract: The present invention is directed to a hopper structure for feeding a powdery material adapted to enable gas, etc., generated in a plasticizing cylinder to escape irrespective of the state of feed of the powdery material within a hopper.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: April 4, 2000
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kiyoshi Kinoshita, Toshihiko Kariya, Manabu Kawahara