Patents by Inventor Sakito Anpuku

Sakito Anpuku 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).

  • Runner vane for axial-flow hydraulic machinery
    Patent number: 8118558
    Abstract: A camber line in a radial section of a runner vane has a curved part extending near the tip of the runner vane is convex toward the front surface of the runner vane. The runner vane is formed in a shape meeting a condition expressed by: ?s<?p, where ?s is the radius of curvature of the back surface of the runner vane and ?p is the radius of curvature of the front surface of the runner vane. The runner vane of this shape suppresses flows toward the tip thereof to moderate the variation of flow velocity in the turning direction. Consequently, loss can be reduced without impeding the recover of pressure in a draft tube.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: February 21, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuyuki Nakamura, Norio Ohtake, Sakito Anpuku
  • RUNNER VANE FOR AXIAL-FLOW HYDRAULIC MACHINERY
    Publication number: 20090257879
    Abstract: A camber line in a radial section of a runner vane has a curved part extending near the tip of the runner vane is convex toward the front surface of the runner vane. The runner vane is formed in a shape meeting a condition expressed by: ?s<?p, where ?s is the radius of curvature of the back surface of the runner vane and ?p is the radius of curvature of the front surface of the runner vane. The runner vane of this shape suppresses flows toward the tip thereof to moderate the variation of flow velocity in the turning direction. Consequently, loss can be reduced without impeding the recover of pressure in a draft tube.
    Type: Application
    Filed: April 10, 2009
    Publication date: October 15, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kazuyuki Nakamura, Norio Ohtake, Sakito Anpuku