Patents by Inventor Madoka Fujii

Madoka Fujii 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).

  • Superconducting magnetic thrust bearing with integrated dynamotor
    Patent number: 7948131
    Abstract: In a superconducting magnetic thrust bearing with integrated dynamotor, a first fixed core is formed to have a U-shaped cross-section in a direction of the central axis of the cylindrical shape with an opening of the U-shape being directed perpendicularly to the central axis, and a superconducting coil is arranged on the inside of the U-shaped portion of the first fixed core formed into the U-shape. A rotary core has projecting ends at positions opposite to two projecting ends of the U-shape of the first fixed core, and a magnetic flux guide path, at a position opposite to an armature core, with a shape varying at predetermined intervals in the winding direction of the superconducting coil. The rotary core is constituted such that it rotates relatively to the first fixed core and is able to move in the direction of the central axis of the first fixed core.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: May 24, 2011
    Assignee: Central Japan Railway Company
    Inventors: Hiroshi Nakashima, Michiaki Kubota, Hideyuki Yamada, Kazunori Kikukawa, Madoka Fujii
  • SUPERCONDUCTING MAGNETIC THRUST BEARING WITH INTEGRATED DYNAMOTOR
    Publication number: 20100026121
    Abstract: In a superconducting magnetic thrust bearing with integrated dynamotor, a first fixed core is formed to have a U-shaped cross-section in a direction of the central axis of the cylindrical shape with an opening of the U-shape being directed perpendicularly to the central axis, and a superconducting coil is arranged on the inside of the U-shaped portion of the first fixed core formed into the U-shape. A rotary core has projecting ends at positions opposite to two projecting ends of the U-shape of the first fixed core, and a magnetic flux guide path, at a position opposite to an armature core, with a shape varying at predetermined intervals in the winding direction of the superconducting coil. The rotary core is constituted such that it rotates relatively to the first fixed core and is able to move in the direction of the central axis of the first fixed core.
    Type: Application
    Filed: December 21, 2007
    Publication date: February 4, 2010
    Applicant: CENTRAL JAPAN RAILWAY COMPANY
    Inventors: Hiroshi Nakashima, Michiaki Kubota, Hideyuki Yamada, Kazunori Kikukawa, Madoka Fujii