Patents by Inventor Haruyuki Kurihara

Haruyuki Kurihara 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).

  • Data storage apparatus and disk fixing method for preventing the deformation of disks by regulating where the storage apparatus is fixed to the disk
    Patent number: 5490022
    Abstract: A disk drive apparatus comprises a disk for recording data and a drive motor for rotating the disk. The disk has obverse and reverse sides, a center hole, an unlevel portion with an uneven flatness on the obverse and reverse sides, situated around the center hole, and a level portion situated outside the unlevel portion and having level surfaces on the obverse and reverse sides. The disk is mounted on a hub of the motor such that the hub is passed through the center hole. The hub has at its one end a supporting portion facing the level portion of the disk. A disk retainer, having a press portion facing the level portion of the disk, is attached to the other end of the hub so as to press the disk toward the supporting portion.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: February 6, 1996
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shigeru Hoshina, Nobuyuki Tanaka, Haruyuki Kurihara, Kiyoji Kikuchi