Patents by Inventor Mutsuo Satoh

Mutsuo Satoh 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).

  • Fastening a magnetic disk to a hub structure
    Patent number: 7260886
    Abstract: Embodiments of the invention provide a clamping mechanism capable of clamping a magnetic disk by an accurate fastening force. In one embodiment, a magnetic disk fastening method includes the steps of: mounting a magnetic disk on a hub structure, setting a thin plate spring having a pressure-bearing part, a flexible part and a disk holding part at a predetermined position relative to the magnetic disk with the disk holding part in contact with a surface of the magnetic disk; pressing the pressure-bearing part by screwing a fastening screw in a threaded hole formed in the hub structure; measuring a deflection by which the flexible part is deflected in the pressure-bearing part pressing step; and stopping pressing the magnetic disk upon the increase of the deflection to a predetermined value.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: August 28, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yuhichiroh Matsunaga, Takashi Nishikawa, Mutsuo Satoh, Mitsuru Kitamura, Minoru Kamada
  • Magnetic disk drive producing method, magnetic disk fastening method and magnetic disk attaching method
    Publication number: 20060107520
    Abstract: Embodiments of the invention provide a clamping mechanism capable of clamping a magnetic disk by an accurate fastening force. In one embodiment, a magnetic disk fastening method includes the steps of: mounting a magnetic disk on a hub structure, setting a thin plate spring having a pressure-bearing part, a flexible part and a disk holding part at a predetermined position relative to the magnetic disk with the disk holding part in contact with a surface of the magnetic disk; pressing the pressure-bearing part by screwing a fastening screw in a threaded hole formed in the hub structure; measuring a deflection by which the flexible part is deflected in the pressure-bearing part pressing step; and stopping pressing the magnetic disk upon the increase of the deflection to a predetermined value.
    Type: Application
    Filed: November 14, 2005
    Publication date: May 25, 2006
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Yuhichiroh Matsunaga, Takashi Nishikawa, Mutsuo Satoh, Mitsuru Kitamura, Minoru Kamada