Patents by Inventor Kezuo Matsui

Kezuo Matsui 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).

  • Method and apparatus for packing permanent magnet powder
    Patent number: 5004580
    Abstract: A method and apparatus for packing a permanent magnet powder wherein a solenoid coil is provided near the opening of a cylindrical molding space of a mold in such a manner that the direction of the central axis of the solenoid coil substantially coincides with the central axis of the molding space, and an alternating current magnetic field is applied, so that a permanent magnet powder above the opening is packed into the molding space. A magnetic pole may be provided in the center of the solenoid coil. The method of the present invention can be applied to not only a powder for a sintered magnet but also a powder for a bonded magnet.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: April 2, 1991
    Assignee: Fuji Electrochemical Co. Ltd.
    Inventors: Yoshio Matsuo, Hirofumi Nakano, Masakuni Kamiya, Kezuo Matsui