Patents by Inventor Seigo Matsumoto

Seigo Matsumoto 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).

  • Disk holding mechanism and disk holding mechanism clamper
    Patent number: 6721263
    Abstract: A disk retaining mechanism that realizes a reduction of its thickness while maintaining a clamping force and a centering accuracy of the clamper, with a structure, in which: a guide (11) is disposed in a manner to closely confront a clamper retaining member (9); a clamper unit retaining portion of the clamper retaining member (9) has such a shape that a part of which an entire circumference is cut out; a clamper unit for depressing a disk (13) is provided with a disk holder (3) having an engagement projection (M); and an annular engagement groove (F) formed in a turntable (7) for loading the disk (13) is arranged below an upper end of a main shaft (8) that transfers rotation of a motor unit (10).
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: April 13, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hidehiko Ota, Yoshinori Takada, Hideaki Yamataka, Seigo Matsumoto, Tsuyoshi Hashida