Patents by Inventor Fuyuki Shirai

Fuyuki Shirai 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 clamping unit with a plurality of particles in a synthetic resin coating formed on either the clamper or the disk table
    Patent number: 5809002
    Abstract: A clamp unit for a disk comprises a disk table on which a disk is mounted and a clamper disposed in association with the disk table for clamping the disk under pressure therebetween. A film is formed on a surface of either one of the disk table and the clamper and formed of a mixture a synthetic resin and a plurality of fine particles disposed in the synthetic resin, both having viscous and elastic property, and some of the particles are exposed outside an outer surface of the film so as to provide an irregular surface having protruded portions.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: September 15, 1998
    Assignee: Pioneer Electronic Corporation
    Inventors: Akira Takahashi, Fuyuki Shirai, Jiro Morinaga, Yasushi Konno
  • Polycarbonate turntable for a compact disk player
    Patent number: 5241530
    Abstract: A compact disk player has a polycarbonate turntable, and a clamper (201) for clamping a compact disk on the turn table. The turn table is made of the same material (polycarbonate) as the compact disk and includes a disk body, a central hub projected from the disk body to receive a center hole of a compact disk and a peripheral annular portion formed integrally with the disk body.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: August 31, 1993
    Assignee: Pioneer Electronic Corporation
    Inventors: Kazuo Kobayashi, Yoshinori Yamada, Masakazu Kurumada, Shinji Nakayama, Akira Takahashi, Fuyuki Shirai