Patents by Inventor Yoshio Hirata

Yoshio Hirata 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 drive device rotationally driving recording disk
    Patent number: 8625232
    Abstract: A disk drive device is provided with a base, a hub on which a recording disk is to be mounted, a bearing unit arranged on the base and configured to rotatably support the hub, and a spindle drive unit configured to rotatably drive the hub. A circumferential ring wall portion is arranged on the outer circumference of the base and formed of a plastic.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: January 7, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Tomoyuki Tashiro, Yoshio Hirata, Hiroshi Iwai
  • DISK DRIVE DEVICE ROTATIONALLY DRIVING RECORDING DISK
    Publication number: 20100238590
    Abstract: A disk drive device is provided with a base, a hub on which a recording disk is to be mounted, a bearing unit arranged on the base and configured to rotatably support the hub, and a spindle drive unit configured to rotatably drive the hub. A circumferential ring wall portion is arranged on the outer circumference of the base and formed of a plastic.
    Type: Application
    Filed: January 27, 2010
    Publication date: September 23, 2010
    Applicant: ALPHANA TECHNOLOGY CO., LTD.
    Inventors: Tomoyuki TASHIRO, Yoshio HIRATA, Hiroshi IWAI
  • Aluminum electrolytic capacitor and its manufacturing method
    Patent number: 6652604
    Abstract: The object of the present invention is to provide an aluminum electrolytic capacitor and its manufacturing method. The aluminum electrolytic capacitor of the present invention comprises a capacitor element formed by winding an electrode foil, at least an anode foil of which is structured so as to have part of the surface thereof made free of an oxide film and connected with a lead. The capacitor element is placed in a bottomed metal case together with a driving electrolyte, thereby achieving low resistance, a reduction in size, high ripple-current carrying and low loss characteristics entirely due to perfect connection between the electrode foil and the lead.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: November 25, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takumi Nakata, Katsuya Fujimoto, Yoshio Mikami, Tadahiro Nakamura, Kazuya Kawahara, Yoshio Hirata, Tsuyoshi Yoshino