Patents by Inventor Masaki ISONO

Masaki ISONO 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).

  • Spindle motor and disk drive apparatus
    Patent number: 8867165
    Abstract: A spindle motor includes a stationary portion defined by a base portion, a stator core arranged on the side of an upper surface of the base portion, and a coil attached to the stator core. A rotating portion includes a magnet arranged on a radially inner side of the stator core, a first supporting surface which is in contact with a lower surface of a disk, and a disk supporting portion arranged on a radially outer side than the magnet. The stator core includes a ring-shaped core back, and a plurality of teeth. The disk supporting portion is positioned radially outward from a radially inner end portion of the teeth and radially inward from the coil. The radially inner end portion of the teeth, the disk supporting portion, and the coil overlap in the radial direction.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: October 21, 2014
    Assignee: Nidec Corporation
    Inventor: Masaki Isono
  • SPINDLE MOTOR AND DISK DRIVE APPARATUS
    Publication number: 20130050870
    Abstract: A spindle motor includes a stationary portion defined by a base portion, a stator core arranged on the side of an upper surface of the base portion, and a coil attached to the stator core. A rotating portion includes a magnet arranged on a radially inner side of the stator core, a first supporting surface which is in contact with a lower surface of a disk, and a disk supporting portion arranged on a radially outer side than the magnet. The stator core includes a ring-shaped core back, and a plurality of teeth. The disk supporting portion is positioned radially outward from a radially inner end portion of the teeth and radially inward from the coil. The radially inner end portion of the teeth, the disk supporting portion, and the coil overlap in the radial direction.
    Type: Application
    Filed: July 31, 2012
    Publication date: February 28, 2013
    Applicant: NIDEC CORPORATION
    Inventor: Masaki ISONO