Patents by Inventor Naoya Tsurusaki

Naoya Tsurusaki 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 and control method of unloading corresponding to fall detection in disk drive device
    Patent number: 7995302
    Abstract: Embodiments of the present invention improve the safety against a fall of a disk drive device. In one embodiment, when an HDD has recognized detection result data of a fall sensor to indicate a fall, the HDD unloads a head slider from above a disk to a stand-by position. The HDD checks whether or not the detection result data of the fall sensor indicates a fall on the occasion of a seek start. If the data indicates a fall, the controller unloads an actuator. The HDD issues a seek fake error on the occasion of a seek completion. On the occasion of a re-seek start in the error recovery process, the HDD conducts a fall check referring to the detection result data.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: August 9, 2011
    Assignee: Hitachi Global Storage Technologies, Netherlands B.V.
    Inventors: Sayaka Nojiri, Shinji Matsushita, Naoya Tsurusaki, Hirofumi Saitoh
  • Disk drive device and control method of unloading corresponding to fall detection in disk drive device
    Publication number: 20090268334
    Abstract: Embodiments of the present invention improve the safety against a fall of a disk drive device. In one embodiment, when an HDD has recognized detection result data of a fall sensor to indicate a fall, the HDD unloads a head slider from above a disk to a stand-by position. The HDD checks whether or not the detection result data of the fall sensor indicates a fall on the occasion of a seek start. If the data indicates a fall, the controller unloads an actuator. The HDD issues a seek fake error on the occasion of a seek completion. On the occasion of a re-seek start in the error recovery process, the HDD conducts a fall check referring to the detection result data.
    Type: Application
    Filed: April 23, 2009
    Publication date: October 29, 2009
    Inventors: Sayaka Nojiri, Shinji Matsushita, Naoya Tsurusaki, Hirofumi Saitoh