Patents by Inventor Da Qing Huang

Da Qing Huang 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).

  • Voice coil motor with magnet having protrusion
    Patent number: 8780502
    Abstract: A voice coil motor for a disk drive unit includes an external magnet and an actuator coil movably located above the external magnet. The external magnet has a main body with a magnetic north pole, a magnetic south pole and a transition surface therebetween, and further has a protrusion extending from the center part of the main body for increasing torque force, thereby improving the performance of the voice coil motor. The invention also discloses a disk drive unit including the same.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: July 15, 2014
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Daisuke Shirato, Da qing Huang, Huan yin Zhong
  • VOICE COIL MOTOR AND DISK DRIVE UNIT WITH THE SAME
    Publication number: 20120300345
    Abstract: A voice coil motor for a disk drive unit includes an external magnet and an actuator coil movably located above the external magnet. The external magnet has a main body with a magnetic north pole, a magnetic south pole and a transition surface therebetween, and further has a protrusion extending from the center part of the main body for increasing torque force, thereby improving the performance of the voice coil motor. The invention also discloses a disk drive unit including the same.
    Type: Application
    Filed: July 11, 2011
    Publication date: November 29, 2012
    Applicant: SAE Magnetics (H.K.) Ltd.
    Inventors: Daisuke SHIRATO, Da qing HUANG, Huan yin ZHONG
  • Voice coil motor for a hard disk drive
    Publication number: 20040052002
    Abstract: An actuator driving mechanism and a method of manufacture for that mechanism are disclosed. In one embodiment, the actuator driving mechanism includes a statically located stator generating a variable magnetic field to act upon a mobile rotator generating a permanent magnetic field. In a further embodiment, the stator includes a set of driving coils to generate the variable magnetic field and the rotator includes a permanent magnet coupled to a holding frame.
    Type: Application
    Filed: February 10, 2003
    Publication date: March 18, 2004
    Inventors: Jeffery L. Wang, Liu Jun Zhang, Ping Shang, Da Qing Huang, Ji Yang