Patents by Inventor Niroot Jierapipatankul

Niroot Jierapipatankul 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).

  • Disc stack assembly having a clamp plate and a retaining ring to clamp a disc to a spindle motor hub
    Patent number: 6760188
    Abstract: A disc stack assembly for use in a disc drive. A spindle motor hub includes an annular ring recess. A disc is clamped to the spindle motor hub by a disc clamp assembly comprising a clamp plate and a retaining ring. The clamp plate includes an inner ring engagement portion, an outer disc engagement portion, and an initial, substantially planar shape in an undeformed state. The retaining ring is secured within the annular ring recess and maintains the clamp plate in a conically deformed state so that the inner ring engagement portion of the clamp plate applies a first moment force against the retaining ring while the outer disc engagement portion of the clamp plate applies a second moment force as an axially directed clamping force upon the disc.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: July 6, 2004
    Assignee: Seagate Technology LLC
    Inventors: Victor ChiSiang Choo, Kok Loong Teng, Niroot Jierapipatankul, Kok Tong Soh, Johnny Soh, Sen Chai Khew, Chee Suan Low