Patents by Inventor Naoki Tasai

Naoki Tasai 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).

  • Method for leakage prevention of lubricating fluid, spindle motor using the method, and recording disk driving apparatus using the spindle motor
    Publication number: 20060191881
    Abstract: A coupling method, a spindle motor using the coupling method and a recording disk driving apparatus using the spindle motor are disclosed. An upper depression (43) and a lower depression (44) of a hub (4) are welded to an upper seal (61) and a lower seal (62), respectively. The weld zone is coated with an oil repellant (700) or welded again by laser with a smaller energy. A pore, even if generated at the weld zone, is closed by the oil repellant (700) or the opening of the pore is melted and filled thereby to prevent the leakage of a lubricating fluid (600) out of a motor.
    Type: Application
    Filed: December 13, 2005
    Publication date: August 31, 2006
    Applicant: Nidec Corporation
    Inventors: Wataru Yamauchi, Masaaki Karuo, Naoki Tasai