Patents by Inventor Yuji Kosakamoto

Yuji Kosakamoto 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: 9082450
    Abstract: A spindle motor includes a stationary portion and a rotating portion. The stationary portion includes a base member, a stator core, coils, and a circuit board. The base member includes a middle region, a peripheral region, jetty portions, a recessed portion, and at least one through hole. The jetty portions are positioned at least axially below the peripheral region, and include a pair of extension portions. The recessed portion is arranged inside the jetty portions, and a portion of the circuit board is arranged in the recessed portion. The at least one through hole is arranged to pass through the middle region in an axial direction. The recessed portion is covered with a sealant.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: July 14, 2015
    Assignee: Nidec Corporation
    Inventors: Yuji Kosakamoto, Taisuke Kanemasa, Masaaki Nakagawa