Patents by Inventor Toshio Saotome

Toshio Saotome 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).

  • Patent number: 4851731
    Abstract: A flat type DC motor applicable for disc drive of an electronic still camera in which vibrations of the rotor axle are prevented without increasing manufacturing costs by providing the magnetic field between the stator and rotor to by asymmetrical so that the magnetic attracting force of the rotor to the stator is also asymmetrical. The asymmetrical attracting force causes the axle of the rotor to be urged in the same radial direction relative to the axle bearing in the stator, thus, movements of the axle in radial directions in the clearance between the axle and bearing of the stator are eliminated and the rotor rotates without vibrating.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: July 25, 1989
    Assignee: Sony Corporation
    Inventors: Toshio Saotome, Yoshiyuki Noguchi, Mitsuo Nishikawa, Shigeki Yamazaki