Patents by Inventor Shigeru Ohtake

Shigeru Ohtake 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).

  • Rotor of rotating equipment
    Patent number: 5903079
    Abstract: A rotor core is provided with a pole piece portion holding a magnet and a balance weight portion, wherein said hub fitting hole is inserted a metal hub having a tapered axis hole and part fitting portion so as to be fixed each other, and said rotor core is coated with synthetic resins, thereby the use of metal can be limited only to parts where mechanical strength is required so that the whole rotor weight can be reduced and can be assembled easily, and be allow various parts can be fitted stably, and the degradation of magnetic properties of the magnet can be prevented.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: May 11, 1999
    Assignee: Oppama Industry Co. Ltd.
    Inventors: Masao Iwata, Yoshiki Kitamura, Shigeru Ohtake