Patents by Inventor Juzaburo Shibayama

Juzaburo Shibayama 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: 6262508
    Abstract: It is an object of the present invention to provide a rotary electrical device that can be manufactured easily, and which produces a high output torque at low operating speeds. The rotary electrical device comprises: a stator core. The rotary electrical device comprises: a stator core having Z1 stator slots for receiving three-phase windings which generate a rotational magnetic field of p magnetic pole pairs in the stator core, and Z1 permanent magnets being provided in tooth sections fabricated between the stator slots around the stator core; and a rotor core having Z2 permanent magnets being provided around the rotor core; wherein Z1, Z2 and p are related by an expression Z2=Z1±p, and direction of magnetic poles of all permanent magnets are aligned identically in a radial direction.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: July 17, 2001
    Assignee: Ebara Corporation
    Inventors: Juzaburo Shibayama, Noboru Aoki