Patents by Inventor Youji Maki

Youji Maki 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).

  • Electric motor with adhesively mounted magnet yoke
    Patent number: 5264749
    Abstract: An electric motor having a cylindrical frame with a thickness less than that of conventional electric motors. A tubular inner yoke is inserted in the cylindrical frame and in combination therewith serves as a magnetic path. The total thickness of the cylindrical frame and the inner yoke serves as a magnetic path substantially the same as that of a conventional electric motor frame. The inner yoke and thinner frame construction of the present invention reduces the total weight of the electric motor as compared with conventional electric motors. Additionally, the inner yoke has a plurality of protrusions for positioning the permanent magnets of the electric motor both axially and circumferentially thereon.
    Type: Grant
    Filed: December 12, 1991
    Date of Patent: November 23, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Maeda, Youji Maki, Norio Umezawa