Patents by Inventor Kenji Yaginuma

Kenji Yaginuma 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).

  • Method of winding A.C. generator stator
    Patent number: 4864716
    Abstract: To improve a coil packing ratio and reduce winding time of a A.C. generator stator, a wound coil of a first group is inserted in advance to coil inserting jig, with a wound coil of a second group having the same shape as that of the coil of the first group then being fitted to the coil inserting jig with predetermined pitch deviation. Thereafter, the wound coils of the first and second groups are simultaneously inserted into slots of the stator by the coil inserting jig.
    Type: Grant
    Filed: June 11, 1987
    Date of Patent: September 12, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Yaginuma, Youichi Sawahata, Tadayuki Suenobu