Patents by Inventor Keiji Tojyo

Keiji Tojyo 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 for producing a commutator
    Patent number: 7854055
    Abstract: A commutator includes a conductive part that has a cylindrical body and a plurality of coil latching portions at intervals circumferentially on one axial end; and an insulating part formed inside the conductive part. The conductive part includes segments that are insulated for each latching portion by cutting axially the conductive part, and latching claws that are provided in a projecting state on an inner peripheral surface of the segments and embedded in the insulating part, wherein the latching claws include axial latching claws that are long in an axial direction and project inward, and circumferential latching claws that project circumferentially.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: December 21, 2010
    Assignee: Mitsuba Corporation
    Inventors: Shuichi Fusegawa, Minoru Isoda, Keiji Tojyo
  • Commutator, mold for producing commutator, and method for producing commutator
    Publication number: 20080143212
    Abstract: A commutator includes a conductive part that has a cylindrical body and a plurality of coil latching portions at intervals circumferentially on one axial end; and an insulating part formed inside the conductive part. The conductive part includes segments that are insulated for each latching portion by cutting axially the conductive part, and latching claws that are provided in a projecting state on an inner peripheral surface of the segments and embedded in the insulating part, wherein the latching claws include axial latching claws that are long in an axial direction and project inward, and circumferential latching claws that project circumferentially.
    Type: Application
    Filed: December 14, 2007
    Publication date: June 19, 2008
    Applicant: MITSUBA CORPORATION
    Inventors: Shuichi Fusegawa, Minoru Isoda, Keiji Tojyo