Patents by Inventor Ichirou Arai

Ichirou Arai 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).

  • Core of motor having core sheets stacked together and method for stacking the same
    Patent number: 6700287
    Abstract: Core sheets are progressively displaced one after the other by a predetermined displacement angle in a circumferential direction of a core in such a manner that stays of the core sheets form a plurality of stairstep-shaped guide walls. Each core sheet includes projections, recesses and a through hole, which are all arranged along a concentric circle that is concentric to a rotational axis of a rotatable shaft of a motor. The projections are arranged in a first axial end surface of the core sheet, and the recesses and the through hole are arranged in a second axial end surface of the core sheet in such a manner that each projection of the core sheet is opposed to a corresponding one of the recesses of the core sheet in the axial direction of the core.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: March 2, 2004
    Assignee: Asmo Co., Ltd.
    Inventors: Jun Ohmura, Ichirou Arai
  • Core of motor having core sheets stacked together and method for stacking the same
    Publication number: 20020079778
    Abstract: Core sheets are progressively displaced one after the other by a predetermined displacement angle in a circumferential direction of a core in such a manner that stays of the core sheets form a plurality of stairstep-shaped guide walls. Each core sheet includes projections, recesses and a through hole, which are all arranged along a concentric circle that is concentric to a rotational axis of a rotatable shaft of a motor. The projections are arranged in a first axial end surface of the core sheet, and the recesses and the through hole are arranged in a second axial end surface of the core sheet in such a manner that each projection of the core sheet is opposed to a corresponding one of the recesses of the core sheet in the axial direction of the core.
    Type: Application
    Filed: December 19, 2001
    Publication date: June 27, 2002
    Inventors: Jun Ohmura, Ichirou Arai