Patents by Inventor Shuichi Hiruma

Shuichi Hiruma 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).

  • Magnetization pattern of rotor magnet for stepping motor
    Patent number: 7095149
    Abstract: A magnetization pattern of a rotor magnet for a stepping motor includes a plurality of magnetization portions, which is provided on the rotor magnet in a rotation direction of the rotor magnet. The magnetization portions have different magnetic poles which are alternately arranged. Some magnetization portions of the magnetization portions have respectively magnetization widths A. Said some magnetization portions are opposed each other with a rotary axis or the rotor magnet as a center among said some magnetization portions. The other magnetization portions of the magnetization portions have respectively uniform widths B. Each of the magnetization widths A is greater than that of the uniform widths B.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: August 22, 2006
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Shuichi Hiruma, Takanori Sakamoto, Shigeyuki Shimomura
  • Magnetization pattern of rotor magnet for stepping motor
    Publication number: 20050264120
    Abstract: A magnetization pattern of a rotor magnet for a stepping motor includes a plurality of magnetization portions, which is provided on the rotor magnet in a rotation direction of the rotor magnet. The magnetization portions have different magnetic poles which are alternately arranged. Some magnetization portions of the magnetization portions have respectively magnetization widths A. Said some magnetization portions are opposed each other with a rotary axis or the rotor magnet as a center among said some magnetization portions. The other magnetization portions of the magnetization portions have respectively uniform widths B. Each of the magnetization widths A is greater than that of the uniform widths B.
    Type: Application
    Filed: August 13, 2004
    Publication date: December 1, 2005
    Inventors: Shuichi Hiruma, Takanori Sakamoto, Shigeyuki Shimomura