Patents by Inventor Isamu Numata

Isamu Numata 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).

  • Linear drive unit reducing stress generated in movable part in horizontal direction
    Patent number: 7138734
    Abstract: In order to reduce load supported by a support mechanism for supporting a movable part so as to prevent the movable part from moving in a horizontal direction when stress is generated thereon in the horizontal direction, there is provided a drive unit including a primary side having a magnetic body around which a coil is wound, and a secondary side having a plurality of permanent magnets, the primary side including magnetic poles and step portions provided on the magnetic poles. The width of each step portion is smaller than the width of each permanent magnet.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: November 21, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Houng Joong Kim, Kohji Maki, Yasuo Morooka, Isamu Numata, Hisao Tadokoro, Takeo Morimoto, Yasunori Sannohe, Hiroshi Ueno, Hideki Shimane
  • Linear drive unit reducing stress generated in movable part in horizontal direction
    Publication number: 20050200209
    Abstract: In order to reduce load supported by a support mechanism for supporting a movable part so as to prevent the movable part from moving in a horizontal direction when stress is generated thereon in the horizontal direction, there is provided a drive unit including a primary side having a magnetic body around which a coil is wound, and a secondary side having a plurality of permanent magnets, the primary side including magnetic poles and step portions provided on the magnetic poles. The width of each step portion is smaller than the width of each permanent magnet.
    Type: Application
    Filed: May 10, 2005
    Publication date: September 15, 2005
    Inventors: Houng Kim, Kohji Maki, Yasuo Morooka, Isamu Numata, Hisao Tadokoro, Takeo Morimoto, Yasunori Sannohe, Hiroshi Ueno, Hideki Shimane
  • Drive unit
    Publication number: 20040189104
    Abstract: In order to reduce load supported by a support mechanism for supporting a movable part so as to prevent the movable part from moving in a horizontal direction when stress is generated thereon in the horizontal direction, there is provided a drive unit including a primary side having a magnetic body around which a coil is wound, and a secondary side having a plurality of permanent magnets, the primary side including magnetic poles and step portions provided on the magnetic poles. The width of each step portion is smaller than the width of each permanent magnet.
    Type: Application
    Filed: April 12, 2004
    Publication date: September 30, 2004
    Inventors: Houng Joong Kim, Kohji Maki, Yasuo Morooka, Isamu Numata, Hisao Tadokoro, Takeo Morimoto, Yasunori Sannohe, Hiroshi Ueno, Hideki Shimane
  • Drive unit
    Publication number: 20030155819
    Abstract: In order to reduce load supported by a support mechanism for supporting a movable part so as to prevent the movable part from moving in a horizontal direction when stress is generated thereon in the horizontal direction, there is provided a drive unit including a primary side having a magnetic body around which a coil is wound, and a secondary side having a plurality of permanent magnets, the primary side including magnetic poles and step portions provided on the magnetic poles. The width of each step portion is smaller than the width of each permanent magnet.
    Type: Application
    Filed: August 16, 2002
    Publication date: August 21, 2003
    Inventors: Houng Joong Kim, Kohji Maki, Yasuo Morooka, Isamu Numata, Hisao Tadokoro, Takeo Morimoto, Yasunori Sannohe, Hiroshi Ueno, Hideki Shimane