Patents by Inventor Shouji Fujisawa

Shouji Fujisawa 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).

  • Patent number: 5760500
    Abstract: An XY table that uses linear electromagnetic actuators to achieve faster operating speeds, improve durability, prevent generation of dust and reduce size (make more compact). The cord for supplying electrical power to the linear electromagnetic actuators and the cords for obtaining signals from each type of sensor are concentrated at an intermediate movement member (X table), and gathered together into a single cord that is used for connection to the outside (controller, etc.). As a result, detrimental effects caused by the cord are minimized which enables the XY table to demonstrate the performance described above.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: June 2, 1998
    Assignee: Nippon Thompson Co., Ltd.
    Inventors: Takuo Kondo, Shouji Fujisawa, Norimitsu Kitade
  • Patent number: 5644176
    Abstract: A linear direct current motor that is able to maintain thrust at a constant level at all times regardless of changes in the relative positions of the primary and secondary sides. The motor includes a magnetic pole detection magnet having a number of magnetic poles one greater than that of a field magnet, and magnetic pole discrimination elements in the form of Hall effect elements that are acted on by the magnetic pole detection magnet.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: July 1, 1997
    Assignee: Nippon Thompson Co., Ltd.
    Inventors: Satoru Katagiri, Hidehito Oohira, Shouji Fujisawa