Patents by Inventor Tooru Mamiya

Tooru Mamiya 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 of polishing
    Patent number: 5083401
    Abstract: A rotor is formed by rotationally cutting a metal mass mounted on a machine tool shaft under computer control, and also its outer periphery is formed with annular grooves by rotational cutting. The rotor is rotated on a shaft while feeding an abrasive to it, while a workpiece set on a stage movable along three perpendicular axes, i.e., X-, Y and Z-axes, urged against the rotor by moving the stage in the Z-axis direction. The surface of the workpiece is polished by causing the stage to be moved in the X-axis direction and reciprocated in the Y-axis direction, the urging pressure being controlled by measuring it with a pressure sensor.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: January 28, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mikio Yamashita, Shigekazu Hara, Hiroyuki Matsunaga, Tooru Mamiya, Masakazu Hamada