Patents Assigned to Masao Hiroi
  • Thrust generator
    Patent number: 5314311
    Abstract: A ship has an electromagnetic thrust generator including a cylindrical magnet in which there is arranged a helical duct for conducting sea water. The magnet includes a coil housing in which a superconducting coil is disposed. The duct includes an outer wall disposed opposite the internal surface of the coil housing. Electrode members are mounted on inner and outer walls of the duct to create an electrical field across the duct.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: May 24, 1994
    Assignees: Koatsu Gas Kogyo Co., Ltd., Masaaki Muroya, Masao Hiroi
    Inventor: Eiichi Tada