Patents by Inventor Sei Murai

Sei Murai 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).

  • Superconducting coil and manufacturing method thereof
    Patent number: 5708405
    Abstract: A superconducting coil bas a winding wire portion which is formed by winding a superconducting wire covered with an insulating material around a winding frame composed of such a material that its modulus of longitudinal elasticity is 50 (GPa) or greater, and its thermal contraction rate between a room temperature and a temperature of 77 (K) is 0.35% or above while applying a tensile force thereto, and a bonding material impregnated between the superconducting wires and is then solidified by a heat treatment to reduce a contact surface pressure between the winding wire portion and the winding frame, preventing transition to a normal conductive state.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: January 13, 1998
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideshige Moriyama, Hiroki Sekiya, Tamiko Hirumachi, Hisayasu Mitsui, Susumu Mine, Takahiro Tsuchihashi, Akio Tanaka, Sei Murai, Takayuki Kobayashi, Hiroshi Hatano