Patents by Inventor Akemi Hijikata

Akemi Hijikata 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).

  • Heat insulating support device for cryogenic equipment
    Patent number: 4838033
    Abstract: An improved heat-insulating support device is disclosed which is capable of supporting a coolant tank to a vacuum vessel in a manner such that when the vacuum tank is subjected to a great external force after the coolant tank has been cooled down to a cryogenic temperature, the coolant tank and hence cryogenic equipment mounted thereon are held in place and prevented from being displaced beyond a prescribed allowable range, without impairing the intended heat-insulating capability thereof.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: June 13, 1989
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuuichi Yamamoto, Tadaaki Nakamura, Takashi Murai, Akemi Hijikata
  • Fuel cell
    Patent number: 4767680
    Abstract: A fuel cell comprises a gas separator having a dense layer, with porous portions disposed on both faces of the dense layer. The fuel cell, therefore, can store excess electrolyte, and absorb volume changes in the electrolyte without accompanying "flooding". Further, the fuel cell can reduce the thickness of a unit cell, and improve the space factor to output of the fuel cell.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: August 30, 1988
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Akemi Hijikata, Masaaki Matsumoto, Taesuke Nakayama, Yasuyuki Hamazaki, Kenji Kataoka