Patents by Inventor Hiroki Kajiwara

Hiroki Kajiwara 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).

  • Cryogenic liquefied pump system
    Patent number: 4593835
    Abstract: A cryogenic liquefied pump system which includes a pump having a drive motor, bearings, a drive shaft, and an impeller adapted to be disposed in a vessel storing a cryogenic liquid. An outer insulating tank is mounted in the vessel and an inner insulating tank is mounted inside the outer insulating tank, with a vacuum layer being interposed between the inner and outer insulating tanks. An inner side of the inner insulated tank, in which the motor and bearings are arranged, is maintained at a room temperature, with a tip portion of the inner insulating tank being formed into an outer case extending into a cryogenic region outside of the outer insulated tank.
    Type: Grant
    Filed: April 26, 1984
    Date of Patent: June 10, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Seiichi Kikkawa, Hisanao Ogata, Yoshinori Hakuraku, Masahiro Mase, Nobuo Tsumaki, Yoshihisa Awada, Hiroki Kajiwara