Patents by Inventor Tomoaki Mino

Tomoaki Mino 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).

  • Inverter apparatus and uinterruptible power supply using the same
    Patent number: 5446645
    Abstract: In a uninterruptible power supply in which a plurality of inverters are operated in parallel, a current control loop is provided which responds to the magnitude of an output current of each inverter brought into parallel running to change a command value for a voltage waveform control circuit associated with each inverter, and the gain of the current control loop is made to be variable, whereby currents shared by the inverters can be set desirably to effectively suppress a cross current flowing between the inverters upon establishment of parallel running.
    Type: Grant
    Filed: February 18, 1993
    Date of Patent: August 29, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Hidefumi Shirahama, Yorito Jifuku, Akira Kobayashi, Keizo Shimada, Norikazu Tokunaga, Yoshimi Sakurai, Ikuo Yamato, Tomoaki Mino, Satoru Inukai
  • Constant pressure type boiling cooling system
    Patent number: 4502286
    Abstract: A constant pressure boiling cooling system including evaporators, a condenser and a liquid refrigerant sump, wherein the evaporators and the condenser are arranged substantially horizontally in side-by-side relation, and the first communicating tubes connect the upper portions of the evaporators to the upper portions of the condenser respectively, and the second communicating tubes connect the lower portions of the evaporators to the lower portions of the condenser respectively.
    Type: Grant
    Filed: August 4, 1983
    Date of Patent: March 5, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Sadayuki Okada, Hisao Sonobe, Tomoaki Mino