Patents by Inventor Ryuta Hama

Ryuta Hama 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).

  • Ultrasonic reactor water level measuring device and evaluation method
    Patent number: 9212943
    Abstract: An ultrasonic reactor water level measuring device and an evaluation method are provided and prevent a reduction in the measurement accuracy of a water level that is in a wide measurement range. The ultrasonic reactor water level measuring device includes an upper tube extending from a gas phase portion in a reactor, a lower tube extending from a liquid phase portion in the reactor, measurement tubes connected to each other and arranged at multiple stages between the upper tube and the lower tube, and units for generating and receiving ultrasonic waves, the units being arranged at bottom portions of the measurement tubes. The ultrasonic reactor water level measuring device measures levels of water within the measurement tubes and calculates a water level within the reactor from the sum of the measured water levels, the sum excluding an overlapped part of the measurement tubes.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: December 15, 2015
    Assignee: Hitachi-GE Nuclear Energy, Ltd.
    Inventors: Izumi Yamada, Atsushi Fushimi, Atsushi Baba, Akira Murata, Tamotsu Asano, Ryuta Hama, Mikio Koyama, Hiroaki Katsuyama, Yoshinori Musha