Patents by Inventor Tadashi Uchikawa

Tadashi Uchikawa 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).

  • System and method of confirming operation of a steam relieving safety valve for a water-cooled nuclear reactor
    Patent number: 4648425
    Abstract: A system and a method of confirming the operation of a steam relieving safety valve for a water-cooled nuclear reactor are provided. Acoustic vibration generated by steam relieved from the safety valve when the latter is opened is detected by an acoustic emission sensor. The acoustic emission sensor is mounted on the safety valve or a steam relief pipe connected to the safety valve.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: March 10, 1987
    Assignee: Doryokuro Kakunenryo Kaihatsu Jigyodan
    Inventors: Kenshu Watanabe, Tadashi Uchikawa, Masashi Takiyama, Takashi Kurahashi