Patents by Inventor Ryosaku Shibayama

Ryosaku Shibayama 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).

  • Non-uniform resistance heating tubes
    Patent number: 4720624
    Abstract: This is a non-uniform resistance heating tube constituting a simulated nuclear fuel cluster in a heat transfer test facility for nuclear reactor. This resistance heating tube has a fixed outside diameter and its thickness is molded so that an electric resistance distribution changes continuously corresponding to the power distribution state of nuclear fuel rod in the axial direction of the tube. This resistance heating tube can be obtained by drawing an original pipe, rolling it into an axially uniform thick, then grinding its outer surface so that its thickness becomes non-uniform continuously in the axial direction of the tube, and thereafter smoothing the outer surface of the tube by swaging so that its outside diameter becomes uniform.
    Type: Grant
    Filed: July 25, 1984
    Date of Patent: January 19, 1988
    Assignees: Doryokuro Kakunenryo Kaihatsu Jigyodan, Tokyo Seimitsuka Co., Ltd.
    Inventors: Akira Kikuchi, Akira Tobita, Tetsuo Kobori, Ryosaku Shibayama