Patents by Inventor Shunichiro Ishida

Shunichiro Ishida 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).

  • Method and apparatus for detecting defective portion on outer surface of pipe
    Patent number: 4988210
    Abstract: A method and apparatus for detecting a defective portion on the outer surface not exposed of a pipe, which comprises: heating or cooling a pipe, the outer surface of which is not exposed, from the side of the inner surface thereof so that a difference in temperature is produced between a portion of the inner surface of the pipe corresponding to an accumulation of foreign matters or a thinner portion as a defective portion on the outer surface not exposed of the pipe and a portion of the inner surface of the pipe corresponding to a normal portion of the outer surface of the pipe; then shooting the inner surface of the pipe by means of a thermal imaging system while the difference in temperature still remains on the inner surface of the pipe to obtain a thermal image of the difference in temperature; and detecting the accumulation of foreign matters or the thinner portion as the defective portion on the outer surface of the pipe by means of the thus obtained thermal image.
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: January 29, 1991
    Assignee: NKK Corporation
    Inventors: Toshio Koshihara, Koji Ishihara, Toru Hirashima, Shunichiro Ishida, Haruhito Okamoto, Yuji Matoba