Patents by Inventor Harald Sperl

Harald Sperl 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).

  • Film strip positioning for X-ray testing of pipes
    Patent number: 4311905
    Abstract: An apparatus for X-ray testing of pipes following ultrasonic testing includes a reversible roller track for telescoping a pipe upon a cantilever arm which can be moved up and down on a stand and carrying an endless belt with resilient U-shaped holders for supporting film strips to be moved into the pipe and adjacent to suspected defects. Reversal of the belt drive permits removal of the exposed film strips as the pipe is moved out.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: January 19, 1982
    Assignees: Mannesmann Aktiengesellschaft, Rich. Seifert & Co. GmbH & Co. KG
    Inventors: Karl Ries, Kurt Hannoschock, Krsto-Marijan Rozic, Gunter Basler, Harald Sperl, Kurt Weinschenk