Patents Assigned to The United States of America as represented by the United States Energy Research and Developmnent Administration
  • Manipulator for hollow objects
    Patent number: 4006930
    Abstract: A device for gripping the interior of a tubular object to pull it out of a body in which it has become stuck includes an expandable rubber tube having a plurality of metal cables lodged in the exterior of the rubber tube so as to protrude slightly therefrom, means for inflating the tube and means for pulling the tube longitudinally of the tubular object.
    Type: Grant
    Filed: March 15, 1961
    Date of Patent: February 8, 1977
    Assignee: The United States of America as represented by the United States Energy Research and Developmnent Administration
    Inventors: William E. Cawley, Charles E. Frantz