Patents Assigned to Rigging International
  • Apparatus and method for moving a large object
    Patent number: 4222581
    Abstract: The method and apparatus for moving a large object using four crawler transporters disposed in a rectangular or a trapezoidal pattern under the object and which support and move the object with an effective three point suspension.
    Type: Grant
    Filed: April 7, 1978
    Date of Patent: September 16, 1980
    Assignee: Rigging International
    Inventors: Walter L. Treadwell, Kenneth F. Dewing