Patents Assigned to Rig-A-Matic, Inc.
  • Patent number: 4386883
    Abstract: A materials lifting apparatus for transporting materials, such as pipe between a derrick floor and a pipe rack, which comprises a support frame having a carriage receiving passageway therein, a carriage positionable within the carriage receiving passageway, and a forward linkage assembly pivotally connecting a first end portion of the carriage to the support frame, the forward linkage assembly being movable between a lowered position and a raised position, in the lowered position of the forward linkage assembly the carriage being disposed in a substantially horizontal position within the carriage receiving passageway of the support frame, in the raised position of the forward linkage assembly the first end portion of the carriage being disposed in a raised, longitudinally shifted position.
    Type: Grant
    Filed: September 30, 1980
    Date of Patent: June 7, 1983
    Assignee: Rig-A-Matic, Inc.
    Inventors: Arthur S. Hogan, Paul G. McCann, Jr.