Patents by Inventor Robert Douglas Backer

Robert Douglas Backer 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).

  • Lift apparatus having an articulated double parallelogram boom assembly
    Patent number: 6024191
    Abstract: A lift apparatus includes a superstructure frame support, a riser, and an articulated parallelogram boom assembly operatively connected between the superstructure frame support and the riser. The articulated parallelogram boom assembly includes a floating frame, a lower parallelogram boom assembly operationally connected between the superstructure frame support and the floating frame, an upper parallelogram boom assembly operationally connected between the floating frame and the riser, and a lift mechanism for raising and lowering the articulated parallelogram boom assembly. The lower parallelogram boom assembly, the upper parallelogram boom assembly, and the lift mechanism are formed such that the maximum extension height of the articulated parallelogram boom assembly is increased without an increase in the height of the articulated parallelogram boom assembly when lowered.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: February 15, 2000
    Assignee: Kiddie Industries, Inc.
    Inventors: Robert Douglas Backer, Michael Francis Goodrich