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US 4,042,991 AGranted
Parallelogram structure
AssigneeSuntech, Inc.
InventorsRobert L. Macy, Joseph E. Zupanick
Life of this patent
Estimating the term…
Abstract
A portable structure which consists of a plurality of I beams placed side by side and hinged together in a parallelogram fashion such that adjacent I beams may be folded together.
Claims5
A portable structure which may be folded together for transporation or storage and then unfolded for use, and comprising:
- a. a plurality of I beams positioned side by side and having a first plurality of alternate I beams and a second plurality of alternate I beams, with each second alternate I beam being positioned adjacent to first alternate I beams;
- and
- a. inclined pivot means for securing said plurality of I beams together such that the I beams may be folded together by having said first plurality of alternate I beams move relative to said second plurality of alternate I beams causing the top and bottom flanges of said first plurality of alternate I beams to rise over the top and bottom flanges of said adjacent plurality of second alternate I beams, and the same may be unfolded to form a structure wherein the tops of all of the plurality of I beams lie in the same plane, whereby the structure may be used as a load carrying structure.
Dependencies are inferred from the claim text.