Parallelogram structure

Details Parallelogram structure Parallelogram structure

1976-06-21

1977-08-23

Byers, Jr., Nile C.

Bridges

Transportable

14 17, 14 73, 52645, 404 35, 182159, E01D 152

Patent

active

040429911

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.

REFERENCES:
patent: 400778 (1889-04-01), Lowe
patent: 1252873 (1918-01-01), Adams
patent: 2192269 (1940-03-01), Maddock
patent: 2344772 (1944-03-01), Heidenreich
patent: 2744590 (1956-05-01), Butts
patent: 3138812 (1964-06-01), Prosser
patent: 3722622 (1973-03-01), Lauring

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