Lightweight, collapsible bridge module, and system with deployme

Details Lightweight, collapsible bridge module, and system with deployme Lightweight, collapsible bridge module, and system with deployme

1989-03-02

1990-10-16

Massie, IV, Jerome W.

Bridges

Transportable

14 5, E01D 1512

Patent

active

049625560

ABSTRACT:
A modular lightweight bridge comprises a pair of tubular truss formed spans, each of which include a plurality of modules hinged to one another at locations on the bottom of the bridge for folding the bridge for transport prior to deployment of the bridge. Each span has a unique high strength fabric deck or roadway surface tensioned across the upper side of the truss chord members. The bridge is uniquely captively mounted on a trailer by rollers for transporting the bridge when it is in its folded mode. When the bridge is to be deployed, each span is unfolded by pivoting the modules with respect to one another about vertical axes so that the spans expand longitudinally with respect to the trailer. The spans are then pivoted 90.degree. downwardly about longitudinally extending horizontal axes and the bridge rolled rearwardly from the trailer over the gap to be spanned. Due to the unique captive roller interconnection between the bridge assembly and its transport-deployment trailer, the trailer can thereafter be stored beneath the deployed bridge hanging down into the gully or gap. When a decision is made to remove the bridge, the trailer can be towed from either side back over the bank of the gap and the bridge refolded for mounting on and transport by the trailer.

REFERENCES:
patent: 3105251 (1963-10-01), Stevens, Jr. et al.
patent: 4521932 (1985-06-01), Parramore
patent: 4635311 (1987-01-01), Helmke
Popular Mechanics, "Portable One Track Bridge Carried by Soldier", Feb., 2, p. 54.

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