Portable bridge structure
OwnerSamuel Laboy-Alvaradoinventor
Life of this patent
Estimating the term…
Abstract
A portable bridge structure includes a pair of releasably connectable stair and platform assemblies which form opposite ends of the bridge structure. Each assembly includes several components which are movable between folded and erected positions. When all the components are in their folded positions, each assembly forms a flat, compact bundle to facilitate transport and storage of the bridge structure. The components of each assembly include pivotally interconnected stair and platform sections and bracing means for retaining the sections in erected positions at selected angles of relative inclination. In preferred practice, each assembly also includes foldable stabilizer and railing structures carried respectively on the stair and platform sections.
Claims10
A portable bridge structure, comprising:
- a. a pair of stair and platform assemblies each including a stair section and a platform section, and assembly interconnection means for releasably connecting the platform sections to form a bridge with the stair sections at opposite ends of the bridge;
- b. each of the assemblies including section interconnection means pivotally connecting its stair and platform sections for movement between assembly folded and assembly erected positions;
- c. each of the assemblies additionally including bracing means for releasably maintaining its stair and platform sections in one of a plurality of predetermined assembly erected positions, the bracing means being pivotally connected to one of the sections for movement between brace folded and brace erected positions and being selectively connectable when in brace erected positions with one of a plurality of formations carried on the other sections;
- d. each of the stair sections including a plurality of tread members and support means pivotally connected to the tread members for maintaining load support surfaces defined on the tread members in substantially parallel relationship as the tread members pivot relative to the support means between stair folded and stair erected positions;
- e. the sections, bracing means, tread members and support means of each assembly being operative when in the assembly folded, brace folded and stair folded positions, respectively, to lie closely alongside each other to form a compact, substantially flat bundle.
Dependencies are inferred from the claim text.