Folding ladder
AssigneeMetarplastic S.p.A.
InventorAldo Mucelli
Life of this patent
Estimating the term…
Abstract
A folding ladder comprising two pairs of uprights hinged at their top and a plurality of rungs connected to said uprights, in which each rung is formed from two equal portions hinged together and is connected to the other rungs at said point of mutual hinging by a rod parallel to the uprights. Moreover the rungs are hinged at their ends to said uprights for passing from the working configuration of the ladder in which they are orthogonal to the uprights, to the folded configuration of the ladder in which they are substantially parallel to the uprights.
Claims4
A folding ladder comprising two pairs of uprights (1,1', 2,2') hinged at their top and a plurality of rungs (4) connected to said uprights, characterised in that each rung (4) is formed from two equal portions (4') hinged together and is connected to the other rungs (4) at said point of mutual hinging by a rod (8,8') parallel to the uprights, and in that the rungs (4) are hinged at their ends to said uprights for passing from the working configuration of the ladder in which they are orthogonal to the uprights, to the folded configuration of the ladder in which they are substantially parallel to the uprights, each pair of uprights being provided lowerly with a stop structure (9) constituted by two bars (10) hinged at their inner end to a block (11) in which the central rod (8,8') slides, and hinged at their outer end to the upright (1,1', 2,2'), said bars acting as struts on said block (11) when the ladder is in its working state.
A folding ladder comprising two pairs of uprights (1,1', 2,2') hinged at their top and a plurality of rungs (4) connected to said uprights, characterised in that each rung (4) is formed from two equal portions (4') hinged together and is connected to the other rungs (4) at said point of mutual hinging by a rod (8,8') parallel to the uprights, and in that the rungs (4) are hinged at their ends to said uprights for passing from the working configuration of the ladder in which they are orthogonal to the uprights, to the folded configuration of the ladder in which they are substantially parallel to the uprights, and a platform (14) constructed in three foldable portions, the central portion (14') being hinged to the upper rung of one of the two pairs of uprights.
Dependencies are inferred from the claim text.