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Priority to ES1968137125UpriorityCriticalpatent/ES137125Y/en
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Publication of ES137125YpublicationCriticalpatent/ES137125Y/en
Improved staircase, essentially characterized by the fact that it consists of a lattice platform whose stringers of the frame that it is formed slide guided by the interior of tubular sleeves joined to the tubes that form the articulated support legs of the staircase, being also joined articulately the ends of the said stringers, to the parallel tubes in which the steps are mounted in such a way that when the staircase is opened, the lattice platform is lowered and placed in cantilever, acting the stringers of it of limiting braces of the opening being the steps are formed by the corresponding plates configured in the form of a box, with ribs or recessed grooves of reinforcement. (Machine-translation by Google Translate, not legally binding)