Patent ID: 8006803

Claim:
A ladder system for a wall, said ladder comprising: a single post, an upper part of which has an arc and is provided with a hooking device; rungs arranged on said single post, on either side thereof, said rungs being hinged by their inner ends to said single post about pins which are orthogonal to said post so that said rungs can assume two end positions, namely: a folded-up position in which said rungs are applied against said single post with their outer end directed toward said upper part of said single post; and a deployed position in which said rungs are arranged orthogonally to said single post and locked downwardly by their inner ends bearing against said single post; and a bearing device to bear against said wall, on either side of said single post, said bearing device comprises two arms which are arranged symmetrically with respect to said single post, the outer ends having arcs corresponding to the arc of said upper part of the single post such that the two arms together have, in a deployed position, the at least approximate shape of a crescent, and said arms being hinged by their inner end to said single post about pins which are orthogonal to said post so that said arms can assume two end positions, namely: a folded-up position in which the two aims are applied against said single post, on either side thereof, with their respective arcs corresponding to and coextensive with the arc of said single post; and the deployed position in which the two arms are arranged orthogonally to said single post and locked downwardly by their inner end bearing against said single post; and an anchorage specially configured to said hooking device of said ladder is affixed to said wall.