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ALASTRUEY OTAL JESUS
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ALASTRUEY OTAL JESUS
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Priority to ES0332924ApriorityCriticalpatent/ES332924A1/en
Publication of ES332924A1publicationCriticalpatent/ES332924A1/en
Improvements introduced in the structures of folding ladders, characterized by disposing all their elements in a removable manner, for which purpose the stringers constituting the structure in aluminum tubular material or other material of similar characteristics and oblong arrangement are provided, said front stringers having its upper part a handle or handle made of plastic nature, which has in its terminals insertion pins that are housed inside the upper ends of said stringers and carrying these and their rear counterparts in their lower extremities plastic skirting boards , provided with spikes for their introduction in the tubular structure of the spars and to avoid the unexpected displacement of the same. (Machine-translation by Google Translate, not legally binding)
ES0332924A1966-10-291966-10-29Improvements introduced in flexible staircase structures. (Machine-translation by Google Translate, not legally binding)
ExpiredES332924A1
(en)