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Priority to ES1980253310UpriorityCriticalpatent/ES253310Y/en
Publication of ES253310UpublicationCriticalpatent/ES253310U/en
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Publication of ES253310YpublicationCriticalpatent/ES253310Y/en
Improved hinge for the folding of ladders, essentially characterized in that it is constituted by the upper beams corresponding to the two flights of stairs, whose crossbars on their adjacent sides incorporate antagonistic means of articulation consisting of a cylindrical body incorporated in the profile that defines the crosspiece by means of a continuous radial extension, said cylindrical body being partially enclosed by an open clamp emerging from the corresponding side of the profile defining the opposite cross-member, with the particularity that the opening of the clamp determines the opening and closing angle between the legs. Two flights of stairs. (Machine-translation by Google Translate, not legally binding)
ES1980253310U1980-10-031980-10-03
PERFECTED HINGE FOR THE FOLDING OF HAND STAIRS
ExpiredES253310Y
(en)