Patent ID: 6224037
Filing Date: 2001-05-01
Classification: B66F,F16G,F16H

Abstract:
A lifting device designed to transmit vertical thrust forces, enabling load to be lifted over long distances, said device comprising:a housing fitted with a rotary pinion for driving an articulated lifting column; anda lifting column having a horizontal arm and a vertical arm separated by an elbow part, said lifting column including two parallel articulated sides joined by means of transversely oriented connecting shafts cooperating with said driving pinion,each said side comprising two contiguous rows of essentially rectangular plates placed end to end in a same row and longitudinally offset one row from another, each plate having on the one hand, two main faces having holes for receiving said connecting shafts, and by means of one of which the plates of one row are applied against the plates on the contiguous row, and, on the other hand, four edge faces, namely two longitudinal edge faces, one internal, the other external relative to the elbow part of the lifting column and two side edge faces defining a front active face and a rear active face which move to bear respectively against the rear and front active faces of the adjacent plates of a same row when the section of lifting column comprising the plates is vertically extended.