ES308037A1 - A provision of elevating structure. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

A lifting structure arrangement including the combination of a jack unit provided with an upper head and a lower head, lower head support means, a pair of spaced apart vertical screws extending through the heads and being coupled with a load to be lifted, mechanical means between the heads having movable means vertically to lift the upper head, a pair of upper nuts, one in each screw respectively above the upper head, through which the screws are raised and the load, while the upper head is lifted, a pair of lower nuts, one on each screw respectively above the lower head, through which it supports the screws and the load, while the head descends lower, a first mechanism connected with the lower nuts to make descend to these following the beginning of each stage of ascent of the upper beaker, a second mechanism connected with the upper nuts for descending to these after the beginning of each stage of the descent of the upper head, a primary motor for actuating said mechanisms, said primary motor being provided with a movable drive alternately in directions opposite, an apparatus that couples the drive to the first mechanism for driving to this when the drive moves in one direction, and an apparatus that couples the drive to the second mechanism to drive to it when the drive moves in the opposite direction. (Machine-translation by Google Translate, not legally binding)