ES215189U - Perfected hydraulic crane. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improved hydraulic crane, of the type formed by a mast arm and a boom arm, joined at an angle to each other, of which the former. It is by one of its ends coupled to the respective tower, while the other side is attached to the arm pen whose free end hangs the carrier basket, characterized in that said nacelle, which includes the control mechanisms of the crane goes coupled to the boom with the possibility of tilting with respect to it and has a body as a sector from which part a tow, through a pulley existing at the junction between the boom and mast, extends to another body in solidarity sector at the end of the tower, so that when said mast is tilted, the cable adapts to the sector and, depending on its direction of rotation, determines the tilting of the nacelle controlled by the towline itself, or a pulling effect of said towline on the nacelle that swings in the opposite direction to the previous one; so that both in the ascent and in the descent of the nacelle the simultaneous tilting of the nacelle is verified, which thus remains constantly occupying a position of perfect verticality with respect to the plane of the ground, while remaining firmly locked in any of its possible positions in height, (Machine-translation by Google Translate, not legally binding)