ES470109A1 - Improvements in reversible hydraulic cylinders (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in reversible hydraulic cylinders, characterized in that they are internally constituted by an anterior chamber, through which the piston of the cylinder is displaced, and a subsequent one, both chambers being communicated by means of a conduit; the cylinder having internally in the axial direction and between the two chambers a housing in which is disposed with displacement faculty, an element or piston with its sealing gasket so that one of its end faces acts as the piston of the rear chamber while to the other an inner valve is coupled which is governed by one of the end projections of a piston displaceable in an inner chamber of said element; the maximum displacement of the piston of the cylinder is produced when the oil presses into the inner chamber of the element, displacing the piston on the valve, opening it, and facilitating the passage of oil from the inner chamber when the piston is displaced by pressure that arrives by an external conduit to the head of the cylinder, so that the oil that passes through the valve and reaches the interior chamber of the element leaves a return circuit, all this, until the pressure in the anterior chamber begins to be lower than that of the rear chamber, at which time the oil will start moving in the opposite direction through the conduit that communicates them, at the same time the piston backs off the valve closed and the corresponding extreme portion of the element closes the oil outlet. (Machine-translation by Google Translate, not legally binding)