ES178438U - Closes-doors oleohidraulico. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Oil-hydraulic closing doors, of the type that are constituted by a cylindrical vessel, closed at both ends and filled with oil, or other hydraulic fluid, inside of which and in. Against the tension of a recovery spring moves a piston that divides its cavity into two independent chambers, whose chambers communicate through two groups of holes of different section made axially in the piston itself and organized according to two concentric circular crowns, the passage of fluid being governed in both directions by means of two valve assemblies, each arranged on one side of the piston and applied to the obstruction of one of the groups of orifices, which is characterized essentially because on the internal side surface of the vessel means are provided to cooperate with the fluid passages of the piston and to accelerate the displacement thereof in the last section of its travel in favor of the recovery spring, and because said vessel has an additional chamber, for the compensation of fluid losses, with which it forms a single body that can be mounted between a swinging leaf and its frame, through an artic housings provided at one end of the cylindrical vessel, compensation chamber, and at the external end of the piston rod, respectively, the assembly of the latter being carried out through an extensible organization that allows to lengthen the length of the rod. (Machine-translation by Google Translate, not legally binding)