ES243304U - Security valve for conduction of liquids. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Safety valve for liquid pipes, comprising a housing defining a cylindrical chamber, in which a piston with a rod protruding through one of the bases of the chamber is housed, said chamber having two opposite radial mouths located next to the closed base opposite the stem outlet, to which base the piston is driven by a stationary spring, characterized in that the area of the chamber in which the mouths are located is of inverted conical configuration, with an axial channel that it runs between the bottom of the chamber and one of the mouths, the piston presenting its end portion of adjustable conical configuration on the conical surface of the chamber, to close the communication between the mouths, arranging behind this conical section of the chamber. Two parallel O-rings, and because the rod has articulated, at the end that crosses the base of the camera a lever that defines a a cam with a seat surface on said base, located at such a distance from the point of articulation that when it rests on said base, the frustoconical portion of the piston is at an intermediate point between the extreme positions of closure and total opening, falling the aforementioned lever of this position when the rod moves outwards due to the pressure exerted by the liquid in the piston. (Machine-translation by Google Translate, not legally binding)