ES231795A1 - Some improvements in express coffee machines. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Improvements in the espresso machines, which basically affect the organs of activation and distribution of the boiling water under pressure on the rations or doses of ground coffee in the sense that with a single control, represented by a pulsator of elastic reaction carried out successively, ordered and automatically, the expulsion of the engine fluid by the own pressure of the hot water coming from the boiler and consequent formation of the infusion of the dosed coffee, by the admission of new fluid under pressure from the coffee boiler itself or from another third party, with the consequent closure of water from the boiler; meeting for it jointly and in combination in an organic unit the following elements and conditions: A) a cylindrical body, in two coaxial parts of different diameters, connected and joined by plates, bolts and gasket, the lower and smaller of which has a side tube with automatic valve for the admission and retention of hot water from the boiler-coffee machine to effect the infusion; and the upper and larger form an upper box for the piston rod guide and for the intake and retention valve of the engine fluid; and lateral and diametrically opposed boxes for supporting and guiding the organs joined with the single handle, with which the movement of the pistons is conditioned, and for a spring that ensures the recoil of these organs and the control button; B) a double piston formed by a single piece with two cylindrical steps of different diameters, with a lower insert of a smaller diameter for the admission and delivery of the water to the coffee doser; with an upper adjustable rod with annular seal and needle to actuate the ball valve for retention of the motor fluid; C) a rigid organization, diametrically transverse, with respect to the upper and larger cylinder, integral with the control button, subject to the reaction of a return spring, comprising an exhaust valve and a stopper for retention or release, according to be its position, of the upper stem of the piston. (Machine-translation by Google Translate, not legally binding)