Patent ID: 6253664
Filing Date: 2001-07-03
Classification: A47J

Abstract:
Infusion assembly for the automatic dispensing of beverages made from powdered coffee, comprising:a body (10) enclosing an infusion chamber (31) with a vertical axis (V) having a bottom (11) and an outlet (15);a filter plate (36) movably mounted in said chamber via an ejection mechanism (16), and adapted to receive a presser piston (62) movably mounted along said vertical axis (V); anda single-acting hydraulic jack having a piston (35) which is connected to said presser piston and can pass from a rest position to a working position, under the influence of a liquid under pressure, in which working position, the presser piston is in compression in the chamber;said piston (35) being returned to its rest position by a compressible and extensible means (34-134);said hydraulic jack comprising a cylinder (18) closed at its ends by an upper plug (28) and a bottom (19) and through which slide respectively an upper rod (65) connected by an arm (101) to the presser piston (62) and a lower rod (38) connected to the ejection mechanism (16);said upper and lower rods being secured to a piston head mounted slidably in the cylinder (18) and movable between the rest position in which the head can be pressed by the pressure of a liquid introduced through a conduit (71) provided in the plug (28), and the working position in which the head can be pressed toward the upper position by the compressible and extensible means arranged below the piston head.