Machine for the preparation of coffee infusion

Claim 1

BREWING APPARATUS COMPRISING A WATER RESERVOIR ADAPTED STORING WATER UNDER THE PRESSURE OF AMBIENT ATMOSPHERE, FILTER MEAND ADAPTED FOR ACCOMMODATING AN INFUSIBLE POWDER, PUMPING MEANS COUPLED TO AND ADAPTED FOR PUMPING WATER FROM SAID RESERVOIR TO AND THROUGH SAID FILTER MEANS, SAID PUMPING MEANS INCLUDING AN IMPELLER AND DEFINING A PUMPING CHAMBER IN WHICH SAID IMPELLER IS LOCATED, SAID CHAMBER BEING PRIVIDED WITH AN INLET OPENING COUPLED TO SAID RESERVOIR AND AND OUTLET OPENING COUPLED TO SAID FILTER, SAID IMPELLER OCCUPYING A PORTION OF SAID CHAMBER AND LEAVING A FREE PATH BETWEEN SAID INLET AND OUTLET OPENINGS, SAID RESERVOIR AND PUMPING MEANS AND FILTER MEAND BEING CONNECTED IN SERIES TO CONSTITUTE A SYSTEM, HEATING MEANS IN SAID SYSTEM FOR HEATING SAID WATER, SAID FILTER MEANS BEING AT THE EXTREME END OF THE SYSTEM SO THAT THE WATER CAN BE DIRECTLY DISCHARGE FROM THE SYSTEM VIA SAID FILTER MEANS, SAID FILTER MEANS BEING ELEVATED ABOVE THE PUMPING MEANS ANS AT LEAST PART OF SAID RESERVOIR SO THAT WATER CAN RETURN TO THE RESERVOIR VIA THE FREE PATH IN THE PUMPING MEANS WHEN THE LATTER IS INACTIVE.