Patent ID: 8646378
Filing Date: 2014-02-11
Classification: A47J

Abstract:
1. A brewing device for a coffee machine, comprising arranged along a common cylinder axis a brewing cylinder with a cylindrical bore, an upper piston and a lower piston, by means of which the brewing cylinder is able to be closed off to form a brewing chamber, the brewing cylinder and the pistons being displaceable relative to one another and drivable in an axial direction along the cylinder axis, and a surface of the upper piston and of the lower piston facing the brewing chamber being provided in each case with a sieve, through which hot water is able to be conducted into the brewing chamber or coffee is able to be discharged from the brewing chamber in each case via a connecting channel provided in the respective piston, wherein at least one of the sieves is installed on a supporting structure, which is insertable into one of the pistons in the axial direction, and is lockable therewith, and which supporting structure is provided with a connecting element, which is connectable in a sealed way to the connecting channel of the respective piston, wherein provided on the supporting structure is an inclined surface, and wherein held in the piston is a bolt that extends and is displaceable in the axial direction under the force of a spring, whereby a face of said bolt presses under said force of said spring against said inclined surface of said supporting structure, when said supporting structure is inserted into said piston.