Patent ID: 8651011

Claim:
A brewing device for a coffee machine, comprising a brewing cylinder with a cylindrical bore and two pistons, by means of which pistons the brewing cylinder is able to be closed off to form a brewing chamber, the brewing cylinder and the pistons being held in a frame in a way displaceable relative to one another and being drivable via a drive device, which drive device comprises a spindle, both ends of which are designed as bearing pins and are rotatable borne in a sliding way in bearing rings installed in the frame, a coffee powder supply device for filling the brewing chamber with coffee powder, and a device for leading away the coffee powder cake, ejected from the brewing chamber by a piston after the brewing procedure, into a collection container, wherein inserted into at least one of the bearing rings is at least one supporting element, which is pressible substantially radially against the bearing pin by means of a spring element, wherein the supporting element is designed as a sliding member with a sliding surface, which is inserted into a recess in the bearing ring and whose sliding surface is pressible on the lateral surface of the bearing pin, wherein the recess in the bearing ring is designed as continuous bore, the external opening of which is able to be closed off with a cover, which is able to be fixed to the frame, so that the other end of the spring element is supported on said cover.