Brewing apparatus for a coffee machine

Abstract

A brewing apparatus () for a coffee machine comprises a brewing cylinder () with a cylindrical bore and an upper piston and a lower piston (), by means of which the brewing cylinder () is able to be closed off in order to form a brewing chamber. The brewing cylinder () and the pistons are held in a frame () in a way displaceable relative to one another, and are drivable via a spindle (). Interacting with the spindle is a threaded part () which is arranged on a driven part () fitted on the brewing cylinder (). A coffee-powder-feed device is provided for filling the brewing chamber with coffee powder, and a stripping element () serves for stripping off the coffee-powder cake which remains on the surface () of the bottom piston () following the brewing operation. The rear-side surface () of the stripping element () is provided with a protrusion () which is arranged on the region directed towards the piston surface () and which has at least one deflecting surface () which is inclined in relation to the stripping-off direction. Residues of coffee powder which can accumulate behind the stripping element () can be conveyed away laterally by this inclined deflecting surface, it being ensured that the stripping element can reach the rest position.