Importance

Loading Importance Indicators...

Abstract

The brewing device comprises a brewing cylinder (9) with a cylindrical bore (10), in which a lower piston (8) is disposed freely moveable and longitudinally displaceable. An upper piston (7) is rigidly connected to a frame (1). Parallel to the vertically disposed brewing cylinder (9) there is a drive spindle (6) which has guide means (23). A drive element (24) connected to the brewing cylinder has further guide means (25) which engage with those of the drive spindle (6). By rotating the drive spindle (6) in one or the other direction, the brewing cylinder is displaced upwards or downwards. Through a pivotable hopper (12), the coffee powder is filled into the brewing cylinder. In order to establish the quantity of coffee powder inserted, the brewing cylinder is displaced upwards under time control at least until a counter force created by the upper piston (7) via the pressed coffee powder is equivalent to the drive force of the spindle In order to permit the preferred loose brewing of the coffee powder, the brewing chamber between the two pistons (7, 8) is slightly enlarged again prior to the actual brewing process. The device is characterized in particular by its simple construction with few parts subject to wear and tear, and this simple construction is aided by the omission of end switches due to the complete time control of the drive spindle.

Loading the Abstract Image...

First Claim