Brewing arrangement for a coffee maker

• US 20060090652A1
• Filed: 10/11/2005
• Published: 05/04/2006
• Est. Priority Date: 11/04/2004
• Status: Abandoned Application

• Current Assignee: Niro-Plan AG
• Original Assignee: Niro-Plan AG
• Inventors: Greiwe, Hansdieter
• Application Number:
  US11/247,454
• Publication Number:
  US 20060090652A1
• Time in Patent Office: Days
• US Class Current: 99/279
• CPC Class Codes: A47J 31/002 following a specific operational sequence, e.g. for improving the taste of the extraction product
• CPC Class Codes: A47J 31/18 Apparatus in which ground coffee or tea-leaves are immersed in the hot liquid in the beverage container
• CPC Class Codes: A47J 31/32 with hot water under air pressure

Abstract

A brewing arrangement (1) is provided for a coffee maker with a brewing cylinder (2) with a vertical cylinder axis, which can be sealed by a lower piston (5) and an upper piston (4). According to the invention, the lower piston and the upper piston are coupled to each other to form a double piston (3) and therefore can be moved together.

Claims

1. Brewing arrangement for a coffee maker comprising a brewing cylinder (2) with a vertical cylinder axis, which can be sealed by a lower piston (5) and an upper piston (4), the lower piston and the upper piston form a double piston, with the pistons being set with a fixed spacing relative to each other and moving together.

2. Brewing arrangement according to claim 1, wherein the double piston (3) is moveable between at least an upper coffee grounds dosing position (II), a middle brewing position (I), and a lower coffee ejection position (III).

3. Brewing arrangement according to claim 2, wherein the double piston (3) generally seals a partial area of the brewing cylinder (2) acting as a brewing chamber (6) at a top and bottom thereof in the brewing position (I).

4. Brewing arrangement according to claim 2, wherein the double piston (3) generally seals the brewing cylinder (2) at the top and the bottom in the coffee grounds dosing position (II).

5. Brewing arrangement according to claim 1, wherein the brewing cylinder (2) has a coffee grounds filling opening (17) that is sealable by the double piston (3).

6. Brewing arrangement according to claim 1, wherein the double piston (3) can move downwardly at least partially out of the brewing cylinder (2) into the coffee ejection position (III) for ejecting used coffee grounds (C).

7. Brewing arrangement according to claim 6, wherein a scraper (21) is arranged and can be activated in an area underneath the brewing cylinder (2).

8. Brewing arrangement according to claim 5, wherein the brewing cylinder (2) has a cleaning agent filling opening (24), which is arranged in a peripheral area above the coffee grounds filling opening (17).

9. Brewing arrangement according to claim 8, wherein the double piston (3) can move upwardly into a cleaning agent dosing position above the coffee grounds dosing position (II).

10. Brewing arrangement according to claim 1, wherein the lower piston (5) includes a filter element (14), through which the brewed coffee can be filtered, and that in the lower piston, underneath the filter element there is a coffee collection chamber (15) connected to a coffee outlet line (13) for the filtered coffee.

11. Brewing arrangement according to claim 10, wherein the coffee outlet line (13) runs upwards through the upper piston (4) from the coffee collection chamber (15) arranged in the lower piston (5).

12. Brewing arrangement according to claim 1, wherein the upper piston (4) includes a brewing water inlet opening (10) and/or a water distributing element (11).

13. Brewing arrangement according to claim 1, wherein the upper piston (4) has an air inlet opening (16) for filtering the brewed coffee via use of compressed air and steam and for drying the used coffee grounds.