Patent ID: 7934866

Claim:
A Mixing device for mixing a liquid, such as water, with an instant ingredient to form a beverage, the mixing device comprising: a mixing chamber; a rotor; wherein the mixing chamber comprises an inlet chamber, a rotor chamber and a pipe bend; wherein the pipe bend connects the inlet chamber to the rotor chamber; wherein the pipe bend forms a bend with, at the start of the bend, an inlet opening to the inlet chamber and with, at the end of the bend, an outlet opening to the rotor chamber; wherein the inlet opening extends in the horizontal plane; wherein the inlet chamber, at least near the bottom thereof, is funnel shaped narrowing towards the inlet opening of the pipe bend, and comprises an access opening at the top for the supply of the instant ingredient as well as an inlet mouth for the supply of water; wherein an outlet duct for discharging the mixture produced is connected to the rotor chamber; and wherein the rotor is provided in the rotor chamber; characterized in that an internal wall of the pipe bend, on the side of the outer curve, comprises a planar surface which is defined by a first direction (H) and a second direction (D); the first direction (H) extending in the horizontal direction and the second direction (D) extending at right angles to the first direction (H), at an angle to the horizontal plane and from the inlet opening to the outlet opening; the planar surface being situated perpendicularly below the inlet opening; and the upper side of the planar surface adjoining the inlet opening.