Patent ID: 8118056

Claim:
A mixing device for mixing substances, comprising: a valve seat disk; and a valve control disk arranged parallel to the valve seat disk that controls the mixing, wherein the valve seat disk comprises at least two groups of openings and each group of the openings comprises at least three openings, wherein for the each group of the openings, a first opening is an inlet opening or an outlet opening for the substances, a second opening connects to a mixing path for the substances, and a third opening bridges the mixing path, wherein for the each group of the openings, at least one side of the valve control disk comprises a first recess between the first opening and the second opening and a second recess between the first opening and the third opening, wherein for the each group of the openings, a flow of the substances passes via the first recess and via the second recess, wherein for the each group of the openings, the valve control disk is set relative to the valve seat disk so that the first opening is superimposed by the first and the second recesses and a superimposed surface area of the first opening remains constant, wherein a total superimposed surface areas of the first openings of the at least two groups of the openings superimposed by the first recesses remains constant, and wherein a total superimposed surface areas of the first openings of the at least two groups of the openings superimposed by the second recesses remains constant.