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Abstract

An apparatus including a mixing chamber for mixing together pressurized gaseous and liquid constituents, the mixing chamber including a lower region and an upper region; separate feed connections for the pressurized constituents of a mixture to be formed; a discharge connection for discharging a formed mixture to a chamber, wherein at least one of the separate feed connections includes passages in a wall of the mixing chamber; a spring located in the lower region of the mixing chamber biased against a pressure element located in the upper region of the mixing chamber, wherein the pressure element and an inner wall of the upper region of the mixing chamber define an annular space around the pressure element, wherein the passages comprise a porous part in the wall of the mixing chamber that open into the annular space around the pressure element in the upper region of the mixing chamber, and comprises an inlet for a pressurized gaseous constituent; and wherein the lower region of the mixing chamber comprises an inlet for a pressurized liquid component.

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First Claim