Patent ID: 8905385

Claim:
A device for diffusion of gas into liquid comprising: an outer housing of hollow frustum shape having a central axis, said axis extending from a small diameter liquid outlet end, defining a liquid outlet opening, to a large diameter end; a liquid inlet port formed in said housing and defining a liquid inlet opening for delivery of liquid into said hollow housing; a helically cut conical member having an inner curvature positioned and affixed within the hollow center of the housing with its axis aligned with that of the hollow frustum shape such that liquid delivered into the housing forms a swirling motion around the outside of the member as it passes from said liquid inlet opening to said liquid outlet opening, said housing having a gas inlet for delivery of gas to the liquid within the housing as it moves from said inlet opening to said liquid outlet opening, and the housing being sealed at its large diameter end and the liquid inlet port being positioned adjacent said large diameter end.