Patent ID: 7699289

Claim:
A valve comprising: a housing having a fluid inlet for receiving a flow of compressed fluid and a fluid outlet; a flow duct mounted movably with respect to the housing, the duct having a fluid inlet for receiving a flow of compressed fluid and a fluid outlet, the fluid outlet being positioned around at least a part of the circumference of the duct, the fluid outlet being dimensioned to provide a different flow rate at different sections around the circumference of the duct; the fluid outlet of the housing being alignable with a portion of the fluid outlet of the duct; and, a drive element for moving the duct with respect to the housing such that a desired portion of the fluid outlet of the duct aligns with the fluid outlet of the housing; wherein the fluid inlet of the duct is positioned around the circumference and in an end face of the duct at a position spaced along the duct from the fluid outlet.