Ejector and method of controlling same

Claim 1

An adjustable ejector for adjustably controlling fluid flow conditions resulting from fluid flow through the ejector comprising: an ejector housing having therein a motive inlet including an inlet nozzle, a suction inlet, and a mixing and outlet zone wherein mixing of fluid from said motive inlet and said suction inlet occurs and then exits from the ejector, including a mixing throat; adjustment means for varying the fluid presentation size of said inlet nozzle and of said mixing throat such that fluid flow conditions with respect to said motive inlet, suction inlet, and mixing and outlet zone can be controlled thereby, said adjustment means including an adjustable fluid path structure disposed in each of said inlet nozzle and said mixing throat, said adjustable fluid path structure of said inlet nozzle comprising; an inflatable torus capable of inflation and deflation by hydraulic fluid and disposed for receiving and conveying fluid passing into and through said inlet nozzle; an hydraulic conduit extending from said hydraulic torus for conveying hydraulic fluid to and from said torus; and means for pumping hydraulic fluid through said conduit to and from said torus for inflating and deflating said torus.