Fluid flow machine

Claim 1

A FLUID FLOW MACHINE OF THE CROSS-FLOW TYPE COMPRISING A HOLLOW CYLINDRICALLY BLADED ROTOR MOUNTED FOR ROTATION ABOUT ITS AXIS WHEREIN SAID BLADES ARE CONCAVE IN THE DIRECTION OF ROTATION WITH THEIR OUTER EDGES LEADING THEIR INNER EDGES; CIRCUMFERENTIALLY SPACED INLET AND OUTLET GUIDE WALL SURFACES EXTENDING THE AXIAL LENGTH OF SAID ROTOR AND FORMING A SIDE WALL OF AN INLET DUCT AND A SIDE WALL OF AN OUTLET DUCT; VORTEX FORMING AND STABILIZING MEANS EXTERIOR OF SAID ROTOR HAVING A GUIDE PORTION EXTENDING BETWEEN THE GUIDE SURFACES FORMING THE EXIT DUCT AND THE INLET DUCT WHICH WHEN THE MACHINE IS OPERATED GUIDES A PORTION OF THE FLOW FROM THE EXIT DUCT BACK TOWARDS THE INLET DUCT IN THE SAME DIRECTION OF ROTATION OF SAID ROTOR TO FORM AND STABILIZE A FLUID VORTEX WHICH EXTENDS THE LENGTH OF THE ROTOR AND WHICH HAS A CORE INTERPENETRATING THE PATH OF THE ROTATING BLADES WHEREBY FLUID WILL FLOW FROM A SUCTION SIDE OF SAID MACHINE INTO THE ROTOR THROUGH THE PATH OF THE ROTATING BLADES AND THENCE OUT OF THE ROTOR THROUGH THE PATH OF THE ROTATING BLADES TO THE EXIT DUCT IN A PLANE TRANSVERSE TO THE ROTOR AXIS AND WHEREBY A MAJOR PART OF THE FLUID FLOWING THROUGH SAID MACHINE PASSES THROUGH THE ROTOR ADJACENT SAID CORE; AND MOVABLE FLOW CONTROL MEANS POSITIONED ON THE SUCTION SIDE OF SAID MACHINE AND IN ONE POSITION BEING FLUSH WITH SAID INLET GUIDE SURFACE AND IN ANOTHER POSITION EXTENDING TRANSVERSELY OUTWARDLY FROM SAID INLET GUIDE SURFACE TO CONTROL FLOW OF THE MAJOR PART OF FLUID PASSING ADJACENT SAID CORE FROM THE INTAKE SIDE OF THE FLUID FLOW MACHINE TO THE DISCHARGE SIDE THEREOF WHEREBY THE THROUGHPUT OF SAID MACHINE MAY BE REGULATED.