Fluid moving device

Claim 1

IN A FLUID MOVING DEVICE, A ROTATABLY MOUNTED HUB MEMBER; A PLURALITY OF NON-RESILIENT FLEXIBLE VANES CARRIED BY SAID HUB; A CASING SURROUNDING SAID HUB FORMING A GENERALLY ECCENTRIC CHAMBER WITH RESPECT TO THE AXIS OF ROTATION OF SAID HUB, SAID CASING AND HUB COACTING TO PROVIDE A CONSTRICTED CHAMBER PORTION ON ONE SIDE OF THE HUB HAVING COMMUNICATION AT THE FIRST END THEREOF IN THE DIRECTION OF HUB ROTATION WITH A FLUID OUTLET AND AT THE OTHER END THEREOF WITH A FLUID INLET, WHEREBY VANES LEAVING THE CONSTRICTED CHAMBER PORTION MAY ASSUME A SUBSTANTIALLY RADIAL DIRECTION UNDER THE ACTION OF CENTRIFUGAL FORCE UPON ENTERING THE INLET, SAID VANES BEING DIMENSIONED WITH RESPECT TO SAID CASING SUCH THAT WHEN IN SAID RADIAL POSITION SAID VANES ARE SPACED FROM SAID CASING AT THE DISTAL ENDS THEREOF, AND A BENT POSITION UNDER THE ACTION OF FLUID PRESSURES ADJACENT THE OUTLET BEFORE ENTERING THE CONSTRICTED PORTION, SAID VANES BEING HELD BY FLUID PRESSURE AWAY FROM SAID CASING WHEN IN SAID BENT POSITION, WHEREBY SAID VANES CLEAR SAID CASING DURING ALL ROTATIONAL POSITIONS THEREOF.