Patent ID: 6527520
Filing Date: 2003-03-04
Classification: B63H,B63J,F01D,F03B,F03D,F04D,F05B,F05D,Y02E,Y02P,Y02T

Abstract:
A pumping apparatus for liquids comprising:a tube having an inner surface, an intake at a first end, and an outlet at a second end; at least one ribbon having a peripheral edge mounted to said inner surface of said tube, said ribbon being formed of coils extending in a helical manner from the first end to the second end of the tube, wherein a frequency of coils per unit length of tube decreases from the first end to the second end of the tube; means for removing contaminants centrifugally separated proximate the first end; and drive means for rotating said tube and ribbon so as to pump liquid from said first end to said second end.