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US 11,644,021 B2Granted
Screw pump and method of use
OwnerRichard William Keatchinventor
Life of this patent
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Abstract
The invention provides a fluid pump apparatus comprising a fluid inlet, a fluid outlet, a screw member and a rotatable pump member. The screw member has at least one helical screw blade configured to be rotated by a fluid flow stream and the rotatable pump member is in fluid communication with the fluid inlet and/or fluid outlet.
Claims25
A fluid pump apparatus comprising
- a fluid inlet;
- a fluid outlet;
- an outer screw member having at least one helical screw blade located on an outer surface of the apparatus configured to rotate the fluid pump apparatus around a longitudinal axis of the apparatus;
- and
- a rotatable pump member, wherein the rotatable pump member is at least one inner screw member, each at least one inner screw member having at least one helical blade;
- wherein the at least one inner screw member is in fluid communication with the fluid inlet and/or fluid outlet and wherein the outer screw member and the at least one inner screw member are rotationally coupled.
3 more elements
A method of pumping a fluid, the method comprising
- providing a fluid pump apparatus comprising:
- a fluid inlet;
- a fluid outlet;
- an outer screw member having at least one helical blade located on an outer surface of the apparatus;
- at least one inner screw member having at least one helical blade;
- wherein the at least one inner screw member is in fluid communication with the inlet and/or the outlet;
- wherein the outer screw member and the at least one inner screw member are rotationally coupled;
- exposing the apparatus to a body of moving fluid to rotate the outer screw member;
- and;
- moving the at least one inner screw member to move fluid from the fluid inlet to the fluid outlet.
7 more elements
An irrigation system or a flood control system comprising a fluid pump apparatus comprising:
- a fluid inlet;
- a fluid outlet;
- an outer screw member having at least one helical blade located on an outer surface of the apparatus;
- and
- at least one inner screw member having at least one helical blade, wherein the at least one inner screw member is in fluid communication with the fluid inlet and/or the fluid outlet;
- and
- wherein the outer screw member and the at least one inner screw member are rotationally coupled.
4 more elements
Dependencies are inferred from the claim text.