Control for progressive cavity pump
AssigneeHy-Flex Corp.
InventorErnest B. Mills
Life of this patent
Estimating the term…
Abstract
A progressive cavity pumping system includes a pump housing, a rotor member operatively received in the pump housing, a prime mover coupled to the rotor member for driving the rotor member in first and second directions and a controlling means for actuating the prime mover, wherein the controlling automatically causes the rotor member to be driven in the second direction after shut down or idling of the pumping system. A method of operating the pumping system includes automatically driving the rotor member in a second direction after initiating shut down or idling of the pumping system and prior to start up of the same.
Claims13
A pumping system for use in pumping an associated aggregate material, comprising:
- a pump housing having a material inlet and a material outlet, wherein said pump housing defines a cavity having first and second regions, wherein said first region is juxtaposed to said material inlet, and wherein said second region is juxtaposed to said material outlet;
- a rotor member operatively received at least partially within said pump housing, said rotor member being selectively rotatable with respect to said pump housing, wherein when said rotor member is driven in a first direction said associated aggregate material is pressurized in said second region with respect to said first region, and wherein when said rotor member is arrested from being driven in a first direction said associated aggregate material in said second region remains pressurized with respect to said first region;
- a prime mover operatively coupled to said rotor member for use in driving said rotor member in first and second directions;
- controlling means operatively communicated to said prime mover, wherein when said controlling means is disengaged said pressure of said associated aggregate material in said second region is substantially reduced with respect to said first region.
A method for operating a pumping system, wherein the pumping system is for use in dispensing an aggregate material, the steps comprising:
- providing a pumping system comprising:
- pump housing having a material inlet and a material outlet, wherein the pump housing defines a cavity having first and second regions, wherein the first region is juxtaposed to the material inlet, and wherein the second region is juxtaposed to the material outlet,
- a rotor member operatively received at least partially within the pump housing, the rotor member being selectively rotatable in first and second directions with respect to the pump housing, wherein when the rotor member is driven in the first direction the associated aggregate material is pressurized in the second region with respect to the first region, and wherein when the rotor member is arrested from being driven in the first direction the associated aggregate material in the second region remains pressurized with respect to the first region,
- a prime mover operatively coupled to the rotor member for use in driving the rotor member in the first and second directions;
- controlling means operatively communicated to the prime mover;
- engaging the controlling means to drive the rotor member in a first direction;
- selectively disengaging the controlling;
- and,
- automatically driving the rotor member in the second direction for a predetermined amount of time.
Dependencies are inferred from the claim text.