Coaxial pumping apparatus with internal power fluid column
AssigneeRichard F. McNichol
InventorsNorm Fisher, Richard Frederick McNichol
Life of this patent
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Abstract
A pump having an increased energy efficiency is provided. The pump has an internal power fluid column and a transfer piston which is reciprocatingly mounted about the power fluid column. The transfer piston defines a product fluid chamber, located above the transfer piston valve, and a transfer chamber, located below the transfer piston valve. The power fluid column has at least one passageway, which allows the fluid inside the power fluid column to be in communication with a power fluid chamber. The power fluid chamber, the transfer chamber, and the product chamber are situated coaxially about the power fluid column.
Claims21
A pumping apparatus, comprising:
- a housing;
- a first inlet disposed within the housing, the first inlet having an inlet valve;
- an outlet disposed within the housing;
- an internal power fluid column disposed within the housing, the internal power fluid column having a second inlet;
- and
- a transfer piston reciprocatingly mounted about the power fluid column, the transfer piston slidably and sealingly extending between the power fluid column and an interior wall of the housing;
- a product fluid chamber positioned above the transfer piston and at least partially defined by the interior wall of the housing;
- a transfer chamber positioned below the transfer piston and at least partially defined by the interior wall of the housing;
- a sealable channel in the transfer piston fluidly connecting the product fluid chamber and the transfer chamber, the sealable channel having a transfer piston valve;
- and
- at least one passageway fluidly connecting the power fluid column with a power fluid chamber.
Dependencies are inferred from the claim text.