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Pumping system with precise ratio output

Pumping system with precise ratio output description/claims

The disclosure is directed to a precision pumping system. More particularly, the disclosure is directed to a pumping system whose fluid output includes desired proportions of two or more input fluids.

In many fluid applications, such as chemical applications, one or more fluids must be mixed with one or more additional fluids to achieve a desired fluid mixture. Commonly, mixing one fluid with another fluid is performed by measuring out a quantity of a first fluid, measuring out a quantity of a second fluid, and combining the measured amounts in a container where the fluids are mixed together. This process is routinely performed by hand, and thus is subject to inaccuracies attributed to human error. Thus, the fluid mixture achieved may not in fact possess the precise desired proportions of the fluids. Additionally, as fluid mixtures are typically mixed in batches (i.e., discrete quantities of a fluid mixture), inconsistencies in the proportions of the mixed fluids from one batch to the next batch may be experienced.

What is desired is a pumping system which outputs a fluid mixture of two or more fluids, in which accurate and precise proportions of the fluids are maintained in the fluid mixture output from the system.

Disclosed is a precision pumping system whose fluid output includes desired proportions of two or more input fluids.

Accordingly, one illustrative embodiment is a pumping system that includes an electric motor assembly powering a first drive shaft driving a first pump at a first flow rate and powering a second drive shaft driving a second pump at a second flow rate. A proportioned fluid output includes a first fluid pumped by the first pump and a second fluid pumped by the second pump. The pumping system provides a desired ratio of the first fluid to the second fluid at the proportioned fluid output, relatively independently of pressure and flow rate at the output.

Another illustrative embodiment is a system for pumping a first fluid and a second fluid in a desired proportion. The system includes a first pump having an inlet in fluid communication with a first container for holding a quantity of the first fluid, and an outlet. The system further includes a second pump having an inlet in fluid communication with a second container for holding a quantity of the second fluid, and an outlet. The system further includes an electric motor assembly for driving the first pump at a first cycling rate and the second pump at a second cycling rate, wherein the outlet of the first pump and the outlet of the second pump are in fluid communication with an outlet of the system, sometimes through respective check valves to prevent backflow.

Yet another illustrative embodiment is a system for pumping a first fluid and a second fluid in a desired proportion. The system includes a first pump, a second pump, a third pump, a fourth pump, and an electric motor assembly. The first pump has an inlet in fluid communication with a first container for holding a quantity of the first fluid, and an outlet. The second pump has an inlet in fluid communication with a second container for holding a quantity of the second fluid, and an outlet. The outlet of the first pump and the outlet of the second pump are in fluid communication with a first stage outlet. The electric motor assembly drives the first pump at a first cycling rate and drives the second pump at a second cycling rate. The third pump has an inlet in fluid communication with the second container, and an outlet. The fourth pump has an inlet in fluid communication with the first stage outlet, and an outlet. The outlet of the third pump and the outlet of the fourth pump are in fluid communication with a second stage outlet. The third pump is driven at a third cycling rate and the fourth pump is driven at a fourth cycling rate. In some embodiments the third pump and the fourth pump are driven by another electric motor assembly.

The above summary of some example embodiments is not intended to describe each disclosed embodiment or every implementation of the invention.

The invention may be more completely understood in consideration of the following detailed description of various embodiments in connection with the accompanying drawings, in which:

FIG. 1 is a perspective view of an exemplary pump assembly;

FIG. 2 is an exploded view of the exemplary pump assembly of FIG. 1;

FIG. 3 is a view of a pump of the pump assembly of FIG. 1 illustrating the eccentric drive means of the pump;

FIG. 4 is a view of the interaction of the eccentric drive means with the electric motor and the piston of the pump of the pump assembly of FIG. 1;

FIG. 5 is an exploded view of a pump of the pump assembly of FIG. 1;

FIG. 6 is a partially cut away view of a pump of the pump assembly of FIG. 1;

FIG. 7 is a perspective view of the manifold of a pump of the pump assembly of FIG. 1;

• Provisional Patent
• Utility Patent

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