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System and method for proportional mixing and continuous delivery of fluids

  • US RE45,717 E1
  • Filed: 04/24/2014
  • Issued: 10/06/2015
  • Est. Priority Date: 10/30/2007
  • Status: Active Grant
First Claim
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1. A system for mixing and delivering fluids, comprising:

  • a first fluid source configured to supply a first fluid;

    at least a second fluid source configured to supply at least a second fluid;

    a first fluid line in configured for fluid connection with the a first fluid source for supplying a first fluid;

    at least a second fluid line in configured for fluid connection with the an at least second fluid source for supplying at least a second fluid;

    a pump having an inlet and an outlet; and

    a mixing stopcock valve having a first input port, at least a second input port, an outlet port, and a stopcock actuator,wherein the first input port is in fluid communication with the first fluid line, the at least second input port is in fluid communication with the at least second fluid line, and the outlet port is in fluid communication with an the inlet of the pump,wherein the stopcock actuator comprises an internal conduit defining a first conduit portion, a second conduit portion, and a third conduit portion of reduced diameter relative to the diameter of the first conduit portion, andwherein a positional change in the a position of the stopcock actuator provides a change in the a fluid mixture ratio of the first and at least second fluids delivered to a patient.

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