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FLOW REGULATOR FOR INFUSION PUMP AND METHOD OF MANUFACTURING THE SAME

  • US 20130081726A1
  • Filed: 10/03/2011
  • Published: 04/04/2013
  • Est. Priority Date: 10/03/2011
  • Status: Active Grant
First Claim
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1. A drug infusion flow regulating apparatus comprising:

  • an inlet configured to receive liquid into the apparatus;

    an outlet configured to discharge the liquid from the apparatus;

    a cylinder assembly comprising a first cylinder, a second cylinder and a third cylinder that are arranged substantially coaxially along an axial direction;

    the first cylinder comprising a first interior surface;

    a continuous spiral thread formed into the first interior surface of the first cylinder;

    the second cylinder fitted into the first cylinder and comprising a second interior surface and a second exterior surface;

    a spiral liquid-flow channel formed between the first cylinder and the second cylinder through the continuous spiral thread, the spiral liquid-flow channel being in fluid communication with the inlet;

    a plurality of longitudinal grooves extending substantially parallel to the axial direction and formed into the second cylinder on the side of the second interior surface;

    a plurality of through-holes formed in the second cylinder and in fluid communication with the spiral liquid-flow channel;

    the third cylinder fitted into the second cylinder and comprising a third exterior surface;

    a plurality of independent liquid-flow passages formed between the second cylinder and the third cylinder, wherein each of the plurality of independent liquid-flow passages is in fluid communication with the spiral liquid-flow channel via at least one of the plurality of through-holes; and

    a diaphragm valve configured to regulate fluid communication between the spiral liquid-flow channel and the outlet.

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