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Needleless access port valves

  • US 8,015,990 B2
  • Filed: 11/19/2007
  • Issued: 09/13/2011
  • Est. Priority Date: 11/17/2006
  • Status: Active Grant
First Claim
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1. A method for making an injection port valve comprising:

  • simultaneously mixing together at least a first compound, a second compound and a third compound to form a mixed compound, each compound provided from a different feed;

    forming a piston assembly, wherein the piston assembly comprises a slit along a top surface, a seal surface, a body section having an exterior surface, and a piston cavity, wherein the piston is made by the mixed compound to form the body section, and wherein the body section comprises a wall having a wall thickness that emits liquid silicone from within the wall to the exterior surface;

    installing the piston assembly into an interior cavity of a valve housing, the valve housing comprising a cylinder end and a valve seat;

    wherein the seal surface is seated against the valve seat; and

    wherein the first compound and the second compound form a two-part liquid silicone rubber compound; and

    wherein the third compound comprises a blend of carrier and antimicrobial agents.

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