Patent ID: 8015990
Filing Date: 2011-09-13
Classification: A61M,Y10T

Abstract:
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.