Patent ID: 7530974

Claim:
A port closure system for use with a fluid container having a fluid port, comprising: a reseal housing adapted to seal the fluid port in closed condition, the reseal housing having a base face adapted to be associated with the fluid port and an interior face adapted to face outwardly from the fluid port, an open cylinder extending from the interior face to the base face and having an upper rim, and a diaphragm connected to the open cylinder to seal the open cylinder closed to fluid flow; a cap assembly connected to the reseal housing, the cap assembly including an under shell shaped to mate with the interior face of the reseal housing to seal the interior face, a removable cap which provides access to a sealed opening located over the interior face, and a retaining rim extending from the under shell around the sealed opening; and a reseal element positioned between the under shell and the interior face of the reseal housing, the reseal element mechanically retained in place by the retaining rim and the upper rim of the open cylinder, wherein the reseal element includes a central core, an annular shoulder, and a lip element, and wherein a portion of the central core is frictionally fitted into the open cylinder of the reseal housing to provide resealing forces on the reseal element.