A port assembly includes a valve housing with an inlet opening, a valve disposed in the valve housing to control access through the inlet opening, and a base joined to the valve housing and having a bore therethrough. The bore has a closed end defined by a frangible barrier, and a pushrod is disposed...http://www.google.com.au/patents/US8172823?utm_source=gb-gplus-sharePatent US8172823 - Port assembly for use with needleless connector
