A valve for a needleless syringe fitting is disclosed. The valve has a receptacle fitting for releasable attachment to the syringe fitting, a valve chamber, a valve seat adjacent the chamber, and elastomeric sealing bowl within the chamber. The bowl is deformed and partially inverted when the syringe...http://www.google.com.au/patents/US5569235?utm_source=gb-gplus-sharePatent US5569235 - Valve and valved container for use with a syringe fitting
