An improved luer lock receiving septum having a configuration which provides rapid and tight resealing and yet allows penetration of the septum by the luer tip with a low penetration force. The elongated septum includes an upper portion of enlarged diameter having a target surface, a central slit, and...http://www.google.es/patents/US7033339?utm_source=gb-gplus-sharePatente US7033339 - Self sealing luer receiving stopcock
