A ferrule for use as a medical device which makes mechanical connection with external connector tubes is provided; the ferrule comprises an inner wall defining a conduit extending between an inlet opening and an outlet opening; a first taper lock surface is defined by a first region of the inner wall...http://www.google.fr/patents/US5234417?utm_source=gb-gplus-shareBrevet US5234417 - Enternal tube incorporating a ferrule
