Patent ID: 6224588
Filing Date: 2001-05-01
Classification: A61M,B65D,F16B

Abstract:
A syringe for introduction or withdrawal of a liquid from a body, said syringe comprising:(a) a hollow needle for penetrating said body;(b) a hub receiving said needle;(c) a syringe barrel selectively engageable to said hub for receipt of said liquid;(d) an exterior thread profile including first crest and root portions on one of said hub and said barrel;(e) an interior thread profile including second crest and root portions on the other of said hub and barrel;(f) at least one flexible finger extending outwardly from within one of the first and second root portions, said at least one flexible finger having a distal end normally projecting outwardly of said one of said first and second crests; and(g) at least one outwardly extending ridge portion on the other of said hub and said barrel, said ridge portion forming a part of the root of the thread profile of said other of said hub and barrel, whereby during thread engagement movements of said connecting members, said finger is flexed in one direction by said ridge portion and during threaded disengagement movements of said members, said finger is flexed in the opposite direction by said ridge for resistance to said disengagement movements.