Patent ID: 6840291

Claim:
A fluid transfer adapter for use with a syringe barrel having an inside surface defining a chamber, an open proximal end and an open distal end including a collar having adapter engaging structure and a distally facing frusto-conically shaped edge including a distal surface and a proximal surface and a plunger including a stopper positioned for fluid tight engagement with said barrel comprising: a hub having a proximal end, a distal end and a conduit therethrough defining a frusto-conically shaped edge at its proximal end, and a proximally-facing frusto-conically shaped surface for mating with said distal surface of said frusto-conically shaped edge of said barrel, wherein upon mating said adapter with said syringe barrel, said frusto-conically shaped edge of said conduit aligns with said proximal surface to form a flat surface so that said stopper abuts said flat surface upon full depression of said plunger; means for threadably engaging said hub to said collar so that said frusto-conically shaped surface of said hub contacts said frusto-conical surface of said barrel; and a fluid transfer element including an elongate luer tip having a distal end, a proximal end, and a passageway therethrough, said proximal end of said luer tip being connected to said distal end of said hub so that said passageway is in fluid communication with said conduit.