Patent ID: 6117113
Filing Date: 2000-09-12
Classification: A61L,A61M

Abstract:
For use with a syringe barrel having a female thread at a distal end thereof, a plunger at least partially within the barrel and adapter engagement structure on a distal end portion of the plunger, an adapter comprising:an adapter body having a male thread for releasable threaded engagement with the female thread at the distal end of the barrel to releasably secure the adapter and the barrel to one another and enable withdrawal of the adapter body into the barrel;said adapter body having a central axial passageway for passing fluid between respective proximal and distal end portions thereof;a plunger engagement structure on a proximal end portion of said adapter body for engagement with the adapter engagement structure on the distal end portion of the plunger, said plunger engagement structure including connective and drive surfaces, said connective surfaces including one of a generally radially extending rib or groove for engagement with a generally complementary-shaped groove or rib, respectively, of the adapter engagement structure of the plunger for withdrawing the adapter body into the barrel upon release thereof from the barrel;said drive surfaces including a plurality of generally axially extending circumferentially spaced surfaces for engagement by generally complementary-shaped drive surfaces, respectively, of the adapter engagement structure of the plunger and rotating said adapter body relative to the barrel to unscrew the adapter body from the barrel in response to joint rotation of the plunger and adapter body relative to the barrel.