Patent ID: 6117112
Filing Date: 2000-09-12
Classification: A61M

Abstract:
A syringe assembly, comprising:an elongated, generally cylindrical barrel having a hollow interior forming a hollow nozzle located at a distal end of said barrel and opening into the interior of said barrel;a plunger slidably mounted in said barrel and forming a longitudinal cavity;a needle holder slidably mounted in said longitudinal cavity of said plunger and having a lateral arm;means defining a spiral channel on said barrel extending along a proximal end portion of said barrel for engaging said lateral arm of said needle holder and retracting said needle holder within the barrel in response to relative rotational movement between the barrel and the needle holder;said barrel including means for strengthening said proximal end portion of said barrel; andlatching means on said barrel for latching and unlatching said needle holder at a distal end of said spiral channel.