Patent ID: 7090656
Filing Date: 2006-08-15
Classification: A61B,A61M

Abstract:
1. A medical device, comprising: a hollow barrel having a forward end and a first connector; a needle assembly connectable with the hollow barrel, comprising: a biasing element biasing the needle toward the retracted position, wherein at least a portion of the biasing element is disposed within the cavity when the needle is disposed in the projecting position and the biasing element is axially displaceable relative to the hub; and a plunger displaceable in the barrel to a terminal position in which the plunger is adjacent the forward end of the barrel, said plunger having an internal cavity for receiving the sharpened tip of the needle in the retracted position and a cover on a forward end of the plunger covering the internal cavity, wherein, upon pushing a rearward end of the plunger forwardly after the plunger is in the terminal position, the cover of the plunger is removed from the end of the plunger and the needle is released from the projecting position so that the biasing element displaces the sharpened tip of the needle into the retracted position in the cavity, and wherein connection between the needle assembly and the barrel retains the hub in a substantially fixed axial position relative to the barrel during retraction of the needle.