Patent ID: 6881202

Claim:
A needle assembly comprising: a hub having opposite proximal and distal ends and a passage extending between said ends, a projection extending outwardly from said hub; a cannula having a proximal end mounted in said passage of said hub and a distal end projecting distally from said hub; a first wing having a center sleeve rotatably and axially movable on said hub, said center sleeve having opposite proximal and distal ends and a slot extending between said ends, said slot being dimensioned to slidably accommodate said projection on said hub; and a second wing having proximal and distal sleeves disposed respectively substantially adjacent said proximal and distal ends of said center sleeve of said first wing, said proximal and distal sleeves being rotatably and axially movable on said hub, at least said distal sleeve including a slot formed therein and slidably receiving said projection of said hub, said first and second wings being rotatable relative to one another from a first position where said slots of said first and second wings are misaligned and a second position where said slots of said first and second wings are aligned for permitting axial movement of said projection of said hub from a first position where said cannula is exposed from said sleeves to a second position where said cannula is substantially shielded within said sleeves.