Patent ID: 6776777
Filing Date: 2004-08-17
Classification: A61M,Y10T

Abstract:
A shield system for a syringe, the syringe including a tubular barrel, a needle cannula extending from a distal end of the barrel, a stopper in the barrel, a plunger extending from the stopper through an open proximal end of the barrel and a thumb pad at a proximal end of the plunger, said shield system comprising:a generally tubular body having open proximal and distal ends and said open proximal end having means for securing the syringe in said body, said body having a radial surface defined therein; a generally tubular shield having a radial portion releasably supported on said radial surface and being telescopically movable from a first retracted position in which the needle cannula is exposed, to a second retracted position which is axially spaced from said first retracted position and in which the needle cannula is exposed, to an extended position in which the needle cannula is enclosed; an annular member in said open proximal end of said body moveable axially in said body, distal axial movement of said annular member releasing said tubular shield from said first retracted position and securing said tubular shield in said second retracted position, proximal axial movement of said annular member releasing said tubular shield from said second retracted position and enabling said tubular shield to move to said extended position; and a spring between said annular member and said tubular shield for biasing said tubular shield toward said second retracted position and said extended position.