Patent ID: 6193696
Filing Date: 2001-02-27
Classification: A61M

Abstract:
A medical device, comprising:a barrel having proximal and distal ends, with the proximal end having a barrel flange;a tube secured about the barrel, the tube having a collar positioned adjacent the distal end of the barrel, the collar having an edge;said tube includes a tube flange and an upper proximal collar spaced apart from said tube flange and supported on the flange, so that as said barrel is inserted into the tube, the barrel flange comes in contact with the tube collar causing the collar to flex as the barrel flange travels past said collar and once past the collar, the collar is resilient enough to return to a resting positiona shield mounted about said tube and axially movable between a retracted position, wherein the distal end of the barrel is exposed, and an extended position, wherein the distal end of the barrel is covered, the shield having a proximal end, a distal end, and a circumferential sidewall therebetween, the circumferential sidewall having an outside surface and an inside surface; anduser-activatable locking means to secure the shield in the extended position, the user activatable locking means including:at least one deflectable arm having a distal end mounted with the circumferential sidewall and a proximal end deflectable towards the interior of the shield, said at least one arm having a free position wherein the arm is substantially coplanar with the circumferential sidewall of the shield, and a locking position, wherein the arm is deflected towards the interior of said shield so that the proximal end is positioned towards the interior of the shield;at least one stop member mounted to the interior surface of the shield adjacent the proximal end of the shield to define a gap between the stop member and the proximal end of the deflectable arm; anda ring axially slidable around the outside surface of the shield between a first position wherein the ring is spaced away from the at least one deflectable arm and a second position wherein the ring is positioned against said at least one deflectable arm to secure the arm in the locking position.