Patent ID: 7390312
Filing Date: 2008-06-24
Classification: A61M,Y10T

Abstract:
1. A method of assembling a shield system on a syringe, said syringe including a tubular barrel, a needle cannula extending from a distal end of said barrel and a stopper in said barrel, said shield system including a generally tubular body having an open proximal end, a generally tubular shield telescopically supported by said body and moveable relative to said body from a first retracted position to a second retracted position, and from the second retracted position to an extended position, a locking member and a spring biasing said shield toward said extended position, said method comprising: assembling said shield system including said body, shield, spring and locking member, with said shield in said first retracted position and interlocking said locking member with said body, thereby preventing inadvertent release of said shield to said extended position prior to receipt of said syringe in said shield system; and inserting said syringe in said shield system through said open proximal end of said body, thereby releasing said locking member from said body and permitting actuation of said shield system and extension of said shield to said extended position enclosing said needle cannula, whereby, activation of a plunger rod of the syringe causes movement of said locking member to cause said shield to move from said first retracted position to said second retracted position, and release of the plunger causes movement of said locking member to cause said shield to move from said second retracted position to said extended position.