Patent ID: 7300420
Filing Date: 2007-11-27
Classification: A61M

Abstract:
1. A passive needle guard, comprising: a body having a cavity therein for receiving a medicine cartridge having a distal end for administering a medication from within the cartridge and having a plunger; a shield slidably attached to the body, the body being biased by a spring to move with respect to the shield from a first position wherein the distal end of the cartridge is exposed toward a second retracted position for withdrawing the distal end of the cartridge into the shield; cooperating members on the body and the shield for holding the body and shield in the extended position; and a member near the a proximal end of the shield, the member being deflectable for disengaging the cooperating members upon predetermined movement of the plunger of the medicine cartridge, whereby the body and shield move relative to one another and the shield extends.