Patent ID: 8419682

Claim:
A syringe comprising: a barrel comprising a gripping flange at a proximal end, an opening at a distal end for receiving a needle hub, a wall structure comprising an exterior surface and an interior surface defining an interior cavity and having a shoulder, and two female detents on the interior surface positioned closer to the distal end than the proximal end; a plunger disposed in the interior cavity of the barrel, the plunger comprising a push flange at a proximal end, and a tip holder comprising a perimeter defining an opening for receiving, at least in part, a carriage and a plunger tip mounted thereon; wherein said plunger tip comprises a plunger tip distal end surface spaced apart from the push flange by a first distance; wherein the carriage comprises a Luer tip, a passage, two legs extending away from the Luer tip and proximally of the shoulder, each leg comprising a male detent; wherein the carriage is removably secured to the barrel by engaging the male detents on the carriage with the female detents on the barrel; and wherein the plunger comprises three plunger positions including a first plunger position in which the plunger tip positioned on the plunger is spaced apart from the carriage; a second plunger position in which the plunger tip or tip holder holding the plunger tip contacts the carriage and the two legs move into the opening of the tip holder but the male detents do not separate from the female detents; and a third plunger position in which the push flange on the plunger moves a distal direction relative to the plunger tip distal end surface such that the push flange is now spaced apart from the plunger tip distal end surface by a second distance, which is less than the first distance, and the male detents separate from the female detents.