Patent ID: 7011650

Claim:
A multiple-dose syringe comprising: a barrel having a closed end and an open end, the closed end having an injection port; a plunger having a first end and a second end; and a container having a collapsible shell, the collapsible shell having a first end and a second end and defining a first cavity for holding a first dose of a fluid, the first end having an opening, the opening being selectively sealed by a closure member including a valve, the valve opening in response to a fluid pressure differential across the valve, the container slideably positioned within the barrel with the first end having the opening in closer proximity to the injection port of the barrel than the second end, the second end of the container being connected to the first end of the plunger, the container being movable by the plunger from a first drawn position with the first end of the collapsible shell being a distance away from the injection port to a compressed position with the opening in the first end adjacent to the injection port of the barrel, the first end of the collapsible shell of the container and the barrel defining a second cavity for holding a second dose of a fluid, which second dose is expelled through the injection port when the container is moved from the drawn position toward the compressed position by the plunger.