Patent ID: 7727183
Filing Date: 2010-06-01
Classification: A61M

Abstract:
1. A syringe assembly comprising: a dispensing unit including a substantially cylindrical dispensing unit body having top and bottom sealable open ends; a separate, independent plunger unit including a substantially cylindrical plunger unit body having a top open sealable end defining a joining sleeve, a bottom sealable open end, and an inner sidewall diameter that is larger than the diameter of said joining sleeve of said plunger unit body; said joining sleeve of said plunger unit body having an inner sidewall diameter which is substantially the same as an inner sidewall diameter of said dispensing unit body; a plunger disposed in the bottom open end of said plunger unit body, the plunger having a shaft and a plunger head; said plunger head having an outer diameter which is substantially the same as the inner sidewall diameter of said joining sleeve of said plunger unit body; wherein the bottom open end of said dispensing unit is adapted and configured for coaxial locking engagement with the top open opening of said plunger unit to form a multi-unit syringe assembly; and wherein said plunger head seals said plunger unit when it sealingly engages said joining sleeve of said plunger unit body, and allows two-way flow communication between said dispensing unit and said plunger unit when said plunger head is retracted into the plunger unit body and disengages from said joining sleeve of said plunger unit body.