A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/84
A61M 5/00 (2006.01) A61M 5/28 (2006.01) A61M 5/315 (2006.01) A61M 5/31 (2006.01)
Patent
CA 1262327
TWO-COMPONENT MEDICATION SYRINGE ASSEMBLY ABSTRACT OF THE DISCLOSURE A two-component syringe assembly includes an elongate barrel having a chamber for retaining fluid and a distal end having a passageway there- through communicating with the chamber. A bypass stopper is slidably positioned in fluid-tight engagement inside the barrel. The barrel also includes a bypass defining a bypass zone positioned along the barrel for allowing fluid to flow around the bypass stopper when the bypass stopper is positioned intermediate the ends of the barrel in the bypass zone. A stopper is slidably positioned in fluid tight engagement inside the barrel. A rigid plunger rod having an elongate body portion engages the stopper to facilitate its operation. A barrier flange is positioned on the body portion and intermediate the ends thereof. The barrier flange projects outwardly from the body portion into the space between the inside wall of the barrel and the outside of the body portion for acting as a barrier for blocking the path of fluid which may be propelled in a distal direction through the bypass when the syringe is being operated. The area described by the barrier flange as viewed along the longitudinal axis of the plunger rod is at least about 87 percent as large as the area described by the interior of the barrel as viewed along the longitudinal axis of the barrel.
502434
Becton Dickinson And Company
Gowling Lafleur Henderson Llp
Szwarc Joseph M.
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