Flush Syringe Having Compressible Plunger
AssigneeBecton, Dickinson and Company
InventorsThomas A. Alheidt, Tracy Ray Hottovy, James J. Timko
Life of this patent
Estimating the term…
Abstract
An I.V. flush syringe assembly includes a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end with a passageway therethrough in fluid communication with the chamber. An elongate plunger having a proximal end, a distal end and a stopper is slidably positioned in fluid-tight engagement with the inside surface of the barrel for drawing fluid into and out of the chamber by movement of the stopper relative to the barrel. The plunger includes anti-reflux structure for minimizing stopper deflection when fluid has been delivered from the chamber and the stopper is being forced against the distal end of the chamber.
Claims9
1-15. (canceled)
An I.V. flush syringe assembly comprising:
- a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end including a distal wall with an elongate tip extending distally therefrom having a passageway therethrough in fluid communication with said chamber;
- and a plunger including an elongate body portion having a proximal end having a compressible portion, a distal end, and a stopper being slidably positioned in fluid-tight engagement with said inside surface of said barrel for drawing fluid into and driving fluid out of said chamber by movement of said stopper relative to said barrel, said elongate body portion extending outwardly from said open proximal end of said barrel;
- wherein deflection of said stopper is minimized when fluid has been delivered from said chamber and said stopper is in contact with said distal wall.
Dependencies are inferred from the claim text.