Self-capping syringe assembly with one-way valve

Abstract

A syringe assembly is disclosed which includes a syringe body defining a fluid reservoir, a plunger assembly including a plunger rod and a sealing member supported on the plunger rod, and a luer cap releasably secured to a distal end of the syringe body. The luer cap includes a luer-type connector member and a fluid outlet. A one way valve is supported within the fluid outlet of the luer cap to prevent flow from the fluid outlet back into the fluid reservoir of the syringe body.

1 - 15 . (canceled) 
     
     
         16 . A luer cap comprising:
 an outer body portion configured and dimensioned to frictionally and releasably engage a distal end of a syringe body, an inner body portion spaced from the outer body portion defining a fluid outlet, a luer type connector member positioned between the outer cylindrical body portion and the inner body portion adapted to engage an I.V. catheter assembly, and a one way valve supported within the fluid outlet.   
     
     
         17 . The luer cap according to  claim 16 , further including a helical-type coupling member formed on the outer cylindrical body portion. 
     
     
         18 . The luer cap according to  claim 17 , wherein the helical-type coupling member is positioned within an annular channel defined between the outer cylindrical body portion and the inner body portion. 
     
     
         19 . The luer cap according to  claim 16 , wherein the inner body portion has a tapered outer surface. 
     
     
         20 . The luer cap according to  claim 16 , wherein the one way valve includes a duckbill type valve. 
     
     
         21 . The luer cap according to  claim 16 , wherein the one way valve is positioned and configured to allow fluid to flow from the outlet opening upon an increase in pressure within the fluid reservoir. 
     
     
         22 . The luer cap according to  claim 16 , wherein the one-way valve is positioned and configured to move to an open position in response to an increase in pressure within the one way valve. 
     
     
         23 . A self-capping syringe assembly comprising:
 a syringe body defining a fluid reservoir and an outlet opening;   a plunger assembly including a plunger rod and a sealing member supported on a distal end of the plunger rod; and   a luer cap including an outer body portion configured and dimensioned to frictionally and releasably engage a distal end of the syringe body, an inner body portion spaced from the outer body portion defining a fluid outlet, a luer type connector member positioned between the outer body portion and the inner body portion adapted to engage an I.V. catheter assembly, and a one way valve supported within the fluid outlet.   
     
     
         24 . The self-capping syringe assembly according to  claim 23 , wherein the luer cap further includes a helical-type coupling member formed on the outer body portion. 
     
     
         25 . The self-capping syringe assembly according to  claim 24 , wherein the helical-type coupling member is positioned within an annular channel defined between the outer body portion and the inner body portion. 
     
     
         26 . The self-capping syringe assembly according to  claim 23 , wherein the inner body portion has a tapered outer surface. 
     
     
         27 . The self-capping syringe assembly according to  claim 23 , wherein the one way valve includes a duck-bill type valve. 
     
     
         28 . The self-capping syringe assembly according to  claim 23 , wherein the one way valve is positioned and configured to allow fluid to flow from the outlet opening upon an increase in pressure within the fluid reservoir. 
     
     
         29 . The self-capping syringe assembly according to  claim 23 , wherein the one-way valve is positioned and configured to move to an open position in response to an increase in pressure within the one way valve.