A valve for use with a syringe and which prevents backflow

A - Human Necessities – 61 – M

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Details

A61M 39/24 (2006.01) A61M 39/26 (2006.01)

Patent

CA 2444889

A one-way valve assembly can be fitted to the end of a syringe to allow fluid to flow from the syringe and into a body cavity but to prevent backflow. The valve assembly is opened by insertion of the luer tip of the syringe into the assembly inlet. The valve has an internal elastic member that forms a variable volume internal chamber. This chamber expands upon insertion of the luer tip into the inlet and shrinks when the luer tip is removed from the assembly. The shrinking action creates a positive pressure in the valve assembly to prevent backflow.

L'invention concerne un ensemble clapet de non retour pouvant être adapté à l'extrémité d'une seringue afin de permettre au fluide de s'écouler de la seringue dans une cavité du corps et d'empêcher le refoulement. Ledit ensemble clapet est ouvert par l'insertion de l'embout Luer de la seringue dans l'entrée de l'ensemble. Le clapet comporte un élément élastique interne qui forme une chambre interne de volume variable. Ladite chambre s'agrandit lors de l'insertion de l'embout Luer dans l'entrée et réduit de volume lorsque ledit embout est retiré de l'ensemble. La réduction de volume crée une pression positive dans l'ensemble clapet afin d'empêcher le refoulement.

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