Improved check valve flap for fluid injector

Details Improved check valve flap for fluid injector Improved check valve flap for fluid injector

A - Human Necessities

61

C

A61C 17/06 (2006.01) A61C 17/12 (2006.01) A61C 19/00 (2006.01)

Patent

CA 2722928

A backflow-prevention system that substantially prevents contaminant backflow at a treatment site. The system in-cludes a fluid ejector tube for insertion into the patient's mouth and a backflow prevention device that receives fluid from the fluid ejector tube. The backflow prevention device includes an internally positioned valve member. The valve member limits contami-nant backflow. The valve member is movable between open and closed positions based on a vacuum pressure condition in the sys-tem.

La présente invention concerne un système de prévention des reflux qui empêche sensiblement le reflux d'agents contaminants au niveau d'un site de traitement. Ce système comprend un tube d'éjecteur de fluide s'insérant dans la bouche du patient, et un dispositif de prévention du reflux qui reçoit le fluide provenant du tube d'éjecteur. Le dispositif de prévention du reflux comporte un élément de soupape disposé intérieurement. L'élément de soupape limite le reflux des agents contaminants. L'élément de soupape est mobile entre une position ouverte et une position fermée en fonction des conditions de dépression régnant dans le système.

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