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CHECK VALVE FLAP FOR FLUID INJECTOR

  • US 20090065067A1
  • Filed: 06/27/2008
  • Published: 03/12/2009
  • Est. Priority Date: 05/22/2007
  • Status: Active Grant
First Claim
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1. A vacuum backflow prevention system, comprising:

  • a fluid ejector tube adapted for insertion into a patient'"'"'s mouth;

    a backflow prevention device, comprising;

    a distal portion defining a valve seat portion and an inlet, the distal portion operably connected to the fluid ejector tube;

    a proximal portion defining an outlet, the proximal portion configured for operative connection to the distal portion;

    a valve member retained between the proximal and distal portions, the valve member being moveable from a first position substantially blocking fluid flow between the inlet and the outlet, and a second position wherein at least a portion of the valve member is moved in a direction toward the outlet to permit fluid to flow from the inlet to the outlet under a vacuum condition, the valve member having a stiffening structure extending from a surface of the valve member, the stiffening structure providing increased resistance to movement of the at least a portion of the valve flap from the first position to the second position.

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