Patent ID: 7398953

Claim:
A one way valve comprising: a valve body having a wall, a fluid inlet, a fluid outlet, and a flange having opposed first and second surfaces and a centrally disposed opening through the flange, a first cylindrical wall extends from the first surface and is disposed circumjacent the opening, the first cylindrical wall having a fluid exit through the wall and in fluid communication with the opening, the flange having a second cylindrical wall extending from the second surface and defining a fluid passageway circumjacent the opening and in fluid communication therewith; a valve supporting surface extends across a distal end of the second cylindrical wall and across the entire diametric dimension thereof; a plunger associated with the valve body and moveable with respect to the valve body first position to a second position; and a diaphragm positioned in the valve body for movement between a third position and a fourth position when the plunger is in the first position, wherein when the diaphragm is in the third position the fluid outlet is closed and when the diaphragm is in the fourth position the fluid outlet is open.