Patent ID: 7699193

Claim:
A self-closing valve for the dispensing of flowable media from a container having; a curved membrane, the curvature of which is directed toward the flowable media in the closed position and which curves outwardly into a dispensing position upon pressure being generated in the container, a connecting wall arranged between said membrane and a first retaining ring, a slitting provided in said membrane which opens in the dispensing position, wherein said slitting is arranged such that upon the deformation of the membrane from the closed position to the dispensing position induced by the application of pressure to the container, elastic resilient forces are generated within the membrane which cause said membrane to retract from said dispensing position to said closed position upon depressurization, said connecting wall between said first retaining ring and said membrane is disposed with a disc-like area which is arranged substantially in a common plane with said first retaining ring or on a plane which is parallel to same, wherein a transition zone between the connecting wall and the membrane is configured such that substantially no or only minimal torque is transferred from said connecting wall to said membrane so that any torque transmitted from said connecting wall to said membrane has substantially no effect on the opening and closing of said slitting; and a constriction/notch is provided in said transition zone between the connecting wall and the membrane on a side facing away from the container; wherein said connecting wall has an area extending upwardly in curved fashion from the first retaining ring away from the container interior when the valve is affixed to the container; the upwardly curved area merges with an annular protrusion into the membrane so that the transition zone between the connecting wall and the membrane is configured in a hinge-like manner.