Valve device comprising resilient

Claim 1

A VALVE DEVICE FORMED OF FLEXIBLY RESILIENT MATERIAL COMPRISING AN ESSENTIALLY TUBULAR THIN WALLED BODY PART HAVING AN ELONGATED TAPERED PORTION EXTENDING FROM A CYLINDRICAL CROSS-SECTION TO A LOWER END OF FLATTENED CROSSSECTION PROVIDING AN ELONGATED SLIT NORMALLY FORMING A FLUID TIGHT CLOSURE PREVENTING UPWARD FLOW OF FLUID THROUGH SAID DEVICE, A CIRCUMFERENTIAL FLANGE PROTRUDING OUTWARDLY FROM SAID BODY PART AT THE JUNCTURE OF THE CYLINDRICAL AND TAPERED PORTION THEREOF AND PERPENDICULARLY TO THE AXIS OF SAID BODY PART, SAID FLANGE BEING OF SUFFICIENT RADIAL DIMENSION TO PROVIDE A PERIPHERAL MOUNTING ZONE FOR MOUNTING ENGAGEMENT WITH A CONTAINER AND AN INTERMEDIATE CIRCUMFERENTIAL ZONE BETWEEN SAID MOUNTING ZONE AND BODY PART, THE FLEXIBILITY IN SAID INTERMEDIATE ZONE PERMITTING AXIAL MOVEMENT OF THE BODY PART WITH RESPECT TO SAID PERIPHERAL MOUNTING ZONE, AND SAID TAPERED PORTION HAVING DIAMETRICALLY OPPOSED AXIAL STIFFENING MEANS COMMENCING AT MID-POINTS OF THE FLAT SIDES OF THE LOWER END THEREOF AND EXTENDING TO AND INTEGRALLY JOINING THE INTERMEDIATE CIRCUMFERENTIAL ZONE OF SAID FLANGE, SAID STIFFENING MEANS AT THE DIAMETRICALLY OPPOSED POINTS OF JUNCTURE WITH SAID FLANGE EXTENDING RADIALLY FROM SAID BODY PART TO POINTS CLOSELY ADJACENT SAID PERIPHERAL MOUNTING ZONE, WHEREBY DOWNWARD MOVEMENT OF SAID BODY PART WITH RESPECT TO SAID PERIPHERAL MOUNTING ZONE ACTUATES SAID VALVE TO PERMIT UPWARD FLOW OF FLUID THERETHROUGH BY IMPARTING A ROCKING MOTION TO SAID STIFFENING MEANS AND SEPARATION OF THE LOWER ENDS THEREOF TO FORM A FLUID OPENING AT THE SLIT END OF SAID DEVICE.