Aircraft under-wing fueling nozzle and valve and sealing means therefor

Claim 1

IN A FUELING NOZZLE CHARACTERIZED BY A BODY PORTION HAVING AN OUTLET END AND AN OUTLET PASSAGE AND A POPPET ELEMENT ADAPTED TO BE EXTENDED BEYOND SAID OUTLET END TO OPEN SAID NOZZLE AND RETRACTED INTO SAID OUTLET PASSAGE TO CLOSE SAID NOZZLE, THE IMPROVEMENT WHICH COMPRISES A POPPET SEALING MEANS OF FLEXIBLE, RESILIENT MATERIAL AND RING-LIKE CONFIGURATION FITTED AT SAID OUTLET END, SAID SEALING MEANS HAVING A LIP EXTENDING INWARDLY FROM SAID BODY PORTION TOWARD THE CENTER OF SAID PASSAGE IN POSITION TO ENGAGE THE LOWER PERIPHERY OF SAID POPPET ELEMENT WHEN IT IS IN RETRACTED POSITION, SAID LIP HAVING AN UPPER SURFACE ADAPTED TO PROVIDE A SEAT FOR SAID POPPET WHEN SAID POPPET IS IN RETRACTED POSITION AND A LOWER SURFACE EXTENDING INWARDLY FROM SAID BODY PORTION INTO SAID PASSAGE ADAPTED FOR EXPOSURE TO FLUID PRESSURE WITHIN SAID NOZZLE TO CAUSE SAID LIP TO BE PRESSED WITHIN SAID NOZZLE TO CAUSE SAID LIP TO BE PRESSED FIRMLY AGAINST SAID POPPER IN RETRACTED POSITION WHEREBY THE SEALING EFFECT OF SAID SEALING MEANS AGAINST SAID POPPET TO PROVIDE FLUID-TIGHT CLOSURE OF THE OUTLET END OF SAID NOZZLE IS ENHANCED, SAID INWARDLY EXTENDING LIP BEING NEAR THE UPPER END OF SAID POPPET SEALING MEANS AND SAID SEALING MEANS HAVING ADDITIONALLY AN OUTWARDLY EXTENDING LIP AT ITS LOWER END, AND SAID NOZZLE BEING CHARACTERIZED FURTHER BY AN INTERNAL CIRCUMFERENTIAL GROOVE NEAR ITS OUTLET END WITHIN WHICH GROOVE SAID OUTWARDLY EXTENDING LIP ON SAID SEALING MEANS IS FITTED.