Refill valve for gas lighter

Claim 1

A REFILL ASSEMBLY FOR FILLING A LIQUEFIED GAS FUEL RESERVOIR HAVING AN OPENING IN THE WALL THEREOF FROM A REFILL TANK HAVING AN OUTLET VALVE NORMALLY CLOSED BY A SPRING OF PREDETERMINED STRENGTH INCLUDING IN COMBINATION, A COMMON VALVE SEAT, MEANS MOUNTING SAID VALVE SEAT ADJACENT SAID OPENING WHEREBY THE OUTER SURFACE OF SAID SEAT FACES THE ATMOSPHERE AND THE INNER SURFACE OF SAID SEAT FACES THE INTERIOR OF THE RESERVOIR, THE PORTION OF SAID MOUNTING MEANS EXTERIOR OF SAID SEAT BEING IMPERVIOUS TO THE PASSAGE OF GAS, A VALVE PLUG AND A SPRING HAVING A STRENGTH LESS THAN SAID PREDETERMINED STRENGTH FOR URGING SAID PLUG INTO ENGAGEMENT WITH THE INNER SURFACE OF SAID SEAT, MEANS FORMING A GAS PASSAGE FOR CONNECTING SAID TANK TO SAID RESERVOIR, SAID GAS PASSAGE FORMING MEANS BEING MOVABLE WITH REFERENCE TO SAID TANK TO OPEN SAID TANK VALVE, SAID GAS PASSAGE FORMING MEANS HAVING AN END FOR ENGAGING SAID PLUG TO MOVE SAID PLUG AWAY FROM SAID SEAT, SAID GAS PASSAGE FORMING MEANS HAVING A SHOULDER SPACED FROM SAID END FOR ENGAGING THE EXTERIOR SURFACE OF SAID SEAT TO PROVIDE A SEAL, THE SPACING OF SAID SHOULDER FROM SAID END BEING SUCH THAT SAID PLUG IS DISPLACED FROM SAID SEAT BEFORE SAID SHOULDER ENGAGES SAID EXTERIOR SURFACE AS SAID PASSAGE FORMING MEANS MOVES INWARDLY OF SAID RESERVOIR.