Float valve mechanism

Claim 1

IN A FLOAT VALVE OF THE TYPE ADAPTED TO BE SUBMERGED IN LIQUID IN A CONTAINER, A VALVE BODY HAVING AN INTERNAL CHAMBER AND AN UPWARDLY OPENING ANNULAR PORT COMMUNICATING WITH SAD CONTAINER, CONCENTRIC ANNULAR SEAT PORTIONS DISPOSED AT THE INNER AND OUTER PERIPHERIES OF SAID ANNULAR PORT, A VERTICALLY ELONGATED FLOAT GUIDE EXTENDING ABOVE SAID SEAT PORTIONS IN SAID CONTAINER, AND A FLOAT MOVABLE ALONG SAID GUIDE IN RESPONSE TO CHANGES IN THE LEVEL OF LIQUID IN SAID CONTAINER, THE IMPROVEMENTS WHICH COMPRISE, AN ANNULAR VALVE CLOSURE MEMBER CARRIED BY SAID FLOAT AND HAVING INNER AND OUTER CONCENTRIC FLEXIBLE RESILIENT FLANGES DISPOSED TO CLOSE AGAINST SAID ANNULAR SEAT PORTIONS RESPECTIVELY, SAID OUTER FLANGE PROJECTING OBLIQUELY OUTWARDLY AND DOWNWARDLY AND SAID INNER FLANGE PROJECTING OBLIQUELY INWARDLY AND DOWNWARDLY AND BOTH OF SAID FLANGES HAVING THIN FEATHERED LOWER EDGE PORTIONS FOR CLOSING SAID ANNULAR PORT WHEN THE LIQUID DESCENDS TO A PREDETERMINED LOW LEVEL IN SAID CONTAINER.