Automatic sealant sealed valve with sealing groove purging means

Claim 1

IN AN AUTOMATIC SEALANT SEALED VALVE INCLUDING A HOUSING HAVING FLOW PORTS DEFINING A FLOWWAY THERETHROUGH, A CLOSURE CHAMBER INTERSECTING SAID FLOWWAY, AND A CLOSURE MEMBER IN THE CHAMBER MOVABLE BETWEEN POSITIONS OPENING AND CLOSING SAID FLOWWAY, ANNULAR SEAT MEMBERS SLIDABLY DISPOSED ABOUT THE INNER ENDS OF SAID FLOW PORTS FOR MOVEMENT INTO ENGAGEMENT WITH OPPOSED FACES OF SAID CLOSURE MEMBER, AN ANNULAR SEALING GROOVE DISPOSED ABOUT SAID FLOWWAY BETWEEN THE INNER END OF EACH OF SAID SEAT MEMBERS AND SAID CLOSURE MEMBER, A SINGLE SEALANT RESERVOIR CARRIED BY THE HOUSING, A SEALANT-DISPLACING BARRIER MEMBER SLIDABLY DISPOSED IN SAID RESERVOIR, MEANS COMMUNICATING SAID CLOSURE CHAMBER WITH SAID RESERVOIR ON ONE SIDE OF SAID BARRIER MEMBER, PASSAGE MEANS COMMUNICATING THE RESERVOIR ON THE OPPOSITE SIDE OF SAID BARRIER MEMBER WITH BOTH SEALING GROOVES WHEN THE CLOSURE MEMBER IS THE FLOWWAY-CLOSING POSITION, AND MEANS FOR INTRODUCING SEALANT INTO SAID RESERVOIR BETWEEN SAID OTHER SIDE OF SAID BARRIER MEMBER AND SAID PASSAGE MEANS, SAID BARRIER MEMBER HAVING AN AREA ON SAID ONE SIDE EXPOSED TO LINE PRESSURE IN SAID CLOSURE CHAMBER, AND HAVING FIRST AND SECOND AREAS ON SAID OTHER SIDE EXPOSED, RESPECTIVELY, TO SAID SEALING GROOVES AND TO ATMOSPHERIC PRESSRUE EXTERIORLY OF SAID HOUSING, WHEREBY TO INCREASE THE DIFFERENTIAL PRESSURE FORCE ACTING ON SAID SEALANT.