Automatic plastic-sealed valve having groove cleaning means

Claim 1

AN AUTOMATIC PLASTIC-SEALED VALVE INCLUDING A HOUSING HAVING A FLOWWAY THERETHROUGH, A CLOSURE MEMBER FOR THE FLOWWAY MOVABLE BETWEEN POSITIONS OPENING AND CLOSING THE FLOWWAY, A SEAT IN THE FLOWWAY ENGAGEABLE BY THE CLOSURE MEMBER, A FULL-PORT SEALANT GROOVE DISPOSED ABOUT THE FLOWWAY BETWEEN THE SEAT AND THE CLOSURE MEMBER, A SEALANT RESERVOIR IN THE HOUSING, PASSAGE MEANS ARRANGED TO CONNECT THE RESERVOIR TO SAID GROOVE IN THE FLOWWAY-CLOSING POSITION OF SAID CLOSURE MEMBER, BARRIER MEANS IN THE RESERVOIR MOVABLE IN RESPONSE TO FLUID PRESSURE DIFFERENTIALS ACROSS THE VALVE WHEN THE CLOSURE MEMBER IS IN THE FLOWWAY-CLOSING POSITION TO FORCE SEALANT THROUGH SAID PASSAGE MEANS INTO SAID GROOVE, TRAP CHAMBER MEANS IN THE HOUSING, AND DUCT MEANS OPERABLE IN SAID FLOWWAY-CLOSING POSITION OF THE CLOSURE MEMBER TO CONNECT SAID CHAMBER MEANS TO SAID GROOVE TO RECEIVE NON-SEALANT MATERIAL DISPLACED FROM SAID GROOVE BY ENTRY THEREIN OF SAID SEALANT.