Chip-free explosively actuated valve

Claim 1

IN AN EXPLOSIVELY ACTUATED VALVE, THE COMBINATION COMPRISING A BODY FORMED TO PROVIDE AN ELONGATED COMPARTMENT HAVING A RELATIVELY RESTRICTED CYLINDRICAL INTERMEDIATE PORTION, A FIRST PORTED CHAMBER ON ONE SIDE OF SAID RESTRICTED PORTION AND A SECOND PORTED CHAMER ON THE OTHER SIDE OF SAID RESTRICTED PORTION, SAID SECOND CHAMBER INCLUDING A CYLINDRICAL SECTION ADJACENT SAID RESTRICTED PORTION AND A REMOTE SECTION, SAID ADJACENT SECTION HAVING A DIAMETER LARGER THAN SAID RESTRICTED PORTION BUT LESS THAN SAID REMOTE SECTION, ELONGATED RAM MEANS ARRANGED IN SAID COMPARTMENT AND INCLUDING A CLOSURE PART AT ONE END ARRANGED IN SAID RESTRICTED PORTION AND TRANSVERSELY FILLING THE SAME AND HAVING AN INTERFERENCE FIT WITH THE SURROUNDING WALL SURFACE OF SAID RESTRICTED PORTION, A PISTON PART AT THE OTHER END AND TRANSVERSELY FILLING SAID REMOTE SECTION AND HAVING A PRESS FIT WITH THE SURROUNDING WALL THEREO AND A CYLINDRICAL DECELERATION PART ARRANGED IN SAID REMOTE SECTION BETWEEN SAID CLOSURE AND PISTON PARTS AND HAVING A SLIGHTLY LARGER DIAMETER THAN SAID ADJACENT SECTION AND OUT OF ENGAGEMENT THEREWITH, AND DETONATOR MEANS ARRANGED WHEN FIRED TO DRIVE SAID CLOSURE PART OUT OF SAID RESTRICTED PORTION INTO SAID FIRST CHAMBER AND THEREBY ESTABLISH COMMUNICATION BETWEEN SAID CHAMBERS AND ALSO TO DRIVE SAID DECELERATION PART TOWARD SAID ADJACENT SECTION AND INTO AN INTERFERENCE FIT THEREWITH AND THEREBY SEALINGLY CLOSE ONE END OF SAID ADJACENT SECTION.