Service main valve tap fitting

Claim 1

A VALVE TAP FITTING READILY ATTACHABLE TO A SERVICE MAIN COMPRISING A SERVICE FITTING HAVING A TUBE, SAID TUBE HAVING A THROUGH BORE AND A LATERAL OUTLET, SAID FITTING HAVING AN ARCUATE SADDLE THROUGH WHICH SAID THROUGH BORE EXTENDS, SAID ARCUATE SADDLE BEING COMPLEMENTARY TO A SERVICE MAIN TO WHICH IT IS TO BE SECURED, MEANS FOR SECURING AND SEALING SAID ARCUATE SADDLE TO THE SERVICE MAIN WITH SAID THROUGH BORE EXTENDING AGAINST THE SERVICE MAIN WITHIN SAID SEALING MEANS, SAID THROUGH BORE BEING A COUNTERBORE WITH A LARGE COUTERBORE EXTENDING TO THE SERVICE MAIN END THEREOF, AND A COUNTERBORE SHOULDER FLANGE AND FLANGE OPENING CONNECTING THE LARGE COUNTERBORE TO A SMALL, CYLINDRICAL COUNTERBORE EXTENDING THROUGH THE OUTER END OF SAID THROUGH BORE, SAID SMALL COUNTERBORE HAVING AN INTERNAL THREAD EXTENDING INWARDLY FROM ITS OUTER END TOWARD SAID SHOULDER FLANGE, THE DIAMETER OF THE OPENING IN SAID SHOULDER FLANGE BEING LESS THAN THE DIAMETER OF SAID THREADED SMALL COUNTERBORE, A VALVE RING SECURED IN SAID LARGE COUNTERBORE AGAINST SAID SHOULDER FLANGE, AND A VALVE FLAP, OF A DIAMETER GREATER THAN THAT OF SAID VALVE RING, HINGED OF A LESSER DIAMETER THAN THAT OF SAID VALVE RING, HINGED AT A SMALL PORTION OF ITS EDGE TO SAID VALVE RING, TO SEAT TOWARD AND ON SAID SHOULDER FLANGE AND TO OPEN TOWARD THE SERVICE MAIN END OF SAID LARGE COUNTERBORE.