Self-tapping service valve fitting

Claim 1

A SELF-TAPPING SERVICE VALVE FITTING FOR PLASTIC MAINS COMPRISING A SERVICE FITTING HAVING A TUBE HAVING A COUNTERBORED THROUGH BORE AND A LATERAL OUTLET IN THE INNER, LARGER BORE OF SAID THROUGH BORE, SAID FITTING HAVING AN OUTLET TUBE EXTENDING FROM SAID LATERAL OUTLET AND AN ARCUATED SADDLES THROUGH WHICH SAID INNER, LARGER BORE OF SAID THROUGH BORE EXTENDS FROM SAID THROUGH BORE TUBE, SAID ARCUATE SADDLE BEING COMPLEMENTARY TO A PLASTIC MAIN TO WHICH IT IS TO BE SECURED, AN ARCUATE SADDLE CLAMP, MEANS FOR SECURING SAID SADDLE CLAMP TO SAID THROUGH BORE SADDLE TO EMBRACE THE PLASTIC MAIN THEREBETWEEN AND SECURE SAID FITTING TO THE PLASTIC MAIN, AN O-RING RECEIVING GROOVE IN SAID MAIN CONTACTING SURFACE OF SAID THROUGH BORE SADDLE ABOUT SAID THROUGH BORE THERETHROUGH, AN O-RING IN SAID GROOVE PROVIDING AN EFFECTIVE SEAL BETWEEN SAID FITTING AND THE PLASTIC MAIN ABOUT SAID THROUGH BORE, SAID THROUGH BORE HAVING AN INTERIOR THREAD EXTENDING INWARDLY OF THE OUTER, SMALLER BORE THEREOF, A COMPLEMENTARY THREADED PLUG IN SAID THREAD OUTER, SMALLER BORE OF SAID THROUGH BORE, A CIRCULAR CUTTING KNIFE COAXIALLY SECURED TO THE INNER END OF SAID PLUG FOR PROJECTING OUT OF THE INLET END OF SAID BORE AT ITS INNER END FOR CUTTING A HOLE IN THE MAIN, CONCENTRIC WITH SAID BORE, BY SCREWING SAID PLUG THERETOWARD, SAID CIRCULAR KNIFE HAVING A CYLINDRICAL INTERIOR SURFACE EXTENDING INWARDLY FROM ITS CIRCULAR CUTTING EDGE FOR RECEIVING AND TRAPPING THE COUPON CUT FROM THE MAIN THEREWITHIN, SAID INTERIOR CYLINDRICAL SURFACE OF SAID CIRCULAR KNIFE BEING COUNTERBORED, THE LARGER BORE THEREOF BEING MORE REMOTE FROM THE CIRCULAR CUTTING EDGE, THE OUTER SURFACE OF SAID CUTTING KNIFE BEING BEVELED TOWARD ITS CUTTING EDGE, SAID CUTTING EDGE BEING A PROJECTION OF SAID INTERIOR CYLINDRICAL SURFACE, SAID THROUGH BORE TUBE ALSO HAVING AN EXTERIOR THREAD EXTENDING FROM ITS OUTER END, A COMPLEMENTARY THREADED CAP SCREWED THEREOVER, SAID CAP HAVING AN O-RING RECEIVING GROOVE IN ITS TUBE END ANNULUS ENGAGING SURFACE, AND AN O-RING IN SAID CAP GROOVE PROVIDING AN EFFECTIVE SEAL BETWEEN SAID CAP AND SAID TUBE END ANNULUS, SAID MEANS FOR SECURING SAID THROUGH BORE SADDLE AND SAID SADDLE CLAMP COMPRISING LIPS EXTENDING LATERALLY FROM ADJACENT EDGES OF SAID THROUGH BORE SADDLE AND SAID SADDLE CLAMP, SAID LIPS HAVING ALIGNED APERTURES, AND BOLD MEANS SECURED THROUGH SAID ALIGNED APERTURES.