Integral orifice plate and metal seal

Claim 1

AN INTEGRAL ON-PIECE ORIFICE PLATE AND METAL SEAL FOR MOVEMENT INTO AND OUT OF A GAP BETWEEN ENDS OF A PIPE FOR MEASURING FLUID FLOW IN THE PIPE COMPRISING, A CIRCULAR METAL PLATE HAVING AN ORIFICE, A RESILIENT METAL SEAL INTEGRALLY CONNECTED TO THE OUTER PERIPHERY OF SAID PLATE ON THE DOWNSTREAM SIDE OF SAID PLATE INCLUDING, AN ANNULAR ARM PROTRUDING OUTWARDLY FROM THE PLATE, A SHOULDER PROVIDED AT THE OUTER EXTREMITY OF SAID ARM AND POSITIONED TO CONTACT THE PIPE WHEN THE ORIFICE PLATE IS INSERTED IN THE SAID PIPE GAP, AND A RESILIENT METAL LIP PROJECTING FROM SAID SHOULDER INWARDLY IN A DIRECTION SUBSTANTIALLY PARALLEL TO THE PLATE, AND THE OUTER END OF SAID LIP BEING POSITIONED A GREATER DISTANCE FROM THE PLANE OF THE PLATE THAN SAID SHOULDER AND POSITIONED TO ENGAGE THE END OF THE PIPE WHEN THE ORIFICE PLATE IS INSERTED IN SAID PIPE GAP THEREBY PROVIDING A RESILIENT METAL SEAL, THE OUTER END OF SAID LIP INCLUDING A TAPERED FACE ALLOWING THE LIP TO BE MOVED INTO THE PIPE GAP.