Method of assembling low stress threaded connection

Claim 1

IN A METHOD OF ASSEMBLING A GUIDE STUD FOR THE PRESSURE-SUCTION CLOSURE DISC OF A CHECK VALVE WITH THE PORTED SEAT OF THE VALVE, SAID STUD BEING PROVIDED WITH A THREADED TERMINAL PORTION, A WAIST PORTION ADJACENT SAID THREADED PORTION AND OF A DIAMETER SMALLER THAN THE ROOT DIAMETER OF SAID THREADED PORTION, A CONED PORTION WITH ITS SMALL DIAMETER END ADJACENT SAID WAIST PORTION, A BODY PORTION ADJACENT SAID CONED PORTION AND OF A DIAMETER GREATER THAN THE ROOT DIAMETER OF SAID THREADED PORTION, SAID CONED PORTION BEING TAPERED FROM SAID BODY PORTION TOWARD SAID WAIST PORTION CORRESPONDINGLY TO THE ENTRANT TAPER OF A HOLE IN SAID VALVE SEAT, AND SAID TAPER BEING WITHIN THE RANGE OF 1/4 INCH TO 1 1/4 INCHES TO THE FOOT, THE STEPS INCLUDING TURNING SAID THREADED PORTION FINGER TIGHT INTO SAID HOLE UNTIL SAID CONED PORTION IS IN FULL SURFACE CONTACT WTITH THE TAPERED SURFACE OF SAID HOLE, AND THEN APPLYING A PREDETERMINED TURNING EFFORT TO SAID BODY PORTION SUFFICIENT TO PLACE SAID THREADED AND WAIST PORTIONS IN TENSION THEREBY TO INDUCE A BINDING ACTION BETWEEN SAID TAPERED SURFACES WHICH SECURES THE STUD AGAINST WORKING LOOSE UNDER THE INTERMITTENT UPWARD POUNDING TO WHICH IT IS SUBJECTED DURING OPERATION OF THE VALVE, SAID TURNING EFFORT BEING LIMITED TO A LOW ORDER INSUFFICIENT TO STRESS THE WEAKER ONE OF THE STUD AND SEAT MATERIALS TO APPROXIMATELY 50% OF THE ELASTIC LIMIT THEREOF WHEREBY TO RESERVE A SUBSTANTIAL MARGIN OF STRENGTH TO ACCOMMODATE THE WORKING STRESSES TO BE SUSTAINED DURING OPERATION OF THE VALVE WITHOUT EXCEEDING THE ELASTIC LIMIT OF THE WEAKER MATERIAL.