Method and tool arrangement for installing an omicron-ring in a recess of a bore

Claim 1

THE METHOD OF INSERTING A RESILIENT O-RING IN A RECESS LOCATED INTERMEDIATE THE ENDS OF A SMALL BORE WHICH IS NORMALLY CLOSED AT ONE END BY A VALVE MEMBER, SAID ORING BEING DEFORMABLE AND HAVING AN OUTER DIAMETER GREATER THAN THE DIAMETER OF SAID SMALL BORE SO THAT THE O-RING IS SUBJECT TO FLEXING AND TWISTING AS IT IS INSERTED INTO SAID SMALL BORE, SAID METHOD COMPRISING THE STEPS OF INSERTING A STEM MEMBER HAVING A CAM SURFACE THEREON TERMINATING IN A WIDENED PORTION SUBSTANTIALLY FILLING SAID SMALL BORE INTO SAID SMALL BORE UNTIL THE CAM SURFACE IS ADJACENT THE RECESS, PLACING ON O-RING ABOUT THE STEM MEMBER, APPLYING PRESSURE AGAINST THE O-RING FOR COMPRESSING THE O-RING TO THE DIAMETER OF SAID SMALL BORE AND FOR PUSHING THE O-RING INTO ENGAGEMENT WITH THE RECESS, AND WITHDRAWING SAID STEM MEMBER TO CAM OUTWARDLY AND PROPERLY SEAT SAID O-RING IN SAID RECESS.