Doctor suggested cortisone injection and on July 13 I had a shot in my shoulder. The pain lessened. I had been doing physiotherapy for 9 weeks before and after the shot. However I was at work and had to hop up over a small counter top. My life has been a severe painful nightmare since then. The pain I've been experiencing since that day is unbearable. I was not told that cortisone weakens the tendons in and around the area of the injection. The doctor gives me strong pain killers but they have side effects that I'm looking forward to.
An O-ring, also known as a packing, or a toric joint, is a mechanical gasket in the shape of a torus; it is a loop of elastomer with a round cross-section, designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal at the interface.
In most cases, O-rings are sized by the inside diameter (I.D.) then by the cross section (C/S) or width (W). When you call out an O-ring by its size you would give the I.D. first then the C/S second.Like this: 1.239X.070 inches. This is also how metric O-rings are called out.o ahead and get a water balloon and try it. The O-ring does the same thing in the groove. Pressure squeezes the o-ring against the wall of the groove forcing it to expand in the opposite direction helping the o-ring to seal against the walls of the groove (See the diagram below).