The cuff retaining ring is further adapted to exert a substantially axially directed force directed against the annular cuff portion and first and second axially spaced walls of the annular recess whereby a controllable torque to rotate {HEAD ~ the cuff} relative to {TAIL ~ the orifice ring} is developed substantially due to friction between the first and second recess walls cuff portion and the annular recess 
The cuff retaining ring is further adapted to exert a substantially axially directed force directed against the annular cuff portion and first and second axially spaced walls of the annular recess whereby a controllable torque to rotate { HEAD ~ the cuff } relative to { TAIL ~ the orifice ring } is developed substantially due to friction between the first and second recess walls cuff portion and the annular recess
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH