The pivot 8 wherein said wedge includes a pair of {HEAD ~ superposed wedges} bearing on each other through two facing flat faces inclined to the axis of {TAIL ~ said axial housing} 
The pivot 8 wherein said wedge includes a pair of { HEAD ~ superposed wedges } bearing on each other through two facing flat faces inclined to the axis of { TAIL ~ said axial housing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL