an adjustable post mechanism attached to a mounting plate assembly which is attached to {HEAD ~ a lower portion} of {TAIL ~ a patient chair}, said adjustable post mechanism configured for height adjustment and pivotal adjustment 
of
an adjustable post mechanism attached to a mounting plate assembly which is attached to { HEAD ~ a lower portion } of { TAIL ~ a patient chair } , said adjustable post mechanism configured for height adjustment and pivotal adjustment
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH