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