{HEAD ~ a supporting shank} pivotally mounted to {TAIL ~ said securing plate}, wherein said supporting shank being capable of rotating horizontally between an “in” position and an “open” position 
pivotally mounted to
{ HEAD ~ a supporting shank } pivotally mounted to { TAIL ~ said securing plate } , wherein said supporting shank being capable of rotating horizontally between an “ in ” position and an “ open ” position
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH