a limiting element for limiting {HEAD ~ rotational displacements} of {TAIL ~ the second coupling element} with respect to the first coupling element; and 
a limiting element for limiting { HEAD ~ rotational displacements } of { TAIL ~ the second coupling element } with respect to the first coupling element ; and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH