{HEAD ~ The invention} is a dampener for mounting near the end of {TAIL ~ a rotatable shaft} 
{ HEAD ~ The invention } is a dampener for mounting near the end of { TAIL ~ a rotatable shaft }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL