The mechanism rebounds with the natural cosine function of {TAIL ~ the spring mass} of {HEAD ~ the resilient rebound device} to minimize energy losses during reversal 
The mechanism rebounds with the natural cosine function of { TAIL ~ the spring mass } of { HEAD ~ the resilient rebound device } to minimize energy losses during reversal
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH