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