The assembly 4, wherein the cam gear teeth are of {TAIL ~ varying shapes} and {HEAD ~ dimensions} 
The assembly 4 , wherein the cam gear teeth are of { TAIL ~ varying shapes } and { HEAD ~ dimensions }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD