{HEAD ~ Each cam gear} 82,84 comprises {TAIL ~ a pair} of diametrically opposed, asymmetrical lobes 94,95 and 94′,95′, respectively separated by opposing indents or notches 96,97 and 96′,97′ 
comprises
{ HEAD ~ Each cam gear } 82,84 comprises { TAIL ~ a pair } of diametrically opposed , asymmetrical lobes 94,95 and 94′,95′ , respectively separated by opposing indents or notches 96,97 and 96′,97′
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH