inside of each carrier assembly 16 17 does not have a support shaft the interspace between the inner faces of the carrier assembles 16 17 allows room for the crank pin 4 to pass as it reciprocates up and down pinion shafts 20 21 22 23 on which the planet pinion gears 11 12 13 14 are mounted are fixed to these planet pinion gears 11 12 13 14 respectively and therefore rotate together the pinion shafts 20 21 22 23 also pass through bearings 52 54 53 and 55 respectively before extending beyond the carrier assemblies 16 17 on the outside of each unit on the inside of the system 1 one pinion shaft 20 from the left gearset 2 and one pinion shaft 21 from the right gearset 3 are directly connected through a web of material 56 and 57 to a journal i e the crank pin 4 the center line 58 of the crank pin 4 is directly in line with the pitch circle 59 of the planet pinion gear 11 this effectively forms the appearance of a conventional crankshaft comprising the pinion shaft 20 the crank pin 4 and the pinion shaft 21 hereinafter referred to collectively as the u201c crankshaft u201d the offset of the crank pin 4 in relation to the center line of the pinion shafts 20 21 is only half that of.