Patent ID: 7921825

Claim:
A heat engine, comprising: at least one engine block that rotatably receives a crankshaft; a balancer housing fixed to the engine block, which rotatably receives a pair of parallel balance shafts, of a primary shaft and a secondary shaft, which are provided with eccentric weights and that are rotated by the crankshaft; a ring gear rotationally connected to the crankshaft to permanently mesh with a first pinion carried by one end of the primary balance shaft; a second pinion carried by the end of the primary balance shaft to mesh with a pinion carried by one end of the secondary balance shaft; and transverse holes extending through ends of the primary and secondary balance shafts and configured to be aligned with one another in a specified position of the primary and secondary balance shafts before the balancer housing is mounted on the engine block, to receive a removable securing element.