Abstract: The invention relates to a geared, irreversible motion transmitting device comprising a massive casing supporting an input means and an output means, one end of the input means being fitted with a pinion whereas one end of the output means is fitted with a gear wheel, said pinion and said gear wheel constituting a gear system. Said gearwheel and pinion are designed in a manner that, in operation, pinion rotation generates an effective force acting a distance off the center (C2) of the gear wheel, thereby implementing a corresponding gear wheel rotation, whereas gear wheel rotation generates an effective force (F?2) acting near the pinion center in a way to avert generating a corresponding pinion rotation.