A mechanical counter-torque drive operating with zero backlash is provided. The mechanical counter-torque drive comprises a driving pinion rotationaily driven by a driving element. Multiple input gears are drivably connected to the driving pinion. Each of multiple planetary gear trains is drivably connected to one o...

1 .A planetary geared drum sprocket drive comprising a rotating gear housing wherein multi¬stage planetary gearing with ring gears form part of the said housing: an input shaft for the said assembly which is hollow on one side to receive the drive motor shaft, said input shaft being connected to the first stage sun ...