The Russian Federal Nuclear Center – All-Russian Research Institute of Experimental Physics (RFYaTs-VNIIEF), together with the state corporation "Rosatom", have patented a precessional planetary-pinion gearbox. The development is intended for use in mechanical engineering, robotics, and special equipment drives.

The invention is a gearbox in which the rotation of the input shaft is converted through a double-ring satellite mounted on an inclined eccentric surface. The pins on the satellite rings interact with the teeth of the central gears, which are shaped like a bicycle sprocket. The number of pins on one ring is one more than the number of teeth on the fixed gear, and on the second, it is one more again, which provides the necessary gear ratio.

The precession center is located at the center of mass of the gearbox, which, according to the developers, reduces dynamic loads and ensures smooth operation. The patent notes that this solution simplifies the design and manufacturing technology of the gearbox compared to existing analogues.