Abstract: Disclosed is a transmission having an input shaft coupled to a motor unit on one side of the transmission and a braking device located on the other side of the unit. Planetary gear trains are located together on one side of the gear box with shafts coupled to the drive wheels or tracks extending through the braking unit on one side and through the gear box on the other. The gear box is connected to the planetary gear train by an output shaft and housing which is also connected to the braking device. Finally, a steering device is located within the transmission housing and serves to controllably interconnect the planetary gear of the planetary gear trains. This advantageously permits the brake unit to be mounted outside of the transmission housing which includes the planetary gear trains, the gear box and the steering device.

Abstract: A chain speed gearing device including a complex planetary train utilizing two sun wheels and two sets of planetary wheels of the Ravigneaux type, combined with a simple planetary train acting as a range doubler and driven by the planet wheel carrier shaft of the Ravigneaux train. The input motion is performed on the annulus of the Ravigneaux train for at least one of the speeds of the train by stoppage of the first sun wheel the output being taken from the planet wheel carrier of the Ravigneaux train. The speed of the direct drive is obtained by simultaneous input on one of the sun wheels of the Ravigneaux train and on the annulus, and by taking the output from the planet wheel another speed may be obtained by input on the second sun wheel and stoppage of the other sun wheel and by taking the output from the planet wheel carrier. Reverse motion is provided by input on the second sun wheels, stoppage of the annulus and output by the planet wheel carrier.