Abstract: The system includes at least two power disc elements, each mounted for rotation on a central shaft which is typically fixed. The first power disc element includes a first peripheral gear portion by which the first power disc element may be turned by an input assembly. The first power disc element has a second gear portion which may have a substantially smaller diameter than the outside diameter thereof. A second power disc portion has a plurality of outer drive gears mounted for rotation to mate with the second peripheral gear portion on the first power disc element. A central gear, which may be substantially larger than the outer drive gears, is positioned to mate with the outer drive gear in the the second power disc element. The second power disc element drives an output assembly.

Abstract: The system includes at least two power disc elements, each mounted for rotation on a central shaft which is typically fixed. The first power disc element includes a first peripheral gear portion at the rim thereof by which the first power disc element may be turned by a first system gear mounted on a first system shaft which is offset from the central shaft. The first power disc element also has a second peripheral gear portion in the vicinity of the rim, extending forwardly. A second power disc element has a plurality of outer drive gears mounted for rotation to a rearwardly facing surface thereof, positioned to mate with the second peripheral gear portion on the first power disc element. A central gear is fixed to the central shaft to mate with the outer drive gears on the second power disc element. A second system gear mates with a peripheral gear portion of the second power disc element, the second system gear mounted on a second system shaft which is offset from the central shaft.

Abstract: The system includes at least two power disc elements, each mounted for rotation on a central shaft which is typically fixed. The first power disc element includes a first peripheral gear portion at the rim of the power disc element by which the first power disc element is turned. A first system gear mounted on a first system shaft mates with the first peripheral gear portion with first system shaft being offset from the central shaft. The first power disc element also has a second peripheral gear portion in the vicinity of the rim extending forwardly of the first power disc element. A second power disc element has a plurality of outer drive gears mounted for rotation to a rearwardly facing surface, positioned to mate with the second peripheral gear portion on the first power disc element. A central gear is fixed to the central shaft and mates with the outer drive gears on the second power disc element.