Abstract: A multi-range continuously variable power transmission system having a rotatable system input shaft (52) and a rotatable system output shaft (72), a continuously variable transmission unit (CVT) (14) having CVT input (52) and CVT output shaft (54), a four shaft compound planetary gear power splitter (73) having a first shaft (78) driven by the system input shaft, a second shaft (80) driven by the CVT output shaft a third shaft (84) and a fourth shaft (86) and a multi-range output gear box (75) for driving the system output shaft. The gear box is in the form of a planetary gear set having a carrier shaft (87) eccentric with respect to and connected to the system output shaft (72), sun gear (89) and a grounded ring gear (90).

Abstract: A continuously variable transmission having a pair of plate-like omega members rotatable about and spaced on a primary transmission axis to be positioned on opposite sides of a biconical beta body, the axis of which is inclined at a large acute angle with respect to the primary transmission axis so that the beta body and omega members engage in rolling friction contact at two points of contact on opposite sides of the primary transmission axis. The omega body members are connected by an external torque cage and driven by a tubular shaft. The beta body is linked by gearing to a theta shaft rotatably supported within the omega shaft. The omega shaft carries at least one planetary gear set in which the planet gears are rotatably supported in the omega shaft and wherein the sun gear is carried by the theta shaft.

Abstract: A continuously variable traction drive transmission of the class including three working bodies, two of which are concentric with a first transmission axis, the other of which is concentric with a second axis intersecting and inclined with respect to the first axis, and wherein the points of rolling friction contact lie in diagonal quadrants defined by the first axis and a line perpendicular to the first axis at the intersection thereof with the second axis. The body concentric with the second axis includes two oppositely convergent cone-like rolling surfaces of revolution about the second axis which are held in rolling friction engagement with annular plate-like members forming one of the two bodies concentric with the first axis. The other of the two bodies concentric with the first axis carries the body on the second axis in nutation and continuously variable speed ratios are achieved by adjusting the angle of first and second axis through 90.degree.