Abstract: A hydromechanical powertrain for a ground vehicle. The powertrain, more specifically a transmission, includes an input shaft that is coupled to a rotational power source and an output shaft that is coupled to a load. A first hydrostatic unit coupled to a first gear, while a second hydrostatic unit is selectively coupled to one of a pair of clutches. The first of the clutches has a first clutch gear that is selectably coupled to a first mode gear, which is in turn rotationally fixed to the output shaft. The second of clutches has a second clutch gear that is selectively coupled to a second mode gear, which is in turn rotationally fixed to the input shaft. Also coupled to the input shaft is a planetary gear set.

Abstract: A hydromechanical powertrain for a ground vehicle. The powertrain, more specifically a transmission, includes an input shaft that is coupled to a rotational power source and an output shaft that is coupled to a load. A first hydrostatic unit coupled to a first gear, while a second hydrostatic unit is selectively coupled to one of a pair of clutches. The first of the clutches has a first clutch gear that is selectably coupled to a first mode gear, which is in turn rotationally fixed to the output shaft. The second of clutches has a second clutch gear that is selectively coupled to a second mode gear, which is in turn rotationally fixed to the input shaft. Also coupled to the input shaft is a planetary gear set.

Abstract: A mechanism for powering a combine header unit at infinitely variable speeds. A primary motor is coupled to a primary input shaft via a clutch, a variable-speed secondary motor is directly coupled to a secondary input shaft, and the header unit coupled to a header output shaft. A planetary gear-train couples the primary input shaft, the secondary input shaft, and the header output shaft to each other. A primary brake is coupled to the primary input shaft, and a secondary brake coupled to the secondary input shaft. A control circuit is employed to command the operation of the clutch, the secondary motor, the primary brake, and the secondary brake in response to operator commands.

Abstract: A transmission is provided having a sun gear, ring gear and planet carrier mounted in a housing. A plurality of planet gears are rotatably mounted to the planet carrier. The planet carrier is connected to one of either an input shaft or an output shaft while the ring gear is connected to the other of either the input shaft or output shaft. A clutch engageably and disengageably couples the sun gear for rotation with one of the input or output shafts to which the planet carrier is coupled. A brake engageably and disengageably fixes the sun gear against rotation relative to the housing. A hydraulically engaged/spring disengaged non-rotating piston is mounted in the housing and is slidable in response to fluid pressure between an engaged position for engaging one of the clutch and the brake and a retracted position for disengaging the one of the clutch and the brake.

Abstract: An infinitely variable four mode hydro-mechanical transmission has a planetary system including three planetary gear sets, four clutches and a reverse brake. A first hydrostatic unit is geared to the second row ring of the planetary system. A second hydrostatic unit is geared to the planet carrier via a first clutch in Modes One and Four. The second hydrostatic unit is geared to the second row sun of the planetary system via a second clutch in Modes Two and Three. A third clutch connects the planet carrier to the output in Modes One and Two. A fourth clutch connects the second planetary row sun gear to the output in Modes Three and Four. A reverse brake is attached to the third planetary row. When the reverse brake is engaged and both the third and fourth clutches are disengaged the third row sun and thus the transmission output is driven in reverse.

Abstract: A differential lock is activated by a non-rotating piston mounted substantially inside the side quill of the differential. Non-rotating seals are provided between the side quill and the piston to form a pressure chamber for the piston. A thrust bearing is provided between the piston and the pressure plate of the clutch of the differential lock to transmit force from the piston to the clutch while allowing relative rotation therebetween.