Abstract: A power transfer device for a four-wheel drive vehicle includes a first shaft for transferring torque to a first driveline, a second shaft for transferring torque to a second driveline, and a transfer mechanism driving the second shaft. A mode clutch assembly drivingly connects the first shaft to the transfer mechanism and includes a clutch gear driven by the transfer mechanism and a mode sleeve. A sprocket hub associated with the transfer mechanism has external drive teeth meshed with internal drive teeth on the clutch gear with a predetermined amount of backlash therebetween. A ball cam mechanism centers the backlash and permits relative rotation between the transfer mechanism and the mode sleeve to circumvent a blocked mode shift.

Abstract: The invention relates to a manual transmission having an input shaft (12), one first and one second mechanical gear branch (26, 28) that may be coupled in a driving fashion on the input side with the input shaft and on the output side via various gears (G1, . . . , G7,R) with a common output shaft (40), and one first and one second hydrostatic machine (18, 18?, 20, 20?), each comprising a primary part (16), a secondary part (22, 24), and one first and one second pressure chamber. The primary part and the secondary part of each hydrostatic machine (18, 18?, 20, 20?) are rotatable relative to one another, wherein the secondary part (22) of the first hydrostatic machine (18, 18?) is operatively connected to the first mechanical gear branch (26) and the secondary part (24) of the second hydrostatic machine (20, 20?) is operatively connected to the second mechanical gear branch (28).

Abstract: The invention relates to a torque transmission device, especially for the drive train of a motor vehicle, said device comprising a pump comprising a first pump part, a second pump part, a suction chamber and a pressure chamber, the first pump part and the second pump part being mutually rotatable. A rotary movement of the first pump part in relation to the second pump part allows a hydraulic fluid to be transported from the suction chamber into the pressure chamber of the pump, torque transmitted between the first pump part and the second pump part depending on the pump pressure generated by the pump. At least one pressure control device is associated with the pump, said device constricting a fluid stream transported by the pump in a variable manner in order to vary the rotational speeds of the first pump part and the second pump part in relation to each other.