Patent ID: 8262525

Claim:
A hydrostatic-mechanical power split transmission comprising: a drive shaft ( 1 ) being connectable to a planet carrier ( 10 ) of a summation gear via a forward drive clutch ( 7 ), and via a reverse drive clutch ( 6 ), the summation gear having a first sun gear ( 13 ), a second sun gear ( 14 ), a ring gear ( 15 ), and at least on double planetary gear ( 12 ) arranged on the planet carrier ( 10 ), a first hydraulic unit ( 17 ), of a hydraulic transmission branch, being directly connected to the first sun gear ( 13 ) in a rotationally fixed manner, and a second hydraulic unit ( 21 ) of the hydraulic transmission branch being directly connected to a first spur-gear stage, and the first spur-gear stage being directly connected to the ring gear ( 15 ), the second hydraulic unit ( 21 ) being connectable to an output drive shaft ( 22 ), via a second spur-gear stage and a first operating range clutch ( 23 ), and the second sun gear ( 14 ) being connectable to the output drive shaft ( 22 ) via a third spur-gear stage with a second operating range clutch ( 27 ).