Patent ID: 7131924

Claim:
A multiple gear transmission of a planetary design for an automatic transmission of a motor vehicle, the multiple gear transmission comprising: an input shaft ( 1 ) and an output shaft ( 2 ) accommodated within a housing; single-web first, second and third planetary sets (P 1 , P 2 , P 3 ); third, fourth, fifth and sixth rotatable shafts ( 3 , 4 , 5 , 6 ); and six shifting elements ( 03 , 04 , 05 , 14 , 16 , 45 , 56 ), including brakes and clutches, such that selective engagement of pairs of the six shifting elements ( 03 , 04 , 05 , 14 , 16 , 45 , 56 ) produces different reduction ratios between said input shaft ( 1 ) and said output shaft ( 2 ) so that seven forward gears and two reverse gears can be implemented; wherein an input results from direct connection of the input shaft ( 1 ) with a sun gear of the first planetary set (P 1 ), an output results via the output shaft ( 2 ) connected with a web of the second planetary set (P 2 ), the third shaft ( 3 ) is permanently connected with a sun gear of the second planetary set (P 2 ) and a sun gear of the third planetary set (P 3 ), the fourth shaft ( 4 ) permanently connects a web of the first planetary set (P 1 ) with a ring gear of the third planetary set (P 3 ), the fifth shaft ( 5 ) is permanently connected with a ring gear of the first planetary set (P 1 ) and the sixth shaft ( 6 ) permanently connects a web of the third planetary set (P 3 ) with a ring gear of the second planetary set (P 2 ); the third shaft ( 3 ) is attachable to the housing by a first brake ( 03 ), the fourth shaft ( 4 ) is attachable to the housing by a second brake ( 04 ), the fifth shaft ( 5 ) is attachable to the housing by a third brake ( 05 ), a first clutch ( 16 ) detachably interconnects the input shaft ( 1 ) and the sixth shaft ( 6 ), a second clutch ( 56 ) detachably interconnects the fifth shaft ( 5 ) and the sixth shaft ( 6 ) and either one of a third clutch ( 14 ) detachably interconnects the input shaft ( 1 ) and the fourth shaft ( 4 ) with one another or a fourth clutch ( 45 ) detachably interconnects the fourth shaft ( 4 ) and the fifth shaft ( 5 ) with one another.