Patent ID: 7115061

Claim:
A multiple stage transmission of a planetary design for an automatic transmission of a motor vehicle, the multiple stage transmission comprising: a housing (G) accommodating: a drive shaft ( 1 ) and a driven shaft ( 2 ); a first planetary gear set (P 1 ); a second planetary gear set (P 2 ); a third planetary gear set (P 3 ); at least third, fourth, fifth, and sixth rotatable shafts ( 3 , 4 , 5 , 6 ) and a fixed shaft ( 0 ); at least first, second, third, fourth, fifth and sixth shifting elements ( 03 , 04 , 14 , 15 , 36 , 56 ) including first and second brakes ( 03 , 04 ) and first, second, third and fourth clutches ( 14 , 15 , 36 , 56 ) which are selectively engageable to produce different gear ratios between the drive shaft ( 1 ) and the driven shaft ( 2 ) such that the transmission implements at least first, second, third, fourth, fifth, sixth and seventh forward gears and at least one reverse gear; the drive shaft ( 1 ) being permanently connected with a ring gear of the first planetary gear set (P 1 ) and, via a second clutch ( 15 ), with the fifth shaft ( 5 ) supporting a sun gear of the second planetary gear set (P 2 ) and a sun gear of the third planetary gear set (P 3 ), and the fifth shaft ( 5 ) being connectable, via the fourth clutch ( 56 ), with the sixth shaft ( 6 ); the sixth shaft ( 6 ), adjacent a first end, being connected with a spider of the first planetary gear set (P 1 ) and, adjacent a second end, being connectable, via the third clutch ( 36 ), with the third shaft ( 3 ) which is permanently connected with a ring gear of the second planetary gear set (P 2 ) and being connectable, via the first brake ( 03 ), to the housing (G); the driven shaft ( 2 ) being connected with a ring gear of the third planetary gear set (P 3 ) and a spider of the second planetary gear set (P 2 ); the fourth shaft ( 4 ) being permanently connected with a spider of the third planetary gear set (P 3 ) and being connectable, via the first clutch ( 14 ), with the drive shaft ( 1 ) and being connectable, via the second brake ( 04 ), to the housing (G); and a sun gear of the first planetary gear set (P 1 ) being non-rotatably connected with the housing (G) via a seventh shaft ( 0 ).