Patent ID: 7220210

Claim:
A multiple speed automatic transmission for a vehicle, comprising: a compound planetary gear set including two single planetary gear sets of a first planetary gear set having operating members of a first sun gear, a first ring gear, and a first planet carrier, and a second planetary gear set having operational members of a second sun gear, a second ring gear, and a second planet carrier, wherein the compound planetary gear set forms, by directly connecting the second ring gear and the first planet carrier, a first operational element by the first and second sun gears, a second operational element by the second planet carrier, a third operational element by the first planet carrier and the second ring gear, and a fourth operational element by the first ring gear; a third planetary gear set of a compound planetary gear set having operating members of a small diameter sun gear, a large diameter sun gear, a third planet carrier commonly used therein, and a third ring gear commonly used therein, wherein the third planetary gear set forms a fifth operational element by the small diameter sun gear, a sixth operational element by the third planet carrier, a seventh operational element by the third ring gear, and an eighth operational element by large diameter sun gear; first and second clutches respectively transmitting a torque of the fourth operational element to the eighth operational element and the fifth operational element; third and fourth clutches respectively transmitting a torque of an input shaft to the sixth and eighth operational elements; a fifth clutch transmitting a torque of the input shaft to the second operational element; a first brake connecting the eighth operational element to a transmission housing; a second brake connecting the second operational element to the transmission housing; and an output member connected to the seventh operational element.