Patent ID: 8597151

Claim:
A planetary gear train of an automatic transmission for a vehicle, comprising: a first shaft receiving torque of an engine; a second shaft disposed in parallel with the first shaft and selectively receiving a rotation speed of the first shaft as an inverse rotation speed; a first planetary gear set disposed on the first shaft and including a first rotation path selectively operated as a fixed element or an output element, a second rotation path directly connected to the first shaft and operated as an input element, and a third rotation path selectively operated as an output element; a compound planetary gear set formed by combining a second planetary gear set and a third planetary gear set, and including a fourth rotation path selectively connected to the third rotation path, a fifth rotation path selectively connected to the first rotation path, a sixth rotation path connected to an output gear so as to be continuously operated as an output element, and a seventh rotation path directly connected to the second shaft; three transfer gears interposed between the rotation shafts, and to transfer an inverse rotation speed to the second shaft and the rotation paths of the compound planetary gear set; and five frictional elements interconnecting the rotation paths or selectively connecting the rotation paths to a transmission housing; wherein the first planetary gear set is a single pinion planetary gear set having a first sun gear, a first planet carrier, and a first ring gear, wherein the second planetary gear set is a single pinion planetary gear set having a second sun gear, a second planet carrier, and a second ring gear, and wherein the third planetary gear set is a single pinion planetary gear set having a third sun gear, a third planet carrier, and a third ring gear, wherein the first rotation path includes the first sun gear, wherein the second rotation path includes the first planet carrier, wherein the third rotation path includes the first ring gear, wherein the fourth rotation path includes the second sun gear, wherein the fifth rotation path includes the second planet carrier and the third ring gear, wherein the sixth rotation path includes the second ring gear and the third planet carrier, and wherein the seventh rotation path includes the third sun gear.