Patent ID: 7614975

Claim:
A gear train of an automatic transmission for a vehicle having first and second shifting sections and a plurality of friction members, wherein: the first shifting section includes first and second simple planetary gear sets forming a first input path for directly receiving an input shaft rotation speed and an intermediate output path for outputting a reduced speed of the first shifting section; and the second shifting section includes third and fourth simple planetary gear sets forming a first intermediate input path for variably receiving an input shaft rotation speed, a second intermediate input path for receiving the reduced speed of the first shifting section through the intermediate output path and for variably receiving the input shaft rotation speed, and a final output path for outputting a modified speed of the second shifting section; and wherein: a sun gear of the first simple planetary gear set is connected to a sun gear of the second simple planetary gear set; and a ring gear of the first simple planetary gear set is connected to a planet carrier of the second simple planetary gear set, such that the first shifting section comprises four operational elements.