Patent ID: 8007392
Filing Date: 2011-08-30
Classification: F16H

Abstract:
1. An automatic transmission which changes the speed of rotation of an input shaft among multiple speeds to transmit the rotation to an output shaft through a single planetary gear set and a compound planetary gear set, both provided in a transmission case, the single planetary gear set comprising: a planet carrier coupled to the input shaft; a sun gear fixed to the transmission case; and a ring gear, the compound planetary gear set comprising: a first sun gear; a second sun gear; a second ring gear; a first pinion gear which is brought into meshed engagement with the first sun gear and the second ring gear; a second pinion which is brought into meshed engagement with the second sun pinion and the first pinion gear; and a carrier which supports the first pinion gear and the second pinion gear rotatably and revolvably, and the automatic transmission further comprising: