Patent ID: 7303500
Filing Date: 2007-12-04
Classification: F16H

Abstract:
1. A multiple speed transmission mechanism comprising: an input; an output; a first and second planetary gearsets, each gearset including a sun gear, a ring gear surrounding the sun gear, a set of planet pinions meshing with the sun gear and the ring gear, and a carrier on which the planet pinions are rotatably supported, the carrier of the first gearset being driveably connected to the ring gear of the second gearset; a third gearset comprising a first pinion driveably connected to the ring gear of the first gearset and a first gear driveably connected to the output and driveably engaged with the first pinion, and a second pinion driveably connected to the carrier of the second gearset and a second gear driveably connected to the output driveably engaged with the second pinion; a first clutch for alternately driveably connecting and disconnecting the input and the sun gear of the first gearset; a second clutch for alternately driveably connecting and disconnecting the input and the sun gear of the second gearset; a third clutch for alternately driveably connecting and disconnecting the input and the carrier of the first gearset; a first brake for alternately holding the sun gear of the first gearset against rotation on the transmission housing and releasing the sun gear of the first gearset; and a second brake for alternately holding the carrier of the first gearset against rotation on the transmission housing and releasing the carrier of the first gearset.