Patent ID: 6071208
Filing Date: 2000-06-06
Classification: F16H

Abstract:
A change ratio power transmission having an input member driven in a first rotary direction, a rotatable output member, a first planetary gearset having a sun gear and a ring gear and inner and outer planetary pinions operatively meshing with each other, said inner planetary pinions operatively mesh with said sun gear and said outer planetary pinions operatively meshing with said ring gear, a carrier for said inner and outer planetary pinions drivingly connected to said input member, a second planetary gearset having a sun gear and a ring gear and planetary pinions which mesh with said sun and ring gears thereof and a carrier for said last mentioned planetary pinions, a drive connection between said rings gear of said first and second planetary gearsets, a third planetary gearset having a sun gear and a ring gear and planetary pinions which mesh with said sun and ring gears thereof and a carrier for said planetary pinions of said third planetary gearset drivingly connected to said output member, a drive member operatively connecting said last mentioned sun gears for rotation together, a drive connection drivingly interconnecting said carrier of said second gearset to said ring gear of said third gearset, a first clutch selectively engageable for locking said first gearset for rotation as a unit, a second clutch selectively engageable for drivingly said carrier of said first gearset to the carrier of said second gearset a first brake selectively operable to simultaneously hold said sun gears of said second and third gearsets for reaction, a second brake for selectively holding said carrier of said second gearset for reaction and a third brake for selectively holding said ring gears of said first and said second gearsets for reaction and a fourth brake for selectively holding said sun gear of said first gearset for reaction.