Patent ID: 8979702
Filing Date: 2015-03-17
Classification: F16H

Abstract:
1. A machine power transmission comprising: a planetary gear train having exactly four planetary gear sets including a first planetary gear set having a first sun gear, first ring gear, and first carrier, a second planetary gear set having a second sun gear, second ring gear, and second carrier, a third planetary gear set having a third sun gear, third ring gear, and third carrier, and a fourth planetary gear set having a fourth sun gear, fourth ring gear, and fourth carrier; an input to the planetary gear train and an output from the planetary gear train; and a first brake, second brake, third brake, first clutch, second clutch and third clutch associated with the planetary gear train, the first brake, second brake, third brake, first clutch, second clutch and third clutch being linked to the planetary gear train such that selective actuation of three of the first brake, second brake, third brake, first clutch, second clutch and third clutch provides five forward speeds and four reverse speeds of the transmission, wherein the first brake is linked to the second carrier and configured to selectively tie the second carrier to a first static structure to limit the rotation of the second carrier, wherein the second brake is linked to the third ring gear and configured to selectively tie the third ring gear to a second static structure to limit the rotation of the third ring gear, and wherein the third brake is linked to the fourth ring gear and configured to selectively tie the fourth ring gear to a third static structure to limit the rotation of the fourth ring gear.