Patent ID: 9458914
Filing Date: 2016-10-04
CPC Classification: F16H

Claim Text:
1. An automatic transmission that shifts power applied to an input member and outputs the shifted power to an output member, the automatic transmission comprising: a first planetary gear mechanism having a first rotary element, a second rotary element, and a third rotary element; a third planetary gear mechanism having a fourth rotary element, a fifth rotary element, and a sixth rotary element; a compound planetary gear mechanism formed by a second planetary gear mechanism and a fourth planetary gear mechanism, and having a seventh rotary element, an eighth rotary element, a ninth rotary element, and a tenth rotary element; a first clutch capable of engaging the third rotary element with the tenth rotary element and disengaging the third rotary element from the tenth rotary element; a second clutch capable of engaging the third rotary element with the sixth rotary element and disengaging the third rotary element from the sixth rotary element; a third clutch capable of engaging the second rotary element with the sixth rotary element and disengaging the second rotary element from the sixth rotary element; a fourth clutch capable of engaging the first rotary element and the fourth rotary element with the seventh rotary element and disengaging the first rotary element and the fourth rotary element from the seventh rotary element; a first brake that engages the tenth rotary element with an automatic transmission case so that the tenth rotary element can be held stationary with respect to the automatic transmission case, and that disengages the tenth rotary element from the automatic transmission case; and a second brake that engages the seventh rotary element with the automatic transmission case so that the seventh rotary element can be held stationary with respect to the automatic transmission case, and that disengages the seventh rotary element from the automatic transmission case, wherein the first rotary element is constantly coupled to the fourth rotary element, the fifth rotary element is constantly coupled to the ninth rotary element, the input member is coupled to the eighth rotary element, and the output member is coupled to the second rotary element.