Patent ID: 8303452

Claim:
An automatic transmission comprising: a first planetary gear set including a first rotating element, a second rotating element, and a third rotating element; a second planetary gear set including a fourth rotating element locked constantly stationary, a fifth rotating element, and a sixth rotating element; a third planetary gear set including a seventh rotating element constantly connected with the sixth rotating element to define a second rotating member, an eighth rotating element, and a ninth rotating element constantly connected with the third rotating element to define a first rotating member; an input shaft constantly connected with the first rotating element; an output shaft constantly connected with the second rotating element; and at least five friction elements including a first friction element capable of locking a rotation of the eighth rotating element in a stationary position, a second friction element configured to selectively connect the second rotating element with the fifth rotating element, a third friction element configured to selectively connect the second rotating element with the second rotating member, a fourth friction element configured to selectively connect the fifth rotating element with the eighth rotating element, and a fifth friction element configured to selectively connect the first rotating element with the fifth rotating element, wherein the automatic transmission is configured to achieve each of at least seven forward speed-ratios and one reverse speed-ratio, by a concurrent engagement of two friction elements which are selected from the five friction elements.