Patent ID: 8113982

Claim:
A multiple speed power transmission comprising: an input shaft ( 10 ); a first epicylic gearing assembly ( 50 ) comprising: a first sun gear ( 52 ); a first planet carrier ( 56 ); a first ring gear ( 54 ); and a first set of planet gears ( 58 ) supported for rotation on the first planet carrier and in meshing engagement with both the first sun gear and the first ring gear; an output shaft ( 12 ) connected to the first ring gear ( 54 ); and second ( 20 ), third ( 30 ), and fourth ( 40 ) epicylic gearing assemblies each comprising first, second, and third rotating elements, wherein: the third rotating element of the second epicyclic gearing assembly ( 24 ) is connected to the second rotating element of the third epicyclic gearing assembly ( 36 ); the third rotating element of the third epicyclic gearing assembly ( 34 ) is connected to the third rotating element of the fourth epicyclic gearing assembly ( 44 ); the second rotating element of the second epicyclic gearing assembly ( 26 ) is connected to the first planet carrier ( 56 ); and the second rotating element of the fourth epicyclic gearing assembly ( 46 ), the first sun gear ( 52 ), and the input shaft ( 10 ) are mutually connected.