Multi-speed planetary transmission with two compound planetary gear sets
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United States of America Patent
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May 14, 2013
Grant Date -
Aug 25, 2011
app pub date -
Nov 29, 2010
filing date -
Feb 25, 2010
priority date (Note) -
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Abstract
A multi-speed transmission includes an input member, an output member, a stationary member, and a first and a second compound planetary gear set. The first compound planetary gear set has a first, a second, a third, a fourth, and a fifth member. The second compound planetary gear set has a first, a second, a third, and a fourth member. The first member of the second compound planetary gear set is continuously connected for common rotation with the output member. An interconnecting member continuously connects the first member of the first planetary gear set for common rotation with the second member of the second planetary gear set. The transmission includes seven torque-transmitting mechanisms that are engagable to establish up to fifteen forward speed ratios between the input member and the output member.
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