Multi-speed planetary transmission with up to ten forward speed ratios
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United States of America Patent
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Jan 29, 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 is provided that includes an input member, an output member, a stationary member, a first and a second compound planetary gear set. The first compound planetary gear set has a first, second, third, fourth, and fifth member. The second compound planetary gear set has a first, second, third, and fourth member. The first member of the second compound planetary gear set is continuously connected for common rotation with the output member. The second member of the second compound planetary gear set is continuously grounded to the stationary member. None of the members of the first compound planetary gear set are continuously connected for common rotation with any of the members of the second compound planetary gear set. Seven torque-transmitting mechanisms are selectively engagable in combinations of three to establish up to ten forward speed ratios between the input member and the output member.
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