Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Reexamination Certificate
2007-07-19
2010-06-15
Lewis, Tisha D (Department: 3655)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
C475S323000
Reexamination Certificate
active
07736258
ABSTRACT:
The transmission has a plurality of members that can be utilized in powertrains to provide eight forward speed ratios and one reverse speed ratio. The transmission includes three planetary gear sets, six torque-transmitting devices, one fixed interconnection and a grounded member. The powertrain includes an engine and torque converter that is continuously connected to one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The six torque-transmitting devices provide interconnections between various gear members, and the transmission housing, and are operated in combinations of three to establish eight forward speed ratios and one reverse speed ratio.
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Carey Clinton E.
Hart James M.
Phillips Andrew W.
Raghavan Madhusudan
Wittkopp Scott H.
GM Global Technology Operations Inc.
Lewis Tisha D
Quinn Law Group PLLC
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