Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Orbit braked
Reexamination Certificate
2006-07-25
2006-07-25
Marmor, Charles A. (Department: 3681)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Orbit braked
C475S275000
Reexamination Certificate
active
07081066
ABSTRACT:
The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least eight forward speed ratios and one reverse speed ratio. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms. None of the members of the planetary gear sets are continuously grounded or continuously connected with any other member of the planetary gear sets. The powertrain includes an engine and torque converter that is continuously connected to at least one of the planetary gear members and an output member that is continuously connected with another one of the planetary gear members. The seven torque-transmitting mechanisms provide interconnections between various gear members and the transmission housing, and are operated in combinations of five to establish at least eight forward speed ratios and at least one reverse speed ratio.
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Bucknor Norman K.
Raghavan Madhusudan
Usoro Patrick B.
General Motors Corporation
Holmes Justin K.
Marmor Charles A.
Marra Kathryn A.
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