Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Reexamination Certificate
2009-02-17
2011-10-25
Le, David D (Department: 3655)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
C475S282000
Reexamination Certificate
active
08043189
ABSTRACT:
A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes. The torque transmitting devices are selectively engageable in combinations of at least two to establish at least nine forward speed ratios and at least one reverse speed ratio.
REFERENCES:
patent: 6176803 (2001-01-01), Meyer et al.
patent: 6984187 (2006-01-01), Biermann
patent: 6991578 (2006-01-01), Ziemer
patent: 7011597 (2006-03-01), Haka
patent: 7018319 (2006-03-01), Ziemer
patent: 2009/0192012 (2009-07-01), Phillips et al.
patent: 2009/0209387 (2009-08-01), Phillips et al.
Carey Clinton E.
Hart James M.
Phillips Andrew W.
Wittkopp Scott H.
GM Global Technology Operations LLC
Hlavka David J
Le David D
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