Multiple speed transmission producing a low-range

Details Multiple speed transmission producing a low-range Multiple speed transmission producing a low-range

2006-08-08

2006-08-08

Lewis, Tisha (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S276000

Reexamination Certificate

active

07086987

ABSTRACT:
A multiple speed transmission for an automotive vehicle includes an input and an output, a planetary gear system comprising first, second and third planetary gear units, each gear unit including a sun gear, a ring gear, planet pinions meshing with the sun gear and ring gear, and a carrier rotatably supporting the planet pinions. A forward clutch releasably connects the carrier of the second gear unit and the carrier of the third gear unit. A second clutch releasably connects the carrier of the first gear unit to the ring gear of the second gear unit. A third clutch releasably connects the ring gear of the third gear unit to the carrier of the second gear unit. First brake releasably holds the carrier of the third gear unit against rotation.

REFERENCES:
patent: 6634981 (2003-10-01), Raghavan et al.
patent: 6679803 (2004-01-01), Raghavan et al.
patent: 6709359 (2004-03-01), Usoro et al.
patent: 6743145 (2004-06-01), Usoro et al.
patent: 6758785 (2004-07-01), Raghavan et al.
patent: 6773371 (2004-08-01), Lee et al.
patent: 6846263 (2005-01-01), Lee et al.

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