Planetary transmission having common carrier for generating...

Details Planetary transmission having common carrier for generating... Planetary transmission having common carrier for generating...

2011-08-30

2011-08-30

Wright, Dirk (Department: 3655)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S903000

Reexamination Certificate

active

08007396

ABSTRACT:
An automatic transmission includes a first planetary gearset having a first planet pinion set rotatably supported on a common carrier and drivingly engaged with a first sun gear and a first composite gear that acts both as a first ring gear and a second sun gear. A second planetary gearset includes a second planetary pinion set rotatably supported on the common carrier and drivingly engaged with a third sun gear, the first composite gear and a second composite gear that acts both as a second ring gear and a third ring gear. A third planetary gearset has a third planet pinion set rotatably supported on the common carrier and drivingly engaged with a third sun gear and the second composite gear. A series of nested clutches and multiple bakes are employed to establish six forward speed ratios and one reverse ratio using a single carrier.

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