Multiple gear stage automatic transmission

Details Multiple gear stage automatic transmission Multiple gear stage automatic transmission

2006-10-03

2006-10-03

Lewis, Tisha (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S330000

Reexamination Certificate

active

07115063

ABSTRACT:
A multiple stage transmission of a planetary design having first, second and third planetary gear sets (P1, P2, P3), at least first, second, third, fourth, fifth sixth rotatable shafts (1, 2, 3, 4, 5, 6), first and second brakes (03, 04)and first, second, third and fourth clutches (14, 15, 36, 56). Selective engagement of the planetary gear sets (P1, P2, P3), the rotatable shafts (1, 2, 3, 4, 5, 6,), the brakes (03, 04) and the clutches (14, 15, 36, 56) produces different reduction ratios between the drive shaft and the driven shaft such that at least seven forward gears and at least one reverse gear are achieved.

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