Automatic transmission

Details Automatic transmission Automatic transmission

2007-08-10

2009-02-10

Le, David D. (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S317000, C475S323000, C475S329000, C475S330000

Reexamination Certificate

active

07488269

ABSTRACT:
An automatic transmission having first and second groups of successive forward-drive positions for outputting a rotary motion a speed of which is higher than the speed of a rotary motion received from an input member, the first group being established by an engaging action of a first input clutch while the second group being established by an engaging action of a second input clutch, or first and second groups of successive forward-drive positions for reducing the speed of the rotary motion received from the input member, the first and second groups being established by an engaging action of a first and second input clutches respectively. The successive operating positions of the first group have respective speed ratios different from those of the second group. The automatic transmission is shiftable to a selected one of the successive operating positions of a selected one of the first and second groups.

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