Automatic planetary gear transmission

Details Automatic planetary gear transmission Automatic planetary gear transmission

1989-11-21

1991-09-17

Herrmann, Allan D.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

475280, 475278, F16H 362

Patent

active

050491164

ABSTRACT:
A speed changing gear device for a motor vehicle, including a first and a second single-pinion type planetary gear unit and a third double-pinion planetary gear unit, which are coaxially disposed so as to provide different speed reduction ratios. The three gear units have respective first, second and third sun gears, respective first, second and at least one pair of planetary pinions, respective first, second and third ring gears, and respective first, second and third carriers. The first and third ring gears are fixed to each other for rotation as a unit, or connectable to each other by clutch means. The first sun gear and the second ring gear are fixed to each other or connectable by clutch means. The second and third carriers are fixed to each other or connectable to each other by clutch means. The second and third sun gears are fixed to each other or connectable by clutch means.

REFERENCES:
patent: 2911853 (1959-11-01), Sand
patent: 3971267 (1976-07-01), Murakami et al.
patent: 4089238 (1978-05-01), Forster et al.
patent: 4233861 (1980-11-01), Gaus et al.
patent: 4660439 (1987-04-01), Hiraiwa
patent: 4939955 (1990-07-01), Sugano
patent: 4963124 (1990-10-01), Takahashi et al.

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