Multi-speed transmission

Details Multi-speed transmission Multi-speed transmission

2006-03-14

2006-03-14

Pang, Roger (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

With synchronizing clutch or brake

C475S286000

Reexamination Certificate

active

07011597

ABSTRACT:
A planetary transmission includes four planetary gearsets, two of which are simple planetary gearsets and two of which are compound planetary gearsets. A first of the planetary gearsets has members selectively connectible with a ground or stationary member through a synchronizer clutch. A second, third, and fourth of the planetary gearsets have at least one member continuously interconnected with a ground or stationary member. A plurality of synchronizer clutches are employed between the planetary gearsets, which are manipulatable to establish at least seventeen forward speed ratios and one reverse speed ratio between an input shaft and an output shaft of the transmission.

REFERENCES:
patent: 3815445 (1974-06-01), Gorrell et al.
patent: 4531428 (1985-07-01), Windish
patent: 6176803 (2001-01-01), Meyer et al.
patent: 6758784 (2004-07-01), Lee et al.
patent: 6852059 (2005-02-01), Lee et al.

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