Multi-speed transmission

Details Multi-speed transmission Multi-speed transmission

2011-08-09

2011-08-09

Le, David D (Department: 3655)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

Reexamination Certificate

active

07993235

ABSTRACT:
A transmission of the present invention has an input member, an output member, four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes. The torque transmitting devices are selectively engageable in combinations of at least three to establish at least ten forward speed ratios and at least one reverse speed ratio.

REFERENCES:
patent: 6955627 (2005-10-01), Thomas et al.
patent: 6991578 (2006-01-01), Ziemer
patent: 7011597 (2006-03-01), Haka
patent: 7018319 (2006-03-01), Ziemer
patent: 7601090 (2009-10-01), Shim

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