Nine speed automatic transmission with six...

Details Nine speed automatic transmission with six... Nine speed automatic transmission with six...

2008-04-29

2008-04-29

Pang, Roger (Department: 3681)

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

C475S280000, C475S302000

Reexamination Certificate

active

11233734

ABSTRACT:
A multi-speed transmission that achieves nine forward speed ratios and a reverse speed ratio has two planetary gear sets and a plurality of intermeshing gear members which may consist of two additional planetary gear sets or gear members arranged in a countershaft design. A speed ratio of an equal value but with an opposite direction of rotation is achieved at one of the gear members connected with one of the planetary gear members in a reverse ratio as in a first forward speed ratio. Six torque-transmitting mechanisms are employed.

REFERENCES:
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patent: 4395925 (1983-08-01), Gaus
patent: 4683776 (1987-08-01), Klemen
patent: 5503604 (1996-04-01), Pierce et al.
patent: 5954613 (1999-09-01), Park
patent: 6176803 (2001-01-01), Meyer et al.
patent: 7014589 (2006-03-01), Stevenson
patent: 7226381 (2007-06-01), Klemen
patent: 2004/0242366 (2004-12-01), Tabata et al.
patent: 2006/0223666 (2006-10-01), Gumpoltsberger

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