Automatic transmission

Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked

Reexamination Certificate

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Reexamination Certificate

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07955213

ABSTRACT:
An automatic transmission in which first to third clutches which can couple an input shaft to a first element of a first multiple planetary gear set and second and fourth elements of the second multiple planetary gear set, respectively, are arranged on a front side of the first multiple planetary gear set. Thus, it is possible to prevent a situation in which disengaging of the third clutch in the first speed causes the fourth element of the first multiple planetary gear set to rotate in reverse and generate a large relative rotation with the first element.

REFERENCES:
patent: 4660439 (1987-04-01), Hiraiwa
patent: 4711138 (1987-12-01), Miura et al.
patent: 5518465 (1996-05-01), Hiraiwa
patent: 6752738 (2004-06-01), Martin et al.
patent: 2001/0034284 (2001-10-01), Sugiura et al.
patent: 2010/0234164 (2010-09-01), Kato et al.
patent: 60-065943 (1985-04-01), None
patent: 07-094856 (1995-10-01), None
patent: 2000-046129 (2000-02-01), None
patent: 2001-263438 (2001-09-01), None
patent: 2002-213545 (2002-07-01), None

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