Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural drive ratios other than unity
Reexamination Certificate
2005-01-04
2005-01-04
Lewis, Tisha (Department: 3681)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural drive ratios other than unity
C475S276000, C475S280000, C475S303000
Reexamination Certificate
active
06837823
ABSTRACT:
The family of transmissions has a plurality of members that can be utilized in powertrains to provide at least six forward speed ratios and one reverse speed ratio. The transmission family members include four planetary gear sets, two input clutches, seven or eight torque transmitting mechanisms, two fixed interconnections, and one grounded planetary gear member. The invention provides a low content multi-speed dual clutch transmission mechanism wherein the two input clutches alternately connect the engine to realize odd and even speed ratio changes. The torque transmitting mechanisms provide connections between various gear members, the fixed interconnections, the input clutches, the output shaft, and the transmission housing, and are operated in combinations of three to establish at least five forward speed ratios and at least one reverse speed ratio.
REFERENCES:
patent: 3398606 (1968-08-01), Utter
patent: 3503282 (1970-03-01), Peterson
patent: 3835732 (1974-09-01), Mori et al.
patent: 3971268 (1976-07-01), Murakami et al.
patent: 4027552 (1977-06-01), Murakami et al.
patent: 4046031 (1977-09-01), Ott et al.
patent: 4070927 (1978-01-01), Polak
patent: 4223571 (1980-09-01), Quemerais et al.
patent: 4395925 (1983-08-01), Gaus
patent: 4478106 (1984-10-01), Schreiner
patent: 4683776 (1987-08-01), Klemen
patent: 4709594 (1987-12-01), Maeda
patent: 5106352 (1992-04-01), Lepelletier
patent: 5133697 (1992-07-01), Hattori
patent: 5385064 (1995-01-01), Reece
patent: 5478291 (1995-12-01), Morisawa et al.
patent: 5497867 (1996-03-01), Hirsch et al.
patent: 5560461 (1996-10-01), Loeffler
patent: 5579883 (1996-12-01), Tsukamoto et al.
patent: 5599251 (1997-02-01), Beim et al.
patent: 5641045 (1997-06-01), Ogawa et al.
patent: 5651435 (1997-07-01), Perosky et al.
patent: 5879263 (1999-03-01), Haka
patent: 5924951 (1999-07-01), Winzeler et al.
patent: 5975263 (1999-11-01), Forsyth
patent: 6053839 (2000-04-01), Baldwin et al.
patent: 6071208 (2000-06-01), Koivunen
patent: 6083135 (2000-07-01), Baldwin et al.
patent: 6217474 (2001-04-01), Ross et al.
patent: 6342026 (2002-01-01), Takagi et al.
patent: 6354416 (2002-03-01), Eo
patent: 6402654 (2002-06-01), Lanzon et al.
patent: 2366495 (1978-06-01), None
patent: 9-126283 (1997-05-01), None
patent: 1384860 (1988-03-01), None
Lee Chunhao J.
Usoro Patrick Benedict
General Motors Corporation
Lewis Tisha
Marra Kathryn A.
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