Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural drive ratios other than unity
Reexamination Certificate
2007-11-13
2007-11-13
Marmor, Charles A. (Department: 3681)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural drive ratios other than unity
C475S271000
Reexamination Certificate
active
11203693
ABSTRACT:
An automatic transmission includes a first power path producing a first ratio of a speed of the input and a speed of a first power path output; a second power path producing a second ratio of a speed of the input and a speed of the second power path output, the second ratio being is less than the first ratio; a double planetary gear unit including first, second, third and fourth members, the second member being secured to the output; a first clutch being operable to connect the first member to the input through the first power path; a second clutch being operable to connect the fourth member to the input through the first power path; a third clutch being operable to connect the third member carrier to the input through the second power path; a fourth clutch being operable to connect the fourth member to the input through the second power path; a first brake being operable to hold the fourth member against rotation; and a second brake being operable to hold the third member against rotation.
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Goleski Gregory D.
Hoffman Donald E.
Thomas Steve G.
Ford Global Technologies LLC
Holmes Justin K.
Kelley David B.
MacMillan Sobanski & Todd LLC
Marmor Charles A.
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