Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake
Reexamination Certificate
2011-04-26
2011-04-26
Lewis, Tisha D (Department: 3655)
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Fluid controlled mechanical clutch or brake
C475S159000
Reexamination Certificate
active
07931556
ABSTRACT:
The present invention relates to an automatic transmission (1) comprising at least one planetary stage (2) and at least one gear shifting element (3), wherein this gear shifting element (3) is disposed axially directly adjacent to the planetary stage (2), wherein a piston-cylinder arrangement (4) is provided for actuating the gear shifting element (3), wherein the planetary stage (2) comprises an internal gear (5), a sun gear (6) and a planet carrier (7), on which planet gears (8) are rotatably mounted, wherein the planet carrier (7) is connected non-rotatably to a transmission shaft (9), and wherein the pressure medium can be fed to the pressure chamber (10) of the cylinder (11) of the piston-cylinder arrangement (4) through a bore (12, 13) in the transmission shaft (9) and in the planet carrier (7).
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Brehmer Martin
Diosi Gabor
Haupt Josef
Ziemer Peter
Davis & Bujold P.L.L.C.
Lewis Tisha D
ZF Friedrichshafen AG
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