Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Reexamination Certificate
2007-02-09
2009-12-15
Ho, Ha D. (Department: 3655)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
Reexamination Certificate
active
07632206
ABSTRACT:
A multi-speed transmission with one reverse and nine forward gears has planetary gear sets, shafts and shifting elements. The input shaft couples the sun gear of gear sets (P2, P3). Shaft (3) couples the carrier of gear set (P2), is connectable to the housing, and shaft (5), which couples the ring gear of gear set (P1). Shaft (6) couples the carrier of gear set (P1), ring gear of gear set (P2), and sun gear of gear set (P4), and shaft (7) couples the carrier of gear set (P3), and releasably couples the output shaft, which couples the ring gear of gear set (P4). The sun gear of gear set (P1) couples the housing. Shaft (4) couples the ring gear of gear set (P3) and carrier of gear set (P4), and releasably couples the housing. Either shafts (1, 4), shafts (1, 7) or shafts (4, 7) are releasably coupled.
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Davis & Bujold P.L.L.C.
Ho Ha D.
ZF Friedrichshafen AG
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