Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural drive ratios other than unity
Reexamination Certificate
2007-03-08
2010-12-07
Ho, Ha D. (Department: 3655)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural drive ratios other than unity
C475S284000
Reexamination Certificate
active
07846059
ABSTRACT:
An automatic transmission including a first number of dry clutches; a second number of brakes; a third number of actuators; and transfer elements. The transfer elements are connected to respective clutches and brakes by respective uninterruptible mechanical paths. The actuators are arranged to displace respective transfer elements to operate the dry clutches and brakes. The third number is less than a sum of the first and second numbers. The transmission can include an input to a drive unit; a gear set; a damper connecting the drive unit and gear set; and an uninterrupted torque path between the drive unit and gear set. The transmission can include: a fluid chamber; dry portions; a six speed gear set at least partly in the chamber; three shafts at least partially disposed in the chamber; and three sealing elements forming a fluid-tight seal among the shafts, chamber, and dry portions.
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Hemphill Jeffrey
Maucher Edmund
Ho Ha D.
Schaeffler Technologies GmbH & Co. KG
Simpson & Simpson PLLC
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