Planetary gear transmission systems or components – Input from independent power sources – Plural outputs
Reexamination Certificate
2005-11-22
2005-11-22
Wright, Dirk (Department: 3681)
Planetary gear transmission systems or components
Input from independent power sources
Plural outputs
Reexamination Certificate
active
06966859
ABSTRACT:
A transmission has an HMT which is in parallel with an HST both driving two planetaries which are used for forward/reverse and for differential steer. A two or three mode HMT is created by having a first HST in parallel with two or three mechanical power paths defined by separate clutches. One clutch has a speed reversing gear to produce reverse output speed. A four-element planetary sums the parallel flow and delivers variable speed and torque to two output shafts. The differential steer is created by two planetaries connected with the outputs of the HMT and a second HST. The planetaries have a speed reversing gear on one power path connection. The second HST controls the differential speed between the output shafts by adding speed to one and subtracting speed from the other.
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Sauer-Danfoss Inc.
Wright Dirk
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