Planetary gear transmission systems or components – Differential planetary gearing – Differential or nondifferential planetary combined with...
Reexamination Certificate
2008-04-15
2008-04-15
Ho, Ha D. (Department: 3681)
Planetary gear transmission systems or components
Differential planetary gearing
Differential or nondifferential planetary combined with...
C475S018000, C074S66500G, C074S66500G
Reexamination Certificate
active
07357747
ABSTRACT:
A steering drive mechanism utilizes a pair of planetary gear arrangements between the input (or engine drive shaft) and the output shafts driving each wheel of a vehicle. The input is supplied to each sun gear in equal magnitude but opposite direction to account for driving the left or right wheels. The output shafts are connected to the planet carriers. In normal straight line driving, the ring gears are held fixed. The drive mechanism further comprises a steering motor that drives a steering gear that meshes with each ring gear. When the steering motor is activated, the steering gear rotates each ring gear in the same direction, so that the ring gear for one side increases the speed of the planet carrier and output shaft, while the ring gear for the opposite side decreases the output shaft speed.
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Ho Ha D.
Maginot Moore & Beck
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