Planetary gear transmission systems or components – Condition responsive control – Stepped – torque responsive ratio change
Reexamination Certificate
2006-10-17
2006-10-17
Lewis, Tisha (Department: 3681)
Planetary gear transmission systems or components
Condition responsive control
Stepped, torque responsive ratio change
C475S349000
Reexamination Certificate
active
07121973
ABSTRACT:
A planetary gear system includes a planetary gear assembly having a first planetary gear, a second planetary gear rotatable relative to the first planetary gear, and a torquing mechanism. The torquing mechanism generates a torsional spring force of the planetary gear assembly to cause the first planetary gear to rotate along a first direction and the second planetary gear to rotate along a second direction, opposite to the first direction. As a result, the teeth of the first planetary gear contact teeth of a corresponding first stationary ring gear and the teeth of the second planetary gear contact teeth of a corresponding second stationary ring gear. The torquing mechanism, along with the configuration of the planetary gear assembly, minimizes or eliminates the presence of gaps between the contacting teeth of the planetary assembly and the stationary gear rings and minimizes backlash within the planetary gear system.
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Lumpkin Ted
Wolf Tom
BainwoodHuang
HR Textron Inc.
Lewis Tisha
LandOfFree
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