US PATENT SUBCLASS 475 / 80
.~.~ Plural speed ranges

Current as of: June, 1999
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475 /   HD   PLANETARY GEAR TRANSMISSION SYSTEMS OR COMPONENTS

31  DF  FLUID DRIVE OR CONTROL OF PLANETARY GEARING {11}
72  DF  .~ Fluid pump and motor in one of plural paths to or from planetary gearing {6}
80.~.~ Plural speed ranges {1}
81  DF  .~.~.~> With constant speed ratio between input and one fluid unit {1}

DEFINITION

Classification: 475/80

Plural speed ranges:

(under subclass 72) Subject matter wherein the fluid drive provides a stepless speed ratio* variation capability and wherein a speed ratio* of a planetary transmission is also variable to result in the stepless variation at a plurality of speed ratio* levels. [figure]