US PATENT SUBCLASS 475 / 121
.~.~.~ Ratio change

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}
116  DF  .~ Fluid controlled mechanical clutch or brake {12}
118  DF  .~.~ Speed responsive control {3}
121.~.~.~ Ratio change {1}
122  DF  .~.~.~.~> Speed responsive valve control {2}

DEFINITION

Classification: 475/121

Ratio change:

(under subclass 118) Subject matter wherein the control is effective to change the speed ratio* of the transmission. [figure] [caption]to oil pump