US PATENT SUBCLASS 475 / 90
.~.~.~ Fluid pumped by differential gears

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}
84  DF  .~ Control of differential planetary gearing {3}
89  DF  .~.~ Fluid resistance controls relative rotation of outputs {1}
90.~.~.~ Fluid pumped by differential gears

DEFINITION

Classification: 475/90

Fluid pumped by differential gears:

(under subclass 89) Subject matter wherein the gears of the differential transmission* act as pumps, to pressurize a fluid contained therein, the resistance to flow of such fluid acting to retard relative rotation of the differential outputs. [figure]