US PATENT SUBCLASS 475 / 22
.~.~ Variable drive is fluid drive

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

18  DF  STEERING BY DRIVING {6}
21  DF  .~ With infinitely variable drive {3}
22.~.~ Variable drive is fluid drive {1}
23  DF  .~.~.~> Hydrostatic type {1}

DEFINITION

Classification: 475/22

Variable drive is fluid drive:

(under subclass 21) Subject matter wherein the stepless ratio change is effected by the use of a hydraulic or pneumatic drive train*. [figure]