US PATENT SUBCLASS 475 / 23
.~.~.~ Hydrostatic type

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  DF  .~.~ Variable drive is fluid drive {1}
23.~.~.~ Hydrostatic type {1}
24  DF  .~.~.~.~> Plural pump-motor sets

DEFINITION

Classification: 475/23

Hydrostatic type:

(under subclass 22) Subject matter wherein the fluid drive train* includes an expansible chamber pump which transfers power via fluid to an expansible chamber motor to provide useful work.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72+, for the general combination of planetary gearing and hydrostatic drive.

SEE OR SEARCH CLASS

60, Power Plants,

325+, for a pump and motor combination, per se. [figure] [caption]pump motor; variable speed ratio range unit