US PATENT SUBCLASS 475 / 72
.~ Fluid pump and motor in one of plural paths to or from planetary gearing

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.~ Fluid pump and motor in one of plural paths to or from planetary gearing {6}
73  DF  .~.~> Plural fluid power paths to planetary gearing
74  DF  .~.~> Plural outputs
75  DF  .~.~> Three pumps or motors
76  DF  .~.~> Speed responsive control {1}
78  DF  .~.~> Interrelated fluid unit and gear control {1}
80  DF  .~.~> Plural speed ranges {1}

DEFINITION

Classification: 475/72

Fluid pump and motor in one of plural paths to or from planetary gearing:

(under subclass 31) Subject matter wherein the drive train* consists of a transmission under the class definition having two power paths, one of which is a fluid torque transmitting drive comprising means to pressurize a fluid and means responsive to such pressure to convert such pressure to useful mechanical work.

SEE OR SEARCH THIS CLASS, SUBCLASS:

23+, for this type of drive used for steering by driving.

329+, for other plural power path transmissions and see the notes thereunder.

SEE OR SEARCH CLASS

60, Power Plants,

325+, for pump and motor combinations per se. 477, Interrelated Power Delivery Controls, Including Engine Control,

52, for this combination together with prime mover control. [figure] [caption]output; pump; input; motor