US PATENT SUBCLASS 475 / 91
.~ Fluid resistance inhibits relative rotation

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}
91.~ Fluid resistance inhibits relative rotation {5}
92  DF  .~.~> Fluid damper for reaction element
93  DF  .~.~> Valve inhibits fluid flow {7}
111  DF  .~.~> Planet clutched to fluid flywheel
112  DF  .~.~> Fluid container connected to planet pinion
113  DF  .~.~> Impeller-turbine type fluid unit used as brake

DEFINITION

Classification: 475/91

Fluid resistance inhibits relative rotation:

(under subclass 31) Subject matter wherein either the weight or momentum of a fluid mass or a fluids resistance to flow, is effective to retard the rotation of an element of a planetary transmission.

(1) Note. Both the subclasses hereunder and Class 192, Clutches and Power-Stop Control, subclass 61 contain planetary units including gear pumps so arranged that when fluid flow through the pump is unrestricted the unit slips, and as fluid flow is restricted relative rotation of the planetary elements is inhibited. Where the planet pinion of the unit drives a separate gear pump the art is found herein but where the planet pinion and cooperating sun and orbit together constitute the gear pump the art will be found in Class 192, subclass 61.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89, for control of a differential transmission* by fluid resistance.

SEE OR SEARCH CLASS

188, Brakes,

266+, for internal resistance motion retarders, per se. [figure]