US PATENT SUBCLASS 475 / 128
.~.~.~ Valving controls shift timing

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}
116  DF  .~ Fluid controlled mechanical clutch or brake {12}
127  DF  .~.~ Pressure regulation {2}
128.~.~.~ Valving controls shift timing {1}
129  DF  .~.~.~.~> With fluid accumulator

DEFINITION

Classification: 475/128

Valving controls shift timing:

(under subclass 127) Subject matter wherein means is provided to regulate the speed or sequence of engagement or disengagement of a clutch* or brake*.

SEE OR SEARCH CLASS

477, Interrelated Power Delivery Controls, Including Engine Control, especially

143+, for shift timing control combined with motor control. [figure] [caption]clutch motors; control valves; time; time; time