US PATENT SUBCLASS 477 / 45
.~.~.~ Fluid pressure control

Current as of: June, 1999
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477 /   HD   INTERRELATED POWER DELIVERY CONTROLS, INCLUDING ENGINE CONTROL

34  DF  TRANSMISSION CONTROL {15}
37  DF  .~ Continuously variable friction transmission {8}
44  DF  .~.~ Belt-type {1}
45.~.~.~ Fluid pressure control {1}
46  DF  .~.~.~.~> Ratio change controlled {2}

DEFINITION

Classification: 477/45

Fluid pressure control:

(under subclass 44) Subject matter wherein the belt drive is regulated by a device operated by pressure of a liquid or gas, and the regulation affects or is affected by the operation of an engine*.