US PATENT SUBCLASS 477 / 67
.~.~.~ Fill and empty-type fluid units

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

34  DF  TRANSMISSION CONTROL {15}
52  DF  .~ Including fluid drive {2}
53  DF  .~.~ Impeller-turbine-type {8}
67.~.~.~ Fill and empty-type fluid units

DEFINITION

Classification: 477/67

Fill and empty-type fluid units:

(under subclass 53) Subject matter wherein the fluid torque transmitting means may be emptied or filled for the purpose of changing the amount of slippage between the elements.

(1) Note. These devices are often used in place of a friction clutch*, for speed ratio* control.

SEE OR SEARCH CLASS

475, Planetary Gear Transmission Systems or Components,

34, 42, 50, 64, and 69 for planetary gearing and fill and empty-type fluid units in the absence of an engine control.