US PATENT SUBCLASS 60 / 556
.~.~.~.~ Power fluid input controller operated by piston or diaphragm acted on one side by pressure of a manual master and on the other by pressure of a power driven master

Current as of: June, 1999
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60 /   HD   POWER PLANTS

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
533  DF  .~ Pulsator {25}
547.1  DF  .~.~ With control of or by a separate power fluid, etc. {9}
555  DF  .~.~.~ Master movement of master produces a pressure that controls the power fluid {2}
556.~.~.~.~ Power fluid input controller operated by piston or diaphragm acted on one side by pressure of a manual master and on the other by pressure of a power driven master

DEFINITION

Classification: 60/556

(under subclass 555) Apparatus with a separate manual master and including a piston or diaphragm by which pressure from the power master is imposed on the manual master whereby a "feel" of the condition of the power pulse fluid is conveyed to the operator of the device.