US PATENT SUBCLASS 60 / 553
.~.~.~.~ With distinct piston or diaphragm exposed to pulsator pressure imparting feel to manual control

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}
552  DF  .~.~.~ Mechanical feedback to manual control controls power fluid to establish position of working member of master {2}
553.~.~.~.~ With distinct piston or diaphragm exposed to pulsator pressure imparting feel to manual control

DEFINITION

Classification: 60/553

(under subclass 552) Apparatus including a piston or diaphragm structure by which the pressure produced in the pulsator fluid by the actuation of the motor is directly imposed on a means opposing movement of the motor controller in a pressure increasing direction; whereby a "feel" of the condition of the pulsator liquid is conveyed to the operator of the device.