US PATENT SUBCLASS 60 / 575
.~.~.~ Automatic trapping of fluid back of delivery piston forms temporary pulsator driving piston during one stage

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}
574  DF  .~.~ Automatic control of plural stage pressure generation or utilization {3}
575.~.~.~ Automatic trapping of fluid back of delivery piston forms temporary pulsator driving piston during one stage

DEFINITION

Classification: 60/575

(under subclass 574) Apparatus in which for one stage of operation a body of liquid is trapped back of a master piston feeding the output slave, the trapped body of liquid forming with the piston an ancillary pulsator of which the piston is the slave.