US PATENT SUBCLASS 60 / 574
.~.~ Automatic control of plural stage pressure generation or utilization

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.~.~ Automatic control of plural stage pressure generation or utilization {3}
575  DF  .~.~.~> Automatic trapping of fluid back of delivery piston forms temporary pulsator driving piston during one stage
576  DF  .~.~.~> Of separate movement of plural delivery pistons {1}
578  DF  .~.~.~> Unitarily movable displacer delivers fluid from two delivery chambers, one chamber being ineffective under high pressure delivery

DEFINITION

Classification: 60/574

(under subclass 533) Apparatus comprising structure of the master or slave that, responsive to the position of an element or condition of the fluid provides a shift in the rate of movement of the actuator driving the master or of the output member of the slave relative to the rate of displacement of pulse fluid.

SEE OR SEARCH THIS CLASS, SUBCLASS:

557+, for a system in which pressurizing fluid from a manual master provides the initial drive of a slave and starts a power driven master for subsequent drive of the slave;

563+, for a system in which motive fluid first drives a motor

directly and subsequently drives a master that drives the slave;

565+, for an output driven successively by a master and nonmaster means.

SEE OR SEARCH CLASS 188, Brakes,

347, for a fluid brake for a road vehicle operated by a pulsator having a quick slack take-up operation followed by a slower high pressure actuation.