US PATENT SUBCLASS 60 / 428
.~ Having condition responsive control in a system of separately operable power input pumps, pump motors, pump cylinders or pressure fluid sources

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

325  DF  PRESSURE FLUID SOURCE AND MOTOR {47}
428.~ Having condition responsive control in a system of separately operable power input pumps, pump motors, pump cylinders or pressure fluid sources {2}
429  DF  .~.~> With externally operated multiway valve changing the relationships of the motive fluid pressurizing or supplying means
430  DF  .~.~> Pressure or volume responsive means shifts the relationship

DEFINITION

Classification: 60/428

(under subclass 325) Apparatus including plural motive fluid pressurizing structures or pressure fluid sources including one, the delivery or output of which may be varied relative to that of another; the apparatus including a means responsive to a condition of the apparatus or to an external condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

375, for plural correlated pumps in a system including a self-cycling reciprocating output device.

402, for a system in which separate manual and motor driven pumps supply motive fluid to the output motor.

405, for a system in which a standby motive fluid supply means takes the load responsive to the failure of the main supply means.

SEE OR SEARCH CLASS 417, Pumps, appropriate subclass for the condition responsive control of a pump system.