US PATENT SUBCLASS 417 / 217
.~ Reversible flow pump


Current as of: June, 1999
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417 /   HD   PUMPS

212  DF  CONDITION RESPONSIVE CONTROL OF DRIVE TRANSMISSION OR PUMP DISPLACEMENT {7}
217.~ Reversible flow pump


DEFINITION

Classification: 417/217

(under subclass 212) Apparatus in which the pump has a mechanical pumping member (e.g., rotor or piston) driven from a rotary driving element and an inlet and an outlet; means being provided to change the flow of the pumped fluid without altering the direction of rotation of the driving element, i.e., the inlet under one condition of operation becomes the outlet under the other condition of operation and vice versa; the control means acting on the reversing means to cause its operation.