Fluid pump flow bypass control

Claim 1

A CENTRIFUGAL PUMP HAVING A BLADED ROTOR MEMBER, A STATOR MEMBER COOPERATING THEREWITH TO DEFINE AN ANNULAR FLUID FLOW CHAMBER THEREBETWEEN, SAID STATOR MEMBER HAVING A FLUID INLET AND OUTLET TO SAID CHAMBER, A SOURCE OF FLUID CONNECTED TO SAID INLET, FIRST CONDUIT MEANS CONNECTING SAID INLET AND OUTLET, FLUID BYPASS CONTROL MEANS MOVABLE SAID CONDUIT MEANS TO BLOCK FLOW FROM SAID OUTLET TO SAID INLET WHILE PERMITTING FLOW FROM SAID INLET TO SAID OUTLET AND MOVABLE OUT OF SAID CONDUIT MEANS TO A BYPASS PORTION PERMITTING FLOW FROM SAID INLET TO SAID OUTLET AND BACK TO SAID INLET, AND MEANS FOR CONTROLLING THE MOVEMENT OF SAID BYPASS CONTROL MEANS, SAID LATTER MEANS INCLUDING MEANS BIASING AID CONTROL MEANS TO A FLUID PYPASS PERMITTING POSITION ESSENTIALLY OUT OF SAID CONDUIT MEANS, A SECOND SOURCE OF FLUID UNDER PRESSURE, SECOND CONDUIT MEANS OPERATIVELY CONNECTING SAID SECOND SOURCE TO SAID CONTROL MEANS TO ACT THEREON TO MOVE SAID CONTROL MEANS TO A BYPASS BLOCKING POSITION INTO SAID FIRST NAMED CONDUIT MEANS, AND MEANS FOR CONTROLLING FLOW THROUGH SAID SECOND CONDUIT MEANS.