Centrifugal pump impeller

Claim 1

A CENTRIFUGAL PUMP ROTOR-IMPELLER ASSEMBLY COMPRISING: AN ELONGATED HOLLOW SHAFT ROTATABLE ABOUT ITS LONGITUDINAL AXIS AND SUPPORTED FOR SUCH ROTATION AT LONGITUDINALLY SPACED JOURNAL PORTIONS THEREOF; A PLURALITY OF BLADES HAVING FORWARD, REARWARD, OUTER END, AND INNER END PORTIONS, SAID BLADES BEING RIGIDLY SECURED AT THEIR INNER END PORTIONS TO SAID SHAFT AND EXTENDING OUTWARDLY IN SPACED RELATIONSHIP FROM A CIRCUMFERENTIAL SECTION OF SAID SHAFT; DISC MEANS RIGIDLY SECURED WITH RESPEC TO SAID SHAFT AND EXTENDING PERIPHERALLY THEREABOUT IN ABUTTING RELATIONSHIP WITH A SUBSTANTIAL RADIAL EXPANSE OF THE REARWARD PORTIONS OF SAID BLADES, SAID DISC MEANS BEING AN INTEGRAL CONTINUOUS MEMBER; AND A SHROUD COMPRISED OF SHROUD SEGMENT MEANS EXTENDING BETWEEN THE FORWARD PORTIONS OF ADJACENT PAIRS OF BLADES AND SPACED FROM SAID DISC MEANS AND SAID SHAFT TO DEFINE GENERALLY RADIALLY OUTWARDLY DIRECTED PASSAGEWAYS HAVING GENERALLY AXIALLY FACING INLETS AND RADIALLY OUTWARDLY FACING OUTLETS ADJACENT THE OUTER END PORTIONS OF SAID BLADES.