Pump inducers

Claim 1

THE COMBINATION WITH A CENTRIFUGAL PUMP HAVING AN IMPELLER WITH A CENTRAL SPLINE AND A SURROUNDING CASING, OF AN INDUCER ASSEMBLY FOR DELIVERING FLUID UNDER PRESSURE TO SAID PUMP, INCLUDING AN OUTER CASING ATTACHED TO THE PUMP CASING, AN INNER CASING WITHIN SAID OUTER CASING AND SPACED THEREFROM TO DEFINED THEREBETWEEN AN ANNULAR PASSAGE FOR DIRECTING FLUID TO THE IMPELLER, A ROTOR MOUNTED IN SAID INNER CASING AND HAVING VANES EXTENDING INTO THE ANNULAR PASSAGE, STRUTS DOWNSTREAM OF THE ROTOR AND EXTENDING BETWEEN THE INNER AND OUTER CASINGS TO SUPPORT THE INNER CASING, AND DRIVING MEANS FOR THE ROTOR POSITIONED WITHIN SAID INNER CASING AND INCLUDING A FIRST SHAFT JOURNALLED IN SAID INNER CASING AND HAVING A SPLINE MESHING WITH THE CENTRAL SPLINE ON THE IMPELLER, A GEAR CARRIED BY THE ROTOR AND REDUCTION GEAR MEANS SUPPORTED BY THE INNER CASING BETWEEN THE SHAFT AND THE GEAR, SAID OUTER CASING INCLUDING A SEPARABLE CASING EXTENSION SURROUNDING THE ROTOR AND REMOVABLE FROM THE REMAINDER OF THE CASING FOR ACCESS TO THE ROTOR, SAID REDUCTION GEAR MEANS INCLUDING A FIRST GEAR ON SAID SHAFT, A SECOND SHAFT JOURNALLED IN SAID INNER CASING IN OFFSET PARALLEL RELATION TO SAID FIRST SHAFT, SAID SECOND SHAFT HAVING AN INTERNAL GEAR IN MESH WITH THE FIRST GEAR, SAID SECOND SHAFT ALSO HAVING AN EXTERNAL GEAR THEREON AND SAID GEAR ON THE ROTOR MESHING WITH SAID EXTERNAL GEAR.