Turbine driven centrifugal compressor unit

Claim 1

IN A HERMETICALLY SEALED TURBINE DRIVEN CENTRIFUAL COMPRESSOR UNIT, THE COMBINATION COMPRISING A HOUSING, A SHAFT, FLUID TYPE BEARINGS SUPPORTED BY SAID HOUSING AND JOURNALLING SAID SHAFT INWARDLY OF EACH END THEREOF SO AS TO LEAVE OVERHUNG SHAFT END PORTIONS, AN IMPELLER ARRANGED WITHIN SAID HOUSING INTERMEDIATE SAID BEARINGS AND FAST TO SAID SHAFT, SYMMERTICAL BLADING ON OPPOSTIE AXIALLY FACING SIDES OF SAID IMPELLER, A PAIR OF SIMILAR TURBINE WHEELS ARRANGED WITHIN SAID HOUSING AND SEVERALLY NONROTATIVELY MOUNTED ON SAID OVERHUNG SHAFT END PORTIONS AND FACING IN OPPOSITE AXIAL DIRECTION, FLUID INLET PASSAGE MEANS OF SAID TURBINES THROUGH WHICH PRESSURIZED FLUID IS SUPPLIED, FLUID INLET PASSAGE MEANS FOR SAID IMPELLER THROUGH WHICH FLUID UNDER A HIGHER PRESSURE IS SUPPLIED, AND MEANS CONDUCTING FLUID LEAKING INTERNALLY FROM SAID IMPELLER INLET PASSAGE MEANS TOWARD SAID TURBINE INLET PASSAGE MEANS THROUGH SAID BEARINGS TO FLUID FLOAT SAID SHAFT.