Combination pump and separator

Claim 1

A COMBINED PUMP AND SEPARATOR FOR CONTAMINATED FLUID COMPRISING A HOUSING HAVING A GENERALLY FRUSTOCONICAL SHAPED CHAMBER THEREIN, MEANS DEFINING A CENTRAL FLUID INLET IN SAID HOUSING COMMUNICATING WITH SAID CHAMBER, A SCROLL-TYPE FLUID DISCHARGE PASSAGE GENERALLY SURROUNDING SAID INLET AND COMMUNICATING WITH SAID CHAMBER, SAID CHAMBER HAVING A GENERALLY SMOOTH PERIPHERAL WALL DIVERGING TOWARDS AN ELARGED BASE PORTION OF SAID HOUSING, AND IMPELLER, MEANS IN SAID BASE PORTION FOR ROTATABLY SUPPORTING SAID IMPELLER WITHIN SAID CHAMBER, SAID IMPELLER INCLUDING A CONICALLY SHAPED HUB MEMBER, THE AXIS OF WHICH IS GENERALLY ALIGNED WITH SAID INLET, A FRUSTO-CONICAL MEMBER HAVING ITS CONVERGED END IN SEALING RELATION WITH SAID INLET AND SPACED FROM AND GENERALLY SURROUNDING SAID CONICAL HUB, SPIRAL VANES BETWEEN SAID CONICAL HUB AND SAID FRUSTO-CONICAL MEMBER PROVIDING A FIRST STAGE PUMP MEANS, AND A PLURALITY OF BLADES EXTENDING REDIALLY OUTWARDLY FROM AND CARRIED BY SAID FRUSTO-CONICAL MEMBER, SAID BLADES HAVING EDGES ADJACENT TO AND GENERALLY PARALLEL WITH SAI D CHAMBER WALL, SAID BLADES PROVIDING A CENTRIFUGAL SEPARATING MEANS BETWEEN SAID FRUSTO-CONICAL MEMBER AND SAID CHAMBER WALL; MEANS DEFINING A PERIPHERAL CAVITY IN SAID HOUSING, SAID CAVITY. BEING TANGENTIALLY DISPOSED TO SAID CHAMBER AND ADJACENT TO THE BASE PORTION OF SAID HOUSING, A DOWNWARDLY DEPENDING SUMP COMMUNICATING WITH SAID CAVITY, WHEREBY FLUID IS DRAWN THROUGH SAID INLET INTO SAID FIRST STAGE PUMP MEANS AND DISCHARGED THROUGH SAID CENTRIFUGAL SEPARATING MEANS INTO SAID SCROLL-TYPE DISCHARGE PASSAGE WHILE CONTAMINANTS ARE SEPARATED FROM THE FLUID AND DISCHARGED TANGENTIALLY OUTWARDLY INTO SAID CAVITY AND SUMP.