Centrifugal separator

Claim 1

IN A CENTRIFUGAL SEPARATOR FOR DIVIDING A LIQUID SUSPENSION OF SOLIDS INTO DIRT POOR AND DIRT RICH FRACTIONS, INCLUDING A HOLLOW BODY OF CIRCULAR CROSS-SECTIONAL INTERIOR FORMING UNDERFLOW AND OVERFLOW OUTLETS AT ITS OPPOSITE ENDS AND HAVING AN ENTRANCE PORTION NEAR SAID OVERFLOW OUTLET, CLOSURE MEANS FOR ONE END OF SAID HOLLOW BODY INCLUDING SAID OVERFLOW OUTLET, TUBULAR MEANS DEFINING SAID OVERFLOW OUTLET AND PROJECTING INWARDLY OF SAID BODY ON THE AXIS THEREOF, THERE BEING AN INLET IN SAID ENTRANCE PORTION FOR TANGENTIAL INFLOW OF THE LIQUID SUSPENSION, THE LIQUID SUSPENSION PROGRESSING IN SWIRLING MOTION IN SAID HOLLOW BODY, INITIALLY ABOUT SAID TUBULAR MEANS AND PROGRESSING TOWARD SAID UNDERFLOW OUTLET, A DIRT POOR FRACTION SEPARATING AND MOVING IN A REVERSE SENSE LONGITUDINALLY OF THE BODY TO SAID OVERFLOW OUTLET; THE IMPROVEMENT RESIDING IN A RAMP TYPE OBSTRUCTION LOCATED IN THE ENTRANCE PORTION OF THE HOLLOW BODY AT THE WALL THEREOF ENCOUNTERED BY THE INFLOWING SUSPENSION AND CREATING A DISTURBANCE TO FLOW CAUSING TURBULENCE SUBSTANTIALLY THROUGHOUT THE LENGTH OF SAID HOLLOW BODY ALONG THE WALL THEREOF, SAID OBSTRUCTION PRESENTING AN IMPACT SURFACE OF LONGITUDINAL EXTENT TERMINATING AT ITS OPPOSITE ENDS WITHIN THE EXTREMITIES OF SAID TUBULAR MEANS FOR LIMITED IMPACT WITH EXTENDED TURBULENCE.