Combined centrifuge and filtering device

Claim 1

AN OIL PURIFYING APPARATUS FOR SEPARATING AIR AND GAS BUBBLES, HEAVY SOLIDS, MAGNETIC SOLIDS, AND OTHER MATERIALS FROM OIL WHILE MAINTAINING A FLOW OF OIL THERETHROUGH AT SUBSTANTIALLY CONSTANT PRESSURE, INCLUDING IN COMBINATION: A GENERALLY CYLINDRICAL CLOSED HOUSING WITH A GENERALLY VERTICAL AXIS, A SUMP AT ITS LOWER END, A TANGENTIAL INLET NEAR ITS UPPER END, AND A HOLLOW CAP PORTION AT ITS UPPER END HAVING A RESTRICTED, PRESSURE-PRODUCING AIR AND GAS OUTLET THEERTHROUGH; AN AXIALLY EXTENDING CLEAN-OIL OUTLET TUBE LEADING FROM NEAR THE UPPER END OF SAID HOUSING DOWN THROUGH A CENTRAL BOTTOM OUTLET THROUGH THE LOWER END OF SAID HOUSING; A GENERALLY CYLINDRICAL FILTER CARTRIDGE SURROUNDING SAID OUTLET TUBE AND COMMUNICATING WITH SAID OUTLET TUBE, FOR THE RADIALLY INWARD PASSAGE OF FILTERED OIL FROM SAID CARTRIDGE INTO SAID TUBE, SAID CARTRIDGE HAVING A LOWER LOW-FLOW-RATE PORTION AND AN UPPER HIGH-FLOW-RATE PORTION; MEANS FOR SPACING SAID FILTER CARTRIDGE RADIALLY INWARDLY FROM SAID HOUSING AND AXIALLY ABOVE SAID SUMP AND BELOW THE UPPER END OF SAID HOUSING; AN AXIAL CYLINDRICAL SHELL BETWEEN AND SPACED FROM BOTH SAID CARTRIDGE AND SAID HOUSING BETWEEN SAID SUMP AND SAID CAP PORTION AND HAVING AN UPPER PORTION ABOVE SAID INLET PROVIDING FOR RESTRICTED PASSAGE OF FLUIDS UP INTO SAID HOLLOW CAP, WHEREBY MOST OF THE OIL ENTERING SAID HOUSING THROUGH SAID INLET FLOWS DOWNWARDLY BETWEEN SAID HOUSING AND SAID SHELL AND THEN UPWARDLY INSIDE SAID SHELL INTO SAID FILTER CARTRIDGE; MAGNETIC MEANS SUPPORTED BENEATH SAID CARTRIDGE AND ABOVE SAID SUMP FOR CATCHING FERRO-MAGNETIC PARTICLES FROM SAID OIL AS THE OIL FLOWS AROUND THE LOWER END OF SAID SHELL AND UP INTO SAID SHELL; AND BY-PASS MEANS FOR PASSING OIL FROM THE INSIDE OF SAID CAP PORTION INTO SAID OUTLET TUBE WHEN AN EXCESSIVE OIL PRESSURE IS REACHED INSIDE SAID HOUSING.