Automatic sewage disposal for individual homes and buildings

Claim 1

AN AUTOMATIC SEWAGE DISPOSAL UNIT COMPRISING: A PRIMARY SETTLEMENT TANK FOR RECEIVING LIQUID RAW SEWAGE; A FILTER COMPARTMENT DISPOSED ABOVE SAID PRIMARY SETTLEMENT TANK AND CONTAINING A BIOLOGICALLY ACTIVE FILTER BED; A FINAL SETTLEMENT TANK DISPOSED ADJACENT ONE OF SAID PRIMARY SETTLEMENT TANK AND FILTER COMPARTMENT; MEANS FOR CONVEYING THE LIQUID FROM SAID PRIMARY SETTLEMENT TANK TO SAID FILTER COMPARTMENT AND DISTRIBUTING IT OVER SAID FILTER BED; AND MEANS FOR CONDUCTING THE LIQUID FROM SAID FILTER BED EITHER IN RETURN TO SAID PRIMARY SETTLEMENT TANK FOR RECIRCULATION FROM THE LATTER TO SAID FILTER BED OR TO SAID FINAL SETTLEMENT TANK, SAID CONDUCTING MEANS COMPRISING: A FIRST CONDUIT HAVING AN INLET IN THE FILTER COMPARTMENT AND AN OUTLET IN THE PRIMARY SETTLEMENT TANK AND FORMING A FIRST INTERCONNECTING PASSAGEWAY BETWEEN SAID FILTER COMPARTMENT AND SAID PRIMARY SETTLEMENT TANK; A SECOND CONDUIT HAVING AN INLET IN SAID FIRST CONDUIT AND AN OUTLET IN THE FINAL SETTLEMENT TANK AND FORMING A SECOND INTERCONNECTING PASSAGEWAY BETWEEN SAID FILTER COMPARTMENT AND SAID FINAL SETTLEMENT TANK; AND VALVE MEANS (A) ADAPTED TO CLOSE THE OUTLET OF SAID FIRST CONDUIT WHEN THE LIQUID IN SAID PRIMARY SETTLEMENT TANK RISES TO A PREDETERMINED LEVEL, AS A CONSEQUENCE OF WHICH LIQUID PASSES FROM SAID FILTER COMPARTMENT THROUGH SAID SECOND INTERCONNECTING PASSAGEWAY INTO SAID FINAL SETTLEMENT TANK, (B) AND FURTHER ADAPTED TO OPEN THE OUTLET OF SAID FIRST CONDUIT WHEN THE LIQUID IN SAID PRIMARY SETTLEMENT TANK FALLS BELOW SAID PREDETERMINED LEVEL, AS A CONSEQUENCE OF WHICH LIQUID PASSES FROM SAID FILTER COMPARTMENT THROUGH SAID FIRST INTERCONNECTING PASSAGEWAY BYPASSING THE INLET TO SAID SECOND CONDUIT AND INTO SAID PRIMARY SETTLEMENT TANK.