Spray cleaning device

Claim 1

IN A TANK CLEANING DEVICE FOR CLEANING LIQUID STORAGE TANKS OF ALL SIZES HAVING A MANHOLE LID WITH AN OPENING THEREIN, A FLUID CONVEYING SOURCE, A HOSE CONNECTED WITH SAID POWER SOURCE, AN ELONGATED TUBULAR MEMBER OF SUBSTANTIALLY THE SAME DIAMETER AS SAID OPENING IN SAID MANHOLE LID ADAPTED FOR PROJECTING SUBSTANTIALLY VERTICALLY DOWNWARDLY INTO SAID TANK, THE UPPER END OF SAID TUBULAR MEMBER BEING CONNECTED WITH SAID HOSE, A SPRAY SECTION AT THE LOWER END OF SAID TUBULAR MEMBER HAVING AN UPPER SPRAY PORTION WITH A FIRST PLURALITY OF NOZZLES ARRANGED IN A CIRCLE AND INCLINED AT A DETERMINED STEEP ANGLE RELATIVE TO THE LONGITUDINAL AXIS OF SAID TUBULAR MEMBER, A SECOND PLURALITY OF CIRCULARLY ARRANGED NOZZLES AT A GREATER ANGLE OF INCLINATION THAN SAID FIRST NOZZLES, AND A LOWER SPRAY SECTION HAVING A PLURALITY OF NOZZLES ARRANGED IN A CIRCLE AND AT A STILL FURTHER INCREASED ANGLE OF INCLINATION, SAID SPRAY SECTION HAVING A LOWERMOST OPEN END AND A DETACHABLE SEALING MEANS CLOSING SAID OPEN END SO THAT CLEANING FLUID IS PRESSURE EJECTED FROM SAID HOSE AND PASSING THROUGH SAID ELONGATED TUBULAR MEMBER THROUGH SAID NOZZLES AT SAID VARIOUS ANGLES OF INCLINATION INTO SAID TANK, SAID NOZZLES ALL HAVING ABOUT THE SAME DIAMETER AND THE THICKNESS OF THE WALL OF SAID SPRAY SECTION BEING SUBSTANTIALLY GREATER THAN SAID DIAMETER.