Method and apparatus for cleaning tanks

Claim 1

AN APPARATUS FOR CLEANING TANKS, COMPRISING IN COMBINATION. A ROTARY FRAME COUPLED FOR ROTATION TO A FIXED FRAME DEFINING A PLENUM CHAMBER; DRIVE MEANS HELD BY SAID FIXED FRAME INCLUDING A DRIVE SHAFT AND A PINION ON SAID DRIVE SHAFT; A FIRST GEAR DRIVEN BY SAID PINION, A HOLLOW SHAFT TURNED BY SAID FIRST GEAR, SAID HOLLOW SHAFT EXTENDING INTO SAID ROTARY FRAME AND CONNECTING MEANS BETWEEN SAID FIRST GEAR AND SHAFT AND SAID ROTARY FRAME SO THAT THE TURNING OF THE SHAFT WILL ALSO TURN THE ROTARY FRAME, SAID SHAFT BEING HOLLOW SO AS TO CARRY A FIRST FLUID THEREIN; A COUPLING PIECE FOR COUPLING TO A NOZZLE, SAID COUPLING PIECE INCLUDING FIRST AND SECOND PASSAGES THEREIN, ONE END OF SAID FIRST PASSAGE BEING COUPLED TO SAID HOLLOW SHAFT FOR RECEIVING SAID FIRST FLUID, FIRST COUPLING MEANS LINKING SAID HOLLOW SHAFT TO SAID FIRST FEED PASSAGE AND SECOND GAS RECEIVING MEANS ATTACHED TO SAID COUPLING PIECE FOR RECEIVING GAS FROM SAID PLENUM CHAMBER INTO ONE END OF SAID SECOND FEED PASSAGE, BEARING MEANS BETWEEN SAID COUPLING PIECE AND SAID ROTARY FRAME HOLDING SAID COUPLING PIECE IN SAID ROTARY FRAME PERMITTING FREE ROTATION OF SAID COUPLING PIECE AT AN ANGLE TO THE AXIS OF ROTATION OF SAID ROTARY FRAME; A COUPLING PIECE GEAR MOUNTED ON SAID COUPLING PIECE, GEARING SUPPORTED FROM SAID FIXED FRAME ENGAGING SAID COUPLING PIECE GEAR SO THAT THE TURNING OF SAID ROTARY FRAME CARRYING WITH IT SAID COUPLING PIECE ALSO CAUSES SAID COUPLING PIECE TO REVOLVE ABOUT ITS OWN AXIS OF ROTATION; AND, A NOZZLE ON THE END OF SAID COUPLING PIECE ANGULARLY DISPOSED WITH RESPECT TO SAID ROTARY FRAME AXIS OF ROTATION, SAID NOZZLE HAVING FIRST AND SECOND DUCTS COUPLED TO THE OTHER ENDS OF SAID FIRST AND SECOND PASSAGES OF SAID COUPLING MEANS, SO THAT FIRST AND SECOND FLUIDS CAN BE CONFLUENTLY DISCHARGED FROM SAID NOZZLE IN TWO AXES OF ROTATION SO AS TO COMPLETELY CLEAN THE INSIDE OF A TANK.