Apparatus for cleaning tanks

Claim 1

APPARATUS FOR WASHING THE INTERIOR OF SHIP TANKS AND THE LIKE ADAPTED TO BE SUSPENDED BY A FLUID SUPPLY PIPE COMPRISING THE COMBINATION OF A HOUSING HAVING A GEAR BOX AND A MAIN CAVITY, SAID MAIN CAVITY HAVING AN INLET AND AN OUTLET, A ROTATABLE BUSHING CONNECTED TO SAID INLET, SAID BUSHING HAVING A FLANGE AT THE UPPER END THEREOF, A COUPLING MEMBER HAVING ONE END CONNECTED TO A FLUID SUPPLY PIPE FOR SUPPLYING FLUID TO SAID MAIN CAVITY, MEANS ATTACHING THE OTHER END OF SAID COUPLING MEMBER TO SAID BUSHING SO THAT SAID BUSHING AND SAID HOUSING ARE ROTATABLE WITH RESPECT TO SAID COUPLING MEMBER, THRUST BEARING MEANS POSITIONED BETWEEN SAID BUSHING FLANGE AND SAID ATTACHING MEANS, A TURBINE, A SHAFT EXTENDING BETWEEN SAID MAIN CAVITY AND SAID GEAR BOX SUPPORTING SAID TURBINE DIRECTLY ADJACENT SAID BUSHING, A BEARING OF WEARRESISTANT PLASTIC FOR SAID SHAFT POSITIONED IN THE WALL OF SAID HOUSING BETWEEN SAID MAIN CAVITY AND SAID GEAR BOX, CLEANING FLUID NOZZLE MEANS, MEANS FOR SUPPORTING SAID NOZZLE MEANS ON SAID OUTLET SO THAT SAID NOZZLE MEANS IS ROTATABLE WITH RESPECT TO SAID HOUSING, SAID SUPPORTING MEANS INCLUDING THRUST BEARING MEANS, A SPEED REDUCTION GEAR TRAIN POSITIONED IN SAID GEAR BOX AND HAVING ITS INPUT END CONNECTED TO SAID SHAFT, MEANS CONNECTING THE OUTPUT END OF SAID GEAR TRAIN TO SAID NOZZLE SUPPORTING MEANS FOR ROTATING SAID NOZZLE MEANS WITH RESPECT TO SAID HOUSING AND MEANS CONNECTED TO SAID LAST-MENTIONED MEANS SIMULTANEOUSLY ROTATING SAID HOUSING WITH RESPECT TO SAID COUPLING MEMBER.