TANK WASHING APPARATUS

... 1,237,237. Tank washing apparatus. BUTTERWORTH SYSTEM Inc. 31 Oct., 1968 [19 Jan., 1968], No. 51613/68. Heading A4F. Apparatus for washing tanks includes a nozzle mechanism for spraying the interior of a tank and a control unit which is attached to and controls the nozzle mechanism in order to concentrate the spray on the dirtier areas of the tank, i.e. on sediment in the lower parts of the tanks. A nozzle 18 is mounted on sleeve 22 which is rotatable (through 360 degrees) about a pipe 19 connected to a supply of washing liquid, the nozzle 18 being rotatable (through 180 degrees) about an axis perpendicular to the axis of rotation of the sleeve 22. Control Unit. The unit, Fig. 5, is mounted on the nozzle mechanism outside the tank and a rotatable control shaft 24 extends from the unit through the pipe 19 and sleeve 22, the shaft 24 being attached to the sleeve 2 and being connected via a rod 32 to a rack 30 which moves up and down in accordance with up and down movement of the shaft 24 ...