Abstract: An improved apparatus for cleaning large tanks and vessels, such as automotive and railway tank cars. A support frame has an air motor, a first gear box and a second gear box fixedly mounted thereon. A wash nozzle assembly is pivotedly attached to the support frame for movement in two directions. The air motor is operatively connected to the first gear box which, in turn, is operatively connected to the second gear box. Both the first gear box and the second gear box are operatively connected to the wash nozzle assembly to pivot the wash nozzle assembly in two directions, and thereby, direct cleaning liquid spray jets along both the longitudinal and latitudinal axes of the tank or vessel to be cleaned.

Abstract: An improved apparatus for cleaning large tanks or vessels, such as automotive and railway tank cars. A tiltable frame having a wash nozzle assembly pivotedly mounted thereon is pivotedly mounted above a fixed support frame. The tiltable frame has, fixedly mounted thereon, an air motor which is operatively connected to a first gear box which, in turn, is operatively connected to a second gear box. The first gear box is operatively connected to the wash nozzle assembly to move said assembly back and forth along the longitudinal axis of the tank or vessel to be cleaned. The second gear box is operatively connected to the fixed support frame to tilt the tiltable frame and thereby move the wash nozzle in both directions along the latitudinal axis of the tank or vessel to be cleaned.