Patent ID: 8133328

Claim:
Apparatus for cleaning a liquid storage tank, comprising: a. a tube configured with a channel for conveying a liquid; b. a shaft assembled within the tube and having a first axis; c. a first housing assembled rotatably to the tube and caused to rotate around the first axis by the shaft; d. a nozzle housing mounted to the first housing for being rotated by the shaft around a second axis that is substantially perpendicular to the first axis; e. a plurality of radial nozzles formed through a periphery of the nozzle housing; f. a plurality of downspray nozzles mounted to the first housing in a manner to rotate around the first axis, the downspray nozzles each residing substantially coplanar with the first axis; g. wherein the radial nozzles and the downspray nozzles are in fluid communication with the liquid conveyed within the tube; and h. wherein the first housing and the downspray nozzles rotate around the first axis and the nozzle housing and the plurality of radial nozzles rotate around the second axis.