Patent ID: 7718013

Claim:
An apparatus for cleaning an enclosed space comprising: an inlet-pipe for transporting cleaning-medium, having a thread on the outside of the inlet-pipe, a shielding-pipe, rotatable relative to the inlet-pipe, in close but spaced relation to, and surrounding, the inlet-pipe, and having a longitudinal opening through a surface of the shielding-pipe along at least a portion of its length, a cleaning-medium distributor at one end of the inlet-pipe, upper and lower nozzle-arms in fluid communication with the cleaning-medium distributor, a rotatable drive shaft extending through the inlet-pipe and operably connected to the cleaning-medium distributor, a controllable motor for rotating the drive shaft, a displacement nut to operably engage the thread on the inlet-pipe, the displacement nut being accessible through the longitudinal opening in the surface of the rotatable shielding-pipe, and displacement arms to operably connect the displacement nut to the upper nozzle-arms, wherein the nozzle-arms are arranged and constructed to move vertically and circularly in concert with the displacement nut when the motor rotates the drive shaft.