Patent ID: 8474081

Claim:
A device for cleaning a surface submerged in a fluid comprising: a vortex turbine mechanism, where the vortex-turbine mechanism comprises an inlet, an outlet, a vortex chamber, and a turbine, where fluid will flow from the inlet to the outlet and form a vortex in the vortex chamber when suction is applied to the outlet, where the turbine is located within the vortex chamber and not within the direct flow path between the inlet and outlet, where the turbine rotates as a result of the vortex created in the vortex chamber, and where the turbine produces drive power when it rotates, where the vortex-turbine mechanism further comprises a reverse flap and an orifice, where the reverse flap has an open position and a closed position, where the reverse flap allows fluid to flow through the orifice when in the open position, whereby fluid entering through the orifice reverses the rotation of the vortex and therefore the rotation of the turbine.