Water driven cleaning device with double cleaning action

A water driven cleaning device comprising:

• a shell-shaped housing, a top compartment (44), a tight spot brush (41), an enclosed top (1) with an open bottom, a collar (2) secured at the open bottom by means of conventional bayonet connection (38), a water inlet (6), a bladed impeller (3) mounted for rotation and generally coaxially in said housing, nozzle (5) means converging into said housing for directing water generally tangentially onto the bladed impeller (3) to drive the impeller in rotation, said open bottom of the housing defining an outlet for water from said nozzle so that the water flows along a flow path from the impeller and then through said outlet, two rotary concentric brushes adjacent said open bottom housing, an outer annular brush (7) which is connected to an internal crown gear (4) surrounding a center brush (8) which is connected to an annular rotary platform (46), reduction gear means connecting said impeller (3) to the said center brush (8) for driving said center brush (8) in rotation at a speed less than the speed of rotation of the impeller (3), planetary gear means connecting said impeller (3) to the rotary outer annular brush (7) for driving said brush in opposite direction of said center brush (8).