A robotic pool cleaner for cleaning surfaces of a pool including a housing having an upper portion disposed over a base to define an interior chamber. The base includes a water inlet and the upper portion has at least one water discharge port for discharging filtered water. Rotatably-mounted supports support and guide the cleaner along a pool surface. A filter assembly filters water drawn through the water inlet. An electric motor mounted in the interior chamber is configured to move the cleaner on a pool surface. The electric motor receives power from a remote power source via a two-wire power cable. An electrical circuit having at least one orientation sensor is provided on-board the cleaner. The circuit is configured to provide an electrical signal to the remote power supply over the two-wire cable when the cleaner changes its orientation by a predetermined amount with respect to the pool surface.

An underwater station that may include a filter manipulator that is arranged to input, without human intervention, a filter into a pool cleaning robot that is located in a filter replacement position and to assist, without human intervention, in positioning the filter at a filtering position in which the filter is at least partially disposed within a fluid path formed between a first fluid opening and a second fluid opening of the housing thereby allowing the filter to apply a filtering operation on fluid that passes through the fluid path.

An underwater cleaning apparatus includes a front body having a filter and a rear body removably attachable to the front body. The rear body includes a motor having a shaft, an impeller configured to draw in water through an inlet opening in the front body, and a gap. The impeller is positioned in the gap in the rear body. A lock is configured to secure the rear body to the front body. A battery is configured to supply electrical power to the motor to drive the shaft and a power switch is configured to control the supply of electrical power to the motor.

The invention relates to a power lead for a swimming pool cleaning robot. Said power lead comprises a rotary connector and a buoyancy means supporting said rotary connector. An upper part of said buoyancy means is a cap shaped to slide under a swimming pool cover, under the effect of a traction exerted by the swimming pool cleaning robot on the buoyancy means through the power lead.

A suctioning device for suctioning impurities from the bottom of large artificial water bodies is provided. The suctioning device includes a flexible sheet configured to provide a structural frame; a plurality of first brushes depending from the sheet; a plurality of middle brushes; a plurality of lateral brushes; a plurality of suction points; a plurality of wheels configured to provide secondary support when the brushes are worn out; a plurality of collectors configured to gather the suctioned water into external suction lines; a plurality of internal suction lines configured to conduit the suctioned bottom water flow from the plurality of suction points to the plurality of collecting means; and a coupling device connecting the internal suction lines and the collectors, wherein a rate of the bottom water flow entering the suctioning device is the same or higher than a rate of water flow suctioned by an external pumping system.

A top-bottom pool cleaner is provided including a top housing and a nose attached to the top housing. The top housing including an exterior surface and a top surface having a filter. The nose defines a chamber for receiving and retaining water within the nose. The chamber of the nose receives water through the filter when the cleaner is submerged and retains water within the chamber when the cleaner reaches a top surface of the water from under the water surface, the retention of the water within the nose preventing the pool cleaner from oscillating above and below the top surface of the water.

A pool cleaning robot that may include first and second fluid openings, with a fluid path between the first fluid opening and the second fluid opening; a turbine at least partially disposed within the fluid path so as to extract energy from flow of fluid through the fluid path; an electrical generator; a rechargeable power source; and a controller that is arranged to direct the pool cleaning robot to be positioned in a certain location in which a flow level of fluid that is circulated by a pool fluid circulation system is higher than a flow level of the fluid within a majority of the pool, wherein when positioned at the certain location the fluid that is circulated by the pool fluid circulation system passes through the fluid path.

A pool cleaning robot may include a housing that has a first fluid opening and a second fluid opening; a filter that comprises a filter core that is at least partially located within the housing and comprises an one or more inlets, an one or more outlets and at least one filtering element positioned between the one or more inlets and the an one or more outlets; and a filter core rotator that is arranged to rotate the filter core during at least one period in which the filter core filters fluid that enters through the one or more inlets to output filtered fluid via the one or more outlets.

An underwater cleaning apparatus includes a front body having a filter and a rear body removably attachable to the front body. The rear body includes a motor having a shaft, an impeller configured to draw in water through an inlet opening in the front body, and a gap. The impeller is positioned in the gap in the rear body. A lock is configured to secure the rear body to the front body. A battery is configured to supply electrical power to the motor to drive the shaft and a power switch is configured to control the supply of electrical power to the motor.

An external docking station may be provided and may include a filter manipulator that is arranged to (i) input a filter into a pool cleaning robot that exited a pool and is located in a filter replacement position and to (ii) assist in positioning the filter at a filtering position in which the filter is at least partially disposed within a fluid path formed between a first fluid opening and a second fluid opening of the housing thereby allowing the filter to apply a filtering operation on fluid that passes through the fluid path.