Abstract: Automatic swimming pool cleaners are detailed. The cleaners may employ filter bags with novel stiffeners to help retain their optimal debris-collection shapes in use. They additionally may include bags made of material having sanitizing properties or additives, allowing water sanitization to occur as water flows through the bags themselves. Cleaners described herein further may include discs having generally radial but non-linear slits to facilitate navigation in particular conditions and fix buoyant material within a collar by which a bag is attached to a body of the device.

Abstract: Advantageous apparatus, are provided for facilitating maintenance of a automated pool cleaning device. More particularly, an improved automated pool cleaning device is provided, according to the present disclosure. The device, generally, includes a facially accessible quick-release roller assembly, a bucket-type filter assembly, and a windowed top access lid assembly. The improved roller assembly and filter assembly are easily accessible for maintenance purposes. Furthermore, the windowed lid assembly provides visual feedback as to when the filter assembly needs to be cleaned.

Abstract: A suction device is disclosed for thoroughly cleaning the a bottom surface of a structure, covered with a non-porous plastic liner, that contains a body of water larger than 15,000 m3 for recreational use, with color, transparency and cleanness characteristics similar to swimming pools or tropical seas, said device operating by suctioning impurities from the bottom surface by a pumping system of said the structure.

Abstract: This invention discloses a roller brush used in swimming pool cleaner, including the roller body and the roller brush wrapped around the roller body. The inner side of roller brush in contact with the roller body outer surface. The roller body has a number of detent posts or grooves. The roller brush inner surface has a number of corresponding grooves or posts. Certain number of detent posts engages with grooves enable the roller brush and roller body positive interlock. For this reason, this roller brush invention allows positive and synchronize drive between roller body and roller brush, avoiding slipping drive. Moreover, this invention has simple construction, easy manufacture and assembly. This invention does not need to apply too much tension on the roller brush, reducing the flexible roller brush aging rate. It is therefore product life extended and maintenance cost lowered.

Abstract: The invention discloses a process to implement and maintain water bodies larger than 15,000 m3 for recreational use, which comprises the following steps: a.—providing a structure able to contain a large water body larger than 15,000 m3; b.—feeding the structure of step (a) with inlet water; c.—measuring water pH; d.—adding an oxidizing agent to the water contained in the structure of step (a), e.—adding a flocculating agent in concentrations within 0.02 and 1 ppm with maximal frequencies of 6 days and cleaning the bottom of the structure of step (a) with a suction device to remove precipitated impurities from the bottom of said structure, and; f.—generating a displacement of surface water containing impurities and surface oils by means of the injection of inlet water according to step (b), which generates said displacement in such a way to remove said surface water arranged in the structure of step (a), which together with step (e) replaces traditional filtering.

Abstract: A self-propelled cleaning apparatus for cleaning a submerged surface of a pool or tank includes a housing having a front portion as defined by the direction of movement of the apparatus when propelled by a water jet, an opposing rear portion and adjoining side portions defining the periphery of the apparatus, and a baseplate with at least one water inlet. Rotationally-mounted supports are coupled proximate the front and rear portions of the housing to enable movement of the apparatus over the submerged surface. A water pump is configured to draw water and debris from the pool through the inlet for filtering. A stationary directional discharge conduit is in fluid communication with the pump and has at least one discharge opening through which a pressurized stream of water forming the water jet is directionally discharged at an acute angle with respect to the surface over which the apparatus is moving.

Abstract: The invention relates to a motorized robot for cleaning swimming pools, comprising: means (2) for moving the robot, having a surface (3) for making contact with a movement surface submerged in the swimming pool; means (4) for generating a circulation of fluid in the robot, comprising an opening for the suction (5) of said fluid, and an opening for the backflow (6) of the aspirated fluid; a conduit (7) of fluid connecting the suction and backflow openings; means for generating (8) a flow of said fluid in the conduit; a strut for lifting at least part of the contact surface (3) from the movement surface, said strut being mobile between a first inactive position in which the strut is retracted inside the robot and a second active position in which the strut projects past the contact surface of the movement means in such a way that part of said contact surface can no longer be in contact with the movement surface; and means for controlling (10) the movement of the strut between its active and inactive positions,

Abstract: A transversely elongated mounting bar curved rearwardly from a centerline and mounting longitudinally projecting bristles on the front side thereof to terminate in free ends deposed in a working plane.

Abstract: An aquarium cleaning device structured for use with glass or plastic aquarium walls, enabling a dislodging and freeing of debris from the walls, while also simultaneously enabling a collecting of dislodged and freed debris for subsequent removal. The cleaning device includes a frame providable of a rigid, possibly closed, and flattened loop, and a netting material, each of which are preferably sandwiched between two scrubbing pads. An elongated handle portion is fixable to the rigid loop and scrubbing pads, and arranged for secure grasping by a user such that aquarium wall cleaning activities may be conducted. This abstract is provided to comply with rules requiring an abstract, and is submitted with the intention that it will not be used to interpret or limit the scope and meaning of the claims.

Abstract: Detailed are swimming pool cleaners and components including discs and bumpers. Discs may include upwardly-extending hooks or similar features connecting directly with the bumpers. The direct connections additionally may be configured to allow substantial (i.e. non-trivial) upward movement of the discs from their normal locations while preventing substantial downward movement of the discs that might cause the discs undesirably to fold in use.

Abstract: Disclosed herein is an improved pool cleaning vehicle. The vehicle includes a housing, a bottom frame and a filter bag between the housing the bottom frame and attached to the bottom frame. The vehicle includes an intake system for causing water to enter the vehicle housing and to trap dirt and debris in the filter bag. The intake system includes more than one intake, which are typically mounted front and aft of the vehicle. The vehicle includes an outlet for flowing water passing through the filter bag back into the pool. Of course, both of the intake and outlet ports are in communication with the filter bag. The housing typically includes a bottom frame. Both the housing and the bottom frame have side openings defining vents, which serve as side intake ports. In an exemplary embodiment, the intake ports include a duct attached thereto. The duct has an open duct intake. In another exemplary embodiment, the front and/or aft intake port include a duct.

Abstract: An automated self-propelled pool cleaner having a housing, a water pump for moving water through the housing, drive means for moving the pool cleaner over the surface of the salt water pool to be cleaned, and an integral electrochemical chlorine generator mounted in the housing, includes a processor/controller that is programmed to activate the chlorine generator, the pump and drive means in predetermined operational sequences that minimize wear and tear on the water pump and drive means, while at the same time distribute and maintain a safe level of sanitizing chlorine in the pool, to thereby obviate the need for an in-line chlorinator or other chemical additive treatments; an optional automated sensor device can be provided to activate a secondary maintenance program which enables the pool cleaner to operate over prolonged periods of time as the sole means for filtering and sanitizing the pool water.

Abstract: The invention relates to a rolling apparatus for cleaning an immersed surface comprising a hollow body; rolling members; a filtration chamber which is provided in the hollow body; a motorized pumping device configured for generating a flow of liquid between a liquid inlet (9) and a liquid outlet which are connected, wherein it comprises a directional flux guide (91) which is mounted for rotation on a liquid outlet (10) about an axis of rotation and which has a shape configured for orientating the current of liquid which is discharged via this propulsion outlet (10) through this flux guide (91) so that it creates, by means of reaction, in the region of an outlet of the flux guide, forces whose resultant has a non-zero drive component of the apparatus parallel with the immersed surface; an actuator for rotatably driving said flux guide (91); and a unit for controlling said actuator for rotatably driving said flux guide (91).

Abstract: A submarine in-situ net cleaner includes a skid chassis (1) adapted for smooth and snare free sliding across the surface of the net (2), a buoyancy device (3) associated with the chassis to provide the cleaner with buoyancy, a driving device (4) adapted to cooperate with the net (2) and manoeuvre the cleaner about the surface of the net, a propulsion device (5) adapted to propel the cleaner onto and maintain contact with the net (2) and a cleaning device (6) adapted to remove contaminants from the net including marine fouling from the surface of the net so as to clean the net.

Abstract: In a working method for a cleaning device (2) that moves back and forth in a swimming pool (1), control thereof is such that the cleaning device (2) moves from a starting position at a low speed in a forward direction V in a first pass in a first cleaning path (4) until it runs up to a pool wall (3), wherein the distance D1 traversed along the first cleaning path is measured or determined. The cleaning device (2) is then guided to a second cleaning path (5) deviating from or offset relative to the first cleaning path (4) in a second pass, initially at a low speed, whereupon the cleaning device then moves in a backward direction along the second cleaning path (5) at a high speed until the distance Dz traversed is smaller than the distance D1 traversed in the previous pass by an amount A.

Abstract: Devices for cleaning vessels, especially swimming pools, are discussed. The devices may include repositionable in-line valves, with the valves typically moving laterally (from side to side) and changing the initial direction of the main fluid-flow path through the valves and corresponding cleaner bodies. Asymmetric feet may be utilized as part of the devices, whose bottom bearing surfaces may include elongated strips of material placed parallel to the normally-forward direction of travel of the devices. Discs of non-uniform flexibility also may be employed, and blocking tabs or gripping material may be used to inhibit undesired backward movement of a cleaner when its operation commences.

Abstract: Swimming pool cleaners, and associated hoses and connectors used with swimming pool cleaners may include a lock mechanism for releasably locking multiple hose segments or other components together in varying, discrete locked positions, such that a user can adjust the connection between the components to obtain a fluid tight joint. In these or other embodiments, one or both components can include an improved sealing structure that may facilitate forming such a fluid tight joint.

Abstract: Separate covers for protruding portions of discs of automatic swimming pool cleaners are addressed. The covers may be placed onto protrusions, such as fins, and removed from the fins as needed. Version of the covers are made of material more rigid and having lower coefficient of friction than the fins to discourage lateral bending of the fins and decrease frictional contact of the fins with pool surfaces.

Abstract: A device with a squeegee configuration configured to clean or treat surfaces submersed in liquid is described. The squeegee configuration is preferably contoured to wipe contoured surfaces or flexible such as to conform to a variety of contoured surfaces. The squeegee configuration can be configured with bristles, a sponge or scouring elements. In further embodiments of the invention, the squeegee configuration is configured to draw a vacuum while wiping the surfaces.

Abstract: A method and apparatus for the cleaning of an underwater surface, such as a hull. The method and apparatus enables cleaning to be conducted while mitigating the release of removed material into surrounding waters. The integrated apparatus includes a cleaning deck for removing fouling from the underwater hull surface, and a pre-processing deck with integrated components for the processing of cleaning effluents. According to the method and apparatus, materials removed by the shroud are sucked into the pre-processing deck, crushed, and separated into a separator effluent that may be recycled to the shroud, and a concentrate, which is discharged to a land treatment unit for further processing.

Abstract: The invention relates to an apparatus for cleaning a surface which is immersed in a liquid, comprising a hollow body, guiding and driving members, a filtration chamber in the hollow body, at least one liquid inlet, at least one liquid outlet out of the hollow body, at least one axial pumping propeller, a single reversible electric motor whose drive shaft, in order to move it, is simultaneously mechanically connected to at least one motorized member and to each pumping propeller. In a first rotation direction of the drive shaft, each motorized member is driven in a forward direction, and each pumping propeller generates the flow of liquid in the normal direction ensuring the cleaning of the immersed surface. In a second rotation direction of the drive shaft, each motorized member is driven in a backward direction opposite the first direction.

Abstract: The invention relates to an apparatus for cleaning a surface which is immersed in a liquid comprising a hollow body, guiding members defining at least one axle, a filtration chamber, at least one electric drive motor, a control unit which is configured to control each drive motor in at least one direction at a speed selected from: at least a first speed at which the apparatus is in a first movement position in accordance with a first predetermined trajectory, at least a second more rapid speed at which the apparatus is in a second nosed-up movement position in accordance with a second predetermined trajectory which is different from said first trajectory.

Abstract: An automatic pool cleaner includes a housing having a bottom, an outer surface and an interior, at least two wheels connected to the housing and supporting the housing for rolling movement on a support surface with the bottom facing the support surface, a propulsion system in the interior configured to move the pool cleaner along the support surface, a suction inlet, and a scrubbing panel connected to the housing. The scrubbing panel includes at least one flexible panel and a resilient stiffener connected to the flexible panel that is configured to bias a planar portion of the flexible panel against the support surface when the wheels support the housing on the support surface.

Abstract: Disclosed herein is a pool cleaning an electric pool cleaning vehicle having a drive assembly and including an advanced system for draining water from the vehicle as the vehicle is removed from a pool of water. The vehicle includes a housing defining a body shell and the body shell having an interior cavity and an electrical power cord to supply power to the vehicle having a connection point on the vehicle. A filtering system is located within the body cavity. The vehicle includes a drain door assembly and the drain door assembly has an inlet connected to the filtering system. A handle is located adjacent the electrical cord connection point, sized and shaped to easily lift the vehicle filled with water out of a pool and the drain door assembly being on an opposed portion of the vehicle from the handle.

Abstract: A pool cleaner has a float and close proximity counterweight that together improve the applied torque to steer the pool cleaner, a body 13 has slots 33 diametrically opposed on the body 13 and these receive tangs 66 and 67 which depend from a circular body 68. The body 68 carries a circular guide-way 69 with a guide 70 travelling between opposite ends of the guide-way. Afloat 26 is connected to the guide by two pivot arms 71 and 72 which have openings at their ends so that they slide into position and are retained in place by snap in retainers 73 and 74. The guide 70 has a circular shoulder 75 and at opposite ends of the guide has projections 76 and 77 such that the rail 78 of the guide-way is retained between the surface 75 and the inner surfaces 78 and 79 of the projections 76 and 77 with the rail against the surface 80. A corresponding structure is on the opposite side of the guide and this retains the rail 81 so that the guide slides around a circular path defined by the rails 78 and 81.

Abstract: An automatic device for cleaning a surface immersed in a liquid, includes a body able to move in a substantially linear manner along the immersed surface and a cylindrical sleeve connected to the body including an inlet and an outlet through which the liquid is ejected when the cleaning device is operating. The device further includes: a) a first orifice on one of the lateral faces of the sleeve; and b) elements for selectively covering the first orifice so as: i) to cover the first orifice when the body is moving in a substantially linear manner along the immersed surface; and ii) not to cover the first orifice when the body is immobilized and can no longer move in a substantially linear manner along the immersed surface.

Abstract: A swimming pool cleaner interchangeably usable as a suction cleaner and as a pressure cleaner. The cleaner is of the type movable along an underwater pool surface to clean debris therefrom, the pool cleaner including a body having a debris inlet and a debris outlet. The body is adapted at the debris outlet for securement of either a water-suction hose connected to a remote suction system or a debris-collection device entrapping debris and passing water therethrough back into the pool. A venturi-line structure is secured with respect to the body. The venturi-line structure includes a venturi-line inlet adapted for connection of a water-flow line fed by a remote pump and a venturi jet located at the debris inlet to cause accelerated flow substantially thereacross and into the body when the cleaner is used as a pressure cleaner. The body includes a debris-inlet adjuster configured to reduce the debris inlet to adapt the cleaner for use as a suction cleaner.

Abstract: A self-propelled robotic pool cleaner (100) has a first pair of driven brushes (12, 14) and second pair of free brushes co-axially mounted for rotation on axles (16) at the opposite ends of the pool cleaner that are transverse to the direction of movement. The first pair of brushes are mounted on one side and are driven by a drive motor (110); the second pair of brushes are mounted on the opposite side of the cleaner. A rotational delay clutch (30) is co-axially positioned between each pair of the first and second brushes so that reversing the drive motor causes the first pair of driven brushes to temporarily rotate at an angular rotational velocity that is greater than that of the second pair of brushes, thereby pivoting the pool cleaner through a predetermined angular change in direction before the synchronous rotation of the second pair of dual brushes is initiated by the engagement of the clutch.

Abstract: A motorised pool-cleaning device (1) includes: a suction element (30); a rotary element (4) for moving the device, which define first (2) and second (3) bearing axles; a support (18) consisting of (i) a first central part (24) and (ii) first (25) and second (26) side covers which are connected to either side of the first central part, such as to form the chassis of the motorised device, and which support the rotary movement element (4); and a drive element (16, 17) for rotating the rotary movement element (4), which are disposed on the first and second side covers in a cantilevered manner.

Abstract: A swimming pool cleaning assembly that has at least one ultrasonic generator, a swimming pool cleaning machine including a support frame, a housing shell provided with a bottom wall and arranged around the support frame, a driver located in the housing shell, advancer supported by the frame and arranged to be place, in use, on a surface to be cleaned of a swimming pool and driven, at least one water suction opening provided in the bottom surface of the housing shell, which is designed to be put in fluid communication with water suction, driver being tightly sealed in the housing shell and electrically connectable to the supply, the ultrasonic generator being arranged at the bottom wall facing, in use, the surface to be cleaned.

Abstract: A self-propelled apparatus for cleaning the submerged bottom surfaces of a pool or tank in a predetermined regular pattern includes a reversible drive means for propelling the apparatus in opposite directions corresponding to the longitudinal axis of the apparatus. A housing is formed by front and rear walls and depending side portions defining the periphery of the apparatus. A plurality of supporting wheels are coupled to the housing to enable motion of the apparatus. A projecting pivot member extends beyond the periphery of the the housing from at least one of the supporting wheels, wherein the end of the projecting pivot member serves as a pivot point when it contacts an adjacent side wall of the pool to change the orientation of the apparatus with respect to the side wall of the pool.

Abstract: A self-propelled apparatus for cleaning the submerged bottom surfaces of a pool or tank in a predetermined regular pattern includes a reversible water jet drive means for propelling the apparatus in opposite directions corresponding to the longitudinal axis of the apparatus. The direction of the discharge of the propelling water jet is changed by mechanical sensors, electrical sensors, or by interrupting the water pump. The source of the pressurized jet stream can include a pump integral to the apparatus or an external portable pump and/or a pump associated with the pool's filtering and/or circulation system.

Abstract: The invention relates to a cleaner apparatus for a submerged surface comprising a hollow body (1) and at least one liquid inlet (9) at the base (16) of said hollow body (1), characterized in that it comprises at least one accelerating protuberance (31) extending toward the submerged surface while maintaining a height of liquid, and extending, with respect to a forward travel direction of the apparatus, in front of an adjacent liquid inlet (9) while maintaining the passage cross section of said liquid inlet (9).

Abstract: A swimming pool cleaning apparatus comprises a number of joined sections of tubing or pipe in a generally T-shaped configuration. The pipe is preferably PVC pipe. The preferred embodiment comprises an elongated hollow pipe section referred to herein as the head. The head is preferably about 28 inches in length, although lengths of about 20 inches to about 40 inches have been shown to be suitable as well. The PVC pipe used in the preferred embodiment is standard half-inch PVC pipe, but other size PVC may also be suitable. The head pipe has a plurality of aligned 1/16 inch diameter holes drilled through the pipe along its length. In the preferred embodiment, these holes are drilled at different angles relative to the longitudinal axis of the head. One or two of these holes are drilled to be perpendicular to the head axis while holes to either side of the perpendicular holes are drilled to have an angular offset of about 5° from hole to adjacent hole. This offset provides a more effective cleaning pattern.

Abstract: The invention relates to a device for cleaning an immersed surface comprising a hollow body and members for driving this body over the immersed surface, a filtration chamber which has a liquid inlet (9) and a liquid outlet (10), a hydraulic circuit for the flow of liquid between the inlet (9) and the outlet (10) through a filtering device (11), a handle for operating the body which allows a user to carry it in order to immerse it in the liquid or remove it from the liquid, wherein the liquid outlet (10) is arranged at a longitudinal end of the body, and wherein the operating handle is connected to the body at an opposing end so that, when the body is suspended by the operating handle, it tilts spontaneously under the effect of gravity into an emptying position in which the liquid outlet (10) is located below the liquid inlet (9).

Abstract: The invention relates to a rolling cleaner apparatus for a submerged surface, comprising rolling drive members, at least one motor (20a, 20b) for driving at least one rolling drive member, a filtration chamber formed in the hollow body and having a liquid inlet into the hollow body, a liquid outlet from the hollow body, a hydraulic circuit for circulating liquid between the liquid inlet and the liquid outlet through a filtering device, a motorized pumping device (12) designed to generate a flow of liquid between each liquid inlet and each liquid outlet, characterized in that it comprises a control unit (90) designed to modulate the flow of liquid circulating between each liquid inlet and each liquid outlet.

Abstract: The invention relates to a rolling device for cleaning an immersed surface, comprising at least one front drive rolling member (2) and a hydraulic circuit which has at least one liquid outlet (10) which is orientated towards the rear, and which is capable of creating a flow of liquid which is discharged from each rear outlet (10) in order to create a hydraulic reaction force, and which has a longitudinal component (Fe) for driving the device forwards which is not equal to zero and whose value is adapted to create a pressure torque for each front drive rolling member (2) on the immersed surface and, alone, to move the device forwards when it is immersed and when each front drive rolling member (2) is lifted from the immersed surface.

Abstract: The invention relates to a device for cleaning an immersed surface comprising a hollow body and members for driving the body over the immersed surface, a filtration chamber which is provided in the hollow body and which has a liquid inlet and a liquid outlet, a hydraulic circuit for a flow of liquid between the inlet and the outlet through a filtering device, wherein the filtering device comprises an opening which is in communication with the liquid inlet and, for filtering and recovering debris, a space (55) which is delimited by filtering walls (56, 57, 58, 59) and which extends towards the liquid outlet, the space (55) having a regular cross-section which decreases from the opening towards the liquid outlet in order to form a convergent chamber for tangential filtration of the liquid.

Abstract: Disclosed herein is a pool cleaning an electric pool cleaning vehicle having a drive assembly and including an advanced system for draining water from the vehicle as the vehicle is removed from a pool of water. The vehicle includes a housing defining a body shell and the body shell having an interior cavity and an electrical power cord to supply power to the vehicle having a connection point on the vehicle. A filtering system is located within the body cavity. The vehicle includes a drain door assembly and the drain door assembly has an inlet connected to the filtering system. A handle is located adjacent the electrical cord connection point, sized and shaped to easily lift the vehicle filled with water out of a pool and the drain door assembly being on an opposed portion of the vehicle from the handle.

Abstract: he invention relates to a device for cleaning an immersed surface comprising a hollow body and members for driving the hollow body over the immersed surface in a main direction of advance; a filtration chamber which is provided in the hollow body and which has: a liquid inlet conduit (15) which extends inside the hollow body and which has a lower end (81) which forms a liquid inlet (9) and an opposing upper end (82) which opens into a filtering device (11); a liquid outlet out of the hollow body; a hydraulic circuit for the flow of liquid between the inlet (9) and the liquid outlet through the filtering device (11), wherein the inlet conduit (15) has a regular cross-section whose surface-area varies from the lower end (81) thereof up to a maximum value at the upper end (82) thereof which opens in the filtering device (11).

Abstract: The invention relates to a device for cleaning an immersed surface comprising a hollow body; members (2, 3, 4) for driving the body; a filtration chamber (8) which has: a liquid inlet (9) and a liquid outlet (10); a filtering device (11) which is removably mounted in the filtration chamber (8); a hydraulic circuit for the flow of liquid between the inlet (9) and the outlet (10) through the filtering device (11); an axial pumping propeller (14) which is interposed in the hydraulic circuit; a flap (6) for access to the filtering device (11), wherein the pumping propeller (14) is orientated in order to generate a liquid flow with a horizontal component towards the rear, the outlet (10) being opposite the propeller; the pumping motor (12) is arranged below the hydraulic circuit; the access flap (6) is arranged at the top and/or towards the front of the hydraulic circuit in order to allow the filtering device (11) to be disassembled via the top and/or towards the front.

Abstract: The invention relates to a device for cleaning an immersed surface comprising a hollow body and members for driving the hollow body over the immersed surface; a filtration chamber which is provided in the hollow body and which has: a liquid inlet (9); a liquid outlet; a hydraulic circuit for flow of liquid between the inlet (9) and the outlet through a filtering device, wherein the filtering device comprises a first filtering shell (55) which extends towards the rear of the hollow body, from a front opening (64); a second shell (49) which is fitted to the first shell at the front thereof, these shells being able to be fitted together so as to form an integral filtering casing (49, 55); in which case the second shell (49) closes the front opening (64) of the first shell, with the exception of a liquid inlet passage; the two shells being able to be separated from each other by disengaging the front opening (64) of the first shell (55) which acts as an opening for emptying this shell.

Abstract: The invention relates to a device for cleaning an immersed surface comprising a hollow body and members for driving the body over the immersed surface; a filtration chamber which is provided in the hollow body and which has: a liquid inlet; a liquid outlet; a hydraulic circuit for the flow of liquid between the inlet and the outlet through a filtering device (11), wherein the filtering device (11) comprises a filtering casing (49, 55) which is removably mounted in the filtration chamber and which can be inserted into/removed from the filtration chamber in one piece, and the filtering casing (49, 55) has at least a lower end which opens at the base of the hollow body and which constitutes a liquid inlet into the hollow body of the device.

Abstract: The invention relates to a device for cleaning an immersed surface, comprising a hollow body and members for driving the body over the immersed surface, a filtration chamber which has a liquid inlet (9) in the hollow body located at the base of the hollow body, at least one liquid outlet (10) out of the hollow body, a hydraulic circuit for flow of liquid between the inlet (9) and the outlet (10) through a filtering device (11), wherein it comprises: at least one rear outlet, and a rigid wall (16) which is arranged in the filtering device (11) and which extends in a direction which is non-parallel with at least one direction which connects an inlet (9) and an outlet (10) in order to form an obstacle to the flow of liquid from this inlet (9) to this outlet (10) which brings about a swirling flow of liquid in the filtering device downstream of this rigid wall (16).

Abstract: The invention relates to a device for cleaning an immersed surface comprising a hollow body (1), members (2, 3, 4) for driving this body (1) over the immersed surface in a longitudinal direction, comprising a wheel (2), a device (4) for brushing the immersed surface, a mechanism for rotating the brushing device (4) about a brushing axis, wherein the driving mechanism of the brushing device (4) comprises: an internally toothed ring (5) which is fixedly joined to a wheel (2), a brush pinion (42) which is fixedly joined to the brushing device (4) and which is engaged in the ring (5) of this drive wheel (2) in such a manner that a rotation of this drive wheel (2) brings about a rotation of the brushing device (4) about the brushing axis thereof in the same rotation direction.

Abstract: The invention relates to a device for cleaning an immersed surface comprising a hollow body and members (2, 3, 4) for driving the body over the immersed surface, a filtration chamber which is provided in the body and which has: a liquid inlet (9) located at the base of the body; a liquid outlet (10) arranged opposite the base of the body; a hydraulic circuit for flow of liquid between this liquid inlet (9) and this liquid outlet (10) through a filtering device (11); a liquid pumping device (12, 13, 14) comprising a pumping motor (12) which has a rotating drive shaft (13) which is coupled to a pumping propeller (14) which is interposed in the hydraulic circuit, wherein the liquid outlet (10) is longitudinally offset from the liquid inlet (9) and the pumping propeller (14) has an inclined rotation axis (51) which forms, with the longitudinal direction, an angle which is not equal to zero and which is different from 90°.

Abstract: Devices for cleaning vessels, especially swimming pools, are discussed. The devices may include repositionable in-line valves, with the valves typically moving laterally (from side to side) and changing the initial direction of the main fluid-flow path through the valves and corresponding cleaner bodies. Asymmetric feet may be utilized as part of the devices, whose bottom bearing surfaces may include elongated strips of material placed parallel to the normally-forward direction of travel of the devices. Discs of non-uniform flexibility also may be employed, and blocking tabs or gripping material may be used to inhibit undesired backward movement of a cleaner when its operation commences.

Abstract: A self-propelled robotic pool cleaner (100) has a first pair of driven brushes (12, 14) and second pair of free brushes co-axially mounted for rotation on axles (16) at the opposite ends of the pool cleaner that are transverse to the direction of movement. The first pair of brushes are mounted on one side and are driven by a drive motor (110); the second pair of brushes are mounted on the opposite side of the cleaner. A rotational delay clutch (30) is co-axially positioned between each pair of the first and second brushes so that reversing the drive motor causes the first pair of driven brushes to temporarily rotate at an angular rotational velocity that is greater than that of the second pair of brushes, thereby pivoting the pool cleaner through a predetermined angular change in direction before the synchronous rotation of the second pair of dual brushes is initiated by the engagement of the clutch.

Abstract: A pool cleaning robot is provided for cleaning a surface of a swimming pool. The robot comprises a main housing, a pair of main wheels disposed at opposite ends of a bottom panel of the housing spanning along a majority of its width and carrying a pair of continuous tracks spanning between edges thereof, the main wheels being configured for rotating at a first angular velocity, at least one inlet being formed in the bottom panel between the main wheels and being configured for intake of water and debris, and at least one auxiliary brushwheel disposed between the main wheels. The robot is configured for rotating the auxiliary brushwheel about an axis of rotation at a second angular velocity which is substantially greater than the first angular velocity.

Abstract: An automatic pool cleaning attachment brush for the purpose of non-manual bristle brushing of any swimming pool surface. The inventive device includes a polyvinyl chloride (PVC) mounting plate with pre-drilled holes, bristle brushes, and stainless steel mounting screws. The self-tapping stainless steel screws are used for mounting my invention to the back of an existing automatic swimming pool cleaner. The PVC plate contains pre-drilled holes for easy installation. Bristle brushes are the main components which provide the unique action which is the principle and concept of my invention.