An apparatus for cleaning or maintaining the outer side of a hull of a marine vessel or the inner side of a cargo hold of a marine vessel. The apparatus includes a housing provided with a first row of magnetic driving and attachment elements and a second row of magnetic driving and attachment elements. The first and second row being parallel and arranged at opposing lateral sides of the housing. The first row of magnetic driving and attachment elements comprising magnetic wheels and/or a continuous track with magnetic links. The second row of magnetic driving and attachment elements comprising magnetic wheels and/or a continuous track with magnetic links. Further, the apparatus is provided with least one suspended magnetic wheel arranged between the first row and the second row, the at least one suspended magnetic wheel being resiliently suspended from the housing and biased towards the housing.

An apparatus for cleaning or maintaining the outer side of a hull of a marine vessel or the inner side of a cargo hold of a marine vessel. The apparatus includes a housing provided with a first row of magnetic driving and attachment elements and a second row of magnetic driving and attachment elements. The first and second row being parallel and arranged at opposing lateral sides of the housing. The first row of magnetic driving and attachment elements comprising magnetic wheels and/or a continuous track with magnetic links. The second row of magnetic driving and attachment elements comprising magnetic wheels and/or a continuous track with magnetic links. Further, the apparatus is provided with least one suspended magnetic wheel arranged between the first row and the second row, the at least one suspended magnetic wheel being resiliently suspended from the housing and biased towards the housing.

A system for extraction of a pool cleaning robot from a pool, the system may include a base for receiving the pool cleaning robot; and at least one out of (a) an interface device and (b) a pool cleaner electrical power cable winding drum; wherein the interfacing device comprises an interfacing device portion that extends beyond and below the base during a part of the extraction of the pool cleaning robot from the pool; and wherein the pool cleaner electrical power cable winding drum is configured to wind and unwind a power cable of the pool cleaning robot during the part of the extraction of the pool cleaning robot from the pool.

A wall climbing toy includes a frame body, a drive shaft, a plurality of spring-loaded release valves, a cam shaft, a drive unit, a left gear train, a shaft extension, a plurality of primary crank arms, a plurality of connecting rods, a plurality of suction cups, and a plurality of air tube units. When each of the spring-loaded release valves is displaced from a seal position to an open position, an air seal formed between a corresponding one of the suction cups and a flat surface is broken. When the drive shaft is driven concurrently with the cam shaft to rotate, the air seals formed between the suction cups and the flat surface are broken alternately so as to permit the connecting rods to be alternately pulled away from a flat surface.

A wall climbing toy includes a frame body, a drive shaft, a plurality of spring-loaded release valves, a cam shaft, a drive unit, a left gear train, a shaft extension, a plurality of primary crank arms, a plurality of connecting rods, a plurality of suction cups, and a plurality of air tube units. When each of the spring-loaded release valves is displaced from a seal position to an open position, an air seal formed between a corresponding one of the suction cups and a flat surface is broken. When the drive shaft is driven concurrently with the cam shaft to rotate, the air seals formed between the suction cups and the flat surface are broken alternately so as to permit the connecting rods to be alternately pulled away from a flat surface.

A wall climbing toy includes a frame body, a drive shaft, a plurality of spring-loaded release valves, a cam shaft, a drive unit, a left gear train, a shaft extension, a plurality of primary crank arms, a plurality of connecting rods, a plurality of suction cups, and a plurality of air tube units. When each of the spring-loaded release valves is displaced from a seal position to an open position, an air seal formed between a corresponding one of the suction cups and a flat surface is broken. When the drive shaft is driven concurrently with the cam shaft to rotate, the air seals formed between the suction cups and the flat surface are broken alternately so as to permit the connecting rods to be alternately pulled away from a flat surface.

A drive unit for driving a robot along an inclined surface is disclosed. An endless tread engages a pair of wheels to define a planar bottom surface of the endless tread. A vacuum motor pulls air through holes in the endless tread when the holes are aligned with a vacuum opening.

A drive unit for driving a robot along an inclined surface is disclosed. An endless tread engages a pair of wheels to define a planar bottom surface of the endless tread. A vacuum motor pulls air through holes in the endless tread when the holes are aligned with a vacuum opening.

A method and apparatus for moving a robotic vehicle relative to a structure. A set of tracks associated with a base of the robotic vehicle may be deployed. A number of attachment units associated with the set of tracks may be aligned with a corresponding portion of a number of structural members of the structure in a forward sequence as the set of tracks is deployed. The number of attachment units may be secured to the corresponding portion of the number of structural members in the forward sequence.

A magnetic robot includes a chassis and at least one track assembly associated with the chassis. The track assembly has a linear series of non-circulating magnet modules displaceably mounted with respect to the chassis. A driven track circulates about the magnet modules and travels on guide portions of the magnet modules.