An unmanned ground vehicle (UGV) includes a mast attached to a UGV body at a base end. The mast extends a predetermined distance to a mast head which can include a mast-head device. A flipper assembly includes at least one flipper arm which is rotatably mounted to the UGV body to help facilitate UGV stability and/or mobility. A flipper actuator causes the flipper arm to rotate about a flipper rotation axis. Movement of the mast between a stowed configuration and a deployed configuration is selectively controlled by operation of the flipper assembly.

A kit that may include an interfacing device that includes pool sidewall interface, and a pool cleaning robot that includes a housing and a drive system. The drive system may include a drive motor system, a group of interfacing modules and a transmission system that is arranged to mechanically couple the drive motor system to the group of interfacing modules. At least one interfacing module of the group may include protuberances that are shaped to fit a non-smooth surface of the pool sidewall interface.

The invention relates to a travel system for cylindrical and/or conical surfaces, in particular for the outer surface or the inner surface of a pipe or mast (1), having: an assembly platform (4a, 4b); a plurality of connected undercarriage elements (6), preferably identical undercarriage elements (6), which form a closed ring in a circumferential direction, in particular together with the assembly platform (4a, 4b) integrated between two undercarriage elements (6); a clamping system (7) which connects at least the undercarriage elements (6) to each other and with which the distance between the connected undercarriage elements (6) can be changed; at least one other undercarriage element (8) which is situated on the assembly platform (4a, 4b) at an axial distance from the ring of connected undercarriage elements (6); wherein at least the undercarriage elements (6) connected to the ring, preferably also the undercarriage element (8) axially spaced therefrom, are each in the form of a continuous track system. The invention also relates to a continuous track vehicle (11), in particular a 2-track continuous track vehicle (11), having at least one chain guided around two spaced deflection wheels (17), in particular deflection gears (17), running surface elements (20) being secured to the links (18) of the chain, wherein the running surface elements (20) each comprise rollers (21) for contacting a driving surface, the axes of rotation of the rollers being oriented in the direction in which the deflection wheels (17) are spaced or the running surface elements (20) being displaceable relative to the associated link (18) by at least one actuator (24).

The invention relates to a travel system for cylindrical and/or conical surfaces, in particular for the outer surface or the inner surface of a pipe or mast (1), having: an assembly platform (4a, 4b); a plurality of connected undercarriage elements (6), preferably identical undercarriage elements (6), which form a closed ring in a circumferential direction, in particular together with the assembly platform (4a, 4b) integrated between two undercarriage elements (6); a clamping system (7) which connects at least the undercarriage elements (6) to each other and with which the distance between the connected undercarriage elements (6) can be changed; at least one other undercarriage element (8) which is situated on the assembly platform (4a, 4b) at an axial distance from the ring of connected undercarriage elements (6); wherein at least the undercarriage elements (6) connected to the ring, preferably also the undercarriage element (8) axially spaced therefrom, are each in the form of a continuous track system. The invention also relates to a continuous track vehicle (11), in particular a 2-track continuous track vehicle (11), having at least one chain guided around two spaced deflection wheels (17), in particular deflection gears (17), running surface elements (20) being secured to the links (18) of the chain, wherein the running surface elements (20) each comprise rollers (21) for contacting a driving surface, the axes of rotation of the rollers being oriented in the direction in which the deflection wheels (17) are spaced or the running surface elements (20) being displaceable relative to the associated link (18) by at least one actuator (24).

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 tracked mobility device includes a pair of track drives having a rear weight-bearing wheel assembly, a center weight-bearing wheel assembly, a forward weight-bearing wheel assembly, and a front roller assembly. The rear weight-bearing wheels, the center weight-bearing wheels, and the forward weight-bearing wheels are fixed to the frame at a height effective to cause the main weight-bearing surface to always have a V-shaped lower surface when viewed from the side. The center weight-bearing wheels, the forward weight-bearing wheels, and the front rollers are fixed to the frame at a height effective to cause that portion of each track drive always to have a V-shaped lower surface when viewed from the side. At least one powered drive wheel is provided, and at least one of the rollers is a tensioning roller.

A tracked mobility device includes a pair of track drives having a rear weight-bearing wheel assembly, a center weight-bearing wheel assembly, a forward weight-bearing wheel assembly, and a front roller assembly. The rear weight-bearing wheels, the center weight-bearing wheels, and the forward weight-bearing wheels are fixed to the frame at a height effective to cause the main weight-bearing surface to always have a V-shaped lower surface when viewed from the side. The center weight-bearing wheels, the forward weight-bearing wheels, and the front rollers are fixed to the frame at a height effective to cause that portion of each track drive always to have a V-shaped lower surface when viewed from the side. At least one powered drive wheel is provided, and at least one of the rollers is a tensioning roller.

A pool cleaning robot that may include a filtering unit for filtering fluid that passes through the filtering unit; a calorimetric sensor for sensing a cleanliness related parameter of the filtering unit while the pool cleaning robot is submerged in the fluid; and a controller that is configured to at least assist in determining, based on the cleanliness related parameter of the filtering unit, a cleanliness of the filtering unit.

This specification describes unmanned ground vehicle track systems. In some examples, an unmanned ground vehicle includes a frame having right and left sides and right and left track assemblies, each track assembly being coupled to a corresponding side of the frame in parallel with the other track assembly. Each track assembly includes a drive pulley coupled to the corresponding side of the frame and a track including a continuous flexible belt supported by the drive pulley. The track includes an interior surface engaged with the drive pulley and an exterior surface opposite the interior surface, and the exterior surface of the track includes a plurality of flexible bristles. The unmanned ground vehicle includes one or more drive motors configured to drive the drive pulleys of the right and left track assemblies.

This specification describes unmanned ground vehicle track systems. In some examples, an unmanned ground vehicle includes a frame having right and left sides and right and left track assemblies, each track assembly being coupled to a corresponding side of the frame in parallel with the other track assembly. Each track assembly includes a drive pulley coupled to the corresponding side of the frame and a track including a continuous flexible belt supported by the drive pulley. The track includes an interior surface engaged with the drive pulley and an exterior surface opposite the interior surface, and the exterior surface of the track includes a plurality of flexible bristles. The unmanned ground vehicle includes one or more drive motors configured to drive the drive pulleys of the right and left track assemblies.