Cleaning system, method for cleaning and use of a cleaning system

Abstract

According to an example aspect of the present invention, there is provided a cleaning system comprising a first guiding configured to be coupled to an object, a second guiding configured to be coupled to the object such that the second guiding is arranged at a distance from the first guiding, a first part movably coupled to the first guiding, a second part movably coupled to the second guiding, wherein the first part is movable relative to the second part, and wherein the system further comprises a drive system configured to simultaneously move the first part and the second part along the first guiding and the second guiding.

Claims

1. A cleaning system comprising: a first guiding configured to be coupled to an object, a second guiding configured to be coupled to the object such that the second guiding is arranged at a distance from the first guiding, a third guiding configured to be coupled to the obiect such that the third guiding is arranged at a distance from the first guiding and the second guiding, a first part movably coupled to the first guiding, a second part movably coupled to the second guiding, a third part coupled to the second part, wherein the second part and the third part are coupled to each other via a joint, and a fourth part movably coupled to the third guiding, wherein the first part is movable relative to the second part and the third part is movable relative to the fourth part, and wherein cleaning elements are coupled to each of the first part, the second part, the third part and the fourth part, and wherein the system further comprises at least a first drive system configured to simultaneously move the first part, the second part the third part and the fourth part along the first guiding, the second guiding and the third guiding.

2. (canceled)

3. The cleaning system according to claim 1, wherein the cleaning system further comprises at least one fresh water connector for supplying at least one of the first part and the second part with fresh water for cleaning a surface of the object.

4. The cleaning system according to claim 3, wherein at least one of the first part and the second part comprises a plurality of fresh water outlets.

5. The cleaning system according to claim 4, wherein the cleaning system is configured to guide fresh water from the at least one fresh water connector to the plurality of fresh water outlets.

6. The cleaning system according to claim 1, wherein the second part is coupled to the second guiding via a first joint in the form of a first ball joint.

7. (canceled)

8. The cleaning system according to claim 1, wherein the second part is coupled to the third part via a hinge joint.

9. The cleaning system according to claim 1, wherein the fourth part is coupled to the third guiding via a second ball joint.

10. The cleaning system according to claim 1, wherein the cleaning system is configured to move along a curved or planar surface.

11. The cleaning system according to claim 1, wherein the cleaning elements comprise bristles, rubber lips, deck cloth or garment.

12. The cleaning system according to claim 1, wherein the cleaning system is configured to receive fresh water with a water pressure of less than 10 bar.

13. The cleaning system according to claim 1, wherein the parts of the cleaning system are configured to simultaneously move over a window surface.

14. A method for cleaning a surface of an object, the method comprising: coupling a first guiding to an object, coupling a second guiding to the object such that the second guiding is arranged at a distance from the first guiding, coupling a third guiding to the object such that the third guiding is arranged at a distance from the first guiding and the second guiding, coupling a first part movably to the first guiding, coupling a second part movably to the second guiding, coupling a third part to the second part, wherein the second part and the third part are coupled to each other via a first joint, coupling a fourth part movably to the third guiding, and simultaneously moving the first part, the second part, the third part and the fourth part along the first guiding, the second guiding and the third guiding by at least a first drive system, wherein the first part is movable relative to the second part and the third part is movable relative to the fourth part.

15. A use of a cleaning system in accordance with claim 1 in connection with cleaning of a surface of a ship or a building.

16. The cleaning system according to claim 1, wherein the first drive system is coupled to the first guiding and the cleaning system further comprises a second drive system coupled to the third guiding.

17. The cleaning system according to claim 16, wherein at least one of the first drive system and the second drive system comprises a first wheel, a second wheel and a third wheel, and wherein the second wheel and the third wheel are in mechanical contact with the first wheel.

18. The cleaning system according to claim 16, wherein at least one of the first drive system and the second drive system comprises an electric motor.

19. The cleaning system according to claim 16, wherein at least one of the first drive system and the second drive system comprises a gear.

20. The cleaning system according to claim 16, wherein at least one of the first drive system and the second drive system is configured to be inclined relative to the first part or the fourth part.

21. The cleaning system according to claim 16, wherein the cleaning system comprises at least one energy chain.

22. The cleaning system according to claim 1, wherein the cleaning system comprises an angle sensor configured to provide information about an orientation of at least one of the first part, the second part, the third part and the fourth part relative to a reference object, plane or a vector.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0079] FIG. 1 illustrates a schematic view of a cleaning system in accordance with at least some embodiments of the present invention,

[0080] FIG. 2 illustrates a schematic perspective view of a cleaning system in accordance with at least some embodiments of the present invention,

[0081] FIG. 3 illustrates a schematic perspective view of another cleaning system in accordance with at least some embodiments of the present invention,

[0082] FIG. 4 illustrates a schematic perspective view of a first detail of a cleaning system in accordance with at least some embodiments of the present invention,

[0083] FIG. 5 illustrates a schematic perspective view of a second detail of a cleaning system in accordance with at least some embodiments of the present invention,

[0084] FIG. 6 illustrates a schematic perspective view of a third detail of a cleaning system in accordance with at least some embodiments of the present invention,

[0085] FIG. 7 illustrates a schematic perspective view of a further cleaning system in accordance with at least some embodiments of the present invention,

[0086] FIG. 8 illustrates a schematic perspective view of an even further cleaning system in accordance with at least some embodiments of the present invention,

[0087] FIG. 9 illustrates specific details of a first drive system of a cleaning system in accordance with at least some embodiments of the present invention,

[0088] FIG. 10 illustrates specific details of a second drive system of a cleaning system in accordance with at least some embodiments of the present invention,

[0089] FIG. 11 illustrates a schematic perspective view of a yet further cleaning system in accordance with at least some embodiments of the present invention,

[0090] FIG. 12 illustrates specific details of a drive system of a cleaning system in accordance with at least some embodiments of the present invention, and

[0091] FIG. 13 illustrates specific details of a further drive system of a cleaning system in accordance with at least some embodiments of the present invention.

EMBODIMENTS

[0092] In FIG. 1 a schematic view of a cleaning system 1 in accordance with at least some embodiments of the present invention is illustrated. An object 3 such as a passenger ship may have rows of windows which are arranged one above the other and extend along the side walls of the ship.

[0093] The cleaning system 1 comprises a first guiding 2 configured to be coupled to the object 3. Additionally, the cleaning system comprises a second guiding 4 configured to be coupled to the object 3 such that the second guiding 4 is arranged at a distance from the first guiding 2. According to this embodiment, the first guiding 2 and the second guiding 4 are ideally arranged parallel to each other. However, the first guiding 2 and second guiding 4 are typically not exactly parallel arranged to each other due to the substantial length of the ship and/or curved outer surfaces of the ship. In fact, the first guiding 2 and the second guiding 4 are typically arranged only substantially parallel to each other. Arrangement of the first guiding 2 and the second guiding 4 only substantially parallel to each other further reduces installation time.

[0094] The cleaning system 1 further comprises a first part 5 movably coupled to the first guiding 2 and a second part 6 movably coupled to the second guiding 4. The first part 5 is movable relative to the second part 6 as indicated by arrow 18. The first part 5 may be movable relative to the second part 6 in a telescope-like manner, for instance. In other words, the first part 5 is movable relative to the second part 6 in a direction perpendicular or substantially perpendicular to a direction of movement of the cleaning system 1 as indicated by arrow 17. Both the first part 5 and the second part 6 may each comprise a hollow profile. The cross-section of the hollow profiles may be, for example, rectangular. The second part 6 may be partially inserted into the hollow first part 5, for instance.

[0095] The cleaning system 1 further comprises a drive system (not shown) configured to simultaneously move the first part 5 and the second part 6 along the first guiding 2 and the second guiding 4 as indicated by arrow 17. Drive systems for driving a structure along a guiding are commercially available. However, specific details of a drive system, which may be utilized in connection with certain embodiments of the present invention, are described in connection with FIGS. 9 to 13.

[0096] Furthermore, the cleaning system 1 comprises cleaning elements 7 coupled to each of the first part 5 and the second part 6. Examples of cleaning elements 7 are bristles, rubber lips, deck cloth, garment or any other elements suitable for cleaning of a surface 9. The cleaning elements 7 are arranged to be brought into mechanical contact with the surface 9 to be cleaned, for example with window surfaces of a ship.

[0097] Additionally, the cleaning system comprises at least one fresh water connector 8 for supplying at least one of the first part 5 and the second part 6 with fresh water for cleaning the surface 9 of the object 3. The fresh water connector 8 may be connected to a fresh water supply system (not shown) of the ship, for example by a hose. At least one of the first part 5 and the second part 6 may comprise a plurality of fresh water outlets 20. The cleaning system 1 is configured to guide fresh water from the at least one fresh water connector 8 to the plurality of fresh water outlets 20. According to certain embodiments, fresh water with a pressure of less than 10 bar is provided to the fresh water connector 8. In other words, the fresh water supply system of the ship may be used for cleaning of the surface 9. It is not required to provide water for cleaning the surface 9 with high pressure. According to certain other embodiments, fresh water with a water pressure of more than 10 bar or more than 15 bar is received by the fresh water connector. The water pressure may be in the range between 100-200 bar, for instance. The water can then be sprayed under high pressure to the surface to be cleaned. The water outlets 20 may be designed as spray nozzles in such a case. According to certain embodiments, the fresh water is pre-treated or filtered prior to use in the system 1. In particular, minerals may be removed from the fresh water so that no stripes remain on the glass surface after cleaning.

[0098] In FIG. 2 a schematic perspective view of a cleaning system 1 in accordance with at least some embodiments of the present invention is illustrated. The shown cleaning system 1 is coupled to an object 3. The object 3 may be, for example, a dome located on a cruise ship or another three-dimensional window structure of a ship. The structure is formed by a plurality of window elements 21.

[0099] The shown cleaning system 1 comprises a first guiding 2 configured to be coupled to the object 3. Further, the cleaning system 1 comprises a second guiding 4 configured to be coupled to the object 3 such that the second guiding 4 is arranged at a distance from the first guiding 2. Additionally, the cleaning system 1 comprises a third guiding 10 configured to be coupled to the object 3 such that the third guiding 10 is arranged at a distance from the second guiding 4. The distance between the first guiding 2 and the second guiding 4 may be, for example, in the range between 0.5 m-5 m. The distance between the second guiding 4 and the third guiding may be, for example, in the range between 0.5 m-5 m. The distance between the first guiding 2 and the second guiding 4 and/or the distance between the second guiding 4 and the third guiding 10 may be constant or varying along the curved structure.

[0100] The cleaning system 1 further comprises a first part 5 movably coupled to the first guiding 2 and a second part 6 movably coupled to the second guiding 4. The first part 5 is movable relative to the second part 6 as indicated by arrow 18. The second part 6 may be coupled to the second guiding 4 via a first joint in the form of a first ball joint 13 as illustrated in FIG. 5. Additionally, a third part 11 is coupled to the second part 6. The second part 6 and the third part 11 are coupled to each other via a second joint 14. The second joint 14 is typically a hinge joint. Of course, the third part 11 may be coupled to the second guiding 4 and the second part 6 may be coupled to the third part 11 via the second joint 14 as an alternative. Further, a fourth part 12 is movably coupled to the third guiding 10. The fourth part 12 is coupled to the third guiding 10 via a third joint in the form of a second ball joint 15 as illustrated in FIG. 6. The first part 5, the second part 6, the third part 11 and the fourth part 12 may each comprise a hollow profile. The cross-section of the hollow profiles may be, for example, rectangular. The second part 6 may be partially inserted into the hollow first part 5 and the fourth part 12 may be partially inserted into the third part 11, for instance.

[0101] The first part 5 may be movable relative to the second part 6 as indicated by arrow 18. The first part 5 may be movable relative to the second part 6 in a telescope-like manner, for instance. In other words, the first part 5 is movable relative to the second part 6 in a direction perpendicular or substantially perpendicular to a direction of movement of the cleaning system 1 as indicated by arrow 18. Furthermore, the third part 11 may be movable relative to the fourth part 12 as indicated by arrow 19. The third part 11 may be movable relative to the fourth part 12 in a telescope-like manner, for instance. In other words, the third part 11 may be movable relative to the fourth part 12 in a direction perpendicular or substantially perpendicular to a direction of movement of the cleaning system 1 as indicated by arrow 17.

[0102] The cleaning system 1 further comprises a drive system (not shown) configured to simultaneously move the first part 5, the second part 6, the third part 11 and the fourth part 12 along the first guiding 2, the second guiding 4 and the third guiding 10 as indicated by arrow 17. Drive systems for driving a structure along a guiding are commercially available, and are thus not further explained within this document.

[0103] Furthermore, the cleaning system 1 comprises cleaning elements 7 coupled to each of the first part 5, the second part 6, the third part 11 and the fourth part 12. Examples of cleaning elements 7 are bristles, rubber lips, deck cloth, garment or any other elements suitable for cleaning of a surface 9 such as a window surface of a structure of a ship. The cleaning elements 7 are arranged to be brought into mechanical contact with the surface 9 to be cleaned.

[0104] Additionally, the cleaning system 1 comprises at least one fresh water connector 8 for supplying at least one of the first part 5, the second part 6, the third part 11 and the fourth part 12 with fresh water for cleaning the surface 9 of the object 3 as illustrated in FIG. 4. The fresh water connector 8 may be connected to a fresh water supply system (not shown) of the ship, for example by a hose. At least one of the first part 5, the second part 6, the third part 11 and the fourth part 12 may comprise a plurality of fresh water outlets 20. The cleaning system 1 is configured to guide fresh water from the at least one fresh water connector 8 to the plurality of fresh water outlets 20. According to certain embodiments, fresh water with a pressure of less than 10 bar is provided to the fresh water connector 8. In other words, the fresh water supply system of the ship may be used for cleaning of the surface 9. It is not required to provide water for cleaning the surface 9 with high pressure. According to certain other embodiments, fresh water with a water pressure of more than 10 bar or more than 15 bar is received by the fresh water connector. The water pressure may be in the range between 100-200 bar, for instance. The water can then be sprayed under high pressure to the surface to be cleaned. The water outlets 20 may be designed as spray nozzles in such a case.

[0105] The shown cleaning system 1 is configured to move along a curved surface 9 formed by a plurality of window elements 21. Cleaning of the window elements 21 can take place by utilizing water and the cleaning elements. No further additives need to be used. An environment friendly cleaning system 1 for cleaning of complex three-dimensional structures is provided in accordance with the shown embodiment. Of course, a cleaning agent may be also used under certain circumstances.

[0106] In FIG. 3 a schematic perspective view of another cleaning system 1 in accordance with at least some embodiments of the present invention is illustrated.

[0107] In FIG. 4 a schematic perspective view of a first detail of a cleaning system 1 in accordance with at least some embodiments of the present invention is illustrated. The cleaning system 1 comprises at least one fresh water connector 8 for supplying at least one of the first part 5, the second part 6, the third part 11 and the fourth part 12 with fresh water for cleaning the surface 9 of the object 3. The fresh water connector 8 is easily accessible by an operator. A hose (not shown) can be connected to the fresh water connector 8. The hose may then be connected to the fresh water supply system of the ship at the other end.

[0108] In FIG. 5 a schematic perspective view of a second detail of a cleaning system 1 in accordance with at least some embodiments of the present invention is illustrated. The second part 6 may be coupled to the second guiding 4 via a first joint in the form of a first ball joint 13. Thus, the second part 6 is allowed to move relative to the ball joint 13 when the cleaning system 1 moves along the first guiding 2, the second guiding 4 and the third guiding 10. In other words, a self-aligning structure is provided.

[0109] Additionally, a third part 11 is coupled to the second part 6 via a second joint 14 in the form of a hinge joint. The hinge joint 14 allows orientation of the third part 11 and the fourth part 12 at an angle relative to the first part 5 and the second part 6. The angle may be, for example, in the range between 5-25 degrees. Window elements 21 which are arranged at an angle relative to each other can thus be cleaned by the cleaning system 1.

[0110] In FIG. 6 a schematic perspective view of a third detail of a cleaning system in accordance with at least some embodiments of the present invention is illustrated. The fourth part 12 is coupled to the third guiding 10 via a third joint in the form of a second ball joint 15. Thus, the fourth part 12 is allowed to move relative to the ball joint 15 when the cleaning system 1 moves along the first guiding 2, the second guiding 4 and the third guiding 10. In other words, a self-aligning structure is provided.

[0111] In FIG. 7 a schematic perspective view of a further cleaning system 1 in accordance with at least some embodiments of the present invention is illustrated. The cleaning system 1 is installed to a large structure formed by a plurality of window elements 21. The window elements 21 may have different dimensions, shape, surface area, installation angle, etc. in order to form the complex structure. The first guiding 2, the second guiding 4 and the third guiding 10 are typically coupled to a frame for holding the window elements 21 of the structure. The first guiding 2, the second guiding 4 and the third guiding 10 are typically each in the form of a guide rail. The distances between the guide rails may change when moving the cleaning system 1 along the curved structure. Movability of the first part 5 relative to the second part 6 and the third part 11 relative to the fourth part 12 compensates varying distances between the guide rails when moving the cleaning system 1 along the curved structure. The cleaning area 16 is defined by the distance between the first guiding 2 and the second guiding 4, the distance between the second guiding 4 and the third guiding 10 as well as the length of the first guiding 2, the second guiding 4 and the third guiding 10.

[0112] In FIG. 8 a schematic perspective view of an even further cleaning system 1 in accordance with at least some embodiments of the present invention is illustrated. According to an embodiment, the cleaning system 1 may be remotely operated by an operator utilizing a remote control with an user interface. The user interface may comprise, for example, a joystick, one button or several buttons, or a touchscreen. Water flow may be activated and stopped, direction of movement of the cleaning system 1 may be selected and/or the speed of movement of the cleaning system may be varied via the user interface. The remote control may be wirelessly connected to the cleaning system 1.

[0113] According to another embodiment, the cleaning system 1 is carrying out a preset program. For example, the cleaning system 1 may move along the window structure once per day or several times per day. Water flow is automatically activated, the cleaning system 1 then automatically moves along the window structure and subsequently the water flow is automatically stopped. The cleaning system 1 may move back into the start position or a standby position after cleaning.

[0114] According to an even further embodiment, the cleaning system 1 is controlled by a control unit. The control unit may be, for example, a computing device. According to this embodiment, the cleaning system 1 comprises a processor, which may comprise, for example, a single- or multi-core processor. The processor may be configured, at least in part by computer instructions, to perform actions. The cleaning system 1 further comprises at least one memory. The memory may be at least in part accessible to the processor. The memory may be at least in part comprised in the processor. The memory may be means for storing information. The memory may comprise computer instructions that the processor is configured to execute. When computer instructions configured to cause the processor to perform certain actions stored in the memory, and cleaning system 1 overall is configured to run under the direction of the processor using computer instructions from the memory, the processor and/or its at least one processing core may be considered to be configured to perform said certain actions. The processor and the memory may be at least in part external to the cleaning system 1 but accessible to the cleaning system 1. For example, the control unit may be located in a control station or on a bridge of a ship. Cleaning may be controlled via the control unit. There is provided a non-transitory computer readable memory having stored thereon a set of computer implementable instructions capable of causing the computing device, in connection with the cleaning system, at least to cause activation of a water flow, cause the cleaning system to move from a first position into a second position and to cause stopping a water flow.

[0115] In FIG. 9 specific details of a first drive system 25 of a cleaning system 1 in accordance with at least some embodiments of the present invention are illustrated. As shown, a first part 5 of a cleaning system 1 is coupled to a first guiding 2. The cleaning system 1 comprises at least a first drive system 25 configured to move parts of the cleaning system 1 along the first guiding 2, the second guiding 4 and the third guiding 10, for example. For example, the parts 5, 6, 11, 12 of the cleaning system 1 are configured to simultaneously move over a surface 9 of an object 3. The first drive system 25 is typically coupled to the first guiding 2. The first drive system 25 may, for example, comprise an electric motor and optionally a gear. Additionally, the first drive system 25 may comprise a first wheel 22, a second wheel 23 and a third wheel 24. The first wheel 22 or so-called driving wheel may be connected to the electric motor or gear. Clockwise rotation of the first wheel 22 caused by driving the electric motor results in anti-clockwise rotation of the second wheel 23 and the third wheel 24, which are both in mechanical contact with the first wheel 22. Accordingly, anti-clockwise rotation of the first wheel 22 caused by respective driving the electric motor results in clockwise rotation of the second wheel 23 and the third wheel 24, which are both in mechanical contact with the first wheel 22. The second wheel 23 and the third wheel 24 are in mechanical contact with a groove comprised by the first guiding 2. Consequently, parts 5, 6, 11, 12 of the cleaning system 1 can be moved in two directions along the first guiding 2, the second guiding 4 and the third guiding 10.

[0116] According to certain embodiments of the present invention, the cleaning system 1 comprises a second drive system as described in connection with FIG. 10. In such a case, the cleaning system 1 may comprise an angle sensor 26. The angle sensor 26 is configured to provide information regarding the orientation of at least one of the first part 5, the second part 6, the third part 11 and the fourth part 12 relative to a reference object, a plane, or a vector such as a gravity vector. The reference object may be the first guiding 2 and the angle sensor 26 may be coupled to the first part 5, for instance. The information about the orientation of the first part 5 relative to the first guiding 2 is useful to provide input data to the second drive system coupled to the third guiding 10. Based on the input data the second drive system can be operated such that the parts 5, 6, 11, 12 are arranged perpendicular or substantially perpendicular to the first guiding 2 during operation of the cleaning system 1.

[0117] In FIG. 10 specific details of a second drive system 27 of a cleaning system 1 in accordance with at least some embodiments of the present invention are illustrated. The second drive system 27 is configured to move parts of the cleaning system 1 along the first guiding 2, the second guiding 4 and the third guiding 10. For example, the parts 5, 6, 11, 12 of the cleaning system 1 are configured to simultaneously move over a surface 9 of an object 3. The second drive system 27 is typically coupled to the third guiding 10. The second drive system 27 may, for example, comprise an electric motor and optionally a gear. Additionally, the second drive system 27 may comprise a first wheel 22, a second wheel 23 and a third wheel 24. The first wheel 22 or so-called driving wheel may be connected to the electric motor or gear. Clockwise rotation of the first wheel 22 caused by driving the electric motor results in anti-clockwise rotation of the second wheel 23 and the third wheel 24, which are both in mechanical contact with the first wheel 22. Accordingly, anti-clockwise rotation of the first wheel 22 caused by respective driving the electric motor results in clockwise rotation of the second wheel 23 and the third wheel 24, which are both in mechanical contact with the first wheel 22. The second wheel 23 and the third wheel 24 are in mechanical contact with a groove comprised by the third guiding 10. Consequently, parts 5, 6, 11, 12 of the cleaning system 1 can be moved in two directions along the first guiding 2, the second guiding 4 and the third guiding 10.

[0118] According to certain embodiments, the second drive system 27 may be configured to be inclined relative to the fourth part 12. Thus, movability of the parts 5, 6, 11, 12 can be improved. This feature is of importance in case of complex curved structures to be cleaned. Instead or in addition also the first drive system 25 as shown in FIG. 9 may be configured to be inclined relative to the first part 5.

[0119] In FIG. 11 a schematic perspective view of a yet further cleaning system 1 in accordance with at least some embodiments of the present invention is illustrated. The cleaning system 1 comprises a first guiding 2 configured to be coupled to an object 3, a second guiding 4 configured to be coupled to the object 3 such that the second guiding 4 is arranged at a distance from the first guiding 2, and a third guiding 10 configured to be coupled to the object 3 such that the third guiding 10 is arranged at a distance from the first guiding 2 and the second guiding 4.

[0120] Further, the cleaning system 1 comprises a first part 5 movably coupled to the first guiding 2, a second part 6 movably coupled to the second guiding 4, a third part 11 coupled to the second part 6, wherein the second part 6 and the third part 11 are coupled to each other via a first joint 14, and a fourth part 12 movably coupled to the third guiding 10. The first part 5 is movable relative to the second part 6 and the third part 11 is movable relative to the fourth part 12. Cleaning elements 7 are coupled to each of the first part 5, the second part 6, the third part 11 and the fourth part 12.

[0121] Additionally, the cleaning system 1 further comprises at least one of a first drive system 25 and a second drive system 27. A drive system means that it is configured to simultaneously move the first part 5, the second part 6, the third part 11 and the fourth part 12 along the first guiding 2, the second guiding 4 and the third guiding 10. Thus, the cleaning system 1 is configured to move along a curved or planar surface. For example, the parts 5, 6, 11, 12 of the cleaning system 1 are configured to simultaneously move over a surface 9 of an object 3. The surface 9 may be a window surface of a ship, for instance. Examples of first and second drive systems 25, 27 are described in connection with FIGS. 9 and 10. The first drive system 25 is typically coupled to the first guiding 2 and/or the second drive system 27 is typically coupled to the third guiding 10.

[0122] According to certain embodiments, the cleaning system 1 may additionally comprise an angle sensor as described in connection with FIG. 9. The angle sensor is typically coupled to the first part 5 and configured to indicate the correct speed for the second drive system 27. Thus, the angle of the first part 5, the second part 6, the third part 11 and the fourth part 12 can be kept all the time perpendicular or substantially perpendicular in relation to the first guiding 2, for instance. This function is performed automatically and is part of the machine automation system.

[0123] In FIG. 12 specific details of a drive system of a cleaning system 1 in accordance with at least some embodiments of the present invention are illustrated. An energy chain 28 is shown for providing the drive system with electric energy from an energy source. The energy chain 28 guides flexible electrical cables to the electric motor of the drive system. Use of an energy chain reduces wear and stress on the cables and prevents entanglement. The cleaning system 1 comprises typically at least one energy chain 28. However, according to certain embodiments of the present invention, one energy chain 28 may be provided for each drive system of the cleaning system 1. The electric energy source may be, for example, comprised by an electric network of a ship or building.

[0124] According to certain embodiments of the present invention, the energy chain 28 also includes at least one water hose for providing fresh water to the cleaning system 1.

[0125] In FIG. 13 specific details of a further drive system of a cleaning system in accordance with at least some embodiments of the present invention are illustrated. A housing 29 is shown in which the energy chain 28 of FIG. 12 may be arranged.

[0126] It is to be understood that the embodiments of the invention disclosed are not limited to the particular structures, process steps, or materials disclosed herein, but are extended to equivalents thereof as would be recognized by those ordinarily skilled in the relevant arts. It should also be understood that terminology employed herein is used for the purpose of describing particular embodiments only and is not intended to be limiting.

[0127] Reference throughout this specification to one embodiment or an embodiment means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Where reference is made to a numerical value using a term such as, for example, about or substantially, the exact numerical value is also disclosed.

[0128] As used herein, a plurality of items, structural elements, compositional elements, and/or materials may be presented in a common list for convenience. However, these lists should be construed as though each member of the list is individually identified as a separate and unique member. Thus, no individual member of such list should be construed as a de facto equivalent of any other member of the same list solely based on their presentation in a common group without indications to the contrary. In addition, various embodiments and example of the present invention may be referred to herein along with alternatives for the various components thereof. It is understood that such embodiments, examples, and alternatives are not to be construed as de facto equivalents of one another, but are to be considered as separate and autonomous representations of the present invention.

[0129] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided, such as examples of lengths, widths, shapes, etc., to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

[0130] While the forgoing examples are illustrative of the principles of the present invention in one or more particular applications, it will be apparent to those of ordinary skill in the art that numerous modifications in form, usage and details of implementation can be made without the exercise of inventive faculty, and without departing from the principles and concepts of the invention. Accordingly, it is not intended that the invention be limited, except as by the claims set forth below.

[0131] The verbs “to comprise” and “to include” are used in this document as open limitations that neither exclude nor require the existence of also un-recited features. The features recited in depending claims are mutually freely combinable unless otherwise explicitly stated. Furthermore, it is to be understood that the use of “a” or “an”, that is, a singular form, throughout this document does not exclude a plurality.

INDUSTRIAL APPLICABILITY

[0132] At least some embodiments of the present invention find industrial application in cleaning of surfaces such as surfaces of buildings or window surfaces of passenger ships or cruise ships.

REFERENCE SIGNS LIST

[0133] 1 cleaning system

[0134] 2 first guiding

[0135] 3 object

[0136] 4 second guiding

[0137] 5 first part

[0138] 6 second part

[0139] 7 cleaning elements

[0140] 8 fresh water connector

[0141] 9 surface

[0142] 10 third guiding

[0143] 11 third part

[0144] 12 fourth part

[0145] 13 first ball joint

[0146] 14 hinge joint

[0147] 15 second ball joint

[0148] 16 cleaning area

[0149] 17 direction of movement of cleaning system

[0150] 18 direction of movement of first part in relation to second part

[0151] 19 direction of movement of third part in relation to fourth part

[0152] 20 fresh water outlet

[0153] 21 window element

[0154] 22 first driving wheel

[0155] 23 second driving wheel

[0156] 24 third driving wheel

[0157] 25 first drive system

[0158] 26 angle sensor

[0159] 27 second driving unit

[0160] 28 energy chain

[0161] 29 housing

CITATION LIST

Patent Literature

[0162] DE 3538078 A1

Non Patent Literature

[0163]