Claims:We Claim:

1) Asurface cleaning robotic system(100)comprising:
• a first rigid pipe (20) supported by a pipe support (21);
• a plurality of bearings (22) disposed inside the first rigid support (20);
• a first rigid shaft (25) extending through said bearings (22) and said first rigid pipe (20);
• a flexible shaft (30)in connection with said rigid shaft (25);
• a rotating arrangement (40) selectively configured to rotate said firstrigid shaft (25) and thereby said flexible shaft (30);
• a filter pipe (50)in flow connection with said first rigid pipe (20);
• a flexible pipe (60) extending from said first rigid pipe (20)such that said flexible shaft (30) nest within said flexible pipe60and a space (31) being defined between the inner diameter (60a) of the flexible pipe (60) and the outer diameter (30a) of the flexible shaft (30);
• at least oneholder (70), each holder (70)being in connection with said flexible pipe (60), each holder (70) defined with a second rigid shaft (65) in connection with said flexible shaft (30),each holder (70)defined with at least one suction hole (71), a power transmission mechanism (72) andat least one cleaning element (73),
wherein, said at least one suction hole (71) is in flow communication with the space (31); said power transmission mechanism (72) is in rotational connection with said second rigid shaft (65); andsaid at least one cleaning element(73) is in rotational connection with said power transmission mechanism (72), each cleaning element(73) is configured to remove foreign particles adhered to at least one surface (S1, S2);
• at least one suction motor(80) selectivelyconfigured to create suction air stream in the space(31) and at said suction hole (71) such thatsuction air streamsuck removed foreign particles through said suction hole (71) and travel in the space to said filter pipe (50); and
• a filter arrangement (90) configured to receive suction air stream having sucked foreign particles through said filter pipe (50),said filter arrangement (90) configured to clean suction air stream by separating sucked foreign particles therefrom, cleaned suction air stream directed to said suction motor (80).

2) The system (100) as claimed in claim 1,wherein said rotating arrangement (40) comprises a rotating motor (41) and a power transmitter (42) configured to transmit rotating motion of said rotating motor (41) to said first rigid shaft (25).

3) The system (100) as claimed in claim 1, whereinsaid second rigid shaft (65) is connected to a driver gear (72a), said driver gear (72a) configured to rotate adjacently disposed driven gears (72b), wherein the assembly of said driver gear (72a) and said driven gears (72b) form said power transmission mechanism (72), each of said driven gears (72b) is connected with respective cleaning brushes (73).

4) The system (100) as claimed in claim 3,wherein when said cleaning brushes (73) configured to receive an object (74) therebetween such that multiple surfaces (S1, S2) of said object (74) are simultaneously cleaned or said cleaning brushes (73) configured to clean one surface at a time.

5) The system (100) as claimed in claim 1, wherein saidrotating arrangement (40) and said suction motor (80) are simultaneously actuated or selectively actuated.

6) The system (100) as claimed in claim 1, wherein said first rigid pipe (20), said pipe support (21), said rotating arrangement (40), said at least one suction motor (80) and said filter arrangement (90) is housed in a housing (10).

7) The system (100) as claimed in claim 1, wherein said rotating arrangement (40) and said suction motor (80) are controlled by a control system (95).

8) A method for surface cleaning, said method comprising:

• providing a surface cleaning robotic system (100) defined with:
o a first rigid pipe (20) having disposed internally a plurality of bearings (22);

o a first rigid shaft (25) extending through said bearings (22) and said first rigid pipe (20);

o a flexible shaft (30) in connection with said first rigid pipe (20);

o a rotating arrangement (40) in rotational connection with said first rigid shaft (25) and thereby said flexible shaft (30);

o a filter pipe(50) in flow connection with said first rigid pipe (20);

o a flexible pipe (60) extending from said first rigid pipe (20) such that said flexible shaft (30) nest within said flexible pipe(60) and a space (31) being defined between the inner diameter (60a) of the flexible pipe (60) and the outer diameter (30a) of the flexible shaft (30);

o at least one holder (70), each holder (70) being in connection with said flexible pipe (60), each holder (70) defined with a second rigid shaft (65) in connection with said flexible shaft (30), each holder (70) defined with at least one suction hole (71), a power transmission mechanism (72) and at least one cleaning element (73),
wherein, said at least one suction hole (71) is in flow communication with the space (31); said power transmission mechanism (72) is in rotational connection with said second rigid shaft (65); and said at least one cleaning element (73) is in rotational connection with said power transmission mechanism (72), each cleaning element (73) is configured to remove foreign particles adhered to at least one surface (S1, S2);

o at least one suction motor (80) selectively configured to create suction air stream in the space and at said suction hole (71), suction air stream suck removed foreign particles through said suction hole (71) and travel in the space to said filter pipe (50); and

o a filter arrangement (90) configured to receive suction air stream having sucked foreign particles through said filter pipe (50), said filter arrangement (90) configured to clean suction air stream by separating sucked foreign particles therefrom, cleaned suction air stream directed to said suction motor (80);

• actuating said rotating arrangement (40)to rotate said first rigidshaft (25), rotation of said firstrigid shaft (25) sequentially rotates said flexible shaft (30), said second rigid shaft (65), said power transmission mechanism (72) and said at least one cleaning element (73); and

• actuatingsaid suction motor (80) to create and allow suction air streamsuck removed foreign particles through said suction hole (71) and further allow travel in the space (31) to said filter pipe (50) and said filter arrangement (90), said filter arrangement (90) configured to clean suction air stream by separating sucked foreign particles therefrom, cleaned suction air stream directed to said suction motor (80),
wherein, said rotating arrangement (40) and said suction motor (80)are selectively actuated to achieve:

- simultaneous actuation of said rotating arrangement (40) and said suction motor (80);
- actuation of said rotating arrangement (40); and
- actuation of said suction motor (80) and thereby said filter arrangement.

9) The method as claimed in claim 8, wherein actuating said rotating arrangement (40) sequentially rotates said first rigid shaft (25), said flexible shaft (30), said second rigid shaft (65), a driver gear (72a)and said driver gear (72a) rotates adjacently disposed driven gears (72b), wherein the assembly of said driver gear (72a) and said driven gears (72b) form said power transmission mechanism (72), each of said driven gears (72b) is connected with respective cleaning brushes (73), said cleaning brushes (73) configured to receive an object (74) therebetween for simultaneously cleaning multiple surfaces (S1 and S2) or said cleaning brushes (73) configured to clean one surface (S1 or S2) at a time.

10) The method as claimed in claim 8, wherein controlling actuation of said rotating arrangement (40) and said suction motor (80) by a control system (95).

DATED THIS 30thday of July, 2020

GARGI AMOL PHADATARE (IN/PA/2209)
PATENT AGENT OF APPLICANT

, Description:
FORM – 2

THE PATENTS ACT, 1970
(39 of 1970)

&

THE PATENTS RULES, 2003

COMPLETE SPECIFICATION
(See section 10 and rule 13)

SURFACE CLEANING ROBOTIC SYSTEM AND
METHOD FOR SURFACE CLEANING

NIRMITEE ROBOTICS INDIA LIMITED
An Indian Company of
PLOT NO. D3/2, MIDC IndustrialArea,
Hingna, TahsilHingna
City:Nagpur, State:Maharashtra,
Country: India, Pin Code: 440028

The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD
[1] The present disclosure relates toa surface cleaning robotic system and method for surface cleaning, whereinthe robotic system is capable to perform simultaneous operations. Particularly, the present disclosure relates to a surface cleaning robotic system and method for surface cleaning that is more efficient, performs operations in reduced time, provides better cleaning effectwithout causingforeign particleslittering in surrounding areas after the removal of foreign particles from the surface(s).

BACKGROUND
Surface cleaning robotic systems are known in the prior art, for example from patent documents US6883201, US6381802 and EP2417892, which are used for cleaning surfaces by different systems and methods. The autonomous floor-cleaning robot of the patent document US6883201 discloses a self-adjusting cleaning head which includes a vacuum system and a brush assemblywith other elements. However, the vacuum system and primary brush are independent brush mechanisms both structurally and functionally and cannot be used to clean multiple surfaces simultaneously. The brush assembly of a vacuum cleaner of US6381802 though hasa rotary brush that rotates to brush off dust on a cleaning surface and facilitate suction of the dust from the cleaning surface into the vacuum cleaner along with edge brushes integrated bumper, however, the edge brushes are stationary and requires human forcewhile cleaning resulting in tedious task. Also, the spiral shape of the rotary brush may not result in efficient dust removal because of less surface contact and cannot clean multiple surfaces simultaneously. The robot cleaner of the patent document EP2417892 disclosesa robot cleaner which has an agitator and a dust suction unit, wherein the rotational movement of the agitator causesthe dust to collect from the ground to the dust suction unit.

[2] The known surface cleaning robotic systems, however, does not provide efficient cleaning of multiple surfaces such as either surfaces of a fan and hence the cleaning is required to be manually done. The manual cleaning also causes the dirt or dust to litter on the floor. Further, in an attachment of the robotic system there is a provision of one or more brush(es) and suction inlets. However, the brushes are stationary and do not render effective cleaning and cleaning of multiple surfaces simultaneously.

OBJECTS
[3] Some of the objects of the arrangement of the present disclosure are aimed to ameliorate one or more problems of the prior art or to at least provide a useful alternative and are listed herein below.

An object of the present disclosure is to providea surface cleaning robotic system that performs simultaneous cleaning operations for cleaning at least one surface at the same time.

Another object of the present disclosure is to providea surface cleaning robotic system that has a single integral unit that provides actuating at least one cleaning element and provides suction of foreign particles.

Still another object of the present disclosure is to provide a surface cleaning robotic system that reduces or completely eliminates littering of foreign particles removed from a surface thereby reduces cross-contamination and additional work to clean the littered foreign particles and thus saves time.

Yet another object of the present disclosure is to provide a method for surface cleaning that simultaneously performs cleaning operations that saves on time.

Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present disclosure.

SUMMARY

[4] The surface cleaning robotic system according to the invention in comparison has the advantagesto provide simultaneous cleaning and suction offoreign particles from at least one surface of an object and the simultaneous cleaning and suction of foreign particles prevents foreign particles from being littered in the surrounding. The surface cleaning robotic system includes a first rigid pipe, a plurality of bearings, a first rigid shaft, a flexible shaft, a rotating arrangement, a filter pipe, a flexible pipe, at least one holder, at least one suction motor and a filter arrangement. The first rigid pipe is supported by a pipe support. The plurality of bearings is disposed inside the first rigid support. The first rigid shaft extends through the bearings and the first rigid pipe. The flexible shaft is in connection with the first rigid shaft. The filter pipe is in flow connection with thefirst rigid pipe.The flexible pipeextends from the first rigid pipe such that the flexible shaft nest within the flexible pipe and a space is defined between the inner diameter of the flexible pipe and the outer diameter of the flexible shaft. Each holder is connected with the flexible pipe.Each holder is defined with a second rigid shaft which is in connection with the flexible shaft. Each holder is defined with at least one suction hole, a power transmission mechanism and at least one cleaning element. The at least one suction hole is in flow communication with the space.The power transmission mechanism is in rotational connection with thesecond rigid shaft.The at least one cleaning element is in rotational connection with the power transmission mechanism.Upon rotation, each cleaning element removes foreign particles adhered to at least one surface. The at least one suction motorselectively creates suction air stream in the space and at the suction hole such that suction air stream suck removed foreign particles through the suction hole and travel in the space to thefilter pipe. The filter arrangement receives suction air stream having sucked foreign particles through thefilter pipe.The filter arrangement cleans suction air stream by separating sucked foreign particles therefrom, cleaned suction air stream directed to the suction motor. The foreign particles herein can be sticky dirt/dust, granular dirt/dust, loose dirt/dust, fine dirt/dust, powdered dirt/dust or semi liquid form dirt/dust.

[5] In one embodiment, the use of multiple cleaning brushes receives an object therebetween such that multiple surfaces of the object are simultaneously cleaned or the cleaning brushes configured to clean one surface of an object at a time.

[6] A method for surface cleaning, in accordance with one embodiment, includes:
• providing a surface cleaning robotic system which is defined with:
o a first rigid pipe having disposed internally a plurality of bearings;
o a first rigid shaft extending through the bearings and the first rigid pipe;
o a flexible shaft in connection with said first rigid shaft;
o a rotating arrangement in rotational connection with thefirst rigid shaft and thereby said flexible shaft;
o a filter pipe in flow connection with the first rigid pipe;
o a flexible pipe extending from the first rigid pipe such that the flexible shaft nest within the flexible pipe and a space is defined between the inner diameter of the flexible pipe and the outer diameter of the flexible shaft;
o at least one holder, each holder is in connection with the flexible pipe, each holder is defined with a second rigid shaft is in connection with the flexible shaft, each holder is defined with at least one suction hole, a power transmission mechanism and at least one cleaning element,
wherein, the at least one suction hole is in flow communication with the space; the power transmission mechanism is in rotational connection with thesecond rigid shaft; and the at least one cleaning element is in rotational connection with the power transmission mechanism, each cleaning element configured to remove foreign particles adhered to at least one surface; and
o at least one suction motor selectively configured to create suction air stream in the space and at the suction hole, suction air stream suck removed foreign particles through the suction hole and travel in the space to thefilter pipe; and
o a filter arrangement configured to receive suction air stream having sucked foreign particles through said filter pipe, the filter arrangement configured to clean suction air stream by separating sucked foreign particles therefrom, cleaned suction air stream directed to the suction motor;
• actuating the rotating arrangement to sequentially rotate thefirst rigid shaft, the flexible shaft, the second rigid shaft,the power transmission mechanism and the at least one cleaning element; and
• actuating the suction motor to create and allow suction air stream suck removed foreign particles through the suction hole and further allow travel in the space to the filter pipe and the filter arrangement, the filter arrangement configured to clean suction air stream by separating sucked foreign particles therefrom, cleaned suction air stream directed to the suction motor,
wherein, the rotating arrangement and the suction motor are selectively actuated to achieve:
- simultaneous actuation of the rotating arrangement and the suction motor;
- actuation of the rotating arrangement; and
- actuation of said suction motor.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
[7] The present disclosure will now be described with the help of the accompanying drawings, in which:

Figure 1 illustrates aperspectiveside view of a surface cleaning system, in accordance with one embodiment of the present disclosure;

Figure 2 illustrates a perspective assembly of a rotating arrangement, a first rigid pipe, a filter pipe, a flexible pipe and a flexible shaft of the surface cleaning system of the Figure 1, wherein a pipe support is illustrated in connection with the first rigid pipe;

Figure 3illustrates a front view of the assembly of the rotating arrangement, the first rigid pipe, thefilter pipeof the Figure 2, wherein the first rigid pipe is provided with a plurality of bearings;

Figure 4illustrates a side view a rotating arrangement of the Figure 1, wherein the rotating arrangement includes a rotating motor and a power transmitter;

Figure 5 illustrates a front view of the first rigid pipe and the filter pipe of the Figure 2 clamped with a clamp;

Figure 6illustrates asectional view of aholder of the surface cleaning system of the Figure 1, in accordance with a first embodiment of the present disclosure, wherein the holder is in connection with asecond rigid shaft and depicts a power transmission mechanism and two cleaning elements;

Figure 7 illustrates a perspective view of the holder of Figure 6, wherein the cleaning elements clean the upper and lower surfaces of a fan simultaneously;

Figure 8 illustrates an exploded view of the holder of Figure 6;

Figure 9 illustrates a perspective view of a holder, in accordance with a second embodiment of the present disclosure;

Figure 10 illustrates a cross-sectional view of the holder of Figure 9;

Figure 11 illustrates anexploded view of the holder of Figure 9;

Figure 12illustrates a perspective view of another holderin accordance with a third embodiment having one cleaning element;

Figure 13 illustrates a perspective view of yet another holder in accordance with a fourth embodiment having cleaning elements;

Figure 14 illustrates an exploded view of the holder of Figure 13;

Figure 15 illustrates a sectional view of the holder of Figure 13;

Figure 16 illustrates aninternal view of a housing having the rotating arrangement and a filter arrangement;

Figure 17 illustrates a cross-sectional representation of the filter arrangement of the Figure 16; and

Figure 18 illustrates an internal view of the flow of foreign particles in the surface cleaning robotic system; and

Figure 19 illustrates a perspective view of a control system fitted in the housing of the Figure 16.

DETAILED DESCRIPTION

[8] Referring now to the drawings, Figures 1 to 19, where the present invention is generally referred to with numeral (100), it can be observed that asurface cleaning robotic system, in accordance with an embodiment, is provided for cleaning any internal or external surfaces thatincludesa housing (10), a first rigid pipe (20), a plurality of bearings (22), a first rigid shaft (25), a flexible shaft (30), a rotating arrangement (40), a filter pipe (50), a flexible pipe (60), at least one holder (70), at least one suction motor (80) and a filter arrangement (90).

[9] The housing (10) supports thefirst rigid pipe (20), the rotating arrangement (40), the filter pipe (50), the at least one suction motor (80) and the filter arrangement (90) and thus makes a compact arrangement.The housing (10) is provided with wheels (11) for enabling the easy movement of the housing (10) at desired places. The first rigid pipe (20) is supported by a pipe support (21). In one embodiment, the pipe support (21) suspends from an upper wall/ceiling of the housing (10), as shown in Figure 1 and connects the first rigid pipe (20) with the housing (10). In another embodiment, the pipe support (21) stands on the lower wall/base of the housing (10) to provide rigid support to the first rigid pipe (21). The plurality of bearings (22) is positioned within one end of the first rigid pipe (20) such that the outer race (not illustrated in Figures) of the bearing is stationary and the inner race (not illustrated in Figures) is rotating.

[10] The first rigid shaft (25) is introduced in the bearings (22) and extendsin the first rigid pipe (20). The flexible shaft (30) is connected to the first rigid shaft (25). In an operative configuration, the first rigid shaft (25) and the flexible shaft (30) transmit rotational movement. Typically, the flexible shaft (30) is made of wire ropes or coil.

[11] The rotating arrangement (40) is selectively configured to rotate the first rigid shaft (25) and thereby the flexible shaft (30). In one embodiment as illustrated in Figures 2 to 5, the rotating arrangement (40) includes a rotating motor (41) and a power transmitter (42). Typically, the rotating motor is an electric motor. As illustrated in Figure 1, the rotating motor (41) is mounted on the housing (10). The power transmitter (42) is configured to transmit rotating motion of the rotating motor (41) to the first rigid shaft (25). In one embodiment, the power transmitter (42) includes a driver pulley (42a) and a driven pulley (42b) and a belt (42c) which mechanically links the driver pulley (42a) and the driven pulley (42b). The driver pulley (42a) is connected with the rotating motor (41) and the driven pulley (42b) is connected to the first rigid shaft (25). When the rotating motor (41) is actuated, the driver pulley (42a) rotates and which causes rotation of the driven pulley (42b) through the belt (42c).The rotation of the driven pulley (42b) rotates the first rigid shaft (25). The rotation of the first rigid shaft (25) rotates the flexible shaft (30).Though the present disclosure is described with the power transmitter (42) as the belt and pulley drive, however, the present disclosure is not limited to the use of the belt and the pulley drive and any other power transmitters such as gear drive, chain and pulley drive and other power transmitters known in the art can be used instead of the belt and pulley drive.

[12] As illustrated in Figures 2, 3 and 5, the filter pipe (50) is in flow connection with the first rigid pipe (20). The filter pipe (50) connects the first rigid pipe (20) with the filter arrangement (90) and establishes flow connection therebetween. In one embodiment, the filter pipe (50) includes a flexible filter pipe (50a) and a rigid filter pipe (50b) which is connected to the flexible filter pipe (50a) by use of a coupling (50c). The flexible filter pipe (50a) is connected to the first rigid pipe (20) and the rigid filter pipe (50b) is connected to the filter arrangement (90). The filter pipe (50) is extended from the longitudinal portion of the first rigid pipe (20). The filter pipe (50) and the first rigid pipe (20) are clamped by use of a clamp (51).

[13] The flexible pipe (60) is in detachable connection with the first rigid pipe (20) and extends from the first rigid pipe (20) such that the flexible shaft (30) nests within the flexible pipe (30). A space (31) is defined between the inner diameter (60a) of the flexible pipe (60) and the outer diameter (30a) of the flexible shaft (30). The flexible pipe (60) and the flexible shaft (30) are both flexible so as to easily handle and bend in any direction.The flexibility of the flexible pipe (60) and the flexible shaft (30) provides advantages to clean any surface such as an internal surface and an outer surface and can be twisted and turned in any direction as per requirement.

[14] The at least one holder (70) has a second rigid shaft (65) which is connected to the flexible shaft (30). In one embodiment only one holder (70) can be provided or alternatively a number of holders (70) can be provided as illustrated in Figures 7, 9 and 12. The holders (70) can be detachable with the flexible pipe (60) and upon need the desired holder (70) can be attached with the flexible pipe (60). The fitment between the holder (70) can be a press fitment, a threaded fitment and similar other fitments that provides removable connection with the flexible pipe (60). Alternatively, the holder (70) can have non-removable connection with the flexible pipe (60).Each holder (70) is defined with at least one suction hole (71), a power transmission mechanism (72) and at least one cleaning element (73). The at least one suction hole (71) is in flow communication with the space (31).The power transmission mechanism (72) is in rotational connection with the flexible shaft (30). As illustrated in Figure 6 and 8, the power transmission mechanism (72) includes a driver gear (72a) and a pair driven gear (72b) adjacently disposed on either side of the driver gear (72a). The driver gear (72a) is connected with the second rigid shaft (65) and is configured to rotate with the second rigid shaft (65).The rotation of the driver gear (72a) rotates the driven gears (72b). The driven gears (72b) are connected with the cleaning elements (73).Alternatively, as illustrated in Figures 9 to 11, the holder (70) is of a different configuration and has the power transmission mechanism (72) as the bevel gear assembly and two cleaning elements (73) are provided on either side. Yet in another embodiment as shown in Figure 12, there is only one cleaning element (73). The cleaning element (73)can be brushes or scrubbers. The rotation of the cleaning element(s) (73)causes cleaning of one or more surfaces (S1 and/or S2) by removal of foreign particles disposed on the object (74). As illustrated in Figure 7, the cleaning elements (73) simultaneously clean both the surfaces of the object (74) which is a fan blade and is the best-operational mode of working.Alternatively, only one surface can be cleaned typically by the holder (70) of the Figures 9 and 12. In still another embodiment as illustrated in Figures 13 to 15, the holder (70) holds the cleaning elements (73) that are positioned in such a way to clean circular objects (not shown) such as internal cleaning of circular ducts or any confined region which may not be circular. The holder (70) is mounted on a moveable vehicle (77) which can hold the holder (70) and move inside the circular ducts of confined regions.The moveable vehicle (77) can be provided with a lifting mechanism (77a) that facilitates lifting and lowering of the holder (70). The lifting and lowering can be performed by a rotating wheel (77b).The holder (70) can be designed or modified based on the surface to be cleaned and not limited to once shown in the Figures 7, 9,12 and 13. In one embodiment, the holder (70) can be provided with a handle (75) for holding.

[15] The at least one suction motor (80) is positioned in the housing (10). The at least one suction motor (80) in an operative configuration configured to create suction air stream in the space (31) and at the suction hole (71) such that suction air stream suck removed foreign particles through the suction hole (71) and travel in the space to thefilter pipe (50).

[16] The filter arrangement (90) is also positioned in the housing (10). The inlet (91a) of the filter arrangement (90) is connected with the rigid filter pipe (50b) of the filter pipe (50) and receives suction air stream having sucked foreign particles from thefilter pipe (50).The filter arrangement (90) cleans suction air stream by separating sucked foreign particles therefrom.Cleaned suction air stream is directed to the suction motor (80). In one non-limited embodiment, the filter arrangement (90) is a six-stage filter. Typically, HEPA filters can be utilized that provides six-stages of filtration. The suction air stream having sucked foreign particles first enters a filter bag (91) which is in connection with the filter pipe (50). The filter bag (91) provides three layers which provide three-stages of filtration. After passing through the filter bag (91), the suction air stream passes through fourth and fifth stages (92) of filtrations made of two different layers of materials. The suction air stream passes through the last stage (93) of filtration and the filtered/cleaned suction air stream passes to the at least one suction motor (80). The cleaned suction air stream is exhausted to the atmosphere through the suction motor (80).In one embodiment, the filter arrangement (90) includes an enzyme filter (not shown in Figures) in which filters the enzymes passing through. The enzyme filter can be provided at any stage of the filtration process for example at the first three-stages provided by the filter bag (91) or fourth and fifth stages (92) of the last stage (93). Alternatively, the enzyme filter can be an additional filtration layer. The filter arrangement (90) enables to prevent foreign particles/dirt/dust to enter the environment and thus provides pollution-free cleaning and prevents cross contamination.The provision of the filter arrangement (90) protects users from being exposed to foreign particles/dirt/dust and hence provides health safety. The filter arrangement (90) is not limited to the above description and can be modified by increasing or decreasing filtration stages based on the requirement of a user.

[17] In one embodiment, the rotating arrangement (40) and the suction motor (80) are simultaneously operated to achieve cleaning operation and suction operation simultaneously. The simultaneous operation is the best working mode as the cleaning and suction results in less littering of removed foreign particles on the floor. In another embodiment, only the rotating arrangement (40) can be operated to achieve cleaning operation only. In still another embodiment, only the suction motor (80) can be operated to achieve suction operation only.

[18] In one embodiment, the housing (10) is provided with a control system (95) that enables to operate the rotating arrangement (40) and the suction motor (80). The operation by the use of the control system (95) is easy for the users. The control system (95) includes a control panel (95a) and a display screen (95b). The control panel (95a) can be operated to provide selective and simultaneous operations of the rotating arrangement (40) and the suction motor (80). The control panel (95a) can be operated for controlling the speed of the rotating arrangement (40). The control panel (95a) can be operated to adjust the suction pressure of the suction motor (80). In one embodiment, the control panel (95a) can control operations of various other robots linked with the control panel (95a).The display screen (95b) provides real-time viewing of the cleaning operation upon installation of at least one camera (76) disposed on the holder (70). The camera (76) can have wired connection or wireless connection. The surface cleaning robotic system (100) has configuration to be plugged to a power-point to receive electrical power. Further, the surface cleaning robotic system (100) can be provided with different analog or digital meters to display various parameters such as RPM of the rotating motor (41) or operation time. The surface cleaning robotic system (100) is additionally provided with an emergency stop button (not illustrated in Figures) that shuts all active operations such as the rotating arrangement (40) and the suction motor (80) immediately after the pressing of the emergency stop button.

[19] The present disclosure also provides a method for surface cleaning, in accordance with one embodiment of the present disclosure. The method includes providing the surface cleaning robotic system (100). As disclosed, the surface cleaning robotic system (100) includes the first rigid pipe (20), the first rigid shaft (25), the flexible shaft (30), the rotating arrangement (40), the filter pipe (50),the flexible pipe (60), the at least one holder (70), the at least one suction motor (80) and the filter arrangement (90).The first rigid pipe (20) has disposed internally the plurality of bearings (22). The first rigid shaft (25) is introduced in the bearings (22) and extends in the first rigid pipe (20). The flexible shaft (30) is connected to the first rigid shaft (25). The rotating arrangement (40) is in rotational connection with the first rigid shaft (25) and thereby the flexible shaft (30).The filterpipe (50) in flow connection with the first rigid pipe (20). The flexible pipe (60) extends from the first rigid pipe (20) such that the flexible shaft (30) nest within the flexible pipe (30) and the space (31) is defined between the inner diameter (60a) of the flexible pipe (60) and the outer diameter (30a) of the flexible shaft (30). Each holder (70) has the second rigid shaft (65) which is in connection with the flexible pipe (60).Each holder (70) is defined with the at least one suction hole (71), the power transmission mechanism (72) and the at least one cleaning element (73).The at least one suction hole (71) is in flow communication with the space (31).The power transmission mechanism (72) is in rotational connection with the second rigid shaft (65); and the at least one cleaning element (73) is in rotational connection with the power transmission mechanism (72).Each cleaning element (73) is configured to remove foreign particles adhered to the at least one surface (S1, S2). The arrangement of the cleaning element (73), the required number of cleaning element (73) depends on the type and number of surfaces to be cleaned and the surfaces to be cleaned are not limited to the two surfaces (S1, S2) as illustrated and any number of surfaces can be cleaned by modifying arrangement and the number of cleaning elements (73). The at least one suction motor (80) is selectively configured to create suction air stream in the space and at the suction hole (71).The suction air stream sucks removed foreign particles through the suction hole (71) and travels in space to thefilter pipe (50).The filter arrangement (90) receives suction air stream having sucked foreign particles through thefilter pipe (50).The filter arrangement (90) cleans suction air stream by separating sucked foreign particles therefrom, cleaned suction air stream directed to the suction motor (80).

[20] Actuating the rotating arrangement (40) forsequentially rotatingthefirst rigid shaft (25), the flexible shaft (30) and the second rigid shaft (65).The second rigid shaft (65) rotates the power transmission mechanism (72) which in turn rotatesthe at least one cleaning element (73). The rotation of the cleaning element (73) cleans the at least one surface (S1, S2) when contact is established between the cleaning element (73) and the at least one surface (S1, S2).

[21] Actuating the suction motor (80) to create suction air stream in the space (31) and at the suction hole (71) such that suction air stream suck removed foreign particles through the suction hole (71) and further allow travel in the space to thefilter pipe (50) and the filter arrangement (90).The filter arrangement (90) cleans suction air stream by separating sucked foreign particles therefrom and cleaned suction air stream is directed to the suction motor (80).

[22] The rotating arrangement (40) and the suction motor (80) are selectively actuated to achieve:
- simultaneous actuation of the rotating arrangement (40) and the suction motor (80) such that simultaneous cleaning of foreign particles and suction of removed foreign particles is achieved;
- actuation of said rotating arrangement (40) such that only the cleaning operation is performed; and
- actuation of the suction motor (80) such that only the suction operation is performed, said actuation of suction motor (80) actuates the filter arrangement (90) that separates the suction air stream and the sucked foreign particles.

[23] In the best working mode, simultaneous actuation of the rotating arrangement (40) and the suction motor (80) is performed and the cleaning element (73) is defined with two brushes/scrubber such that the object (74) like a fan blade is received therebetween such that either side surfaces (S1, S2) are simultaneously cleaned. Alternatively, any other surfaces can be cleaned by simultaneous cleaning and suction. The simultaneous cleaning and suction is performed because of the configuration of the flexible shaft (30) and the flexible pipe (60).

[24] The present disclosure is not limited to the arrangement as described and as illustrated and modifications or re-arrangement of different components of the surface cleaning robotic systemis within the scope of the present disclosure. For example, the flexible shaft (30) and the flexible pipe (60) can be separately arranged without being in-line such that the flexible pipe (60) is directly connected to the inlet (91a) of the filter arrangement (90) by eliminating the filter pipe (50). The provided example of re-arrangement shall not be limited to the flexible shaft (30) and the flexible pipe (60) as mentioned and any re-arrangements of any components are within the scope of the present disclosure.

[25] The foregoing description conveys the best understanding of the objectives and advantages of the present invention. Different embodiments,steps or alternatives may be made of the inventive concept of this invention. It is to be understood that all matter disclosed herein is to be interpreted merely as illustrative, and not in a limiting sense.