Debris displacement system for a guttering structure

Abstract

A debris displacement system (100) comprises: a guttering structure comprising a gutter (1); a debris displacement tool (3) configured to demarcate within the tool (3) a plurality of sections of a debris accumulating surface (30) within the guttering structure; and a torsion spring (6) and control line (8) connected to the displacement tool (3), for moving the tool (3) from a first position along the guttering structure to a second position along the guttering structure and back again. Movement of the tool (3) from the first position to the second position and back again displaces surface debris situated within the sections of the debris accumulating surface demarcated by the tool (3). The height of the tool is less than half the internal height of the gutter.

Description

[0001] Debris Displacement System for a Guttering Structure

[0002] FIELD

[0003] The present invention relates to a debris displacement system, in particular, for use in a guttering structure.

[0004] BACKGROUND

[0005] Gutters are a common feature of buildings. They are used to collect rainwater from the roof and channel it away from the building to prevent damage to the building’s foundations and walls.

[0006] However, the accumulation of debris in gutters, such as plants, leaves, insects and even snow and ice can cause significant problems for the building. Blocked gutters impede the flow of water and could potentially lead to the water damaging the building structure as well as compromising the structural integrity of the gutters themselves.

[0007] For this reason, gutters require periodic cleaning. However, this may be difficult, time consuming and often an expensive undertaking should the frequency of the cleaning increase.

[0008] It has been suggested than an active integrated gutter cleaning technology is employed to enable periodic cleaning of the gutter without requiring significant input from a user.

[0009] W02007016724A1 discloses an apparatus for removing debris collected in the channel of a gutter. The apparatus includes a debris plough fixed to a carriage, the carriage being configured to permit travel of the debris plough along the gutter so that, in use, the debris plough moves along the channel surface to strike debris collected thereon and thereby remove substantially all of that debris from the channel.

[0010] GB2584878A discloses a gutter cleaning apparatus comprising one or more cleaning devices mounted within a gutter, wherein the cleaning devices are moved backwards and forwards within the gutter via a pulley system. The cleaning devices are heavy brushed scrapers that are connected by a flexible cable, wire or chain that forms a loop that passes through a plurality of pulleys and a drive means. The driving means may be a manual winding handle or timed automatic electrical motor.

[0011] US4852308A discloses a gutter assembly with a cleaning system which facilitates the removal of debris from the channel member of the assembly. A flexible strip is disposed along the length of the bottom wall of the assembly. One end of the flexible strip is connected to the removable end cap. The other end of the flexible strip is connected to a length of rope. The rope is guided along the length of the gutter assembly by a plurality of ring bolts. When a user removes the removable end cap the flexible strip is simultaneously removed from the confines of the channel member and any debris which has accumulated on the strip is also removed. The strip is repositioned within the channel member by pulling upon the loose end of the rope until the removable end cap is in the proximity of the end of the channel member.

[0012] Existing active integrated gutter cleaning technologies are often complex, add significant weight to the gutter, have high energy cost, are inflexible and counterintuitively congest the gutter and prevent efficient functioning.

[0013] The present invention aims to mitigate at least one problem with existing gutter cleaning devices.

[0014] SUMMARY OF INVENTION

[0015] A first aspect of the invention provides a debris displacement system for a guttering structure. The gutter structure optionally comprises a gutter. The guttering structure further comprises a debris displacement tool configured to demarcate within the tool a plurality of sections of a debris accumulating surface within the guttering structure. The guttering structure also includes an input means connected to the debris displacement tool. The input means is used for moving the tool longitudinally and / or laterally relative to the guttering structure from a first position relative to the guttering structure to a second position relative to the guttering structure and back again. Movement of the debris displacement tool from the first position to the second position and back again displaces surface debris situated within the sections of the debris accumulating surface demarcated by the tool. Optionally, the height of the debris displacement tool is less than half the internal height of the gutter. Hereafter, the debris displacement tool may be referred to as just the tool.

[0016] The reciprocating movement of the tool from the first position to the second position and back to the first position effectively dislodges and displaces debris from the debris accumulating surface. Periodic reciprocating movement prevents debris from relodging on to the debris accumulating surface and hence the debris can therefore be easily displaced by the tool. The tool is preferably streamlined. When the height of the tool is less than half the internal height of the gutter, the tool is streamlined and occupies a minimal volume within the gutter and does not hinder to the gutter’s main functionality of collecting rainwater from the roof and channelling it away from the building to prevent damage to the building’s foundations and walls. The shape of the side of the tool facing the direction from the first position to the second position is preferably streamlined. The shape of the side of the tool facing the direction from the second position to the first position is preferably streamlined.

[0017] Although the tool is referred to as a debris displacement tool, it can also be equally referred to as a debris freeing tool since it frees the debris which may then either be moved due to the slope of the guttering structure combined with gravity or by the reciprocating movement of the tool.

[0018] Optionally, the length of the debris displacement tool is more than half the internal length of the gutter excluding any gutter outlet. For the avoidance of doubt, the “length” of the debris displacement tool is the length of the tool measured in a direction along the length of the guttering structure. The length of the tool being more than half the internal length of the gutter enables the tool to span more than half of the debris accumulating surface within the guttering structure. Therefore, the tool has less far to move along the guttering structure compared to a shorter tool.

[0019] Optionally, the maximum distance the tool can move along the guttering structure is less than half the internal length of the gutter excluding any gutter outlet. The short distance that the tool can move along the guttering structure would result in a shorter movement of the tool between the first and second position. The shorter movement is advantageous as it would require lesser mechanical effort and would make the tool quicker to operate. Optionally, the height of the tool is less than 25mm, and optionally less than 15mm.

[0020] Optionally, the tool is in contact with and lies on the debris accumulating surface.

[0021] Optionally, the tool comprises a body (preferably a central body), and at least one arm or blade that extends, preferably outwardly, from the body.

[0022] Optionally, a side of the at least one arm of the tool is in contact with the debris accumulating surface.

[0023] Optionally, at least one of the arm and the body of the tool may be formed of a wire. In this way, the tool may be strong, adaptable in shape, lightweight and cost effective.

[0024] Optionally, the at least one arm of the tool is detachable. The detachability of the arm allows the tool to not only have various configurations of arms and other features but also improves reparability of the tool.

[0025] Optionally, the at least one arm of the tool is oriented at a right angle to the body when viewed in a plan view.

[0026] Optionally, the at least one arm of the tool is oriented at an oblique angle to the body when viewed in plan view.

[0027] The orientation of the arm to the body may be configurable depending on the location where the tool is installed and also the debris it is generally expected to displace. For example, debris such as small rocks may benefit from an arm oriented at an oblique angle to collect (funnel) the small rocks together. The collected debris may then group towards the body and would eventually pile up. The backwards and forwards motion of the tool may push the piled up debris from one section of the plurality of sections of the debris accumulating surface to a second section of the plurality of sections of the debris accumulating surface. Each arm may be oriented at the same angle or at different angles. Optionally, the at least one arm of the tool is angled forward, that is, towards a gutter outlet end side.

[0028] Preferably, the at least one arm of the tool is oriented at an angle between 5 degrees to 85 degrees to the body when viewed in plan view. More preferably, the at least one arm of the tool is oriented at an angle between 10 degrees to 80 degrees to the body when viewed in plan view. More preferably, the at least one arm of the tool is oriented at an angle between 20 degrees to 70 degrees to the body when viewed in plan view.

[0029] More preferably, the at least one arm of the tool is oriented at an angle between 30 degrees to 60 degrees to the body when viewed in plan view. More preferably, the at least one arm of the tool is oriented at an angle between 40 degrees to 50 degrees to the body when viewed in plan view.

[0030] Optionally, in cross-section, the at least one arm of the tool has a side surface which is oriented at a right angle to the debris accumulating surface. Optionally, this side surface is on the outlet end side of the gutter.

[0031] Optionally, in cross-section the at least one arm has a side surface which is oriented at an oblique angle to the debris accumulating surface. Optionally, this side surface is on the outlet end side of the gutter.

[0032] Having the side surface towards the outlet end side of the gutter ensures that the debris is displaced in a direction towards the outlet of the gutter. Having a right-angled side surface of the at least one arm results in the tool functioning as a right angled scraper and prevents the debris from climbing over the arm and falling into a section that is away from the outlet end side of the gutter. Having an oblique-angled side surface results in the debris purposely climbing over the oblique-angled side surface and not moving a significant distance along the guttering structure. This ensures the movement of the debris predominantly towards the outlet end side of the gutter.

[0033] Optionally, in cross-section the at least one arm has two side surfaces which are oriented at oblique angles to the debris accumulating surface. Such a tool is beneficial for installing in a guttering structure that may have a plurality of outlets for the gutter. Optionally, in cross-section the at least one arm is one of the following: triangular; right- angled triangular; or cylindrical.

[0034] Optionally, the tool comprises a plurality of arms. The plurality of arms improves the rate of debris displacement and possibilities of configurations that can be deployed in the tool.

[0035] Optionally, the tool has at least: 4, 6, 8, 10, 12 or 14 of the arms.

[0036] Optionally, the arms extend (preferably outwardly) from the same side of the body and demarcate between them a section of the debris accumulating surface. Thus the arms are spaced apart from each other.

[0037] Optionally, the spacing of two adjacent arms on one side of the tool 3 is greater than the width (in the longitudinal direction) of each of the two adjacent arms. Optionally, the ratio of the spacing to the width of each arm is at least: 2, 3, 4, 6, 8 or 10 times. Providing a relatively large space compared to the width of the arms means that more of the debris is likely to accumulate and lodge on the guttering structure rather than on the top surface of the tool 3. Therefore, more debris can be dislodged from the guttering structure using the tool 3. This is advantageous because if the debris becomes lodged on the tool 3, it is more difficult to dislodge. Optionally, this relationship of spacing and width is present for each space and its adjacent arms.

[0038] Optionally, the arms extend (preferably outwardly) from both side portions of the body when viewed in a plan view.

[0039] Optionally, a plurality of arms extends (preferably outwardly) from one side portion of the body when viewed in a plan view, and a plurality of arms extends (preferably outwardly) from the other side portion of the body when viewed in a plan view.

[0040] Optionally, the tool is arranged to occupy a volume that is substantially less compared to the space defined within the gutter.

[0041] Optionally, the input means includes a spring or weight for moving the tool back from the second position to the first position. Optionally, the input means includes a manually operable lever for moving the tool from the first position to the second position or from the second position back to the first position.

[0042] Optionally, the input means comprises a control line for moving the tool from the first position to the second position or from the second position back to the first position.

[0043] Optionally, the control line is fixed to the lever.

[0044] Optionally, the guttering structure further comprises a debris catching gutter screen on the gutter, and the tool is located on the screen.

[0045] Optionally, the tool is configured to demarcate a plurality of sections of a debris accumulating surface of the screen.

[0046] Optionally, the at least one arm of the tool is flexible so as to be adaptable to the shape of the debris accumulating surface. As the arms can adapt to the shape of the debris accumulating surface, they are able to effectively displace the debris while minimising any gaps between the arms and the debris accumulating surface through which debris may escape. More preferably, only the portion of the arm that is configured to contact the debris accumulating surface is flexible to conform to the contours of the debris accumulating surface whilst being rigid enough to displace the debris.

[0047] A second aspect of the invention provides a debris displacement system for a guttering structure comprising a debris displacement tool configured to demarcate within the tool a plurality of sections of a debris accumulating surface within the guttering structure; and input means connected to the displacement tool, for moving the tool from a first position along the guttering structure to a second position along the guttering structure and back again, wherein, movement of the debris displacement tool from the first position to the second position and back again displaces surface debris situated within the sections of the debris accumulating surface demarcated by the tool, and wherein, the input means includes a spring or weight for moving the tool back from the second position to the first position. Optionally, the input means for moving the tool between a first and second position is manually controlled using a combination of levers and / or weights. Manually operating the tool is simple and reliable whilst also being cost effective.

[0048] Optionally, the input means for moving the tool between a first and second position is controlled using an electric actuator. Using electric actuators reduces user input significantly and the tool may be used for longer periods of time without it being a physical strain on the user. Further, the electric actuator may be incorporated with a smart loT environment to automate the use of the gutter cleaner.

[0049] A third aspect of the invention provides a debris displacement system for a guttering structure comprising: optionally a guttering structure comprising a gutter; debris displacement apparatus including a plurality of debris displacement portions configured to demarcate within the apparatus and between respective debris displacement portions a plurality of sections of a debris accumulating surface within the guttering structure; and input means connected to the debris displacement portions, for moving the debris displacement portions longitudinally and / or laterally from a first position relative to the guttering structure to a second position relative to the guttering structure and back again; wherein movement of the debris displacement portions from the first position to the second position and back again displaces surface debris situated within the sections of the debris accumulating surface demarcated by the debris displacement portions. Optionally, the height of the debris displacement apparatus is less than half the internal height of the gutter.

[0050] Optionally, the length of the apparatus is more than half the internal length of the gutter excluding any gutter outlet.

[0051] Optionally, the height of the apparatus is less than 25mm.

[0052] Optionally, the debris displacement apparatus is in contact with and lies on the debris accumulating surface.

[0053] Optionally, the debris displacement apparatus comprises: a body, and at least one arm that extends from the body. Optionally, a side of the at least one arm of the apparatus is in contact with the debris accumulating surface.

[0054] Optionally, at least one of the arm and body of the apparatus is formed of a wire.

[0055] Optionally, the at least one arm of the apparatus is detachable.

[0056] Optionally, the at least one arm is oriented at a right angle to the body when viewed in plan view.

[0057] Optionally, the at least one arm is oriented at an oblique angle to the body when viewed in plan view.

[0058] Optionally, the at least one arm is angled in a direction from the first position to the second position and oriented at an angle between 5 degrees to 85 degrees to the body when viewed in plan view.

[0059] Optionally, in cross-section the at least one arm has a side surface which is oriented at a right angle to the debris accumulating surface.

[0060] Optionally, in cross-section the at least one arm has a side surface which is oriented at an oblique angle to the debris accumulating surface.

[0061] Optionally, in cross-section the at least one arm is one of the following: triangular; right- angled triangular; or cylindrical.

[0062] Optionally, the debris displacement apparatus comprises a plurality of the arms.

[0063] Optionally, the debris displacement apparatus is arranged to occupy a volume that is substantially less compared to the space defined within the gutter.

[0064] Optionally, the input means includes a spring or weight for moving the debris displacement portions back from the second position to the first position. Optionally, the input means includes a manually operable lever for moving the debris displacement portions from the first position to the second position or from the second position back to the first position.

[0065] Optionally, the input means comprises a control line for moving the debris displacement portions from the first position to the second position or from the second position back to the first position.

[0066] Optionally, the guttering structure further comprises a debris catching gutter screen on the gutter, and the apparatus is located on the screen.

[0067] Optionally, the apparatus is configured to demarcate a plurality of sections of a debris accumulating surface of the screen.

[0068] Optionally, the at least one arm of the apparatus is flexible so as to conform to the shape of the debris accumulating surface.

[0069] Optionally, at least one debris displacement portion comprises at least one rotatable arm configured to rotate about a respective rotation point on the debris accumulating surface when viewed in plan view.

[0070] Optionally, the at least one debris displacement portion comprises an axle fixed to the at least one arm.

[0071] Optionally, the control line is wrapped around the axle.

[0072] The optional features of the first, second or third aspect are equally applicable to each other aspect of the first, second and third aspect.

[0073] BRIEF DESCRIPTION OF FIGURES

[0074] Preferred embodiments of the present invention will now be described, purely by way of example, with reference to the drawings in which: Fig. 1A is a plan view of a debris displacement tool in a gutter in a first position according to a first embodiment of the present invention;

[0075] Fig. 1 B is a plan view of the debris displacement tool of Fig. 1A in the gutter in a second position;

[0076] Fig. 1C is a side view of the debris displacement tool of Fig. 1A in the gutter in the second position;

[0077] Fig. 2A is a fragmentary plan view of the debris displacement tool of Fig. 1 in the first position;

[0078] Fig. 2B is a fragmentary plan view of the debris displacement tool of Fig. 1 in the second position;

[0079] Fig. 2C is a fragmentary plan view of the debris displacement tool of Fig. 1 back in the first position;

[0080] Fig. 3A is a side view of a debris displacement tool on a gutter screen in a first position according to a second embodiment of the present invention;

[0081] Fig. 3B is a side view of the debris displacement tool of Fig. 3A on the gutter screen in a second position;

[0082] Fig. 4A is a side view of a guttering structure according to the second embodiment;

[0083] Fig. 4B is a front view of the guttering structure of Fig. 4A;

[0084] Fig. 4C is a plan view of the guttering structure of Fig. 4C;

[0085] Fig. 5A is a plan view of the debris displacement tool of Fig. 3A on the gutter screen in the first position;

[0086] Fig. 5B is a plan view of the debris displacement tool of Fig. 3A on the gutter screen in the second position; Fig. 5C is a plan view of the debris displacement tool of Fig. 3A on the gutter screen back in the first position;

[0087] Fig. 6A is a side view of a first debris displacement tool on the gutter and a second debris displacement tool on the gutter screen, each in a first position according to a third embodiment of the present invention;

[0088] Fig. 6B is a side view of the first and second debris displacement tools of Fig. 6B each in a second position;

[0089] Fig. 7 shows side views of a mechanism of weights that can be used to move the tool back from a second position to a first position;

[0090] Fig. 8 shows a front and two side views of a lever mechanism to manually actuate the movement of the tool from a first position to a second position and back to a first position;

[0091] Fig. 9 shows a plan view and a side view of a combination of a lever and a weight to actuate the movement of the tool from a first position to a second position and back to a first position according to a fourth embodiment of the present invention;

[0092] Fig. 10 shows a plan view and a side view of a combination of levers to actuate the movement of the tool from a first position to a second position and back to a first position according to a fifth embodiment of the present invention;

[0093] Figs. 11A to 11 D each show a plan view and an end view of respective other debris displacement tools with the arms having a triangular cross-section, a right-angled triangle cross-section; a circular cross-section; and a delta-wing shaped triangular cross-section;

[0094] Figs. 12A to 12D show the triangular arm of Fig. 11A moving from a first position to a second position; Figs. 13A to 13D show the right-angled triangular arm of Fig. 11B displacing debris moving from a first position to a second position and back to the first position;

[0095] Figs. 14A and 14B show plan views of a debris displacement tool with a gutter corner piece according to another embodiment of the present invention;

[0096] Fig. 15 shows a plan view of a debris displacement tool according to another embodiment of the present invention;

[0097] Fig. 16 shows a plan view of a debris displacement tool according to another embodiment of the present invention;

[0098] Fig. 17 shows a plan view, a side view and an end view of a debris displacement apparatus according to another embodiment of the present invention;

[0099] Fig. 18 shows a plan view of the debris displacement apparatus of Fig. 17 in operation.

[0100] It should be noted that the drawings are schematic and in some cases dimensions have been exaggerated.

[0101] Referring to Figs. 1A to 1 C, a debris displacement system 100 comprises: a guttering structure comprising a gutter 1 ; debris displacement apparatus in the form of a debris displacement tool 3 configured to demarcate within the tool 3 a plurality of sections of a debris accumulating surface 30 within the guttering structure; and input means 6, 8 (in the form of a torsion spring 6 and a control line 8) connected to the displacement tool 3, for moving the tool 3 from a first position along the guttering structure to a second position along the guttering structure and back again. That is to say, the tool 3 can reciprocate. In this embodiment, the debris accumulating surface 30 is the bottom inside surface 30 of the gutter 1 , but this is not essential.

[0102] Fig. 1A shows the tool 3 in the first position on the bottom surface 30 of the gutter 1 , and Fig. 1 B shows the tool 3 in the second position on the bottom surface 30 of the gutter 1. Movement of the tool 3 from the first position to the second position and back again displaces surface debris situated within the sections of the debris accumulating surface 30 demarcated by the tool 3. With the debris dislodged, rainwater, wind etc. is able to carry the debris towards the outlet end. When fixed to a building, the gutter 1 slopes towards the outlet end.

[0103] Fig. 1 C shows a side view of the tool 3 in the gutter 1. It can be seen that the height of the tool 3 is less than half the internal height of the gutter 3, and specifically is much less than half the internal height of the gutter 3. Since the tool 3 has such a small height or low profile, it provides minimal obstruction to flow of water along the gutter.

[0104] Referring to Fig. 1A again, the tool 3 has a central body or spine 25 and arms 26 which are fixed to the central spine 25 and extend laterally outwardly from the central spine 25. In this embodiment, the tool 3 has seven arms 26 extending from each side of the central spine 25, but this is not essential and the number of arms 26 can be varied as required. The arms 26 form pairs which extend outwardly from each side of the central spine 25 at same position along the spine 25.

[0105] The gutter 1 has an outlet end with an outlet 2 to which a downpipe can be attached. In plan view, the arms 26 are angled forward towards the outlet end. At an opposite end the gutter 1 has a closed end where a spring 6 is attached to the end wall of the gutter 1 . The spring 6 serves as an input means for moving the tool 3 along the gutter 1. The spring 6 is connected to one end of the tool 3 by a control line via a guide (e.g. a pulley 4) adjacent to the bottom surface 30 of the gutter 1. The pulley 4 is mounted on the side walls of the gutter 1 so that the pulley 4 does not obstruct the path of the tool 3 along the gutter 1 and the tool 3 is able to pass underneath the pulley 4.

[0106] Connected to the other end of the tool 3 is a control line 11 which extends away from the tool 3 and along the gutter 1 , over a second pulley 4 and then down and out of the outlet 2. A lever, for example, may be attached to the end of the control line 11 for pulling the control line 11 so as to move the tool 3 along the gutter 1.

[0107] Fig. 1 A shows the tool 3 in the first position where it is closer to (adjacent to) the closed end of the gutter 1.

[0108] Figs. 1B and 1C show the tool 3 moved along the gutter 1 in the direction of arrow 9 to the second position where the tool 3 is closer to (adjacent to) the outlet end. It can be seen that the upper arm of the spring 6 has moved down to the horizontal position. Any debris that has accumulated between the arms 26 is dislodged by the movement of the tool 3 and may be moved towards the outlet end by the tool 3. The arms 26 are regularly spaced along the tool 3, and, in this embodiment, the tool 3 is able to move along the gutter by at least the spacing of the arms 26, to ensure that the full length of each section demarcated in the first position is “swept”.

[0109] When the pulling on the control line 11 ceases the spring 6 pulls the tool 3 back into the first position.

[0110] With the debris dislodged, rainwater, wind etc. is able to carry the debris along the gutter 1 towards the outlet end.

[0111] It can be seen in Figs. 1A and 1B that the length L of the tool 3 is more than half the length of the gutter 1 excluding the outlet 2. This means the tool does not need to move far from the first position to the second position, which can make the tool quicker and easier to operate.

[0112] Figs. 2A-2C show how the tool 3 moves the accumulated debris.

[0113] In Fig. 2A the tool 3 is in the first position. Debris 3d has accumulated within a demarcated section 3a on the bottom surface of the gutter 1. Lines 3b mark the positions in the longitudinal direction where two adjacent pairs of arms 26 extend outwardly from the spine 25. The distance between lines 3b corresponds to the spacing of (distance between) two adjacent pairs of arms 26.

[0114] In Fig. 2B the tool 3 has moved to the second position. Since the arms 26 are angled forwards, the demarcated section becomes narrower in a backwards direction, and so the debris is funnelled together by the narrowing of the demarcated section. This means the tool 3 acts on more of the debris which helps move the debris in the forward direction. As shown in Fig. 2B, the tool 3 moves forward by more than the distance between lines 3b, which ensures that all the debris is pushed by the arms 25. 3c shows the distance by which the movement of the tool 3 exceeds the distance between lines 3b. In Fig. 2C it can be seen that, when the tool 3 moves backwards again, the debris is not funnelled together, and therefore is moved a shorter distance backwards but also laterally outwardly. Moving the debris laterally outwardly again helps position the debris so it can be readily carried away by a flow of water along the gutter 1.

[0115] Referring to Figs. 3A and 3B, according to a second embodiment of the present invention, a guttering structure comprises a debris catching gutter screen 16 on which is positioned a debris displacement tool 3. The screen 16 (which may be a wire mesh) is itself positioned on a gutter 1. The tool 3 is for displacing debris that has accumulated on the gutter screen 16. Figs. 3A and 3B show the tool 3 in the first and second positions, respectively. The configuration of the second embodiment is similar to that of the first embodiment, and only differences will be described.

[0116] The tool 3 has arms which extend at a right angle to the spine (most clearly shown in Figs. 5A-5C). The gutter screen 16 is sloped to one side (See. Fig. 4B) which would be away from the building to which the gutter 1 is attached. The spring 6 moves from a vertical position upwards to a horizontal position when the tool moves from the first position to the second position. In this embodiment, the pulleys 4 are positioned adjacent the gutter screen 16 rather than the bottom surface of the gutter 1.

[0117] Referring to Figs. 4A-4C, the gutter screen 16 has a longitudinal groove 7 in which the spine of the tool 3 can slide. Since the screen 16 slopes to one side, the groove 7 prevents the tool 3 sliding sideways off the screen 16.

[0118] Figs. 5A-5C show how the tool 3 moves the accumulated debris.

[0119] In Fig. 5A the tool 3 is in the first position. Debris 3d has accumulated within a demarcated section 3a on the gutter screen 16.

[0120] Movement of the tool 3 from the first position to the second position (as shown in Fig. 5B) moves the debris forwards along the gutter screen 16, but also laterally outwards due to the sideways slope of the screen 16.

[0121] Movement of the tool 3 back to the first position (as shown in Fig. 5C) moves the debris backwards along the gutter screen 16, but again also laterally outwards due to the sideways slope of the screen 16. Once the debris reaches the side edge of the screen 16 it can fall off the gutter screen 16 onto the ground. The arms are at a right angle rather than an oblique angle so they do not impede sideways movement of the debris.

[0122] Referring to Figs. 6A and 6B, according to a third embodiment of the present invention, the configurations of the first and second embodiments are effectively combined to provide two debris displacement tools 3, one positioned on the bottom surface of the gutter 1 and the other positioned on the gutter screen 16. Therefore, debris on both the screen 16 and the bottom surface of the gutter 1 can be displaced using the tool 3.

[0123] Fig. 7 shows an alternative input means to the spring 6 in the form of a weight 14. In this embodiment, the weight 14 is provided within a vertical tube 20. The vertical tube 20 extends through the bottom surface of the gutter 1 and is located at the closed end of the gutter 1. In this embodiment, although not shown in Fig. 7, the tool 3 is on a gutter screen 16 on top of the gutter 1. A pulley 4 is adjacent to the gutter screen 16 and directs the control line 8 which is connected to the weight 14.

[0124] Fig. 8 shows an example of lever mechanism 13 attached to a downpipe which is attached to the outlet 2 of the gutter 1. The control line 8 extends through the outlet 2 of the gutter 1 , along inside the downpipe 21 and out of a hole in the side of the downpipe 21. A pulley 4 is positioned at the edge of the hole over which the control line 8 can run. The control line is fixed to the shorter arm of a lever mechanism 13. The lever mechanism is rotatably mounted on the side of the downpipe 21. The longer arm of the lever mechanism has a handle at its free end, and preferably has weights 15 next to the handle to assist the user in rotating the lever mechanism 13. When the user rotates the lever mechanism 13 downwards from its vertical starting position the control line 8 is pulled down the downpipe 21.

[0125] Fig. 9 shows a configuration in which two downpipes 21 are provided, one at each end of the gutter 1 , and a lever mechanism 13 is provided on one of the downpipes 21 , and a weight 14 is provided in the other downpipe 21, to move the tool 3 forwards and backwards, respectively.

[0126] Fig. 10 shows a configuration which is the same as the configuration of Fig. 9 except that the weight 14 has been replaced by a second lever mechanism. Figs. 11A to 11 D show different example shapes of the arms and central spine of the tool 3. These figures show the arms having an isosceles triangular cross-section (Fig. 11 A); a right-angled triangular cross-section (Fig. 11 B); a circular cross-section (Fig. 11C); and triangular cross-section (Fig. 11 D). In Fig. 11 D the arms are also delta-wing shaped.

[0127] In Figs. 11 A, 11 B and 11 D the central spine has a semi-circular cross-section, whereas in Fig. 11C the spine has a circular cross-section.

[0128] Figs. 12A-12D show how when the arm, when viewed in cross-section, has a slope on each side surface, the debris rides up and over the arm and is not moved significantly sideways in the horizontal direction. Thus the function of the arm is more to free or dislodge the debris than to move it along the gutter.

[0129] By contrast, Figs. 13A-13D show how when the arm, when viewed in cross-section, has one vertical side surface and one sloped side surface, the debris that encounters the vertical surface is pushed along the gutter with the arm, typically in the forward direction towards the gutter outlet, whereas as the arm moves back the debris rides up the sloped surface and over the arm and is not moved significantly sideways in the horizontal direction. Thus the function of the arm is both to free the debris and move it along the gutter.

[0130] Figs. 14A and 14B show how the system can be used where the gutter has a corner section. A corner section of gutter is shown with a corner pulley 16 to allow the control line to run around the corner section. Two tools 3 are shown, one on each side of the corner pulley 16. The tools have thicker arms which are shaped in a complementary way to the corner pulley 16 so as to “sweep” substantially all of the bottom surface of the corner section of the gutter.

[0131] Figs. 15 and 16 show other forms of debris displacement tool.

[0132] In particular, Fig. 15 shows a debris displacement tool 103 according to another embodiment having a undulating shape in plan view. The tool 103 is arranged in gutter 101 and has a tool link point 112 in the form of an inclined groove by which another section of tool can be linked to provide a longer tool 103.

[0133] Fig. 16 shows a debris displacement tool 203 according to another embodiment having a zigzag shape in plan view. The tool 203 is arranged in gutter 201 and has a tool link point 212 in the form of an inclined groove by which another section of tool can be linked to provide a longer tool 203.

[0134] Figs. 17 and 18 show debris displacement apparatus according to another embodiment of the present invention.

[0135] Referring to Fig. 17, the debris displacement apparatus includes a plurality of debris displacement portions configured to demarcate within the apparatus and between respective debris displacement portions a plurality of sections of a debris accumulating surface within the guttering structure. Each debris displacement portion is in the form of a debris displacement arm of blade 326 and axle 327 fixed to the blade 326. The axle 327 is received within a hole in the gutter screen 316 and is rotatable about an axis normal to the gutter screen 316. In the side view it can be seen that the control line 308, which extends along below the gutter screen 316, is wrapped around the axle 327.

[0136] Referring to Fig. 18, it can be seen that when the control line is pulled in one direction (leftwards in Fig. 18) the blades 326 rotate in a first direction (clockwise in Fig. 18). Conversely, when the control line is pulled in the opposite direction (rightwards in Fig. 18) the blades 326 rotate in an opposite direction (anticlockwise in Fig. 18). Any debris situated within the area swept by the blades 326 will be displaced by the blades 326 and can be more easily washed off the gutter screen 316 by a flow rainwater.

[0137] In some embodiments, the arms 26 and spine 25 of the tool 3 may be formed of metal wire to give a strong and lightweight tool 3, which may also be sufficiently flexible to conform to the shape of the debris accumulating surface.

[0138] In some embodiments, the debris displacement tool may be formed from a single material or a combination of materials. The material may be selected from a group consisting of silicone, rubber, thermoplastic elastomers, polyvinyl chloride (PVC), metals, alloys and Carbon Fibre Reinforced Polymer (CFRP). The material(s) will be selected so that the tool has the desired properties to function as intended, for example the necessary flexibility and / or strength.

[0139] Embodiments of the invention include an input means in the form of a manually operable lever, but this is not essential, and, instead, an electric actuator (for example, an electric motor) may be provided for moving the tool between the first and second positions.

[0140] In embodiments of the invention a square section gutter 1 is used, but the invention is also applicable to other shapes of gutter 1 and in particular those with curved bottom surfaces such as so-called half-round gutters.

[0141] The present invention is suitable for displacing all types of debris that have accumulated on the debris accumulating surface including snow and ice.

[0142] The present invention has a number of benefits:

[0143] A first benefit is system minimalism;

[0144] Empowering natural forces to remove debris allows minimalism in design and materials which both reduces weight and the cost of installation and repair.

[0145] A second benefit is flexibility;

[0146] The system provides for single installation; sequential installation or combined installation; this enables broad calibration for varied structures and problem profiles.

[0147] The system further provides for displacement tool variation; this enables calibration for varied debris including weather derived debris such as snow and ice;

[0148] A simple displacement system also enables installation in select sections of problem guttering rather than in an entire guttering where other sections are not a problem;

[0149] A further benefit is universality; The system allows for installation in new guttering and retrofitting in old guttering and is operable in multiple gutter profiles;

[0150] A further benefit is improved screen performance;

[0151] A displacement system allows for a simpler mesh profile and a moderate screen angle both of which improve rain flow into the gutter and in turn aids natural gutter debris removal. A simpler screen is also lighter and reduces the cost of manufacture purchase and installation.

[0152] A further benefit is simple and safe low energy operation;

[0153] This enables manual or automated use by a wide demographic and eliminates both dangerous elevated gutter cleaning and costly contractors.

[0154] A further benefit is environmental;

[0155] Fewer contractors mean a reduction in road vehicles and C02 output.

[0156] According to the present disclosure:

[0157] The gutter structure surface debris displacement system may comprise gutter structure supports or reinforcements and such gutter structures may be otherwise strengthened and adapted to provide a secure passage for the control line and reduce stress on the structure by movement of the control line and tension upon it.

[0158] The surface debris displacement system may comprise support elements which reinforce or support components of a gutter structure to provide a secure passage for movement of the components of the debris system;

[0159] These elements may take the form of frames and clamps and other such means to secure the system within a gutter structure;

[0160] These elements may include units or sections of the system that can be inserted or installed or attached to a gutter structure; for example within one or more downpipes.

[0161] Such support elements and other elements or components of the system may be independent of a gutter structure and added to it; for example in a retrofitting of an existing structure; or an integrated part of an original or new gutter structure; The surface debris displacement system may comprise one or more control lines; A control line may be rigid or flexible or a combination thereof; A control line may comprise a strong and resilient material; for example one or more of a range of plastics or one or more of a range of metals or a combination thereof; in both or other examples such materials whether singular or in combination may further comprise features designed to ensure resilience and longevity of the system such as resistance to water and weathering including UV damage and extremes of temperature; A control line may comprise in whole or in part a low friction material; for example LIHMWPE or nylon or braided cord or other such material designed to allow free movement;

[0162] A control line may be arranged to pass through and along a gutter structure;

[0163] A control line may comprise linked sections;

[0164] For example to provide ease of assembly where the gutter structure is complex; or to provide for changes in direction of the control line;

[0165] Or to provide for attachment to a control line of one or more tools;

[0166] A control line may be continuous;

[0167] For example where the gutter structure is relatively simple;

[0168] A control line may comprise or be attached to and control more than one debris system component; For example where more than one debris system is installed within a gutter structure; as in a case where a gutter structure features both a gutter and a gutter covering or screen or other such protective arrangement;

[0169] Control lines operating multiple or combined or parallel systems may be arranged to run in parallel or combined or merged so as to operate as a single line;

[0170] A control line may have a first end and a second end; a first end of the control line may be anchored or connected to a reciprocating mechanism (hereafter also termed ‘return means’);

[0171] The return means may be anchored or connected to the gutter structure;

[0172] The return means may be anchored or connected to the building hosting the gutter structure or a combination thereof;

[0173] The return means may be arranged to allow the control line to travel a limited distance from a first position when tension is applied to the second end of the line;

[0174] The return means may act to return the line to a first position when tension on the second end is released or eased; The return means may vary in materials and construction;

[0175] For example to accord with the gutter structure and constraints of space;

[0176] The return means may employ stored energy or gravity;

[0177] The return means may take various forms;

[0178] The return means may comprise a spring;

[0179] The spring may be arranged to expand or stretch when tension is applied to the second end and then compress or contract when that tension is released or eased or visa versa and otherwise arranged to perform the function of providing energy to enable a return function.

[0180] The return means may comprise one or more weights;

[0181] The weight may be attached or integrated with the gutter structure or the adjacent building or a combination thereof;

[0182] Such a weight may be adjustable; Such a weight may be arranged to swivel and exert varied leverage according to position;

[0183] The weight may move vertically or at an angle to the gutter structure;

[0184] The weight may be situated within a housing;

[0185] The housing may allow the weight to move upward when tension is applied to the second end of the line and downward when that tension is released or eased or otherwise arranged to perform the function of providing energy to enable a return function.

[0186] Such a weight may be contained in a housing or conduit which is arranged to cushion the downward movement of the weight or otherwise control the speed of motion.

[0187] The return means may employ an elastomer or other such materials or mechanisms alone or in combination that provides a means to store and release energy;

[0188] The return means may be manually controlled;

[0189] For example by an operator via a lever or other such mechanism; A second end of the control line may be arranged to allow tension or other motion force to be applied to it;

[0190] Such force may act to move the second end of the control line a limited distance; This movement may act to engage the return means at the first end of the line;

[0191] The applied force may be manual;

[0192] The applied force may include the use of leverage;

[0193] For example by way of a lever operated by a person;

[0194] The applied force may include a mechanism or system of adjustable weights; For example weights which may be adjusted to assist leverage;

[0195] The applied force may be automated or semi-automated;

[0196] For example powered by electricity in the form of mains connection or battery or solar energy or any combination thereof;

[0197] For example powered by a system that uses the collected weight of rainwater to move the line in one direction while the release of that water allows the return means to move the line back;

[0198] Such systems enabling timed movement or movement based upon events such as seasons or rainfall or other weather events;

[0199] A second end of the control line may be arranged to exert a measured counter pressure to the return means;

[0200] Such an arrangement may assist in movement of the return means; for example if the movement was activated manually so as to reduce the physical strength required;

[0201] This counter pressure may take the form of a weighted lever or link or similar contact point; Such a counter pressure may be arranged to be in abeyance until engaged;

[0202] Such abeyance may be arranged so as to reduce stress upon the control line when not in use; or to ensure tension or pressure upon a control line is not continual;

[0203] Such a counter pressure may act to reduce the applied force necessary to engage the return means.

[0204] The control line and attached or integral tools and other moving parts may have guides to control direction of movement; Guides and any associated components may be integral to a gutter structure or attached or inserted.

[0205] A guide or guides may be supported by a frame or clamps or other such elements and components to provide stability and resistance to adverse movement and stress;

[0206] Guides may comprise varying forms depending on their position and purpose within a gutter structure in which the control line operates; For example guides may comprise runners; guides may comprise wheels or rollers; guides may be positioned to change the direction of the control line; For example to guide it around corners; Such guides may be attachable to the gutter structure; Such guides may be attachable to the building where the gutter structure is installed;

[0207] A guide may comprise a conduit;

[0208] Conduits and any associated components may be integral to a gutter structure or attached or inserted.

[0209] A conduit may be full or partial; For example the conduit may envelope the control line; The conduit may form a channel within which the control line runs;

[0210] A conduit may be flexible; for example to allow the control line to conform to a curve in the downpipe;

[0211] A conduit may be rigid; for example to protect the control line from debris; or to ensure a stable motion;

[0212] A conduit may be both flexible and rigid in different sections;

[0213] A conduit may comprise a material or structure that lubricates the movement of a control line;

[0214] A conduit may comprise a frame attachable to or integral to a gutter structure to house the conduit; The frame may be arranged to provide for the passage of rainwater into the gutter structure;

[0215] The conduit may comprise a means to facilitate line motion and reduce friction on the line; For example micro rollers or low friction material; for example material in the form of a sleeve. The surface debris displacement system may comprise one or more debris displacement tools; (hereafter the term ‘tool’ in the singular may be also read as in the plural and vice versa)

[0216] Such tools may comprise a single material or a combination of materials; For example the tool may be metal or plastic formed from a composite or formed from a combination of such materials; The tool may be flexible in whole or in part;

[0217] Such tools may be attached to or be integral with or connected to one or more control lines; or a combination thereof; The tool may be arranged to move substantially in two or more directions in accordance with the movement of the control line;

[0218] The tool may be arranged to lie closely and substantially in contact on a surface within a gutter structure;

[0219] The tool may be arranged to engage adjacent debris when moved;

[0220] Such engagement may be designed to displace such debris from its position on the surface;

[0221] The tool may comprise a single unit;

[0222] The tool may comprise an array of members;

[0223] The members may be spaced to varied degree;

[0224] For example arranged in close proximity in one section of system and spaced differently in a different section of the system;

[0225] The members may be arranged to extend across one or more surfaces of the gutter structure;

[0226] The tool may be arranged to move adjacent debris in a first direction more than a second direction;

[0227] For example a tool comprising members may be angled such that movement in one direction captures or urges debris across the surface; and movement in a second direction displaces debris in a more lateral direction or have less effect on its physical movement;

[0228] Tool angles and configuration may be arranged to allow tool movement to urge displaced debris in a direction advantageous to removal from the gutter structure. For example to primarily urge debris toward the downward slope of a gutter structure surface;

[0229] Tool movement and tool dimensions may be calibrated to ensure maximum debris demarcated by the tool is displaced.

[0230] A tool profile may be optimised to ensure minimal obstruction to debris movement within the gutter structure by natural forces;

[0231] For example to minimise obstruction of the movement of debris across or along a gutter structure surface when rain water or wind is assisting or acting upon the movement of such debris;

[0232] The tool may be flexible or rigid or a combination thereof;

[0233] Relative flexibility or rigidity may depend upon the surface and nature of the primary debris with which it may engage;

[0234] The tool may vary in configuration according to the primary debris to be engaged; For example when engaging primarily fine debris the tool may comprise light and fine members;

[0235] And when engaging primarily with large or more resistant debris the tool may comprise heavier and stronger members; For example where snow and ice are common the tool may be strongly arranged to engage and displace snow and ice;

[0236] The system may include multiple varied forms of tool;

[0237] For example in a dual system a tool which displaces debris upon a gutter screen may differ from a tool that displaces debris from the surface of a gutter;

[0238] The tool may be a single unit or comprised of units linked together; For example the tool may comprise linked units to enable movement along a surface having multiple sections which change direction;

[0239] Preferred embodiments of the invention have been described purely by way of example, and various modifications, additions and / or omissions will present themselves to one skilled in the art, all of which form part of the invention. The present application discloses the subject matter defined in the following clauses:

[0240] 1. A debris displacement system for a guttering structure comprising: a guttering structure comprising a gutter; a debris displacement tool configured to demarcate within the tool a plurality of sections of a debris accumulating surface within the guttering structure; and input means connected to the displacement tool, for moving the tool from a first position along the guttering structure to a second position along the guttering structure and back again; wherein movement of the debris displacement tool from the first position to the second position and back again displaces surface debris situated within the sections of the debris accumulating surface demarcated by the tool; and wherein the height of the tool is less than half the internal height of the gutter.

[0241] 2. A debris displacement system according to clause 1 , wherein: the length of the tool is more than half the internal length of the gutter excluding any gutter outlet.

[0242] 3. A debris displacement system according to clause 1 or 2, wherein: the height of the tool is less than 25mm.

[0243] 4. A debris displacement system according to any preceding clause, wherein: the debris displacement tool is in contact with and lies on the debris accumulating surface.

[0244] 5. A debris displacement system according to any preceding clause, wherein: the debris displacement tool comprises: a central body, and at least one arm that extends outwardly from the central body.

[0245] 6. A debris displacement system according to clause 5, wherein: a side of the at least one arm of the tool is in contact with the debris accumulating surface. 7. A debris displacement system according to clause 5 or 6, wherein: at least one of the arm and central body of the tool is formed of a wire.

[0246] 8. A debris displacement system according to clause 5, 6 or 7, wherein: the at least one arm of the tool is detachable.

[0247] 9. A debris displacement system according to any one of clauses 5 to 8, wherein: the at least one arm is oriented at a right angle to the central body when viewed in plan view.

[0248] 10. A debris displacement system according to any one of clauses 5 to 8, wherein: the at least one arm is oriented at an oblique angle to the central body when viewed in plan view.

[0249] 11. A debris displacement system according to clause 10, wherein: the at least one arm is angled in a forward facing way and oriented at an angle between 5 degrees to 85 degrees to the central body when viewed in plan view.

[0250] 12. A debris displacement system according to any one of clauses 5 to 11, wherein: in cross-section the at least one arm has a side surface which is oriented at a right angle to the debris accumulating surface.

[0251] 13. A debris displacement system according to any one of clauses 5 to 12, wherein: in cross-section the at least one arm has a side surface which is oriented at an oblique angle to the debris accumulating surface.

[0252] 14. A debris displacement system according to any one of clauses 5 to 13, wherein: in cross-section the at least one arm is one of the following: triangular; right- angled triangular; or cylindrical.

[0253] 15. A debris displacement system according to any one of clauses 7 to 14, wherein: the debris displacement tool comprises a plurality of the arms.

[0254] 16. A debris displacement system according to any preceding clause, wherein: the debris displacement tool is arranged to occupy a volume that is substantially less compared to the space defined within the gutter.

[0255] 17. A debris displacement system according to any preceding clause, wherein: the input means includes a spring or weight for moving the tool back from the second position to the first position.

[0256] 18. A debris displacement tool according to any preceding clause, wherein: the input means includes a manually operable lever for moving the tool from the first position to the second position or from the second position back to the first position.

[0257] 19. A debris displacement system according to any preceding clause, wherein: the input means comprises a control line for moving the tool from the first position to the second position or from the second position back to the first position.

[0258] 20. A debris displacement system according to any preceding clause, wherein: the guttering structure further comprises a debris catching gutter screen on the gutter, and the tool is located on the screen.

[0259] 21. A debris displacement system according to clause 20, wherein the tool is configured to demarcate a plurality of sections of a debris accumulating surface of the screen.

[0260] 22. A debris displacement system according to any preceding clause, wherein: the at least one arm of the tool is flexible so as to conform to the shape of the debris accumulating surface.

[0261] 23. A debris displacement system for a guttering structure comprising: a debris displacement tool configured to demarcate within the tool a plurality of sections of a debris accumulating surface within the guttering structure; and input means connected to the displacement tool, for moving the tool from a first position along the guttering structure to a second position along the guttering structure and back again; wherein movement of the debris displacement tool from the first position to the second position and back again displaces surface debris situated within the sections of the debris accumulating surface demarcated by the tool; and wherein the input means includes a spring or weight for moving the tool back from the second position to the first position.

[0262] 24. A debris displacement system according to clause 23, wherein: the input means for moving the tool between a first and second position is controlled using an electric actuator.

Claims

CLAIMS:

1. A debris displacement system for a guttering structure comprising: a guttering structure comprising a gutter; a debris displacement tool configured to demarcate within the tool a plurality of sections of a debris accumulating surface within the guttering structure; and input means connected to the debris displacement tool, for moving the tool longitudinally and / or laterally relative to the guttering structure from a first position relative to the guttering structure to a second position relative to the guttering structure and back again; wherein movement of the debris displacement tool from the first position to the second position and back again displaces surface debris situated within the sections of the debris accumulating surface demarcated by the tool; and wherein the height of the tool is less than half the internal height of the gutter.

2. A debris displacement system according to claim 1, wherein: the length of the tool is more than half the internal length of the gutter excluding any gutter outlet.

3. A debris displacement system according to claim 1 or 2, wherein: the height of the tool is less than 25mm.

4. A debris displacement system according to any preceding claim, wherein: the debris displacement tool is in contact with and lies on the debris accumulating surface.

5. A debris displacement system according to any preceding claim, wherein: the debris displacement tool comprises: a body, and at least one arm that extends from the body.

6. A debris displacement system according to claim 5, wherein: a side of the at least one arm of the tool is in contact with the debris accumulating surface.

7. A debris displacement system according to claim 5 or 6, wherein: at least one of the arm and body of the tool is formed of a wire.

8. A debris displacement system according to claim 5, 6 or 7, wherein: the at least one arm of the tool is detachable.

9. A debris displacement system according to any one of claims 5 to 8, wherein: the at least one arm is oriented at a right angle to the body when viewed in plan view.

10. A debris displacement system according to any one of claims 5 to 8, wherein: the at least one arm is oriented at an oblique angle to the body when viewed in plan view.

11. A debris displacement system according to claim 10, wherein: the at least one arm is angled in a direction from the first position to the second position and oriented at an angle between 5 degrees to 85 degrees to the body when viewed in plan view.

12. A debris displacement system according to any one of claims 5 to 11 , wherein: in cross-section the at least one arm has a side surface which is oriented at a right angle to the debris accumulating surface.

13. A debris displacement system according to any one of claims 5 to 12, wherein: in cross-section the at least one arm has a side surface which is oriented at an oblique angle to the debris accumulating surface.

14. A debris displacement system according to any one of claims 5 to 13, wherein: in cross-section the at least one arm is one of the following: triangular; right- angled triangular; or cylindrical.

15. A debris displacement system according to any one of claims 7 to 14, wherein: the debris displacement tool comprises a plurality of the arms.

16. A debris displacement system according to any preceding claim, wherein:the debris displacement tool is arranged to occupy a volume that is substantially less compared to the space defined within the gutter.

17. A debris displacement system according to any preceding claim, wherein: the input means includes a spring or weight for moving the tool back from the second position to the first position.

18. A debris displacement tool according to any preceding claim, wherein: the input means includes a manually operable lever for moving the tool from the first position to the second position or from the second position back to the first position.

19. A debris displacement system according to any preceding claim, wherein: the input means comprises a control line for moving the tool from the first position to the second position or from the second position back to the first position.

20. A debris displacement system according to any preceding claim, wherein: the guttering structure further comprises a debris catching gutter screen on the gutter, and the tool is located on the screen.

21. A debris displacement system according to claim 20, wherein the tool is configured to demarcate a plurality of sections of a debris accumulating surface of the screen.

22. A debris displacement system according to claim 5 or any claim dependent on claim 5, wherein: the at least one arm of the tool is flexible so as to conform to the shape of the debris accumulating surface.

23. A debris displacement system according to any preceding claim, wherein: the input means for moving the tool between a first and second position is controlled using an electric actuator.

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