GB2603438A

GB2603438A - Gutter and roof cleaning apparatus

Info

Publication number: GB2603438A
Application number: GB2206517.1A
Authority: GB
Inventors: Barrons Bruce
Original assignee: Airpole Ltd
Current assignee: Airpole Ltd
Priority date: 2018-02-05
Filing date: 2018-02-05
Publication date: 2022-08-03
Anticipated expiration: 2038-02-05
Also published as: GB202206517D0; GB2603438B

Abstract

A roof cleaning apparatus has a compressor lance and head 1400. The head comprises a chassis supporting a fluid outlet. The chassis has a foot in the form of a ski 1402, 1404 which engages the roof surface and supports the fluid outlet to direct fluid flow at the roof surface. The chassis may comprise two spaced skis so as to form a sled. The outlet may be pivotally supported on a crossmember 1406 extending between the two skis to allow it to be aimed.

Description

Gutter and roof cleaning apparatus The present invention is concerned with a gutter and roof cleaning apparatus. More specifically, the present invention is concerned with a gutter and roof cleaning apparatus which uses pressurised fluid to agitate and remove debris which is trapped inside a gutter or on a roof.

Domestic and commercial gutters are frequently blocked and require regular clearing. Traditionally, this is carried out by hand by a person on a ladder or scaffolding. These solutions have cost, time and safety implications.

More recently, systems have been introduced which can clean gutters from the ground. The user will be based at ground level with a ground unit, and a long pole will extend to the gutter where the clearing takes place.

The Skyvac (TM) system utilises a ground based vacuum unit and a long tube which is held by a user to reach a gutter. At the end of the tube there is positioned a soft, deformable "U" shaped joint which attaches to a downwardly depending short tube section. An opening at the end of the short tube section allows debris to be either sucked into and down the tube (acting like a vacuum cleaner) or held on the end of the tube for removal (acting like a suction clamp). The Skyvac (TM) system also offers a "blow" function in which air is fed to the end of the tube to clean light and loose debris from the gutter.

Because the diameter of the tube opening needs to be large (for vacuum purposes), the air speed in "blow" mode is relatively low, and incapable of dislodging more firmly stuck debris. It is better suited to dislodging lightweight, loose debris such as leaves. Further, the diameter of tube required to remove debris by suction makes the system quite large and bulky. Also, the tube can become blocked.

US 2008/0104780 Al discloses a gutter cleaning system which uses a ground based unit to mechanically drive an impeller at the end of a long pole. U5'780 discloses the use of an air hose to remove debris loosened by the impeller at the end of the pole. It also discloses the use of a camera.

A problem with this system is that mechanical drive needs to be transferred to the impeller. This makes the system heavy and complex. The use of an impeller can also cause damage to the gutter system. The impeller can also be jammed.

It will also be noted that stubborn debris can grow and collect on roofs-particularly tiled roofs.

What is required is a gutter and roof cleaning apparatus which is compact, lightweight and capable of targeting areas of stubborn debris.

According to a first aspect of the invention there is provided downpipe cleaning apparatus for cleaning gutter downpipes, the apparatus comprising: a generally tubular body having: a central fluid channel extending along a main axis; a sidewall surrounding the central fluid channel; a first end for attachment to a fluid supply; and, a second, free end; and, a plurality of outlets defined in the sidewall and in fluid communication with the central fluid channel to direct fluid therein radially outwardly of the main axis.

Advantageously this allows the body to be easily inserted into a downpipe and to "back clear" the debris, avoiding further compaction in the pipe.

Preferably at least some of the fluid outlets are arranged to direct fluid in a direction having both radial and axial components.

Preferably at least some of the fluid outlets are arranged to direct fluid towards the first end of the body.

The second end of the body may be closed.

Preferably the apparatus comprises an elongate flexible section of fluid conduit which attached to the first end of the body.

Preferably the apparatus comprises a threaded joint portion at the first end of the body.

The invention also provides a gutter cleaning apparatus comprising: a first portion for attachment to a lance; a second portion for downward insertion into a gutter defining a second portion axis; and, a downpipe cleaning apparatus according to the first aspect attached to the second portion; in which the first portion and the second portion are relatively rotatable about a first axis.

Preferably the first portion and second portion define a continuous central fluid channel in fluid communication with the body of the downpipe cleaning apparatus.

According to a second aspect of the invention there is provided a cleaning apparatus head for cleaning gutters comprising: a first fluid outlet for cleaning a gutter; a camera directed towards the first fluid outlet; a second fluid outlet directed at the camera.

Advantageously, this allows the camera to be cleaned / kept free of debris in a compact and efficient manner.

Preferably the second fluid outlet is fed from a fluid source common with the first fluid outlet. Preferably the apparatus comprises a valve to remotely control fluid flow from the second fluid outlet.

The valve can be remotely controlled during use of the cleaning apparatus head.

The invention also provides a gutter cleaning apparatus comprising: a lance; and, a cleaning apparatus head according to the second aspect.

According to a third aspect of the invention there is provided a cleaning apparatus head for cleaning gutters, the cleaning apparatus head comprising: a first portion for attachment to a lance; a second portion for downward insertion into a gutter defining a second portion axis; a fluid outlet attached to the second portion and arranged to direct a fluid at a non-zero angle to the second portion axis; and, an actuator; in which the first portion and the second portion are relatively rotatable about a first axis by the actuator, and the fluid outlet is rotatable about the second portion axis.

Preferably a fluid outlet angle defined relative to the second portion axis is between 80 and 175 degrees, preferably 90 degrees.

Preferably the fluid outlet is defined at a free end of an elbow-shaped body having a first leg oriented to the second portion axis and a second leg oriented at the fluid outlet angle to the second portion axis.

Preferably the body is rotatable about the second portion axis relative to the second portion. Preferably the second portion and the body are connected by a rotatable joint.

Preferably the joint comprises a concentric fluid passage for passage of fluid to the fluid outlet. Preferably the actuator can be remotely controlled during use of the cleaning apparatus head.

Preferably the first portion and the second portion are relatively rotatable via a joint.

Preferably the first portion defines a first portion axis, the second portion defines a second portion axis, and the joint is oriented to change the angle between the first and second portion axes.

Preferably the joint axis is perpendicular to the first and second portion axes. Preferably the apparatus comprises a camera directed towards the fluid outlet.

Preferably the apparatus comprises a further fluid outlet directed at the camera.

Preferably the further fluid outlet is fed from a fluid source common with the fluid outlet. Preferably the apparatus comprises a valve to remotely control fluid flow from the further fluid outlet. Preferably the valve can be remotely controlled during use of the cleaning apparatus head. Preferably the body is removably attached to the second portion.

According to a fourth aspect of the invention there is provided a cleaning apparatus head for cleaning gutters, the cleaning apparatus head comprising: a first portion for attachment to a lance; a second portion for downward insertion into a gutter defining a second portion axis; and, a fluid outlet attached to the second portion and arranged to direct a fluid at a non-zero angle to the second portion axis; in which the fluid outlet is rotatable about the second portion axis.

The second portion is at an angle to the first portion. Advantageously, the invention allows a high pressure jet of fluid (preferably above 7 bar) to be directed to specific areas within the gutter, facilitating removal of areas of stubborn debris. The use of an angled outlet provides cleaning for the sides of the gutter, and also allows material to be blown along the main gutter axis, thus pushing it out of the gutter end.

A fluid outlet angle is defined such that a zero fluid outlet angle is parallel to the axis, and towards the first portion. A 180 degree fluid outlet angle is parallel to the axis and away from the first portion. Preferably the fluid outlet angle is between 80 and 180 degrees, and more preferably the fluid outlet angle is 90 degrees. Preferably the fluid outlet is configured such that fluid flow is asymmetric about the second portion axis-i.e. fluid is concentrated in one direction.

Preferably the fluid outlet is defined on a nozzle. This accelerates the fluid (preferably compressed gas, more preferably air) towards the debris, allowing it to be dislodged. Preferably the total outlet area from the nozzle is 1 to 6 mm2 at a pressure of 5-10bar.

Preferably the fluid outlet is defined at a free end of an elbow-shaped body having a first leg oriented to the second portion axis and a second leg oriented at the fluid outlet angle to the second portion axis. Preferably the body is rotatable about the second portion axis relative to the second portion to direct the fluid flow.

Preferably the second portion and the body are connected by a rotatable joint. Preferably the joint comprises a concentric fluid passage for passage of fluid to the fluid outlet. This provides a highly compact arrangement for entry into small gutter openings.

Preferably the rotation of the outlet is automated-specifically an actuator may be arranged to rotate the fluid outlet about the second portion axis. Preferably the actuator can be remotely controlled during use of the cleaning apparatus head from the ground end of the lance.

Preferably the first portion and the second portion of the head are relatively rotatable via a joint. In this case, the first portion defines a first portion axis, the second portion defines a second portion axis, and the joint is oriented to change the angle between the first and second portion axes. Preferably the joint axis is perpendicular to the first and second portion axes (which are coplanar).

Preferably the joint actuation is automated. An actuator may be arranged to actuate the joint to relatively move the first and second portions. This allows a variable angle of entry into the gutter opening, and when combined with the rotatable nozzle allows greater control of the region being cleaned. Preferably the actuator can be remotely controlled from ground level during use of the cleaning apparatus head.

Preferably there is provided a camera directed towards the fluid outlet, allowing the user to monitor the cleaning activity via a remote monitor from the ground. Preferably there is provided a further fluid outlet directed at the camera. This allows the camera lens to be cleaned with high pressure fluid.

Preferably the further fluid outlet is fed from a fluid source common with the fluid outlet. This is an efficient and compact arrangement.

Optionally, a valve may be provided to remotely control fluid flow from the further fluid outlet, and thus only clean the camera when required. Preferably the valve can be remotely controlled during use of the cleaning apparatus head.

The nozzle body may be removably attached to the second portion, thus allowing replacement with other types of nozzles in a kit! modular form. According to a fifth aspect there is provided a kit for gutter cleaning comprising: a cleaning apparatus head having an angled nozzle according to the first aspect; and, a downpipe cleaning body being substantially straight and having at least one fluid outlet at an angle to the second portion axis; in which the downpipe cleaning body can be assembled with the head in place of the elbow-shaped body.

The invention also provides a kit comprising a remotely actuated grabber which can be assembled in place of the downpipe cleaning body or angled nozzle.

According to the invention there is provided a cleaning apparatus for cleaning gutters comprising: a lance; and, a cleaning apparatus head according to the fourth aspect.

Preferably a pressurised fluid source and a fluid conduit extending to the fluid outlet is provided.

Preferably the pressurised fluid source comprises an air compressor.

A pressurised liquid source may be provided in fluid communication with the fluid conduit, to allow water and! or chemicals to be introduced. Preferably a junction (such as a T-or Y-piece) is provided in which pressurised air from the air compressor and the pressurised liquid are mixed before reaching the fluid outlet.

According to a sixth aspect of the invention there is provided a roof cleaning apparatus head comprising: a chassis having a roof-contacting element; and, a fluid outlet attached to the chassis and configured to be directed at a roof surface contacted by the roof-contacting element in use.

The element may be a rolling element such as a wheel, or a sliding element having a sliding face such as a ski.

Advantageously, this allows a roof to be cleaned by rolling or sliding the wheeled head up and down the roof surface whilst projecting fluid from the outlet.

Preferably the fluid outlet is rotatable to vary an angle of impingement on the roof. This may be by a remote controlled actuator. The axis of rotation of the fluid outlet may be parallel to the wheel axis.

The invention also provides a cleaning apparatus comprising a lance and a roof cleaning apparatus head according to the fourth aspect.

Preferably the pressurised fluid source comprises an air compressor.

According to a seventh aspect of the invention there is provided cleaning apparatus head for cleaning gutters, the cleaning apparatus head comprising: a first portion for attachment to a lance; a second portion for downward insertion into a gutter; and, a grabber attached to the second portion, the grabber configured to grab items in the gutter.

Preferably the grabber comprises a plurality of remotely controlled arms or fingers which can be actuated to grab items in the gutter. Preferably a camera is directed towards the target area of the grabber.

Various examples of cleaning apparatuses falling within the scope of the present invention will now be described with reference to the accompanying Figures in which: Figure la is a schematic front view of a first gutter cleaning apparatus in accordance with the present invention; Figure lb is a schematic side view of the gutter cleaning apparatus of Figure la; Figure 2 is a detail view of a part of the gutter cleaning apparatus of Figure la; Figure 3a is a further detail view of a part of the gutter cleaning apparatus of Figure la; Figures 3b to 3e are detail views per Figure 3a with the apparatus in different configurations; Figure 4 is a detail view of a part of a second gutter cleaning apparatus in accordance with the present invention; Figure 5 is a detail view of a part of a third gutter cleaning apparatus in accordance with the present invention; Figure 6 is a detail view of a part of a fourth gutter cleaning apparatus in accordance with the present invention; Figure 7 is a detail view of a part of a fifth gutter cleaning apparatus in accordance with the present invention; Figure 7a is a detail view of a part of the apparatus of Figure 7; and, Figure 8a is a schematic side view of a sixth gutter cleaning apparatus; Figure 8b is a detail view of a part of the gutter cleaning apparatus of Figure 8a in region B; Figure 9a us a schematic side view of a first roof cleaning apparatus according to the invention; Figures 9b and 9c are detail views of the roof cleaning apparatus of Figure 9a; Figure 10 shows a second roof cleaning apparatus according to the invention; Figure 11 shows a seventh gutter cleaning apparatus according to the invention; Figure 12 shows part of an eighth gutter cleaning apparatus according to the invention; Figure 13 shows part of a ninth gutter cleaning apparatus according to the invention; Figure 13a shows an alternative nozzle configuration for the apparatus of Figure 13; Figure 14 shows a part of a tenth gutter cleaning apparatus according to the invention; Figure 15 shows an exploded view of part of an eleventh gutter cleaning apparatus according to the invention; Figures 16a to 18b are detailed views of parts of the apparatus of Figure 14; Figures 19a and 19b are detailed views of a further part of the apparatus of Figure 14; Figure 20 is a detailed view of a still further part of the apparatus of Figure 14; Figures 21 and 22 are views of a third roof cleaning apparatus according to the invention; Figure 23 is a view of an alternative part arrangement to Figure 18a; Figure 24 is a view of a further alternative part arrangement to Figure 18a; Figure 25a is a perspective view of an alternative design to the part of Figure 20; Figure 25b is a perspective view of a further alternative design to the part of Figure 20; Figures 26 and 27 are perspective views of a part of a twelfth gutter cleaning apparatus according to the invention; and, Figures 28 and 29 are perspective views of further parts of the twelfth gutter cleaning apparatus according to the invention.

Referring to Figures la and lb, a schematic system view of a gutter cleaning apparatus 100 is shown.

The apparatus 100 generally comprises a compressor 102, a hollow lance 104 and head 106. The apparatus 100 is provided for cleaning a rain gutter 12 attached to a building 10 having a roof 14 (Figure lb) positioned to allow the flow of rainwater therefrom into the gutter 12.

The compressor 102 is a powered air compressor which in this embodiment generates 7 bar (7kPa) air pressure. The compressor acts on ambient air and provides compressed air to a supply hose 108 which extends through the hollow lance 104 towards the head 106 as will be described below. The compressor will not be described in detail here, as it will be understood that compressors of this type are easily obtained by one skilled in the art.

The lance 104 is telescopic and comprises a first section 110, a second section 112 and an end section 114. The sections 110, 112 are straight sections of carbon fibre tube (other materials such as glass fibre are envisaged).

Referring to Figure 2, the end section 114 is different to the first and second sections 110, 112. The end section 114 comprises a straight first portion 116 and a straight second portion 118 joined by a curved portion 120 defining an internal angle A = 130 degrees to provide a "goose-neck" section. As such, the second portion 118 projects at an angle of 130 degrees to the first section.

The first portion 116 of the end section 114 is attached to the second section such that when the rest of the lance is held vertical (i.e. the first and second sections 110, 112), the second portion 118 of the end section 114 is at an oblique upward angle such that it can extend over the top of the gutter 12.

The head 106 is shown in more detail in Figure 3a. It comprises a first portion 120, a second portion 122 and a nozzle assembly 124.

The first portion 120 comprises a tubular section of pipe 126 having a main axis X and a fastener 128 for attachment to the lance 104 at a first end. At a second end, the first portion is connected to a rotatable joint 130. The joint 130 has a first part 132 and a second part 134 which are relatively rotatable about axis Z. The first part 132 of the joint 130 is assembled to the first portion 120 of the head 106 such that the joint axis Z is perpendicular to the main axis X. The first portion 120 further comprises a collar 134 which is attached to an adjustable camera mount 136. A camera 138 is attached to the camera mount 136 such that it extends past the joint 130. The camera 138 has a battery and wireless transmitter configured to transmit images via a wireless signal 139 to a visual display unit at ground level.

The visual display unit is not shown, but in this embodiment includes a wireless battery-powered unit having a screen. The unit can be attached to a user's glove to enable the user to view the live feed from the camera and clear the gutter appropriately. The unit is attached to the user's glove by e.g. a hook and loop fastening system and is attachable to the glove rear (back of the hand) to enable the screen to be viewed when the user grips the lance.

The second portion 122 comprises a tubular section of pipe 140 having a main axis Y. The second portion 122 is attached to the second part 134 of the joint 130. As such the relative angle B between the first portion 120 and second portion 122 can be adjusted by manipulation of the joint 130 between (in this example) 50 to 180 degrees. In general use, as shown in Figure 3a, the second portion 122 will depend downwards-in other words the lance 104 and head 106 form a "U" shape such that the head 106 can be lowered into the top of a gutter 12.

The nozzle assembly 124 comprises a fluid pipe 142 extending coaxially from the second portion 122 of the head 106. The fluid pipe has an inlet (not shown) to which the end of the hose 108 is attached such that pressurised air is fed to the pipe 142.The pipe 142 terminates in a joint 144 to which a nozzle body 146 attaches. The nozzle body 146 comprises a 90 degree elbow pipe section 148 which at its free end has a converging flow restriction or nozzle 150 having a fluid outlet for the ejection of high pressure air. The total nozzle outlet area is 3 mm2 (although it may range from 1 to 6 mm2). The 90 degree elbow section provides a fluid outlet angle C (Figure 3a) of 90 degrees. The joint 144 (which in this instance is a simple bearing joint) means that the body 146 can be rotated about the axis Y, which changes the direction of flow of high pressure air from the outlet. The nozzle body 146 can be rotated through 360 degrees by the user to achieve the desired result.

As shown in Figure 3a, the camera 138 is directed with a field of vision FV including the gutter 12 and the nozzle body 146.

In use, the user holds the lance 104 such that the nozzle body 146 is positioned within the gutter 12. The compressor 102 is turned on, and compressed air travels through the hose 108 to the nozzle body 146 where it is ejected at high speed to agitate and remove debris from the gutter. The user can view his progress and manipulate the nozzle body 146 using visual feedback from the camera 138.

The ability to adjust the angle B through manipulation of the joint 130 and the provision of the joint 144 to rotate the nozzle body 146 allows for an articulate cleaning apparatus which can be used to remove stubborn debris in hard to access locations.

Referring to Figure 3b, the joint 144 has been manipulated such that the nozzle body 146 has been rotated by 180 degrees about the axis Y. This position (like the position of Figure 3a) is useful for dislodging stubborn debris attached to the walls of the gutter 12. In the position of Figure 3c, the nozzle has been rotated such that it faces along the gutter. This is beneficial for general removal of loose debris which can be pushed from the gutter end.

In Figure 3d, the joint 130 has been manipulated to reduce the angle B from 90 degrees. This allows the axis Y to point more directly downwards, which in turn allows the nozzle body 146 (and specifically the fluid outlet) to be directed more horizontally at the gutter walls.

In Figure 3e, the roof 14 overhangs the gutter significantly, and as such a shallower angle B is more appropriate. Rotation of the nozzle body 146 permits cleaning under the roof 14.

Referring to Figure 4, part of a gutter cleaning apparatus 200 is shown which is similar to the gutter cleaning apparatus 100 (similar features are designated by like reference numerals).

In the apparatus 200, the joint 130 is driven by an electric motor 202 which is powered by a power! signal cable 204 operated at ground level by a switch. Therefore manipulation of the angle B can be undertaken remotely with the nozzle body 146 in the gutter 12. It will be noted that because the camera 138 is attached to the first portion 120 of the head 106 (i.e. on the lance side of the joint 130), the motor does not need to be powerful enough to move it.

Further, in the apparatus 200, the joint 144 is driven by an electric motor 206 which is powered by a power / signal cable 208 operated at ground level by a switch. Therefore rotation of the angle of the nozzle body 146 about the axis Y can be undertaken remotely with the nozzle body 146 in the gutter 12.

Both of these features allow the user to remotely manipulate the head 106 without needing to bring it down from the gutter to ground level.

Turning to Figure 5, part of a gutter cleaning apparatus 300 is shown which is similar to the gutter cleaning apparatus 100 (similar features are designated by like reference numerals).

The high pressure air hose 108 is shown extending to a T-piece 302 proximate the second portion 122 of the head 106. The T piece has a first hose sub-section 304 extending to the nozzle body 146 in the manner described above. The T-piece is also in fluid communication with a second hose sub-section 306 extending to a further nozzle 308 which is directed towards the camera 138. As such, when in operation, a first jet of air ii extends from the nozzle body 146 into the gutter for cleaning purposes, and a second jet J2 extends from the further nozzle 308 towards the front, or lens, of the camera 138. In this way, it is far less likely that loose debris and dirty liquid will adhere to the camera, otherwise obscuring vision. The further nozzle 308 effectively cleans the camera 138.

Turning to Figure 6, a gutter cleaning apparatus 400 is identical to the apparatus 300 with the exception that air flow into the further nozzle 308 is controlled by a valve 402. The valve 402 may be opened and closed by a power / signal line 404 which is connected to a control or switch at the user's end of the lance 104. Therefore, when the user notices that the camera 138 is particularly dirty (as the field of vision is obscured), he or she can open the valve 402 to clean the lens of the camera 138.

Turning to Figure 7, a gutter cleaning apparatus 500 is identical to the gutter cleaning apparatus 100 with the exception that the elbow-shaped nozzle body 146 has been replaced with a downpipe cleaning nozzle body 502. The downpipe cleaning nozzle 502 comprises a straight pipe section 504 extending along the axis V (giving a nozzle angle C of 180 degrees) which at its free end has a converging flow restriction 506 having a plurality of circumferentially spaced and radially directed openings 508 for the ejection of high pressure air. There is also provided an axially directed opening 509 for cleaning along the axis of a downpipe. The nozzle 502 is attached to the joint 144 such that high pressure air from the hose (not shown) is fed to the nozzle 502 and exits at the openings 508, 509.

As such, the downipe cleaning nozzle 502 can be inserted into the gutter 12, and into a gutter downpipe 16 to clean debris from the opening thereof. The camera 138 has been rotated downward by angle D to better view the downpipe.

In one embodiment, the joint 144 allows removable assembly of the nozzle bodies 146 and 502, such that they can be swapped depending on the task at hand. In this instance, the joint 144 is a push-fit joint containing a seal for sealing the fluid channel. Such seals are known in the art.

Turning to Figures 8a and 8b, a gutter cleaning apparatus 600 is identical to the gutter cleaning apparatus 100 with the exception that the apparatus can introduce liquids into the fluid flow to the nozzle.

The air compressor 102 comprises an outlet tube 602 which is connected a Y-shaped connector 604 having two inlets 606, 608 and a single outlet 610 fed by the inlets 606, 608. The tube 602 is connected to the inlet 606 and comprises a non-return valve 612 in the flow path thereof to avoid fluid being returned towards the compressor 102 from the direction of the connector 604.

A water pump 614 is provided and connected to a suitable water source (not shown). The water pump, in this example, is a 30 -150 psi variable 12V DC pump which can be controlled with a pressure controller. The water pump 614 has an outlet tube 616 which is connected to the inlet 608 of the connector 604. The outlet tube 616 has a non-return valve 618 in the flow path thereof to prevent flow back to the pump 614.

The air compressor 102 and water pump 614 and connector 604 are stored within a container 615. The container 615 also contains a power supply for the pump 614 and compressor 102. The container has a connector 617 for attachment of the supply hose 108.

The supply hose 108 is connected to the connector 615 such that when both the compressor 102 and pump 614 are active, air and water respectively are mixed at the connector to exit at the head 104 as described with any of the previous embodiments.

In use, introduction of water can be beneficial to assist in detachment of stubborn debris. It can also help to wash away loose debris which is too dense to be ejected by air alone. It can also be used to confirm that the gutter is freely draining again, as water flow will be visible and audible from the gutter downpipe exit.

Both the pressure provided by the compressor and the liquid pump can be varied to provide the optimum mixture of air and water required by the user.

In addition to a water source, the liquid pump 614 may be connected to a source of fungicide and! or herbicide. In this manner, these chemicals can be introduced to the gutter to inhibit future growth.

Turning to Figures 9a to 9c, a roof cleaning apparatus 700 is shown, which shares many features of the gutter cleaning system 100.

Referring to Figure 9a, a schematic system view of the roof cleaning apparatus 700 is shown. The apparatus 700 generally comprises a compressor 702, a hollow lance 704 and head 706. The apparatus 700 is provided for cleaning a roof 14 attached to a building 10.

The compressor 702 is a powered air compressor which in this embodiment generates 7 bar (7kPa) air pressure. The compressor acts on ambient air and provides compressed air to a supply hose 708 which extends through the hollow lance 704 towards the head 706 as will be described below. The compressor will not be described in detail here, as it will be understood that compressors of this type are easily obtained by one skilled in the art.

The lance 704 comprises telescopic sections of carbon fibre tube. It will be understood that the length of the pole will be set by the user to reach the roof 14 for the cleaning task in hand.

The head 706 is shown in more detail in Figures 9b and 9c. It comprises a chassis 720 and a nozzle assembly 722. The chassis 720 has a pair of lightweight wheels 724 (of approximately 300mm diameter) mounted thereon to facilitate movement up and down the roof in direction D. The nozzle assembly 722 comprises an outlet nozzle 726 fed by the supply hose 708. The nozzle 726 is directed downwardly towards the roof 14 in use.

In use, air is fed to the nozzle 726 from the compressor and impinges on the roof 14 to remove dirt and debris. According to the invention, the compressor 702 may be used in conjunction with a source of fungicide, herbicide and / or weed killer (in the same manner as the gutter cleaning apparatus 600) to project such substances onto the roof surface to kill any e.g. moss or other weeds. The apparatus can be moved up and down the roof by applying a force to the lance 704 from the ground.

Figure 10 shows an alternative roof cleaning apparatus 800 which is similar to the apparatus 700 with the exception that the angle of a nozzle assembly 822 relative to a lance 804 can be adjusted remotely via a motor and remote control. The control may be connected to the motor via a wired or wireless connection as known in the art.

It is also envisaged that a camera can be used with this embodiment in the same way as described with respect to the above embodiments.

Figure 11 shows an alternative gutter cleaning apparatus 900 which is similar to the apparatus 100 with the exception that the camera 138 is mounted to the second portion 122 of the head 106.

Therefore, articulation of the joint 130 will keep the camera 138 directed at the nozzle 146.

Figure 12 shows an alternative nozzle body 146' which can be attached to the gutter cleaning apparatus 100. The nozzle body 146 comprises a 145 degree pipe section 148' which at its free end has a converging flow restriction or nozzle 150' having a fluid outlet for the ejection of high pressure air. The 145 degree elbow section provides a fluid outlet angle C' of 145 degrees.

Figure 13 shows a gutter cleaning apparatus 500' similar to that of Fig. 7. The gutter cleaning apparatus 500' is identical to the gutter cleaning apparatus 100 with the exception that the elbow-shaped nozzle body 146 has been replaced with a flexible downpipe cleaning nozzle 502'. The flexible downpipe cleaning nozzle 502' comprises a flexible pipe section 504' initially extending along the axis V which at its free end has a converging flow restriction 506' similar to the restriction 506. The flexible pipe section 504' is semi-rigid (i.e. capable of supporting some axial load).

As such, the downipe cleaning nozzle 502' can be inserted into the gutter 12', and into a gutter downpipe 16' having an angled portion (for example a cross-pipe) to clean debris therefrom.

The nozzle 502' can be provided in a number of user-selectable lengths, for example 500, 800, 1000 and 1200mm.

Figure 13a shows the flexible downpipe cleaning nozzle 502' with an alternative nozzle part 506" defining the flow restriction and having a long, thin body which is more suitable for piercing debris in the downpipe.

Figure 14 shows a gutter cleaning apparatus 1000 similar to that of Figure 1. The nozzle assembly 124 has been replaced an actuated grabber assembly 1002. The grabber assembly 1002 comprises an actuator 1004 and three claw-like fingers 1006 extending therefrom. The grabber assembly 1002 can be actuated remotely to draw the fingers 1006 together to grip or grab large pieces of debris or foliage within the gutter 12.

Figure 15 shows an exploded view of part of a gutter cleaning apparatus. A head 1100 is shown in exploded form, which can be attached to a lance as with the previous embodiments.

The head 1100 comprises a first portion 1102, a second portion 1104 and a nozzle assembly 1106. The first portion 1102 comprises a first joint part 1108 which can be attached to a lance.

The second portion 1104 comprises a second joint part 1110, a threaded attachment member 1112, a joint extension 1114, a collar 1116 and a T-piece 1118.

The nozzle assembly 1106 comprises a collar 1120, a nozzle extension 1122, a threaded attachment member 1124 and a nozzle 1126.

The first and second joint parts 1108, 1110 are shown in more detail in Figures 16a and 16b respectively.

The first joint part 1108 comprises a generally cylindrical body 1128 extending along a main axis X. The body 1128 is tubular-i.e. has a fluid passage 1130 passing therethrough. The passage 1130 defines a female thread 1132 proximate a free end of the body 1128 for attachment to a lance. Opposite the thread 1132 there is provided a circular, disc-like joint portion 1134. The joint portion 1134 defines a joint axis Z which is normal to the main axis X. In other words, the joint portion 1134 extends normal to the body 1128. The joint portion 1134 defines a central aperture 1136 extending along the axis Z. Concentric with the central aperture 1136 there is provided an annular fluid channel 1138. The annular fluid channel 1138 is in fluid communication with the fluid passage 1130 in the body 1128 and is open to one side of the joint portion 1134. At a radial outboard position on the joint portion 1134, and facing in the same direction as the fluid channel 1138 there is disposed a first clocking formation 1140 comprising an annular formation of radially extending ridges 1142. The ridges 1142 are triangular in cross-section creating a saw-tooth formation.

The second joint part 1110 comprises a generally cylindrical body 1144 extending along an axis Y. The body 1144 is tubular-i.e. has a fluid passage 1146 passing therethrough. The passage 1146 defines a female thread 1148 proximate a free end of the body 1144 for attachment to a lance. Opposite the thread 1148 there is provided a circular, disc-like joint portion 1150. The joint portion 1150 defines a joint axis Z which is normal to the axis Y. In other words, the joint portion 1150 extends normal to the body 1144. The joint portion 1150 defines a central aperture 1152 extending along the axis Z. Concentric with the central aperture 1136 there is provided an annular fluid channel 1154. The annular fluid channel 1154 is in fluid communication with the fluid passage 1146 in the body 1144 and is open to one side of the joint portion 1150. At a radial outboard position on the joint portion 1150, and facing in the same direction as the fluid channel 1154 there is disposed a second clocking formation 1156 comprising an annular formation of radially extending ridges 1158. The ridges 1158 are triangular in cross-section creating a saw-tooth formation. On the radially inner side of the fluid channel 1154 there is provided a first seal recess 1160. On the radially outer side of the fluid channel 1154 between the channel 1154 and the second clocking formation 1156 there is provided a second seal recess 1162.

The joint parts 1108, 1110 can be assembled to provide a fluid channel therethough, and are relatively rotatable about an axis Z between a plurality of predetermined angular positions. 0-rings are positioned in the seal recesses 1160, 1162 and the first and second parts 1108, 1110 are assembled by mating the clocking formations 1140, 1156. A mechanical fastener is positioned through the apertures 1136, 1152 (generally extending along the axis Z) and used to secure the parts 1108, 1110 together. The parts are held in a desired angular position (i.e. between axes X and Y) by the mating of the clocking formations. Should a change in the angle (equivalent to angle B in Figs. 3d! 3e) between the axes X and Y be desired, the fastener can be loosened to allow relative rotation of the parts about axis Z before re-tightening. It will be noted that fluid can pass from the passage 1130 to the passage 1146 through the joint, regardless of its position.

The threaded attachment members 1112, 1124 are generally cylindrical and tubular (having fluid passages therethrough). The threaded attachment members define a first and second male threads on the outer surface thereof, at each axial end.

The joint extension 1114 is cylindrical and tubular, having a fluid passage therethrough. The joint extension defines a female thread (not visible) at a first end and a flange 1168 at a second end, with an annular clocking formation (not shown, but similar to the formations 1140, 1156) at the same end as the flange 1168.

The collars 1116, 1120 are annular components with a female thread defined therein.

The T-piece 1118 is shown in more detail in Figures 17a and 17b. It comprises a cylindrical, tubular body 1170 having a fluid channel 1172 defined therethrough. At each end of the body 1170 there is provided a boss 1174, 1176. Each boss has a male thread on its outer surface, and a clocking formation 1178, 1180 on an annular end face (the centre of each face defining an opening to the channel 1172). Midway along the body 1170 there is provided a branch 1182 which is also tubular defining a branch channel 1184 in fluid communication with the channel 1172. The branch 1182 defines a female thread 1186.

The nozzle extension 1122 is cylindrical and tubular, having a fluid passage therethrough. The nozzle extension defines a female thread (not visible) at a first end and a flange 1188 at a second end, with an annular clocking formation (not shown, but similar to the formations 1140, 1156) at the same end as the flange 1188.

The nozzle 1126 is formed from an elbow shaped tubular body 1190 having an internal angle of 90 degrees. A fluid passage 1192 is defined within the body 1190. A female thread 1194 is defined at a first end, and a nozzle orifice 1196 at a second end. A reinforcing web 1198 extends between the two limbs of the body 1190.

Referring to Figure 15 again, the head 1100 is assembled as follows: * The first joint part 1108 and the second joint part 1110 are attached as described above to define a desired angle between axes X and Y. * The joint extension 1114 is attached to the second joint part 1110 using the attachment member 1112; * The joint extension 1114 is also attached to the T-piece 1118. The angle between the joint extension 1114 and the T-piece (i.e. axial rotation) can be selected by engaging the corresponding clocking formations and securing the components with the collar 1116.

* Similarly, the nozzle extension is attached to the T-piece 1118 in a similar manner.

* The nozzle 1126 is attached to the nozzle extension 1122 with the attachment member 1124.

A camera cleaning nozzle can be attached to the thread 1186 in the T-piece 1118 as desired. The respective clocking formations can be used to select the position of the thread 1186.

It will be noted that a continuous fluid passage is defined between the point at which the first joint part attaches to the lance, and the end of the nozzle. In this way, fluid can pass through the head 1110 without the need for separate fluid tubes or hoses.

Referring to Figures 19a and 19b, a downpipe cleaning assembly 1200 is shown. The downpipe cleaning assembly 1200 can be used in place of the nozzle 1126. The assembly 1200 comprises a flexible tube 1202 and a downpipe nozzle 1204. The tube has a male threaded portion 1206 at a first end, and a female threaded portion (not shown) at a second end.

The nozzle 1204 comprises a generally cylindrical, tubular body having a fluid channel 1206 therethrough. The nozzle has an attachment end 1208 and a free end 1210. The attachment end 1208 defines a female thread 1212 which can engage the male threaded portion 1206 of the flexible tube 1202. An axial downpipe direction D is defined from the attachment end 1208 to the free end 1210.

The free end 1210 has an endwall 1214 which inhibits axial expulsion of fluid from the channel 1206.

Instead, two opposed nozzle exit channels 1216 are defined, which reverse the direction of the fluid and are generally directed opposite to direction D (i.e. in direction -D). Thus, pressurised fluid within the channel 1206 is directed back towards the attachment end 1208. The free end 1210 has a pointed external tip 1218 for dislodging material in downpipes.

In use, the downpipe cleaning assembly 1200 can be inserted into downpipes as described with reference to Figure 13.

Figure 20 shows a gutter scraper 1300, which can replace the nozzle 1126. The gutter scraper 1300 comprises a cylindrical body 1302 comprising a female thread 1304 at an attachment end 1306. Opposite the attachment end 1306, there are provided two legs 1308, 1310. The legs 1308, 1310 are symmetrical about the axis V and diverge away from each other. Each leg 1308, 1310 has a generally planar base 1309, 1311, and has a free end 1312 having an edge 1314 for scraping matter from the base of gutters. Each leg 1308, 1310 defines a pair of opposed sidewalls 1316, 1318 (shown on leg 1308 only) which form an open "scoop" with the leg 1308. The sidewalls 1316, 1318 also adds structural stiffness to the scraper 1300.

It will be noted that the scraper is "closed"-i.e. it has no open fluid channel.

Turning to Figures 21 and 22, there is shown an arrangement which is an alternative configuration to Figs. 9a to 10. In Figure 21, a roof cleaning apparatus 1400 comprises a first ski 1402, second ski 1404, a cross piece 1406 and a nozzle assembly 1408.

The first and second skis 1402, 1404 are identical and each define a flat, roof contacting member 1410 (labelled for ski 1402 only) having a mounting portion 1412. The roof contacting member 1410 is shaped like a ski and has an upturned lip 1414 at a first end. The mounting portion 1412 comprises a flange 1416 extending planar to the roof contacting member 1410 and defining a collar 1418 having an axis R generally normal to the longitudinal direction of the ski.

The cross piece 1406 comprises a shaft 1420 which is received in the collars of the skis 1402, 1404 such that the skis are held in a parallel but offset configuration.

The nozzle assembly 1408 comprises a bracket 1422 having a first opening 1424 and a second opening 1426 offset and normal thereto. When the cross piece 1406 is received in the first opening, the second opening 1426 runs generally parallel to the skis 1402, 1404. The nozzle assembly further comprises a tube 1428 terminating in an angled nozzle 1430 which is similar to the nozzle 1126. The tube 1428 is received in the second opening 1426 and can be rotated therein about an axis X parallel to the skis.

As shown in Figure 21, the nozzle 1430 can be oriented such that it is directed at a roof surface beneath the skis 1402, 1404. As such, it can be used to propel cleaning fluids onto the roof to clean it.

Turning to Figure 23, an alternative nozzle 1500 to nozzle 1126 is shown. The nozzle 1500 comprises an angled part 1502 and a replaceable tip 1504. The angled part is an elbow shaped tubular body having an internal angle of 110 degrees. A fluid passage 1506 is defined within the part 1502. A female thread 1508 is defined at a first end, and a male thread 1510 at a second end. The tip 1504 defines the nozzle flow restriction and has a female thread 1512 for attachment to the angled part 1502. The tip 1504 can become worn through use (for example by physically agitating / dislodging the material blocking the gutter) and as such can be easily and inexpensively replaced.

Figure 24 shows a further alternative angled part 1502' in which an annular flange 1512 is provided adjacent a thread 1510'. The flange 1512 has a pair of diametrically opposed lugs 1514, 1516.

Turning to Figure 25a, an alternative scraper 2000 is shown which is compatible with a nozzle comprising the angled part 1502'. The scraper 2000 comprises a generally "U"-shaped body 2002 having a base portion 2004 and two opposing upstanding flanges 2006, 2008. The base portion 2004 and flanges 2006, 2008 each terminate in a leading scraping edge 2005, 2007, 2009, thus forming a "U"-shaped leading scraping edge 2010.

An attachment portion 2012 extends from the same face of the base portion 2004 as the flanges 2006, 2008. The attachment portion 2012 forms an angle A with the base portion where A<90. The attachment portion 2012 defines an opening 2116. It will be noted that the attachment portion 2012 defines a plurality of radial slots 2114. The opening can receive the thread 1510' of the angled part 150T. The scraper angle can be selected by engaging the lugs 1514, 1516 with the slots 2114. The attachment portion 2012 is trapped between the flange 1512 and an attached nozzle part e.g. 1504. In this way, the scraper 2000 can be used to mechanically scrape debris from a roof or gutter (using the scraping edges) before blowing / washing the debris away with the fluid nozzle attached to the attachment portion 2012.

The panel structure of the scraper 2000 means that it is very light, and therefore does not cause damage to the roof.

Referring to Figure 25b, there is shown an alternative design of scraper 2100 to the scraper 2000. The scraper 2100 comprises a generally "U"-shaped body 2102 having a base portion 2104 and two opposing upstanding flanges 2106, 2108. The base portion 2104 and flanges 2106, 2108 each terminate in a leading scraping edge 2105, 2107, 2109. The leading scraping edge 2105 of the base portion 2104 has a U-shaped concave formation or notch 2120 formed therein.

An attachment portion 2112 extends from the same face of the base portion 2104 as the flanges 2106, 2108. The attachment portion 2112 forms an angle A with the base portion where A<90. The attachment portion 2112 defines an opening 2116. It will be noted that the attachment portion 2012 defines a plurality of radial slots 2114. The opening can receive the thread 1510' of the angled part 15021. The scraper angle can be selected by engaging the lugs 1514, 1516 with the slots 2114. The attachment portion 2012 is trapped between the flange 1512 and an attached nozzle part e.g. 1504. In this way, the scraper 2100 can be used to mechanically scrape debris from a roof or gutter (using the scraping edges) before blowing / washing the debris away with the fluid nozzle attached to the attachment portion 2112. The attachment portion 2112 is angled such that the fluid nozzle is directed towards the notch 2120 such that debris collected in the notch as a result of scraping is cleared.

Figures 26 to 29 show parts of a further gutter cleaning apparatus. Figures 26 and 27 show an end section 2202 of a lance (comparable to the end section 114 described above). Figures 28 and 29 show part of a head 2204 (comparable to the head 106 described above).

Referring to Figures 26 and 27, the end section 2202 comprises a straight first portion 2206 and a straight second portion 2208 joined by a curved portion 2210 defining an internal angle A = 130 degrees to provide a "goose-neck" section. As such, the second portion 2208 projects at an angle of 130 degrees to the first portion 2206.

Unlike the end section 114 of Figure 2, the end section 2202 has a fluid inlet port 2212 in fluid communication with a fluid channel 2214 extending to a threaded outlet port 2216 at a free end of the second portion 2208. Therefore a fluid supply hose can be connected to the inlet port 2212 via e.g. a threaded connection.

Referring to Figures 28 and 29, the head 2204 comprises a first portion 2218, a second portion 2220 and a nozzle assembly 2222.

The first portion 2218 comprises a first joint part 2224 which is attachable to the threaded outlet 2216 of the end section 2202.

The second portion 2220 comprises a second joint part 2226 which engages with the first joint part 2224 in the same way as described above with reference to parts 1108, 1110.

A nozzle may be attached to the free end of the nozzle assembly 2222. Variations fall within the scope of the present invention.

Any of the features described in relation to the embodiments above may be combined with any others to form a product.

It is envisaged that the lance, goose-neck and camera are common components, and a kit is provided with a range of attachments which may include: * At least one angled nozzle; * A rigid downpipe cleaner; * At least one flexible downpipe cleaner; * A grabber attachment; * A wheeled roof cleaner.

It is also envisaged that the kit may contain the equipment necessary to introduce liquid into the fluid flow (as described above).

Although the apparatus is suitable for cleaning gutters, it will be understood that the scope of the invention covers apparatuses which are suitable for cleaning a wide range of out-of-reach surfaces.

The "goose-neck" angle A may be between 80 and 160 degrees.

The T-piece 302 may be replaced by a 3 port solenoid controlled valve to allow remote control of the gutter and camera cleaning flows.

The lance may be telescopic or modular for ease of collapse and storage, and may be constructed from glass or carbon fibre composite materials. Other composite materials are envisaged as they provide a combination of low density and high strength.

The use of data cables may be replaced by wireless communications such as Wi-R (TM) or Bluetooth (TM). In this case power may be delivered to the actuator(s) by a battery or separate power cable from the ground location.

Referring to Figure 2, the straight second portion 118 of the end section may comprise a replaceable part such that the length of the second portion can be varied. This will vary the distance between the curved portion 120 and the head 106.

Claims

Claims 1. A roof cleaning apparatus head comprising: a chassis haying a roof-contacting element in the form of a ski; and, a fluid outlet attached to the chassis and configured to be directed at a roof surface contacted by the ski in use.
2. A roof cleaning apparatus according to claim 1, wherein the fluid outlet is rotatable to vary an angle of impingement on the roof.
3. A roof cleaning apparatus head according to claim 1 or 2, comprising a first ski and a second ski disposed on either side of the fluid outlet.
4. A roof cleaning apparatus head according to claim 3, comprising a cross-piece extending between the first ski and the second ski, wherein the fluid outlet is mounted to the cross-piece such that it can rotate about an axis perpendicular to the longitudinal axis of the skis.
5. A roof cleaning apparatus head according to any of claims 1 to 4, wherein a fluid conduit defines leads to the fluid outlet, the fluid conduit having an angled section to direct the fluid outlet to the roof surface in use.
6. A roof cleaning apparatus comprising: a lance; a roof cleaning apparatus head according to any preceding claim attached to an end of the lance; and, a fluid source connected to the fluid outlet to provide pressurised fluid in use.
7. A roof cleaning apparatus according to claim 6, comprising: an air compressor; and, a pressurised liquid source; wherein pressurised air from the air compressor and the pressurised liquid are mixed before reaching the fluid outlet.