A surface finishing tool

Abstract

A surface finishing tool comprises a tool head and a motor mounted to the tool head. A battery is mountable to the tool head and electrically connectable to the motor. A rotor is operatively coupled to the motor and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface. A handle connected to the tool head. A longitudinal axis of the battery is inclined with respect to the rotor axis.

Description

[0001] A surface finishing tool

[0002] Field

[0003] The present disclosure relates to a finishing tool. In particular the present disclosure relates to finishing tools for finishing surfaces such as concrete.

[0004] Background

[0005] Often concrete or another material is poured on worksites and a smooth finish to the concrete is desired. It is known to use a tool to finish the surface of e.g. concrete, screed or another similar material.

[0006] One such tool is a power trowel as shown in US2022 / 0268036. The power trowel is a concrete finishing apparatus comprising rotating blades mounted on a powered unit for creating smooth, flat surfaces on e.g. concrete, screed or another similar material.

[0007] A problem with the tool in US2022 / 0268036 is that the user may have difficulty handling the tool or even moving the tool across the surface to be finished. Furthermore, the arrangement of the components in US2022 / 0268036 mean that exchanging the battery can only be achieved from the front of the tool which is inconvenient for the user during operation.

[0008] Another problem with the tool in US2022 / 0268036 is that the motor fan assembly draws in air from the external environment. Since the tool is used on a worksite, the airflow can contaminate the interior of the tool with moisture and dirt from the worksite which can damage the motor.

[0009] Another problem with the tool in US2022 / 0268036 is that the footprint of the tool is large. This means that the tool is difficult to transport and store. The user can detach the handle from the tool, but the tool can be incorrectly configured if the user reassembles the tool incorrectly. This can mean the tool does not generate an optimum finish on the surface.

[0010] Another problem with the tool in US2022 / 0268036 is that adjustment of the rotor blades can be difficult. Some worksite operations may require a large variation in the pitch angle of the rotor blade. However, the user is required to rotate the adjustment knob many times in US2022 / 0268036 to create a large pitch variation. This adjustment mechanism is tedious and inefficient for the user.

[0011] Another problem with the tool in US2022 / 0268036 is that when the tool is at the worksite, the tool needs to be lifted to move the tool around between different surfaces to be finished. This requires a two-man job or lifting equipment which can be awkward especially if the surface to be finished is in a confined space.Another problem with the tool in US2022 / 0268036 is that the controller projects from the housing and is exposed to dirt and debris on the worksite. Furthermore, the controller is cooled passively which may be insufficient when the ambient temperature of the worksite is high.

[0012] Another problem with the tool in US2022 / 0268036 is that the user can adjust the motor speed with the controller with a speed adjustment switch. This does not provide the user with sufficient adjustability for the tool and therefore the user cannot achieve a desired finish on the surface. Furthermore, the user may not be able to consistently obtain a desired rotor speed with the controls as shown in US2022 / 0268036.

[0013] Another problem with the tool in US2022 / 0268036 is the tool can suffer damage if inverted and dropped onto a hard surface. For example, the battery and controller project from the tool housing and these components of the tool are vulnerable to shock damage in the case where a tool is dropped or even positioned in an inverted position.

[0014] Examples of the present disclosure aim to address the aforementioned problems.

[0015] According to a first aspect of the present disclosure there is a surface finishing tool comprising: a tool head; a motor mounted to the tool head; a battery removably mountable to the tool head and electrically connectable to the motor; a rotor operatively coupled to the motor and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface; and a handle connected to the tool head, wherein a longitudinal axis of the battery is inclined with respect to the rotor axis.

[0016] Optionally, the rotor axis is between the battery when mounted to the tool head and the handle.

[0017] Optionally, a centre of gravity of the battery when mounted to the tool head is at a first distance from the rotor axis and the centre of gravity of the handle is at a second distance from the rotor axis and the first distance is smaller than the second distance.

[0018] Optionally, a force due to the battery about the rotor axis is balances a force due to the handle about the rotor axis.

[0019] Optionally, the longitudinal axis of the battery is inclined towards the handle.

[0020] Optionally, the angle of inclination of the longitudinal axis of the battery with respect to the rotor axis is between 5 degrees to 45 degrees.

[0021] Optionally, a battery centre of gravity is offset from the rotor axis.

[0022] Optionally, a motor axis is offset from the rotor axis.Optionally, the rotor axis is between the motor axis and the battery.

[0023] Optionally, the motor axis is closer to the rotor axis than a battery centre of gravity.

[0024] Optionally, at least one gear operatively couples the motor and the rotor.

[0025] Optionally, the pitch of the at least one rotor blade is adjustable.

[0026] Optionally, the handle is foldable.

[0027] Optionally, the handle comprises a T-bar gripping portion.

[0028] Optionally, a longitudinal axis of the handle is inclined to the rotor axis.

[0029] According to a second aspect there is provided a surface finishing tool comprising: a tool head; a motor mounted to the tool head; a battery receiver mounted to the tool head and configured to removably receive a battery; a rotor operatively coupled to the motor and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface; and a handle connected to the tool head, wherein the battery is receiver is configured such that, when the battery is mounted to the battery receiver, a longitudinal axis of the battery is inclined with respect to the rotor axis.

[0030] According to a third aspect of the present disclosure there is a surface finishing tool comprising: a tool head; a motor fan assembly mounted to the tool head, the motor fan assembly is arranged to generate a first airflow along a first airflow path between at least one air inlet and at least one air outlet; a rotor operatively coupled to the motor assembly and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface; wherein the at least one air inlet is positioned on a side of the tool head and the tool head comprises a second airflow along a second airflow path arranged to cool the motor fan assembly and the second airflow is isolated from the first airflow.

[0031] Optionally, the second airflow is within a sealed motor housing.

[0032] Optionally, at least a portion of the first airflow path is adjacent to a first side of a motor housing wall and at least a portion of the second airflow path is adjacent to a second side of the motor housing wall.

[0033] Optionally, the second airflow is generated via rotating agitator.

[0034] Optionally, the at least one air inlet is a plurality of air inlets circumferentially arranged around a tool housing.Optionally, the at least one air outlet is a plurality of air outlets arranged around a tool housing.

[0035] Optionally, the at least one air outlet is positioned closer to the surface to be finished than that air inlet when in use.

[0036] Optionally, the first airflow path is perpendicular to a motor axis of the motor fan assembly at the at least one airflow inlet.

[0037] Optionally, the first airflow path is substantially parallel to a motor axis of the motor fan assembly at the at least one airflow outlet.

[0038] Optionally, the motor fan assembly is arranged to generate the first airflow when driving the rotor.

[0039] Optionally, one or more heatsink is positioned along the first airflow path.

[0040] Optionally, the one or more cooling ribs transfer heat from a controller.

[0041] Optionally, the controller is mounted to a first side of a controller PCB.

[0042] Optionally, the heatsink is mounted to a second side of the controller PCB.

[0043] Optionally, a controller bracket is coupled to the controller PCB and a tool housing and the first side of the controller PCB is separated from the airflow along the first airflow path.

[0044] Optionally, the tool housing comprises a fan baffle extending over the motor fan assembly arranged to guide the first airflow to the at least one air outlet.

[0045] Optionally, the direction of the first airflow along the first airflow path is from the at least one air inlet to the at least one air outlet when the motor rotates in a first direction or a second direction.

[0046] Optionally, the tool head comprises a top portion opposite a bottom portion comprising the at least one rotor blade and the at least one air inlet is positioned on the side of the tool head between the top portion and the bottom portion.

[0047] According to a fourth aspect of the present disclosure there is a surface finishing tool comprising: a tool head; a motor mounted to the tool head; a rotor operatively coupled to the motor and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage the surface; and a foldable handle connected to the tool head: wherein the foldable handle is moveable between an extended configuration and a folded configuration.Optionally, the foldable handle comprises a plurality of pivotally connected handle frame portions.

[0048] Optionally, the foldable handle comprises a first handle frame portion fixed with respect to the tool head wherein one or more other handle frame portions are pivotally mounted to the first handle frame portion.

[0049] Optionally, the foldable handle comprises one or more fasteners for selectively securing the plurality handle frame portions in the extended configuration.

[0050] Optionally, the one or more fasteners are configured to selectively secure the plurality of handle frame portions in the folded configuration.

[0051] Optionally, the one or more fasteners are threaded fasteners.

[0052] Optionally, the foldable handle comprises a second handle frame portion and a third handle frame portion pivotally connected to each other and arranged to fold adjacent to each other in the folded configuration.

[0053] Optionally, the foldable handle comprises a pivotally connected handle gripping portion.

[0054] Optionally, the handle gripping portion comprises at least one user interface configured to control the motor and / or the at least one rotor blade.

[0055] Optionally, the user interface is connected to the tool head when the foldable handle is in the extended configuration and the folded configuration.

[0056] Optionally, the user interface is connected to the tool head via a cable and the cable threaded along the foldable handle via a plurality of cable pulleys and / or wire routed along or within a frame of the foldable handle.

[0057] Optionally, a blade guard is mounted to the tool head arranged to cover the at least one rotor blade.

[0058] Optionally, the foldable handle when in the folded configuration is within a perimeter defined by the blade guard.

[0059] Optionally, at least a portion of the foldable handle is adjacent to the tool head when the foldable handle is in the folded configuration.

[0060] According to a fifth aspect of the present disclosure there is a surface finishing tool comprising: a tool head; a motor mounted to the tool head; a rotor operatively coupled to the motor and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface and the at least one rotor blade is rotatable about a blade pivot axis such that the pitch angle of the rotor blade with respect to the surface is adjustable; a moveablepressure plate mounted to the tool head and mechanically coupled to the at least one rotor blade such that movement of the pressure plate rotates the at least one rotor blade about the blade pivot axis; and a pressure plate adjustment mechanism connected to the moveable pressure plate and configured to adjust the pitch angle of the at least one rotor blade; wherein the pressure plate adjustment mechanism comprises a coarse blade angle adjustment mechanism and a fine blade angle adjustment mechanism.

[0061] Optionally, the pressure plate adjustment mechanism is mounted on a handle connected to the tool head.

[0062] Optionally, the coarse blade angle adjustment mechanism is moveably mounted on the handle.

[0063] Optionally, the coarse blade angle adjustment mechanism is pivotally mounted on the handle.

[0064] Optionally, the coarse blade angle adjustment mechanism and the fine blade angle adjustment mechanism are mechanically coupled.

[0065] Optionally, the fine blade angle adjustment mechanism comprises a first adjustment gear engageable with a second adjustment gear fixed with respect to the handle frame.

[0066] Optionally, the first adjustment gear is a worm gear.

[0067] Optionally, the fine blade angle adjustment mechanism comprises a shift lever to selectively disengage the first adjustment gear engageable from the second adjustment gear.

[0068] Optionally, the wherein the first adjustment gear is biased towards the second adjustment gear.

[0069] Optionally, the pressure plate adjustment mechanism is connected to the moveable pressure plate via a pressure plate cable.

[0070] Optionally, the pressure plate cable is coupled to the moveable pressure plate via a pressure plate lever.

[0071] Optionally, the pressure plate cable is threaded along the handle via a plurality of cable pulleys.

[0072] Optionally, the handle is foldable between an extended configuration and a folded configuration and the pressure plate adjustment mechanism is connected to the moveable pressure plate when the handle is in the extended configuration and the folded configuration.

[0073] Optionally, the moveable pressure plate is mounted around a rotor axis and moveable in a direction perpendicular to the rotor axis.Optionally, the moveable pressure plate is mechanically coupled to the at least one rotor blade via a rotor blade pivot arm.

[0074] According to a sixth aspect of the present disclosure there is a surface finishing tool comprising: a tool head; a motor mounted to the tool head; a battery receiver for receiving a battery; a rotor operatively coupled to the motor and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface; and at least one transportation wheel moveable between a deployed position and a retracted position wherein the at least one transportation wheel is engageable with the surface or the ground when in the deployed position.

[0075] Optionally, a transport wheel bracket is fixed with respect to a blade guard and the at least one transportation wheel is moveably connected to the transport wheel bracket.

[0076] Optionally, the blade guard is connected to the tool head and the transport wheel bracket is mounted to the blade guard.

[0077] Optionally, the at least one transportation wheel projects beyond the blade guard when in the deployed position.

[0078] Optionally, the at least one transportation wheel is pivotally mounted to the transport wheel bracket via a foldable wheel leg.

[0079] Optionally, longitudinal axis of the foldable wheel leg is inclined with respect to the rotor axis when the at least one transportation wheel is in the deployed position.

[0080] Optionally, the at least one transportation wheel comprises a wheel locking mechanism.

[0081] Optionally, the wheel locking mechanism comprises a wheel leg securing pin arranged to respectively engage a first wheel securing hole and a second wheel securing hole in the transport wheel bracket when the at least one transportation wheel is in the deployed position and the retracted position.

[0082] Optionally, a handle is connected to the tool head and the at least one transportation wheel is mounted on the same side of the surface finishing tool as the handle.

[0083] Optionally, the at least one transportation wheel when in the deployed position is between a centre of gravity of the handle and the tool head.

[0084] Optionally, the at least one transportation wheel is a first transportation wheel and a second transportation wheel.Optionally, the first transportation wheel and the second transportation wheel are arranged to be positioned either side of the handle when in the retracted position.

[0085] Optionally, an axis of rotation of the at least one transportation wheel is perpendicular to the rotor axis of the rotor.

[0086] Optionally, the finishing tool comprises a battery removably mountable to a battery received mounted to the tool head and electrically connectable to the motor.

[0087] Optionally, a longitudinal axis of the battery is inclined with respect to an axis of the at least one transportation wheel.

[0088] According to a seventh aspect of the present disclosure there is a surface finishing tool comprising: a tool head; a motor fan assembly mounted to the tool head, the motor fan assembly arranged to generate a first airflow along a first airflow path between at least one air inlet and at least one air outlet; a rotor operatively coupled to the motor fan assembly and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface; a controller configured to send control signals to the motor fan assembly mounted in the tool head; wherein the first airflow path is located in a first housing volume and the controller is located in a second housing volume and is separated from the first airflow path.

[0089] Optionally, a barrier is mounted within a tool housing mounted to the tool head and separates the tool housing into the first housing volume comprising the first airflow path and the second housing volume comprising the controller.

[0090] Optionally, the barrier is a controller bracket coupled between the controller and the tool housing.

[0091] Optionally, the controller is mounted on a first side of a controller PCB and the controller bracket is arranged to engage the controller PCB such that the first side of the controller PCB is in fluid communication with the first housing volume and the second side of the controller PCB is in fluid communication with the second housing volume.

[0092] Optionally, at least a portion of the first airflow path is adjacent to a first side of a motor housing wall.

[0093] Optionally, the at least one air inlet is a plurality of air inlets arranged around the tool housing.

[0094] Optionally, the at least one air outlet is a plurality of air outlets circumferentially arranged around the tool housing.

[0095] Optionally, the at least one air outlet is positioned closer to the surface to be finished than that air inlet when in use.

[0096] Optionally, the first airflow path is perpendicular to a motor axis of the motor fan assembly at the at least one airflow inlet.Optionally, the first airflow path is substantially parallel to a motor axis of the motor fan assembly at the at least one airflow outlet.

[0097] Optionally, the motor fan assembly is arranged to generate the first airflow when driving the rotor.

[0098] Optionally, one or more heatsinks in thermal connection with the controller are positioned along the first airflow path.

[0099] Optionally, the heatsinks are mounted to the second side of the controller PCB.

[0100] Optionally, the tool housing comprises at least wire hole in the second housing volume arranged to receive one or more wires connected to the controller.

[0101] Optionally, the barrier seals the first housing volume from the second housing volume.

[0102] Optionally, the second housing is substantially sealed from the first airflow path and wherein the surface finishing tool further comprises a heat conductive element configured to thermally couple the controller to the first airflow path so as to provide cooling for the controller.

[0103] According to a eighth aspect of the present disclosure there is a surface finishing tool comprising: a tool head; a motor mounted to the tool head; a battery receiver for removably receiving a battery; a rotor operatively coupled to the motor and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface; and a controller configured to send control signals to the motor fan assembly; and a speed controller connected to the controller and comprising a speed actuator having a plurality of selectable discrete speed settings; wherein the speed controller is configured to send a signal to the controller corresponding to a selected discrete speed setting of the speed actuator.

[0104] Optionally, the speed actuator is rotatably mounted to a speed controller housing.

[0105] Optionally, the speed actuator is a rotatable knob or a rotatable dial.

[0106] Optionally, the speed actuator comprises a speed actuator detent mechanism.

[0107] Optionally, the speed actuator detent mechanism comprises a speed actuator spring selectively engageable with a plurality of recesses on the speed actuator.

[0108] Optionally, the speed actuator spring is mounted to the speed controller housing.

[0109] Optionally, the plurality of recesses each correspond to a different angular position of the speed actuator.Optionally, the speed actuator is coupled to a potentiometer.

[0110] Optionally, the speed actuator comprises a projecting lever.

[0111] Optionally, the speed actuator comprises a speed actuator shaft and a shaft seal is mounted to the speed actuator shaft.

[0112] Optionally, the speed controller is mounted on a handle of the finishing tool.

[0113] Optionally, the speed controller housing comprises a first housing part and a second housing part and a seal is mounted between the first housing part and the second housing part.

[0114] Optionally, the speed actuator comprises a projecting skirt which overlaps a portion of the speed controller housing.

[0115] Optionally, the speed actuator comprises rotation sensor arranged to detect a relative discrete position of the speed actuator.

[0116] Optionally, the speed actuator is rotatable about a speed actuator rotation axis less than 360 degrees.

[0117] According to a ninth aspect of the present disclosure there is a surface finishing tool comprising: a tool head; a motor mounted to the tool head; a rotor operatively coupled to the motor and arranged to rotate about a rotor axis, the rotor comprising at least one rotor blade arranged to engage a surface; and a handle connected to the tool head; and a utility arm moveable between a plurality of different utility arm positions wherein each utility arm position corresponds to a different function of the utility arm.

[0118] Optionally, the utility arm is moveable to a first utility arm position wherein the utility arm projects over a battery mounted to the tool head.

[0119] Optionally, when the utility arm is in the first utility arm position, the utility arm is engageable with the surface when the finishing tool is in an upended position.

[0120] Optionally, the finishing tool comprises a blade guard connected to the tool head and only the utility arm and the blade guard are engageable with the surface when the finishing tool is in the upended position.

[0121] Optionally, the utility arm is moveable to a second utility arm position wherein the utility arm is positioned above the rotor and / or the motor.Optionally, the utility arm comprises lifting point arranged to support the finishing tool when the utility arm is in the second utility arm position.

[0122] Optionally, the utility arm is moveable to a third utility arm position wherein the utility arm secures one or more moveable components of the finishing tool against the tool head.

[0123] Optionally, the finishing tool comprises a foldable handle and the foldable handle is moveable between an extended configuration and a folded configuration, and the utility arm is arranged engage the foldable handle in the folded configuration when the utility arm is in the third utility arm position.

[0124] Optionally, the foldable handle comprises a plurality of pivotally connected handle frame portions.

[0125] Optionally, the foldable handle comprises a first handle frame portion fixed with respect to the tool head wherein one or more other handle frame portions are pivotally mounted to the first handle frame portion.

[0126] Optionally, the foldable handle comprises a second handle frame portion and a third handle frame portion pivotally connected to each other and arranged to fold adjacent to each other in the folded configuration.

[0127] Optionally, the foldable handle when in the folded configuration is within a perimeter defined by the blade guard.

[0128] Optionally, at least a portion of the foldable handle is adjacent to the tool head when the foldable handle is in the folded configuration.

[0129] Optionally, the utility arm is pivotally mounted to the finishing tool.

[0130] Optionally, the second utility arm position is between the first utility arm position and the third utility arm position.

[0131] Optionally, the finishing tool comprises a utility arm locking mechanism arranged to selectively lock the utility arm in each of the plurality of different utility arm positions.

[0132] Brief Description of the Drawings

[0133] Various other aspects and further examples are also described in the following detailed description and in the attached claims with reference to the accompanying drawings, in which:

[0134] Figure 1 shows a perspective view of a walk-behind surface finishing tool according to some examples;

[0135] Figure 2 shows a side view of a walk-behind surface finishing tool according to some examples;

[0136] Figure 3 shows a close-up side view of the walk-behind surface finishing tool as shown in Figure 2 according to some examples;Figure 4 shows a close-up perspective view of a walk-behind surface finishing tool as shown in Figure 1 according to some examples;

[0137] Figure 5 shows a perspective view of part of a walk-behind surface finishing tool without a blade guard according to some examples;

[0138] Figure 6 shows a front cross-sectional view of a tool head of a walk-behind surface finishing tool according to some examples;

[0139] Figure 7 shows a perspective view of part of a tool head of a walk-behind surface finishing tool according to some examples;

[0140] Figure 8 shows a plan view of a walk-behind surface finishing tool according to some examples;

[0141] Figures 9a and 9b respectively show a front view and a plan view of part of a handle of a walk-behind surface finishing tool;

[0142] Figures 10a, 10b, 11a, 11b, 11c, 11 d show a walk-behind surface finishing tool with a foldable handle in different positions according to some examples;

[0143] Figure 11e shows a frontviewof a component of the walk-behind surface finishing tool according to some examples; Figures 12a, 12b, and 12c respectively show a perspective view, a front view, and a reverse perspective view of a pressure plate adjustment mechanism for a walk-behind surface finishing tool according to some examples;

[0144] Figures 13a and 13b show a schematic side view of a pressure plate adjustment mechanism for a walk-behind surface finishing tool according to some examples;

[0145] Figures 14a, 14b, and 14c show different examples of a speed controller for a walk-behind surface finishing tool according to some examples;

[0146] Figure 15 shows a side view of a walk-behind surface finishing tool with a transportation wheel according to some examples;

[0147] Figures 16a and 16b show a side view of a walk-behind surface finishing tool with a transportation wheel in a deployed position according to some examples;

[0148] Figures 17a and 17b respectively show a perspective and perspective cross-sectional view of a speed controller for a walk-behind surface finishing tool according to some examples;

[0149] Figure 18 shows a walk-behind surface finishing tool with a foldable handle in a folded positions according to some examples; and

[0150] Figures 19 and 20 show a schematic side view of a pressure plate adjustment mechanism for a walk-behind surface finishing tool according to some examples.

[0151] Detailed

[0152] Figure 1 shows a perspective view of a walk-behind surface finishing tool 100. The walk-behind surface finishing tool 100 is used for finishing a surface 282 such as concrete. Figure 16a also shows the finishing tool 100 engaged with the surface 282. The surface 282 is typically a surface to be finished which requires smoothing or polishing. The surface 282 can typically be a concrete surface which has recently been poured. The walk-behind surface finishing tool 100, as shown in Figure 1, may also be known as a power trowel, a power float, a trowelling machine or ahelicopter trowel. Hereinafter, for the purposes of brevity, the walk-behind surface finishing tool, as shown in Figure 1, will be referred to as a “finishing tool 100”.

[0153] The finishing tool 100 comprises a handle 102 for the user to grip whilst operating the finishing tool 100. The handle 102 allows the user to walk behind the finishing tool 100 whilst finishing a surface 282. The finishing tool 100 comprises a tool head 108 in which a plurality of components are mounted therein.

[0154] The tool head 108 in some examples is a power unit 108 which is connected to the handle 102 via handle frame 104. The tool head 108 comprises a motor 120 mounted within a tool housing 118. The motor 120 is operatively coupled to a rotor 112. In some examples, the motor 120 is mounted to a gearbox 312 (best shown in the Figure 6) which operatively couples the motor 120 to the rotor 112. The gearbox 312 may be a connection element for the motor 120, the rotor 112, the handle frame 104 and the battery connector 110. The rotor 112 comprises a plurality of rotor blades 114 which rotate about a rotor axis 124. The rotor blades 114 in use engage the surface 282 to be finished. In some examples, the tool housing 118 is mounted to the gearbox 312 and is a plastic shroud that covers the components of the tool head 108.

[0155] As shown in figure 1, the rotor 112 comprises a plurality of rotor blades 114, which are each configured to engage the surface 282. The rotor blades 114, when they engage the surface 282, smooth, polish or abrade the surface 282 as required. In some examples, the rotor blades 114 are made from metal, e.g. steel, but in other examples, the rotor blades 114 can be made from any suitable material for treating the surface 282. The rotor blades 114, as shown in figure 1, are pivotable such that the pitch angle of the rotor blades 114 is variable. This means that the angle of inclination of the rotor blades 114 with respect to the surface 282 can be varied. The mechanism for varying the angle of the rotor blades 114 will be discussed in further detail below.

[0156] A battery 106 is mounted to the tool head 108 and is electrically connected to the motor 120. The battery 106 is mounted on the tool head 108 via battery connector 110. The battery connector 110 allows the battery 106 to be mechanically connected to the tool head 108 as well as being electrically connected to the motor 120 and a controller 154. The finishing tool 100 as shown in the figures is a battery 106 operated finishing tool 100. However, in some alternative examples the motor 120 can be powered additionally or alternatively via a mains power supply (not shown). In other examples, the battery may be mountable to another part of the finishing 100, such as the handle frame 104. The battery 106 may be removable so that it can be recharged.

[0157] The handle 102 as shown in figure 1 generally comprises a T-bar configuration and the handle 102 comprises gripping portions 148 connected thereto by a handle crossbar portion 228. Whilst the handle 102 as shown in figure 1 is generally shown as a T-bar configuration in other examples other handle 102 configurations can be used. The handle 102 is connected to the tool head 108 and the gearbox 312 via a handle frame 104. The handle frame 104 as discussed below comprises a plurality of handle frame portions 162, 164, 166. When the handle frame 104 is in anextended configuration as shown in Figure 2, the handle frame 104 extends along a handle frame longitudinal axis 254.

[0158] The tool housing 118 may comprise a clam shell design. The tool housing 118 is secured by a plurality of fasteners. The tool housing 118 is secured by a plurality of fasteners. For example, the tool housing 118 may be secured by double fasteners.

[0159] Turning to figures 2 and 3, the finishing tool 100 will be discussed in more detail. As mentioned above, the tool head 108 comprises a motor 120 fordriving the rotor 112. The motor 120 comprises a motor axis 122. The motor axis 122, as shown in figure 3, is offset by an axis offset 126 from the rotor axis 124. The axis offset 126 is a distance that the motor axis 122 is laterally offset from the rotor axis 124 in a direction perpendicular to the rotor axis 124. The motor 120 is operatively connected to the rotor 112 by gearing 142, best shown in figure 6.

[0160] The motor axis 122 is parallel to the rotor axis 124. The motor axis 122 and the rotor axis 124 extend in a direction generally parallel to the longitudinal axis of the tool head 108. As shown in figure 3, the finishing tool 100 is in an orientation where the motor axis 122 is perpendicular to a surface 282 to be finished when the finishing tool 100 is in use.

[0161] As mentioned above, the finishing tool 100 as shown in figure 2 is battery powered by battery 106. The battery 106 as shown in figure 2 is mounted to the tool head 108.

[0162] The battery 106 is mounted on a first side of the tool head 108. And the handle frame 104 is mounted on another side of the tool head 108. As shown in figure 2, the battery 106 is mounted on an opposite side of the tool head 108 to the handle frame 104. Accordingly, this means that the battery 106 is balanced with the handle frame 104 about the rotor axis 124. The battery 106, as shown in figure 2, exerts a downward force, e.g. a battery force 144, about the rotor axis 124.

[0163] Similarly, the weight of the handle frame 104 exerts a handle force 146 about the rotor axis 124. The battery centre of gravity 270 is positioned at a distance 256, i.e. a battery centre of gravity distance 256 from the rotor axis 124. The handle centre of gravity 272 is positioned at a handle centre of gravity distance 258 from the rotor axis 124. In some examples, the battery force 144 about the rotor axis 124 balances the handle force 146 about the rotor axis 124. In some examples, the battery force 114 and the handle force 146 are not equal. Accordingly, the arrangement means that the battery force 114 opposed to the handle force 146 reduces the overall resultant force between the battery force 114 and the handle force 146. This makes for a balanced finishing tool 100 and the user can more easily manoeuvre the finishing tool 100 over the surface 282.

[0164] The handle centre of gravity 272 is shown in figure 2 with the handle frame 104 fully extended and not folded. The foldable handle 102 and the foldable handle frame 104 will be discussed in further detail below.As mentioned above, the battery 106 is mounted to the exterior of the toolhead 108 along a battery axis 250 as shown in figure 2. The battery axis 250 is the direction along which the battery 106 extends when mounted to the tool head 108. The battery axis 250 is inclined with respect to the rotor axis 124 and the battery axis 250 is inclined by a battery inclination angle 252. In some examples, the battery inclination angle 252 is at an angle between 5 degrees to 45 degrees. As shown in figure 2, the battery 106 is inclined in a direction towards the handle 102. This means that when the user is gripping the handle 102, the battery 106 slides out from engagement with the tool head 108 in a direction towards the handle 102, e.g. towards the user. Furthermore, by inclining the battery axis 250 by the battery inclination angle 252, the battery centre of gravity 270 can be arranged closer to the rotor axis 124 and at the same time the tool housing 118 does not block the path of the battery 106 when being replaced on the battery connector 110.

[0165] Since the battery axis 250 is inclined by the battery inclination angle 252 with respect to the rotor axis 124, the attachment mechanism not shown aligned along an attachment plane is also inclined with respect to the rotor axis 124. The attachment plane of the battery 106 is parallel to the battery axis 250.

[0166] The finishing tool 100 will be discussed in further detail to figure 3 as well. Figure 3 shows the relative positions of the rotor axis 124 and the motor axis 122 as mentioned above. The motor axis 122 is set at a position from the rotor axis 124.

[0167] The motor axis 122 is positioned by a distance of the axis offset 126 from the rotor axis 124. The axis offset 126 is smaller than the battery centre of gravity distance 256 and the handle centre of gravity distance 258. This means that the moment due to the motor 120 is reduced because the motor 120 is closer to the rotor axis 124. By offsetting the motor axis 122 from the rotor axis 124, the battery 106 can be inclined with respect to the rotor axis 124 and allow the direction of the battery 106 to be pushed in and pulled out of connection with the battery connector 110 to be off vertical. At the same time the weight of the battery 106 can be balanced with the weight of the handle 102 and the motor 120.

[0168] The orientation of the battery 106 with respect to the tool head 108 allows the user to attach or detach the battery 106 from the tool head 108 whilst handling the finishing tool 100 in a deactivated state and the battery 106 does not collide with the tool housing 118. Indeed, the battery axis 250 is offset from the rotor axis 124. The battery axis 250 is offset from the rotor axis 124 by a lateral displacement in a direction perpendicular to the rotor axis 124. Furthermore, as shown in figure 2, the rotor axis 124 is between the motor axis 122 and the battery centre of gravity 270. The motor axis 122 furthermore is closer to the rotor axis 124 than the battery centre of gravity 270. Furthermore the battery centre of gravity 270 is offset from the rotor axis 124 by a lateral displacement in a direction perpendicular to the rotor axis 124. This means that the user does not have to walk round to the front of the finishing tool 100 to replace the battery 106. Instead, the user can replace the battery 106 whilst behind the tool head 108.In order to make the finishing tool 100 easier to transport and handle 102, the handle frame 104 is foldable. The foldable handle frame 104 is movable between an extended configuration and a folded configuration. Accordingly, the handle 102 as well is movable between the extended configuration and the foldable configuration. The reference will be made to figures 10a and 10b to further describe the foldable handle 102 and the foldable handle frame 104. Figures 10a and 10b show the finishing tool 100 with the foldable handle frame 104 in different positions. Figures Wa show a side view of the finishing tool 100 with the foldable handle frame 104 in an intermediate position between a fully extended position, as shown in figure 1, and a folded position as shown in figure 10b.

[0169] The handle 102 is the portion of the finishing tool 100 that the user grips. The handle frame 104 is the connecting portion of the finishing tool 100 that connects the handle 102 to the tool head 108. The handle frame 104 comprises a plurality of handle frame portions 162, 164, 166. The handle frame 104 comprises a first handle frame portion 162 which is mounted to the tool head 108. Specifically, the first handle frame portion 162 is fixed with respect to the gearbox 312 or the tool head 108.

[0170] A second handle frame portion 164 is connected to the first handle frame portion 162. The second handle frame portion 164 is also connected to a third handle frame portion 166. Finally, the third handle frame portion 166 is connected to the handle 102 e.g. the handle crossbar portion 228.

[0171] The first handle frame portion 162 is mounted to the gearbox 312 or the tool head 108 at an angle to the rotor axis 124. This means that the handle frame 104 when in the extended position as shown in e.g. figure 1 is inclined to the rotor axis 124. The handle frame portions 162, 164, 166 are pivoted mounted to each otherso that they can be folded into a compact folded position e.g. as shown in figure 10b or Figure 18.

[0172] The second handle frame portion 164 is pivotally mounted to the first handle frame portion 162 at a first handle frame pivot 168. Accordingly, the second handle frame portion 164 pivots about the first handle frame pivot 168. Likewise, the third handle frame portion 166 is pivotally mounted to the second handle frame portion 164 at second handle frame pivot 170. Furthermore, the third handle frame portion 166 is pivotable about the second handle frame pivot 170. Finally, the third handle frame portion 166 comprises a third handle frame pivot 172. The handle 102 is pivotally mounted to the third handle frame portion 166 about third handle frame pivot 172.

[0173] The first handle frame portion 162 and the second handle frame portion 164 are selectively secured in the extended position or the secured position by a first pivot fastener 174. The first pivot fastener 174 may optionally be a screw threaded fastener that threads into both the first handle frame portion 162 and the second handle frame portion 164 and prevents relative movement there between. Similarly, the second handle frame portion 164 and the third handle frame portion 166 are selectively secured together by a second pivot fastener 176. Likewise, the third handle frame portion 166 and the handle 102 are selectively secured together by a third pivot fastener 178. The second pivot fastener 176 and the third pivot fastener 178 are similar to the first pivot fastener 174 and work in a similar way. Whilst the first, second and third pivot fasteners 174, 176, 178 are screw fasteners, in other examples any suitablemechanism can be used to secure the first, second and third handle frame portions 162, 164, 166 in place e.g. clips, clamps, locking pins etc.

[0174] When the foldable handle frame 104 is in the folded configuration, the second handle frame portion 164 and the third handle frame portion 166 fold adjacent to each other. This is shown in figure 10b. As can be shown in figure 10a, the second handle frame portion 164 folds towards the third handle frame portion 166 in the direction as shown by the arrow in figure 10a.

[0175] Furthermore, the handle 102 and the handle crossbar portion 228 fold in a direction as shown by the arrow in figure 10b such that the handle 102 and the handle crossbar portion 228 are adjacent to the first handle frame portion 162 Since the first handle frame portion 162 is inclined with respect to the tool head 108 the handle 102 can fit beneath the first handle frame portion 162 when in the folded configuration This means that all the handle frame portions 162,164, 166 in the folded configuration provide a compact arrangement. This means that transportation and storage of the finishing tool 100 is easier than if the handle 102 was permanently in an extended configuration.

[0176] When the handle frame 104 is in the folded configuration, at least a portion of the foldable handle frame 104 is adjacent to the tool housing 118. As shown in figure 10b, the second handle frame portion 164 is adjacent to the tool housing 118, when in the folded configuration. Whilst the figures show the handle frame 104 having three handle frame portions 162, 164, 166, in other examples there can be any suitable number of foldable handle frame portions, e.g. two handle frame portions, four handle frame portions, etc.

[0177] When the handle frame 104 is in the folded configuration, the foldable handle 102 and the foldable handle frame 104 are positioned within the perimeter defined by the blade guard 116. Accordingly, the footprint of the finishing tool 100, as shown in figure 10b, is optionally defined by the diameter of the blade guard 116. This means that the finishing tool 100 is compact and can be easily transported and handled on and between worksites. However, in other examples, the footprint may not be determined by the diameter of the blade guard 116.

[0178] Reference will now be made to Figure 18 which shows the finishing tool 100 in another folded configuration. The finishing tool 100 is the same as shown in Figure 10b except that the second handle frame pivot 170 and the third handle frame pivot 172 allow pivotal movementof the third handle frame portion 166 and the handle cross bar portion in an opposite direction to that compared in Figure 10b. This means that the first handle frame portion 162, the second handle frame portion 164 and the third handle frame portion 166 are adjacent to the tool head 108 in the folded configuration. In other words, the handle frame 104 is configured to wrap around the tool head 108 in the folded configuration. In some examples, the first handle frame pivot 168, the second handle frame pivot 170, and / or the third handle frame pivot 172 allow pivotal movement of the handle frame portions between 90 degrees to 180 degrees. In other examples, the pivotal movement of the handle frame portions permitted by the first handle frame pivot 168, the second handle frame pivot 170, and / or the third handle frame pivot 172 may be between 0 to 360 degrees. In other words, the first handle frame pivot 168, the second handle frame pivot 170, and / or the third handleframe pivot 172 permit pivotal movement of the handle frame portions such that the handle frame 104 can provide a folded configuration shown in either Figure 10b or Figure 18.

[0179] As mentioned above, the rotor 112 comprises a plurality of rotor blades 114. Each rotor blade 114 is rotatable about a blade pivot axis 134 (best shown in Figure 3). This means, as mentioned above, the angle of the rotor blades 114 can be adjusted with respect to the surface 282. The angle of inclination of the rotor blades 114 about the blade pivot axis 134 is adjusted using a pressure plate mechanism 132. The pressure plate mechanism 132 is operatively coupled to the rotor blades 114 as discussed below. The pressure plate mechanism 132 is in turn operatively coupled to a pressure plate adjustment mechanism 206. The pressure plate adjustment mechanism 206 is shown in figure 2 and is mounted to the handle frame 104.

[0180] Accordingly, adjustment of the pressure plate adjustment mechanism 206 causes movement of the pressure plate mechanism 132 and in turn pivotal movement of the rotor blades 114 about the blade pivot axis 134. The pressure plate adjustment mechanism 206 will be discussed in further detail below.

[0181] The pressure plate adjustment mechanism 206 is mechanically connected to the pressure plate mechanism 132 via a pressure plate cable 136. The pressure plate adjustment mechanism 206 is arranged to move with respect to the handle frame 104 and is attached to the pressure plate cable 136 at attachment point 222 on the pressure plate adjustment mechanism 206. Accordingly, when the pressure plate adjustment mechanism 206 moves, the end of the pressure plate cable 136 also moves. The pressure plate cable 136 is routed along the underside of the handle frame 104 by a plurality of cable pulleys 224, 226.

[0182] A first cable pulley 224 is mounted to the first handle frame portion 162 and a second cable pulley 226 is mounted to the third handle frame portion 166. The pressure plate cable 136 engages the first cable pulley 224 and the second cable pulley 226 and permits the pressure plate cable 136 to freely move when the pressure plate adjustment mechanism 206 is moved. The pressure plate cable 136 is coupled to a pressure plate lever 230 as shown in Figure 3. The pressure plate lever 230 is configured to pivot when the pressure plate cable 136 is pulled and the pressure plate adjustment mechanism 206 moves. This in turn engages a moveable pressure plate 232. The moveable pressure plate 232 is annular and mounted around the rotor axis 124 and is configured to move in a direction parallel with the rotor axis 124 when the pressure plate lever 230 pivots.

[0183] Whilst the examples are shown in the figures, e.g. figure 2, show a first cable pulley 224 and a second cable pulley 226, there can be any number of cable pulleys arranged to route the pressure plate cable 136 from the pressure plate adjustment mechanism 206 to the pressure plate mechanism 132. Furthermore, in some alternative examples, whilst the examples show a pressure plate cable 136 operatively coupling the pressure plate adjustment mechanism 206 to the pressure plate mechanism 132, any other mechanical coupling can be used. For example, a mechanical linkage, movable rods, a Bowden cable or any other suitable mechanical means can be used. The pressure plate cable 136 is mounted on the underside of the handle frame 104, shown in figure 2. That is, the first cable pulley 224and the second cable pulley 226 are mounted on a side of the handle frame 104, when the handle frame 104 and the handle 102 are in an extended configuration and face the surface 282 to be finished.

[0184] Furthermore, as shown in figures 10a and 10b, the first handle frame portion 162, the second handle frame portion 164 and the third handle frame portion 166 fold together such that the first cable pulley 224 and the second cable pulley 226 move towards each other when the handle frame 104 moves into the folded configuration. This means that the pressure plate adjustment mechanism 206 and the pressure plate mechanism 132 are always connected by the pressure plate cable 136 regardless of the configuration of the handle frame 104, e.g. either the folded configuration and intermediate configuration or the extended configuration. Since the second handle frame portion 164 and the third handle frame portion 166 fold together such that they are adjacent, the pressure plate cable 136 is also protected between the second handle frame portion 164 and the third handle frame portion 166 when in the folded configuration. This means that the pressure plate adjustment mechanism 206 and the pressure plate cable 136 are protected in the folded configuration and reduce the chance of the finishing tool 100 being damaged during transportation.

[0185] Figure 2 also shows a speed controller 180 mounted to the handle 102. The speed controller 180 is configured to be connected to the motor 120 and send a signal for adjusting the speed of the motor 120. The motor 120 is connected to a controller 154 or controller module (hereinafter referred to as a controller 154). The controller 154 is arranged to issue control instructions to the motor 120 for controlling the speed and operation of the motor 120. Furthermore, the speed controller 180 mounted on the handle 102 is also connected to the controller 154.

[0186] Accordingly, the controller 154 issues control instructions to the motor 120 relating to the speed of the motor 120 in dependence of signals received from the speed controller 180. In some examples, the speed controller 180 is connected to the controller 154 via a wired connection. The wired connection can be routed along the handle frame 104 similar to the pressure plate cable 136. Alternatively, the wired connection between the speed controller 180 and the controller 154 can be routed within the handle frame 104. In other examples, the speed controller 180 can be in wireless communication with the controller 154 using a wireless protocol e.g. Bluetooth, ZigBee or any other suitable wireless protocol.

[0187] The controller 154 is mounted within the tool housing 118 and will be discussed in further detail with reference to e.g. figure 6. Similar to the pressure plate cable 136, the speed controller 180 remains connected to the controller 154 and the motor 120 irrespective of the configuration of the handle frame 104. E.g. the speed controller 180 is connected in the folded configuration and the extended configuration of the handle frame 104. This means that the finishing tool 100 requires minimal configuration and setup when being transported between worksites. Furthermore, on first use the user does not need to connect parts of the finishing tool 100 together since the handle frame 104 and the various components are always connected together. E.g. the user on first use of the finishing tool 100 simply has to unfold the foldable handle 102 and the foldable handle frame 104 to configure the finishing tool 100 into an operative configuration for use.The handle frame 104 is arranged to be permanently connected to the tool head 108. Whilst the handle frame 104 comprises the first handle frame portion 162, the second handle frame portion 164 and the third handle frame portion 166, which are movable with respect to each other, e.g. pivotable between the folded configuration and the extended configuration, the handle frame portions 162, 164, 166 are not removable from the tool housing 118. This makes installation and use of the finishing tool 100 easier. The user is therefore less likely to incorrectly assemble the finishing tool 100.

[0188] As mentioned above, the controller 154 is mounted within the tool housing 118. In order for the controller 154 to operate within optimal parameters, the controller 154 is cooled during operation. The cooling of the tool head 108 will now be discussed in further detail with reference to the figures 6 and 7. Figure 6 shows a cross-sectional view of the tool head 108, and figure 7 shows a perspective view of part of the tool head 108, with part of the tool housing 118 removed. The tool head 108 comprises a motor fan assembly, wherein the motor 120 is coupled to a fan 160. The fan 160 together with the motor 120 is configured to generate a first airflow along a first airflow path 156 between at least one housing air inlet 128 and at least one housing air outlet 130. The first airflow path 156, as shown in figure 6, extends from the housing air inlet 128 past the controller 154 into the fan 160 along the side of the motor 120 and out of the housing air outlet 130.

[0189] The motor 120 as shown in figure 6 comprises a motor drive shaft 284 which extends along the motor axis 122. The motor drive shaft 284 is coupled to the fan 160 at a first shaft end 286. A second shaft end 288 opposite the first shaft end 286 is coupled to the gearing 142. The gearing 142 is operatively connected to the rotor 112 via additional gears (not shown). This means when the motor 120 is actuated the fan 160 generates an airflow along the first airflow path 156. Accordingly, the motor fan assembly generates an active cooling airflow along the first airflow path 156 during operation of the finishing tool 100. Furthermore, the active cooling along the first airflow path 156 is generated when the rotor 112 is in operation.

[0190] The tool housing 118 comprises a plurality of housing air inlets 128. The plurality of air inlets 128 are arranged on the sides of the tool head 108. This means that water is less likely to ingress into the tool head 108 via the air inlets 128 which prevents damage to the internal components. The housing air inlets 128 are optionally circumferentially arranged around the tool housing 118. In other examples the housing air inlets 128 are distributed partially around the tool housing 118 or may be positioned in another pattern which is not circumferential. Alternatively, the housing air inlets 128 are arranged on opposite sides of the tool housing 118. This means that the cooling air along the first airflow path 156 is received from all directions around the tool head 108. Similarly, the tool housing 118 comprises a plurality of housing air outlets 130 around the tool housing 118. Indeed, the housing air outlets 130 are circumferentially spaced around the tool housing 118. Likewise, alternatively, the housing air outlets 130 are arranged on opposite sides of the tool housing 118. Similarly, the air exhaust from the first airflow path 156 at the housing air outlets 130 is in all directions around the tool head 108.The controller 154 is shown mounted at the top of the tool housing 118 in figure 6. The controller 154 is mounted on a controller PCB 262. The components of the controller 154, e.g. integrated circuits and other electronic components are mounted on a controller PCB first side 264. The controller PCB first side 264 faces a fan baffle cover 150. The fan baffle cover 150 is a cap portion of the tool housing 118 that covers and protects the controller PCB 262. A thermally conductive element, such as one or more heatsinks 152, is mounted to the controller PCB 262 on a controller PCB second side 266. In some examples the heatsink 152 is a plurality of cooling ribs 152, but in other examples the heatsink 152 can have any suitable shape or size in order to dissipate heat. The heatsink 152 can also be a plurality of heatsinks 152. Accordingly, heat from the controller 154 is radiated away from the controller PCB 262 via the heatsink 152.

[0191] In some examples the controller 154 may be potted to protect the controller 154 on the other electronic components from the external environment. The heatsink 152 is configured to radiate heat generated by the controller 154 away from the controller 154 as shown in figure 6. In some examples the heatsink 152 is aligned along the first airflow path 156. Indeed, as shown in figure 6 the heatsink 152 is placed upstream of the fan 160 along the first airflow path 156. However, in other examples the heatsink 152 can be placed downstream of the fan 160. In this way the active cooling generated by the fan 160 draws heat away from the heatsink 152.

[0192] The motor 120 is mounted within a motor housing 260. The motor housing 260 is mounted to the gearbox 312 and the tool housing 118 is optionally mounted on the motor housing 260. However, the motor housing 260 is sealed from the outside environment. This means that moisture and other dirt and debris cannot pass into the motor housing 260.

[0193] The first airflow path 156 extends over the motor housing 260. The tool housing 118 comprises a fan baffle 268 which extends downwardly in a direction away from the housing air inlets 128. Accordingly, the fan baffle 268 provides a shroud around the motor housing 260 and defines an annular conduit around the motor housing 260. The first airflow path 156 extends between the fan baffle 268 and the motor housing 260. The fan baffle 268 is arranged to guide the airflow along the first airflow path 156 in a direction towards the housing air outlets 130. Specifically, the first airflow path 156 passes over a motor housing wall 290 of the motor housing 260. In this way the airflow along the first airflow path 156 also removes heat radiated by the motor housing wall 290.

[0194] The motor 120 comprises a second airflow along a second airflow path 158. The second airflow path 158 is arranged to cool the motor fan assembly and the motor 120. The second airflow along the second airflow path 158 is isolated from the first airflow along the first airflow path 156. The first airflow path 156 is separated from the second airflow path 158 because the motor housing 260 is sealed., The second airflow path 158 is caused via a rotating agitator 330 mounted inside the motor housing 260 and operatively coupled to the motor 120. The rotating agitator 330 rotates when the motor 120 is operational. In some examples, the rotating agitator 330 can be a fan, but in other examples the rotating agitator 330 can be any suitable structure that moves air within the motor housing 260 when it rotates. This causes an active air flow within the motor housing 260. This means that heat transfer occurs at the motor housing wall 290 between the second airflow and the first airflow. As shown in Figure 6, the second airflow path 158is circular within the motor housing 260 from an interior portion of the motor housing 260 remote from the motor housing wall 290 to an outer portion of the motor housing 260 adjacent to the motor housing wall 290. Heat generated by the motor 120 in motor housing 260 during operation of the motor 120 is dissipated at the motor housing wall 290 from the second air flow to the first air flow based on the based on the counterflow heat exchange principle.

[0195] The first airflow path 156 is adjacent to a first side of a motor housing wall 290 and at least a portion of the second airflow path 158 is adjacent to a second side of the motor housing wall 290. Accordingly, heat generated by the motor 120 is transferred by the second airflow path 158, transmitted through the motor housing wall 290 and transferred away by the first airflow path 156 that passes over the outside of the motor housing wall 290. In some examples the motor housing 260 is sealed from the outside environment. However, in other examples the motor housing 260 may not be sealed from the outside environment. In this alternative example the second airflow path 158 and the airflow along the second airflow path 158 may also be an active cooling airflow. However, it is preferable to seal the motor housing 260 to prevent dirt and moisture from the work site contaminating the motor 120.

[0196] When in use, the housing air outlets 130 are closer to the rotor 112 than the housing air inlet 128. This means that the housing air outlet 130 is closer to the surface 282 to be finished. This means that dirt and debris is blown away from the tool head 108 and the air, housing air inlet 128 by the exhaust air from the housing air outlet 130. This means that dirt and debris are less likely to be sucked into the housing air inlet 128. As shown in figure 6, the first airflow path 156 is arranged adjacent to the housing airflow inlet 128 in a direction perpendicular to the motor axis 122. Conversely, the first airflow path 156 is arranged in a direction substantially parallel to the motor axis 122 at the housing air outlet 130.

[0197] The examples discussed with reference to figure 6 show the tool head 108 of the finishing tool 100 with a first airflow path 156 from a housing air inlet 128 to a housing air outlet 130. However, in some examples the rotor 112 can be operated in two directions, e.g. a clockwise direction and a counterclockwise direction. Accordingly, the fan 160 in some examples can be reversed in its rotational direction, as shown in figure 6. Even if the fan 160 reverses rotational direction, the direction of the air along the first airflow path 156 is the same. . In this case, the reversed fan direction will still cool the motor 120 and controller 154.

[0198] The controller 154 as mentioned above is mounted on a controller PCB 262. In some examples the controller PCB 262 is attached to a controller bracket 294 to the tool housing 118. The controller bracket 294 is coupled to the controller PCB 262 such that the interior space of the tool housing 118 is divided into different sections e.g. a first housing volume 298 and a second housing volume 300. That is, the airflow along the first airflow path 156 is separated from the volume of space which contains the controller 154 and the controller PCB first side 264. This means that the controller 154 and other components are separated from the airflow along the first airflow path 156 and this limits the amount of dirt and debris that can contaminate the electronics and the controller 154. This means that wiring connected to the controller 154 and the controller PCB 262 do not need to be routed through the tool housing 118 along the first airflow path 156.Indeed, the tool housing 118 in the second housing volume 300 comprises at least one wire hole 302 arranged to receive one or more wires connected to the controller 154. This means that the wires do not need to be routed through the first housing volume 298. The wire hole 302 can also be sealed once a wire is threaded through the wire hole 302 and connected to the controller 154.

[0199] The controller bracket 294 acts as a barrier and separates the tool housing 118 into a first housing volume 298 and a second housing volume 300. The first housing volume 298 is separated from the second housing volume 300 and in some examples is sealed there from. For example, the first housing volume 298 is not in fluid communication with the second housing volume 300. This means that the first airflow path 156 is located within the first housing volume 298 and the controller 154 is located within the second housing volume 300. Accordingly, the first airflow path 156 does not direct airflow into the second housing volume 300. This further protects the controller 154 from ingress of dirt and moisture whilst still being cooled via the heatsinks and the airflow along the first airflow path 156.

[0200] In some examples the controller bracket 294 seals against an internal feature or wall of the tool housing 118 and creates the sealed barrier between the first housing volume 298 and the second housing volume 300.

[0201] As mentioned above, the rotor blades 114 are pivotable about a blade pivot axis 134. This can be seen from figure 5. Figure 5 shows a perspective view of the tool head 108. The mechanism for adjusting the angle of the rotor blades 114 about the blade pivot axis 134 will now be discussed in more detail. As mentioned above, the angle of the rotor blades 114 is adjusted with the pressure plate mechanism 132. The pressure plate 232 is in engagement with each of the rotor blades 114. Each rotor blade 114 is fastened to a blade rod 138 which is connected to a rotor shaft 292. The rotor shaft 292 rotates about the rotor axis 124 and when the rotor shaft 292 rotates, the blade rod 138 also rotates about the rotor axis 124. The rotor blade 114 is connected to the blade rod 138 via blade rod mounting 140.

[0202] The rotor shaft 292 is operatively coupled to the motor drive shaft 284 via the gearing 142. The rotor blade 114 can be fastened to the blade rod 138 via a fastener or any other suitable means. The blade rod 138 extends along the blade pivot axis 134 and is rotatably mounted about the blade pivot axis 134. That is, both the blade rod 138 and the rotor blade 114 rotate about the blade pivot axis 134.

[0203] A rotor blade pivot arm 234 is connected to the blade rod 138 and the rotor blade pivot arm 234 is in mechanical engagement with the pressure plate 232. When the pressure plate 232 is arranged to move in a direction parallel with the rotor axis 124, when the pressure plate 232 moves in a direction parallel with the rotor axis 124, the pressure plate 232 exerts a force on the rotor blade pivot arm 234. Accordingly, the rotor blade pivot arm 234 causes the blade rod 138 and the rotor blade 114 to pivot about the blade pivot axis 134. The user is able to adjust the pressure plate 232 along the rotor axis 124 via the pressure plate adjustment mechanism 206.The pressure plate adjustment mechanism 206 will now be discussed in further detail with reference to figures 12a, 12b, 12c, 13a and 13b. Figures 12a to 13b show various examples of a pressure plate adjustment mechanism 206.

[0204] The pressure plate adjustment mechanism 206 as shown in figure 12a comprises a coarse blade angle adjustment mechanism 274 and a fine blade angle adjustment mechanism 276. The coarse blade angle adjustment mechanism 274 is arranged to move the rotor blade 114 over a large angle for a given movement of the pressure plate adjustment mechanism 206. Conversely, the fine blade angle adjustment mechanism 276 is arranged to move the rotor blade 114 over a small angle for a given movement of the pressure plate adjustment mechanism 206. In other words, the user can adjust the angle of the rotor blade 114 through a larger angle than compared with the coarse blade angle adjustment mechanism 274 when compared with the fine blade angle adjustment mechanism 276. This means the user can more quickly adjust the angle of the rotor blade 114 with the coarse blade angle adjustment mechanism 274. At the same time, the user can precisely move the rotor blade 114 to the correct blade angle using the fine blade angle adjustment mechanism 276.

[0205] The pressure plate adjustment mechanism 206 is moveably mounted to the handle frame 104. Accordingly, movement of the pressure plate adjustment mechanism 206 causes movement of the pressure plate cable 136 and movement of the pressure plate 232 itself which adjusts the angle of the rotor blades 114. The pressure plate adjustment mechanism 206 as shown in figures 12a, 12b, 12c and 13a is pivotally mounted on the handle frame 104. Accordingly, pivotal movement about a pressure plate actuator pivot 220 causes movement of the pressure plate cable 136. Alternatively, the pressure plate adjustment mechanism 206 can be slidably mounted with respect to the handle frame 104 e.g. as shown in figure 13b. Accordingly, the pressure plate adjustment mechanism 206 can either cause movement of the pressure plate cable 136 via rotational or linear movement of the pressure plate adjustment mechanism 206.

[0206] The pressure plate adjustment mechanism 206 comprises the coarse blade angle adjustment mechanism 274 which is coupled to the fine blade angle adjustment mechanism 276. Accordingly, actuation of either the coarse blade angle adjustment mechanism 274 or the fine blade angle adjustment mechanism 276 causes movement of the pressure plate cable 136.

[0207] The pressure plate adjustment mechanism 206 is mounted to the handle frame 104 via an adjustment mechanism bracket 296. The adjustment mechanism bracket 296 can be fastened to the handle frame 104 via a fastener or any other suitable fastening means. The adjustment mechanism bracket 296 is therefore fixed with respect to the handle frame 104.

[0208] The pressure plate adjustment mechanism 206 comprises a coarse adjustment lever 208. The coarse adjustment lever 208 can be connected to a handle (not shown). The coarse adjustment lever 208 is therefore pivoted about the pressure plate actuator pivot 220 by the user to make a large adjustment to the rotor blade 114 with the coarse blade angle adjustment mechanism 274.The pressure plate adjustment mechanism 206, also comprises the fine blade angle adjustment mechanism 276. As shown in figures 12a, 12b and 12c, the fine blade angle adjustment mechanism 276 is engaged with the adjustment mechanism bracket 296. Indeed, the fine blade angle adjustment mechanism 276 comprises a first adjustment gear 216, which is rotatable about a fine adjustment axis 214. The first adjustment gear 216 can be actuated via a fine adjustment knob 212 by the user. For example, the user twists the fine adjustment knob 212 to cause the first adjustment gear 216 to rotate. The first adjustment gear 216 is configured to operatively engage with a second adjustment gear 218.

[0209] The second adjustment gear 218 is fixed with respect to the handle frame 104. Accordingly, when the first adjustment gear 216 is rotated, the coarse adjustment lever 208 pivots about pressure plate actuator pivot 220, which causes the cable attachment point 222 to move and also the pressure plate cable 136 to move. The second adjustment gear 218, as shown in figures 12a, 12b, 12c, is positioned along a periphery of a curved edge of the adjustment mechanism bracket 296. However, in other examples, the second adjustment gear 218 can be arranged linearly, e.g. a rack with teeth as shown in figure 13b. The first adjustment gear 216, in some examples, is a worm gear. This advantageously means that when the first adjustment gear 216 is in engagement with the second adjustment gear 218, the pressure plate adjustment mechanism 206 remains fixed in position due to the friction caused by the worm gear.

[0210] When the first adjustment gear 216 is in engagement with the second adjustment gear 218, the coarse adjustment lever 208 and the coarse blade angle adjustment mechanism 274 cannot be moved. In order to move the coarse adjustment lever 208, the first adjustment gear 216 must be disengaged from the second adjustment gear 218. As shown in figure 12a, an engagement mechanism can be selectively engaged with a shift lever 210. The shift lever 210 is connected to the first adjustment gear 216 and causes the first adjustment gear 216 to move towards or away from the second adjustment gear 218. Accordingly, in order to move the coarse adjustment lever 208, the user pulls the shift lever 210 upwards. The first adjustment gear 216 is disengaged and the user pivots the coarse adjustment lever 208 about the pressure plate actuator pivot 220 as previously discussed.

[0211] In some examples the shift lever 210 is coupled to the adjustment mechanism bracket 296 via a spring. Accordingly, the shift lever 210 is urged towards the adjustment mechanism bracket 296 by the spring not shown. Accordingly, the first adjustment gear 216 of the fine blade angle adjustment mechanism 276 is urged towards the second adjustment gear 218. This means that the fine blade angle adjustment mechanism 276 is biased towards the engaged position and the angle of the rotor blade 114 is more easily maintained during operation.

[0212] Reference will now be made to Figures 19 and 20 which shows an alternative example of the pressure plate adjustment mechanism 206. The pressure plate adjustment mechanism 206 as shown in Figure 19 comprises a coarse adjustment lever 208 and a fine adjustment knob 212, similar to the arrangement as shown in Figures 12a to 12c and 13a, 13b. Accordingly, the user can adjust the angle of the rotor blade 114 through a larger angle with thecoarse blade angle adjustment mechanism 274 when compared with the fine blade angle adjustment mechanism 276.

[0213] The coarse blade angle adjustment mechanism 274 comprises a coarse adjustment lever 208 that pivots about the pressure plate actuator pivot 220 similar to that previously discussed in reference to the Figures 12a to 12c and 13a, 13b. In contrast, the coarse adjustment lever 208 in Figure 19 comprises a ratchet 314 selectively engageable with a pawl 316. The ratchet 314 and the pawl 316 define a plurality of different positions for the coarse adjustment lever 208 corresponding to different angles of the rotor blades 114. The pawl 316 is released from the ratchet 314 via a pawl release button 318. The pawl release button 318 is operatively coupled to the pawl 316 via a release rod 320. When the pawl release button 318 is depressed, the release rod 320 moves towards the pawl 316. The pawl 316 then pivots about a pawl pivot 322 which disengages a pawl tool portion 324 from the ratchet 314. The shape of the teeth of the ratchet 314 and the pawl 316 optionally caused the coarse adjustment lever 208 to be pivotable in one direction (e.g. anticlockwise as shown in Figure 19). The coarse adjustment lever 208 is moveable in a clockwise direction when the pawl release button 318 is depressed. In some other examples, the coarse adjustment lever 208 may still be moveable if the user exerts sufficient force (e.g. the shape of the teeth of both the ratchet 316 and the pawl 316 permit two way movement even when engaged with each other).

[0214] When the coarse adjustment lever 208 is moved, the position of the cable attachment point 222 is moved, which causes the pressure plate cable 136 to move and pivot the rotor blades 114.

[0215] The fine blade angle adjustment mechanism 276 comprises a fine adjustment knob 212. The fine adjustment knob 212 is fixed to a threaded adjustment rod 326. The threaded adjustment rod 326 is threadedly engaged with a reciprocal threaded bore in a pulley carriage 328. The second cable pulley 226 is mounted on the pulley carriage 328. The pulley carriage 328 is moveable in a direction along the fine adjustment axis 214. The fine adjustment axis 214 is coaxial with the longitudinal axis of the threaded adjustment rod 326. When the fine adjustment knob 212 is rotated, this causes linear movement of the pulley carriage 328 and the second cable pulley 226 in a direction parallel with the fine adjustment axis 214. Since the second cable pulley 226 moves when the fine adjustment knob 212 is rotated, the cable 136 moves and causes a change in angle in the rotor blades 114. Although not shown in Figure 19, the pressure plate adjustment mechanism 206 is mounted to the handle frame 104 similar to that shown in the previous Figures.

[0216] Figure 20 is the same as shown in Figure 19 except that the pulley carriage 328 is fixed with respect to the coarse adjustment lever 208 and not connected to the second cable pulley 226. Instead, the second cable pulley 226 is fixed with respect to the handle frame 104. Instead, the coarse adjustment lever 208 and the pressure plate actuator pivot 220 move at the same time as when the fine adjustment knob 212 moves the pulley carriage 328.

[0217] Whilst reference in Figures 19 and 20 has been made to a pawl release button 318, in other examples any other suitable mechanism can be used to release the pawl 316 e.g. a lever (not shown) that the user pulls up.Another example of the finishing tool 100 will now be discussed in reference to figure 15 and figures 16a and 16b. Figure 15 shows a side view of the finishing tool 100 with at least one transportation wheel 236. Figures 16a and 16b show the finishing tool 100 with the transportation wheel 236 in a deployed position.

[0218] The transportation wheel 236, as shown in figure 15, is in a retracted position. The at least one transportation wheel 236 is moveable between a deployed position (as shown in Figures 16a and 16b) and a retracted position (as shown Figure 15). When the at least one transportation wheel 236 is in the deployed position, the transportation wheel 236 is engageable with the surface 282 that is to be worked or the ground for transportation to the work surface. Although figures 15, 16a and 16b show a side view of the finishing tool 100, and a transportation wheel 236 visible. However in some examples there can be a plurality of transportation wheels 236. For example, there can be a first transportation wheel 236 and a second transportation wheel (not shown). The first transportation wheel 236 and the second transportation wheel can be positioned either side of the handle frame 104. Alternatively, in a less preferred example, the finishing tool 100 comprises a single transportation wheel 236.

[0219] When the transportation wheel 236 is in the deployed position, the user can pivot the finishing tool 100 about the transportation wheel 236 to lift up the tool head 108 and the rotor blades 114 away from the surface 282. Accordingly, as shown in Figure 16b, the weight of the finishing tool 100 is supported by the transportation wheel 236 and the user can push the finishing tool 100 to the surface 282 to be finished without the blades, rotor blades 114 engaging the surface 282. When referring to Figures 16a and 16b, the user pushes down on the handle 102 towards the surface 282 which pivots the finishing tool 100 about the transportation wheel 236.

[0220] The transportation wheel 236, as shown in figure 16, is aligned underneath the handle frame 104. In some examples, the transportation wheel 236, when in the deployed position and positioned over the surface 282, is closer to a handle centre of gravity 272 than the battery centre of gravity 270. Accordingly, this means that the moment of the tool head 108 about the transportation wheel 236 is greater than the moment of the handle 102 about the transportation wheel 236. Accordingly, when the user pushes down on the handle 102 to lift the tool head 108 up, as shown in figure 16b, if the user lets go of the handle 102, the tool head 108 will pivot about the transportation wheel 236 back towards the surface 282. This means that the finishing tool 100 is less likely to overturn when the user pushes down on the handle 102.

[0221] The transportation wheel 236 is mounted on a foldable wheel leg 238 that projects from the tool head 108. The foldable wheel leg 238 is mounted to a transport wheel bracket 248 at a wheel leg pivot 240. The at least one transportation wheel 236 as shown in figures 15, 16a, 16b is movable between the deployed position and retracted position by pivoting the foldable wheel leg 238 from the retracted position to the deployed position. However, in other examples, the foldable wheel leg 238 can be retracted and extended using other movement, e.g. the foldable wheel leg 238 can slide between the deployed position and the retracted position.The transport wheel bracket 248 is mounted to the blade guard 116. When the transportation wheel 236 is in the deployed position, the transportation wheel 236 projects beyond the perimeter of the blade guard 116. When the transportation wheel 236 is in the retracted position, the transportation wheel 236 is positioned within the perimeter of the blade guard 116. This means that the transportation wheel 236 does not interfere with the operation of the finishing tool 100 when the rotor blades 114 are in operation, e.g. the transportation wheel 236 does not engage the surface 282 when in the retracted position to the blade guard 116. Furthermore, as shown in figure 15, the transportation wheel 236 is raised above the surface 282 when in the retracted position or at the same level as the surface 282.

[0222] Whilst figure 15 shows the transport wheel bracket 248 fixed to the blade guard 116, in other examples the transport wheel bracket 248 can be fixed to anotherpartof the tool head 108, for example the gearbox 312 or the handle frame 104.

[0223] The transportation wheel 236 is pivotable from the retracted position as shown in figure 15 about the wheel leg pivot 240 to the deployed position in the direction as shown by the arrow in figure 15.

[0224] The transportation wheel 236 is securable in the retracted position and the deployed position with a wheel locking mechanism 280. The wheel locking mechanism 280 comprises wheel leg securing pin 242 engageable with at least one reciprocal hole in the transport wheel bracket 248 and the foldable wheel leg 238. The wheel leg securing pin 242 aligns with a first wheel securing hole 244 in the transport wheel bracket 248 and a second wheel securing hole 246 also in the transport wheel bracket 248. The first wheel securing hole 244 aligns with a hole in the foldable wheel leg 238 when the transportation wheel 236 is in the deployed position. The second wheel securing hole 246 aligns with a hole in the foldable wheel leg 238 when the transportation wheel 236 is in the retracted position. Accordingly, the wheel leg securing pin 242 extends through the transport wheel bracket 248 and into the foldable wheel leg 238 to secure the position of the transportation wheel 236 in either the deployed position or the retracted position.

[0225] The wheel locking mechanism 280 configured to secure the transportation wheel 236 in the retracted position or the deployed position can be any suitable mechanism for securing the transportation wheel 236. For example, alternatively the wheel locking mechanism 280 can be a wing nut and bolt for securing the foldable wheel leg 238 in place.

[0226] The transportation wheel 236 is mounted on the tool head 108 on the same side of the finishing tool 100 as the handle 102. This means that the user is better able to lift the tool head 108 up from the surface 282. This is because the weight of the tool head 108 and the handle 102 are either side of the transportation wheel 236, which acts as a fulcrum. When the transportation wheel 236 is in the retracted position, the transportation wheel 236 overlaps with the handle frame 104 and specifically the first handle frame portion 162. If there are a plurality of transportation wheels 236, the transportation wheels 236 are positioned either side of the first handle frame portion 162, when the transportation wheels 236 are in the retracted position.As mentioned above, the battery 106 is mounted via battery connector 110 to the gearbox 312 or the tool head 108. The battery connector 110 is also inclined towards the transportation wheel 236 as shown in Figure 15. This means that the battery 106 is also inclined to the transportation wheel 236 and the handle 102 when the battery 106 is mounted to the tool head 108. The user can move the battery 106 closer within reach when the user is gripping the handle 102. Furthermore, the folded up position of the transportation wheel 236 is advantageous because the centre of gravity moves closer to the rotor axis 124 which makes the finishing tool 100 easier to manoeuvre.

[0227] Another example of the finishing tool 100 will now be described in reference to figures 11a, 11b, 11c and 11d.

[0228] Figures 11a and 11b show a close-up view of the finishing tool 100 with a utility arm 202 when the handle frame 104 is in an extended configuration. Figures 11c and 11d show the finishing tool 100 with the utility arm 202 when the handle frame 104 is in a folded configuration.

[0229] As shown in figures 11a to 11 d, the utility arm 202 is movable between a plurality of different positions. The different positions of the utility arm 202 allow the utility arm 202 to perform different functions for the finishing tool 100, which will be discussed below.

[0230] The utility arm 202 is pivotally mounted to the tool head 108 via a utility arm pivot 204. The utility arm 202 is mounted to the tool head 108 via a utility arm bracket 304. The utility arm bracket 304 is fixed with respect to the tool housing 118. In some examples, the utility arm bracket 304 can also be fixed to other components of the finishing tool 100, e.g. the blade guard 116.

[0231] The utility arm 202 as shown in e.g. figure 11a is a side view of the utility arm 202. The utility arm 202 is pivotally mounted to the utility arm bracket 304 at both sides of the finishing tool 100. The utility arm 202 comprises a U-shape or a loop extending from either side of the finishing tool 100 as shown in Figure 11e.

[0232] The finishing tool 100 as shown in figures 11a, 11c and 11d is in a position whereby the rotor blades 114 are adjacent to the surface 282. Here these figures respectively show the utility arm 202 movable between a first position, a first arm position, a second arm position and a third arm position. Movement of the utility arm 202 about the utility arm pivot 204 is illustrated by the arrow in figure 11c.

[0233] When the utility arm 202 is in the first arm position, the utility arm 202 is pivoted away from the handle frame 104. The first arm position of the utility arm 202 is shown in figure 11 a. When the utility arm 202 is in the first arm position, the utility arm 202 is arranged to project over the battery 106. Accordingly, the utility arm 202 is in a protection position when in the first utility arm position. However, the utility arm 202 has a dual purpose when in the first utility arm position.The utility arm 202 also provides support for the finishing tool 100 when inverted e.g. as shown in figure 11b. Accordingly, the first arm position of the utility arm 202 is a support position and the utility arm 202 acts as a stand for the finishing tool 100. As shown in Figure 11b, the utility arm 202 projects beyond the battery 106 and the utility arm 202 and the blade guard 116 are in contact with the surface 282. This means that the user can position the utility arm 202 in the first arm position, then invert the finishing tool 100 so that the user can inspect the underside of the finishing tool 100. For example, the user can invert the finishing tool 100 and clean the rotor blades 114. This can also allow the user to replace or repair the rotor blades 114, if needed.

[0234] When the utility arm 202 is in the first utility arm position, the finishing tool 100 is in an operable configuration, e.g. the handle frame 104 is extended and the user can use the finishing tool 100 on the surface 282 to be finished. However, the utility arm 202 is pivotable into the second utility arm position or the third utility arm position. When the utility arm 202 is in either the second utility arm position or the third utility arm position, the utility arm 202 provides functionality when the finishing tool 100 is in an inoperable configuration, e.g. in a configuration for transport or the handle frame 104 is in a folded configuration.

[0235] Turning to figure 11c, the utility arm 202 is in the second utility arm position, wherein the utility arm 202 extends upright. That is, the utility arm 202 is in a 12 o'clock position and extends in a direction parallel with the rotor axis 124. In some examples, the centre of gravity of the finishing tool 100, when the handle frame 104 is in the folded configuration, as shown in figure 11c, is in line with the utility arm 202 when in the second utility arm position.

[0236] The utility arm 202 is connectable to a lifting apparatus such as a crane as a lifting point 306. Accordingly, the user secures the utility arm 202 to the lifting apparatus, e.g. a hook to the lifting point 306, and the finishing tool 100 can be lifted and manoeuvred around a worksite. Since the centre of gravity of the finishing tool 100 is in line with the utility arm 202 in the second utility arm position, the finishing tool 100 does not twist or rotate about the utility arm 202 or the lifting point 306. This makes lifting the finishing tool 100 via the utility arm 202 safer. In this way, when the utility arm 202 is in the second utility arm position, the utility arm 202 is in a lifting position.

[0237] Now turning to figure 11d, the utility arm 202 is in a third utility arm position. When the utility arm 202 is in the third utility arm position, the utility arm 202 secures the foldable handle frame 104 in position. Accordingly, the utility arm 202 is in a securing position when in the third utility arm position.

[0238] The utility arm 202 has been pivoted about the utility arm pivot 204 in a direction towards the first handle frame portion 162. The utility arm 202 has been pivoted such that the utility arm 202 is in engagement with the third handle frame portion 166. Indeed, in some examples, the utility arm 202 is in engagement with the third handle frame portion 166 when the utility arm 202 is in the third utility arm position. The utility arm 202 therefore prevents the foldable handle frame 104 from being reconfigured into the extended configuration. This helps secure the finishing tool 100 and the foldable handle frame 104 during transportation.In some examples, the utility arm 202 comprises a utility arm locking mechanism not shown. The utility arm locking mechanism selectively secures the utility arm 202 in the first utility arm position, the second utility arm position and the third utility arm position. The utility arm locking mechanism can be any suitable mechanism for locking the utility arm 202 against the utility arm bracket 304. For example, a locking pin inserted through reciprocal holes in the utility arm bracket 304 and the utility arm 202. Alternatively, a bolt and fastener can be inserted through the utility arm 202 and the utility arm bracket 304. Indeed, any suitable locking mechanism can be used. Alternatively, the utility arm 202 can be mounted at the utility arm pivot 204 such that frictional forces keep the utility arm 202 in its respective position until the user forcibly pivots the utility arm 202 into a new position.

[0239] Another example of the finishing tool 100 will now be discussed with reference to figures 14a, 14b, 14c, 17a and 17b. Figures 14a, 14b and 14c show different examples of a speed controller 180. According to different examples, figures 17 and 17b respectively show a perspective and perspective cross-sectional view of the speed controller 180.

[0240] In some examples, this speed actuator 184 is operatively coupled to a potentiometer 194, such that different positions of the speed actuator 184 select different positions on the potentiometer 194. Accordingly, different signals are sent from the speed controller 180 to the controller 154 and the motor 120. The speed controller 180, as shown in the accompanying figures, is arranged to comprise the plurality of selectable discrete speed settings. Accordingly, the speed controller 180 is configured to send a signal to the controller 154 corresponding to the different discrete speed settings of the speed actuator 184. This means that the user can select a predetermined speed setting for the finishing tool 100. This means that the user can also methodically and systematically use the function to achieve repeated speed, to achieve repeatable finishing results using repeatable speed settings. In other words, by not having a completely continuous adjustable speed setting from a minimum to a maximum, the user achieves better control of the finishing tool 100.

[0241] As mentioned above, the speed controller 180 is mounted to the handle 102 and is connected to the gearbox 312 or the tool head 108. Specifically, the speed controller 180 is connected (e.g. wired or wirelessly) to the controller 154 and the motor 120. The speed controller 180 is configured to send a signal to the controller 154 corresponding to a requested speed of the motor 120 and the rotor 112. The speed controller 180 comprises a speed actuator 184. The speed actuator 184 is manually selectable by the user and provides a plurality of selectable speed settings for the user.

[0242] The speed controller 180 is also shown in figures 9a and 9b, wherein the speed controller 180 is mounted to the handle 102 next to the gripping portion 148. The speed controller 180 comprises a speed controller housing 182, wherein components of the speed controller 180 are mounted therein. The speed controller 180 is mounted next to the gripping portion 148 so that the user can easily adjust the speed actuator 184 with their thumb whilst gripping the gripping portion 148.Figures 9a, 9b show a different form of the speed controller housing 182 from that shown in figures 17a, 17b. Indeed, the speed controller housing 182 can comprise any form in order to house the components therein in a safe and secure manner.

[0243] The speed actuator 184 is a user actuated dial or lever as shown in figures 14b and 14c. Whilst the lever in Figure 14b is shown as a single lever, in other examples there can be a plurality of levers connected to the speed actuator 184. The plurality of levers can be used for a thumb and index finger lever for moving the speed actuator 184 forwards and backwards.

[0244] The speed actuator 184 is rotatably mounted about a speed actuator rotation axis 186. The speed actuator 184 may comprise a plurality of indications corresponding to discrete speed settings e.g. figure 14b shows numbers 1 to 7 corresponding to seven different discrete speed settings. Indeed, there can be any number of speed settings so long as the speed settings are discrete and selectable by the user during operation. The different rotational positions of the speed actuator 184 correspond to different values generated by the potentiometer 194 and therefore different signals sent to the controller 154.

[0245] The speed actuator 184 as shown in figure 14c is also rotatable about the speed actuator rotation axis 186. However, the speed actuator 184 of Figure 14c comprises a projecting lever which makes adjusting the speed actuator 184 easier especially e.g. when the user wears gloves at the work site.

[0246] The speed controller housing 182 as shown in figure 17a comprises a clam shell design. Where in two halves of the speed controller housing 182 are fastened together. The speed controller housing 182 may comprise speed controller housing seal 196 such as an O-ring or another suitable sealing means for sealing the two halves of the speed controller housing 182 together.

[0247] The speed actuator 184 can be seen in figure 17b rotatable about the speed actuator rotation axis 186. The speed actuator 184 comprises a speed actuator shaft 190 aligned along the speed actuator rotation axis 186. The speed actuator shaft 190 is mechanically coupled to the potentiometer 194 and rotational movement of the speed actuator shaft 190 is detected by the potentiometer 194. The speed actuator shaft 190 is rotatably coupled to the potentiometer 194 via speed shaft hooks 198 of which engage with a central hole within the potentiometer 194. The potentiometer 194 is mounted to a speed controller PCB 192 mounted within the speed controller housing 182. The speed actuator 184 is sealed from the external environment via a shaft sealing 188 which is mounted around the speed actuator shaft 190.

[0248] As mentioned above, the speed actuator 184 is configured to select a plurality of discrete speed settings. The different discrete speed settings are provided by a plurality of speed actuator teeth 310 circumferentially positioned around the speed actuator 184. Figure 14a shows a cross-sectional view across the speed actuator 184 showing the plurality of speed actuator teeth 310. The speed actuator teeth 310 are engageable with a speed actuator spring 308. Thespeed actuator spring 308 engages a speed actuator 184 until rotational movement of the speed actuator 184 occurs and then the speed actuator spring 308 snaps into engagement with another speed actuator tooth 310. The speed actuator teeth 310 as shown in figure 14a is distributed around the entire circumference of the speed actuator 184 but only one speed actuator tooth 310 is labelled for the purposes of clarity. The speed actuator spring 308 can select any of the predetermined discrete speed settings corresponding to the speed actuator teeth 310.

[0249] Accordingly, the speed actuator spring 308 and the speed actuator teeth 310 provide a speed actuator detent mechanism 200 for the user to selectively select different discrete speed settings of the speed actuator 184. Whilst the speed actuator detent mechanism 200 as shown in the figures is a spring detent mechanism, any other alternative detent mechanism can be used, for example a ball detent, etc.

[0250] Furthermore, the speed controller 180 and speed actuator 184, as shown in the figures, provide different examples of a mechanically selectable speed controller 180. However, in other examples, the discrete speed settings can be achieved by sending digital signals from the speed controller 180 to the controller 154. For example, the speed controller 180 can comprise a rotational sensor detecting a plurality of discrete rotational settings, e.g. a Hall sensor with a plurality of circumferentially mounted magnets, and signals are sent from a speed controller 180 corresponding to the detected rotational position of the speed actuator 184. Alternatively, the speed actuator 184 can be mechanically coupled to a rotary encoder configured to send signals corresponding to discrete detected speed actuator 184 positions. Accordingly, the speed actuator 184 comprises a rotation sensor arranged to detect a relative discrete position of the speed actuator 184 with respect to the speed controller housing 182.

[0251] As shown in Figure 17b the speed actuator 184 comprises a projecting skirt which overlaps a portion of the speed controller housing 182. This further helps prevent water and dirt from entering the speed controller 180.

[0252] In some examples, the speed actuator 184 is optionally rotatable about the speed actuator rotation axis 186 less than 360 degrees. This means that each angular position of the speed actuator 184 with respect to the speed controller housing 182 is unique. Accordingly, each position of the speed actuator 184 corresponds to a unique speed setting of the motor 120.

[0253] In some examples, the speed actuator 184 can alternatively comprise one or more of an optical rotary encoders, a Hall effect rotary sensors with multiple poles, magnetic rotary encoders with multiple pole pairs, potentiometric rotary sensors with discrete detents, or any other suitable sensor.

[0254] In another example, two or more examples are combined. Features of one example can be combined with features of other examples.Examples of the present disclosure have been discussed with particular reference to the examples illustrated. However, it will be appreciated that variations and modifications may be made to the examples described within the scope of the disclosure.

[0255] The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms "comprises," "comprising," "includes," and / or "including" when used herein specify the presence of stated features, integers, actions, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, actions, steps, operations, elements, components, and / or groups thereof.

[0256] It will be understood that, although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure.

[0257] Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

[0258] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealised or overly formal sense unless expressly so defined herein.

[0259] It is to be understood that the present disclosure is not limited to the aspects described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the disclosure being set forth in the following claims.

Claims

Claims1. A surface finishing tool (100) comprising:a tool head (108);a motor (120) mounted to the tool head (108);a battery (106) removably mountable to the tool head (108) and electrically connectable to the motor (120); a rotor (112) operatively coupled to the motor (120) and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage a surface (282); anda handle (102) connected to the tool head (108),wherein a longitudinal axis of the battery (106) is inclined with respect to the rotor axis (124).

2. The surface finishing tool (100) according to claim 1 wherein the rotor axis (124) is between the battery (106) when mounted to the tool head (108) and the handle (102).

3. The surface finishing tool (100) according to claim 2 wherein a centre of gravity of the battery (106) when mounted to the tool head (108) is at a first distance from the rotor axis (124) and the centre of gravity of the handle is at a second distance from the rotor axis (124) and the first distance is smaller than the second distance.

4. The surface finishing tool (100) according to claims 2 or 3 wherein a force due to the battery (106) about the rotor axis (124) is balances a force due to the handle (102) about the rotor axis (124).

5. The surface finishing tool (100) according to any of the preceding claims wherein the longitudinal axis of the battery (106) is inclined towards the handle (102).

6. The surface finishing tool (100) according to claims 4 or 5 wherein the angle of inclination of the longitudinal axis of the battery (106) with respect to the rotor axis (124) is between 5 degrees to 45 degrees.

7. The surface finishing tool (100) according to any of claims 1 to 6 wherein a battery centre of gravity (270) is offset from the rotor axis (124).

8. The surface finishing tool (100) according to any of the preceding claims wherein a motor axis (122) is offset from the rotor axis (124).

9. The surface finishing tool (100) according to claim 8 wherein the rotor axis (124) is between the motor axis (122) and the battery (106).

10. The surface finishing tool (100) according claims 8 or 9 wherein the motor axis (122) is closer to the rotor axis (124) than a battery centre of gravity (270).3511. The surface finishing tool (100) according to any of the preceding claims wherein at least one gear (142) operatively couples the motor (120) and the rotor (112).

12. The surface finishing tool (100) according to any of the preceding claims wherein the pitch of the at least one rotor blade (114) is adjustable.

13. The surface finishing tool (100) according to any of the preceding claims wherein the handle (102) is foldable.

14. The surface finishing tool (100) according to any of the preceding claims wherein the handle comprises a T-bar gripping portion (148).

15. The surface finishing tool (100) according to any of the preceding claims wherein a longitudinal axis of the handle is inclined to the rotor axis (124).

16. A surface finishing tool (100) comprising:a tool head (108);a motor (120) mounted to the tool head (108);a battery receiver mounted to the tool head and configured to removably receive a battery (106);a rotor (112) operatively coupled to the motor (120) and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage a surface (282); anda handle (102) connected to the tool head (108),wherein the battery is receiver is configured such that, when the battery is mounted to the battery receiver, a longitudinal axis of the battery (106) is inclined with respect to the rotor axis (124).

17. A surface finishing tool (100) comprising:a tool head (108);a motor fan assembly mounted to the tool head (108), the motor fan assembly is arranged to generate a first airflow along a first airflow path (156) between at least one air inlet (128) and at least one air outlet (130);a rotor (112) operatively coupled to the motor assembly and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage a surface (282);wherein the at least one air inlet (128) is positioned on a side of the tool head (108) and the tool head (108) comprises a second airflow along a second airflow path (158) arranged to cool the motor fan assembly and the second airflow is isolated from the first airflow.

18. The surface finishing tool (100) according to claim 17 wherein the second airflow is within a sealed motor housing (260).3619 The surface finishing tool (100) according to any of claims 17 or 18 wherein at least a portion of the first airflow path (156) is adjacent to a first side of a motor housing wall (290) and at least a portion of the second airflow path (158) is adjacent to a second side of the motor housing wall (290).

20. The surface finishing tool (100) according to any of claims 17 to 19 wherein the second airflow is generated via rotating agitator (330).

21. The surface finishing tool (100) according to any of claims 17 to 20 wherein the at least one air inlet is a plurality of air inlets (128) circumferentially arranged around a tool housing (118).

22. The surface finishing tool (100) according to any of claims 17 to 21 wherein the at least one air outlet is a plurality of air outlets (130) arranged around a tool housing (118).

23. The surface finishing tool (100) according to any of claims 17 to 22 wherein the at least one air outlet (130) is positioned closer to the surface (282) to be finished than that air inlet (128) when in use.

24. The surface finishing tool (100) according to any of claims 17 to 23 wherein the first airflow path (156) is perpendicular to a motor axis (122) of the motor fan assembly at the at least one airflow inlet (128).

25. The surface finishing tool (100) according to any of claims 17 to 24 wherein the first airflow path (156) is substantially parallel to a motor axis (122) of the motor fan assembly at the at least one airflow outlet (130).

26. The surface finishing tool (100) according to any of claims 17 to 25 wherein the motor fan assembly is arranged to generate the first airflow when driving the rotor (112).

27. The surface finishing tool (100) according to any of claims 17 to 26 wherein one or more heatsink (152) is positioned along the first airflow path (156).

28. The surface finishing tool according to claim 27 wherein the one or more cooling ribs (152) transfer heat from a controller (154).

29. The surface finishing tool according to claim 28 wherein the controller (154) is mounted to a first side of a controller PCB (262).

30. The surface finishing tool (100) according to claim 29 wherein the heatsink (152) is mounted to a second side of the controller PCB (262).

31. The surface finishing tool (100) according to any of claims 29 or 30 wherein a controller bracket (294) is coupled to the controller PCB (262) and a tool housing (118) and the first side of the controller PCB (262) is separated from the airflow along the first airflow path (156).

32. The surface finishing tool (100) according to any of claims 17 to 31 wherein the tool housing (118) comprises a fan baffle (268) extending over the motor fan assembly arranged to guide the first airflow to the at least one air outlet (130).

33. The surface finishing tool (100) according to any of claims 17 to 32 wherein the direction of the first airflow along the first airflow path (156) is from the at least one air inlet (128) to the at least one air outlet (130) when the motor (120) rotates in a first direction or a second direction.

34. The surface finishing tool (100) according to any of claims 17 to 33 wherein the tool head (108) comprises a top portion opposite a bottom portion comprising the at least one rotor blade (114) and the at least one air inlet (128) is positioned on the side of the tool head (108) between the top portion and the bottom portion.

35. A surface finishing tool (100) comprising:a tool head (108);a motor (120) mounted to the tool head (108);a rotor (112) operatively coupled to the motor (120) and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage the surface (282); anda foldable handle (102) connected to the tool head (108):wherein the foldable handle (102) is moveable between an extended configuration and a folded configuration.

36. The surface finishing tool (100) according to claim 35 wherein the foldable handle (102) comprises a plurality of pivotally connected handle frame portions (162, 164, 166).

37. The surface finishing tool (100) according to claims 35 or 36 wherein the foldable handle (102) comprises a first handle frame portion (162) fixed with respect to the tool head (108) wherein one or more other handle frame portions (164, 166) are pivotally mounted to the first handle frame portion (162).

38. The surface finishing tool (100) according to any of claims 35 to 37 wherein the foldable handle (102) comprises one or more fasteners for selectively securing the plurality handle frame portions (162, 164, 166) in the extended configuration.

39. The surface finishing tool (100) according to claim 38 wherein the one or more fasteners are configured to selectively secure the plurality of handle frame portions (162, 164, 166) in the folded configuration.

40. The surface finishing tool (100) according to claims 38 or 39 wherein the one or more fasteners are threaded fasteners.

41. The surface finishing tool (100) according to any of claims 35 to 40 wherein the foldable handle comprises a second handle frame portion (164) and a third handle frame portion (166) pivotally connected to each other and arranged to fold adjacent to each other in the folded configuration.

42. The surface finishing tool (100) according to any of claims 35 to 41 wherein the foldable handle (102) comprises a pivotally connected handle gripping portion (148).

43. The surface finishing tool (100) according to claim 42 wherein the handle gripping portion (148) comprises at least one user interface configured to control the motor (120) and / or the at least one rotor blade (114).

44. The surface finishing tool (100) according to claim 43 wherein the user interface is connected to the tool head (108) when the foldable handle (102) is in the extended configuration and the folded configuration.

45. The surface finishing tool (100) according to claim 44 wherein the user interface is connected to the tool head (108) via :a cable and the cable threaded along the foldable handle (102) via a plurality of cable pulleys (224, 226); and / or a wire routed along or within a frame of the foldable handle.

46. The surface finishing tool (100) according to any of claims 35 to 45 wherein a blade guard (116) is mounted to the tool head (108) arranged to cover the at least one rotor blade (114).

47. The surface finishing tool (100) according to claim 46 wherein the foldable handle (102) when in the folded configuration is within a perimeter defined by the blade guard (116).

48. The surface finishing tool (100) according to any of claims 35 to 47 wherein at least a portion of the foldable handle (102) is adjacent to the tool head (108) when the foldable handle (102) is in the folded configuration.

49. A surface finishing tool (100) comprising:a tool head (108);a motor (120) mounted to the tool head (108);a rotor (112) operatively coupled to the motor (120) and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage a surface (282) and the at least one rotor blade (114) is rotatable about a blade pivot axis (134) such that the pitch angle of the rotor blade (114) with respect to the surface (282) is adjustable;39a moveable pressure plate (232) mounted to the tool head (108) and mechanically coupled to the at least one rotor blade (114) such that movement of the pressure plate (232) rotates the at least one rotor blade (114) about the blade pivot axis (134); anda pressure plate adjustment mechanism (206) connected to the moveable pressure plate (232) and configured to adjust the pitch angle of the at least one rotor blade (114); wherein the pressure plate adjustment mechanism (206) comprises a coarse blade angle adjustment mechanism (274) and a fine blade angle adjustment mechanism (276).

50. The surface finishing tool (100) according to claim 49 wherein the pressure plate adjustment mechanism is mounted on a handle (102) connected to the tool head (108).

51. The surface finishing tool (100) according to claim 50 wherein the coarse blade angle adjustment mechanism (274) is moveably mounted on the handle (102).

52. The surface finishing tool (100) according to claim 51 wherein the coarse blade angle adjustment mechanism (274) is pivotally mounted on the handle (102).

53. The surface finishing tool (100) according to any of claims 49 to 52 wherein the coarse blade angle adjustment mechanism (274) and the fine blade angle adjustment mechanism (276) are mechanically coupled.

54. The surface finishing tool (100) according to claim 53 wherein the fine blade angle adjustment mechanism (276) comprises a first adjustment gear (216) engageable with a second adjustment gear (218) fixed with respect to the handle frame (104).

55. The surface finishing tool (100) according to claim 54 wherein the first adjustment gear (216) is a worm gear.

56. The surface finishing tool (100) according to any of claims 54 to 55 wherein the fine blade angle adjustment mechanism (276) comprises a shift lever (210) to selectively disengage the first adjustment gear (216) engageable from the second adjustment gear (218).

57. The surface finishing tool (100) according to any of claims 49 to 56 wherein the wherein the first adjustment gear (216) is biased towards the second adjustment gear (218).

58. The surface finishing tool (100) according to any of claims 49 to 57 wherein the pressure plate adjustment mechanism (206) is connected to the moveable pressure plate (232) via a pressure plate cable (136).

59. The surface finishing tool (100) according to claim 58 wherein the pressure plate cable (136) is coupled to the moveable pressure plate (232) via a pressure plate lever (230).4060. The surface finishing tool (100) according to claims 58 or 59 when dependent on any of claims 49 to 51 wherein the pressure plate cable (136) is threaded along the handle (102) via a plurality of cable pulleys (224).

61. The surface finishing tool (100) according to any of claims 50 to 60 wherein the handle (102) is foldable between an extended configuration and a folded configuration and the pressure plate adjustment mechanism (206) is connected to the moveable pressure plate (232) when the handle (102) is in the extended configuration and the folded configuration.

62. The surface finishing tool (100) according to any of claims 49 to 61 wherein the moveable pressure plate (232) is mounted around a rotor axis (124) and moveable in a direction perpendicular to the rotor axis (124).

63. The surface finishing tool (100) according to any of claims 49 to 62 wherein the moveable pressure plate is mechanically coupled to the at least one rotor blade (114) via a rotor blade pivot arm (234).

64. A surface finishing tool (100) comprising:a tool head (108);a motor (120) mounted to the tool head (108);a battery receiver for receiving a battery;a rotor (112) operatively coupled to the motor (120) and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage a surface (282); andat least one transportation wheel (236) moveable between a deployed position and a retracted position wherein the at least one transportation wheel (236) is engageable with the surface (282) or the ground when in the deployed position.

65. The surface finishing tool (100) according to claim 64 wherein a transport wheel bracket (248) is fixed with respect to a blade guard (116) and the at least one transportation wheel (236) is moveably connected to the transport wheel bracket (248).

66. The surface finishing tool (100) according to claim 65 wherein the blade guard (116) is connected to the tool head (108) and the transport wheel bracket (248) is mounted to the blade guard (116).

67. The surface finishing tool (100) according to claim 66 wherein the at least one transportation wheel (236) projects beyond the blade guard (116) when in the deployed position.

68. The surface finishing tool (100) according to any of claims 65 to 67 wherein the at least one transportation wheel (236) is pivotally mounted to the transport wheel bracket (248) via a foldable wheel leg (238).4169. The surface finishing tool (100) according to claim 68 wherein a longitudinal axis of the foldable wheel leg (238) is inclined with respect to the rotor axis (124) when the at least one transportation wheel (236) is in the deployed position.

70. The surface finishing tool (100) according to any of claims 64 to 69 wherein the at least one transportation wheel (236) comprises a wheel locking mechanism (280).

71. The surface finishing tool (100) according to claim 70 wherein the wheel locking mechanism (280) comprises a wheel leg securing pin (242) arranged to respectively engage a first wheel securing hole (244) and a second wheel securing hole (246) in the transport wheel bracket (248) when the at least one transportation wheel (236) is in the deployed position and the retracted position.

72. The surface finishing tool (100) according to any of claims 64 to 71 wherein a handle (102) is connected to the tool head (108) and the at least one transportation wheel (236) is mounted on the same side of the surface finishing tool (100) as the handle (102).

73. The surface finishing tool (100) according to claim 72 wherein the at least one transportation wheel (236), when in the deployed position, is between a centre of gravity of the handle (102) and the tool head (108).

74. The surface finishing tool (100) according to any of claims 64 to 73 wherein the at least one transportation wheel (236) is a first transportation wheel and a second transportation wheel.

75. The surface finishing tool (100) according to claim 74 when dependent on claim 10 wherein the first transportation wheel (236) and the second transportation wheel are arranged to be positioned either side of the handle (102) when in the retracted position.

76. The surface finishing tool (100) according to any of claims 64 to 75 wherein an axis of rotation of the at least one transportation wheel (236) is perpendicular to the rotor axis (124) of the rotor (112).

77. The surface finishing tool (100) according to any of claims 64 to 76 wherein the walk-behind surface finishing tool (100) comprises a battery (106) removably mountable to a battery receiver mounted to the tool head (108) and electrically connectable to the motor (120).

78. The surface finishing tool (100) according claim 77 wherein a longitudinal axis of the battery (106) is inclined with respect to an axis of the at least one transportation wheel (236).4279. A surface finishing tool (100) comprising:a tool head (108);a motor fan assembly mounted to the tool head (108), the motor fan assembly arranged to generate a first airflow along a first airflow path (156) between at least one air inlet (128) and at least one air outlet (130);a rotor (112) operatively coupled to the motor fan assembly and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage a surface (282);a controller (154) configured to send control signals to the motor fan assembly mounted in the tool head (108);wherein the first airflow path (156) is located in a first housing volume (298) and the controller is located in a second housing volume (300) and is separated from the first airflow path (156).

80. The surface finishing tool (100) according to claim 79 wherein a barrier is mounted within a tool housing (118) mounted to the tool head (108) and separates the tool housing (118) into the first housing volume (298) comprising the first airflow path (156) and the second housing volume (300) comprising the controller (154).

81. The surface finishing tool (100) according to claim 80 wherein the barrier is a controller bracket (294) coupled between the controller (154) and the tool housing (118).

82. The surface finishing tool (100) according to claim 81 wherein the controller (154) is mounted on a first side of a controller PCB (262) and the controller bracket (294) is arranged to engage the controller PCB (262) such that the first side of the controller PCB (262) is in fluid communication with the first housing volume (298) and the second side of the controller PCB (262) is in fluid communication with the second housing volume (300).

83. The surface finishing tool (100) according to any of claims 79 to 82 wherein at least a portion of the first airflow path (156) is adjacent to a first side of a motor housing wall (290).

84. The surface finishing tool (100) according to any of claims 79 to 83 wherein the at least one air inlet (128) is a plurality of air inlets arranged around the tool housing (118).

85. The surface finishing tool (100) according to any of claims 79 to 84 wherein the at least one air outlet (130) is a plurality of air outlets circumferentially arranged around the tool housing (118).

86. The surface finishing tool (100) according to any of claims 79 to 85 wherein the at least one air outlet (130) is positioned closer to the surface (282) to be finished than that air inlet (128) when in use.

87. The surface finishing tool (100) according to any of claims 79 to 86 wherein the first airflow path (156) is perpendicular to a motor axis (122) of the motor fan assembly at the at least one airflow inlet (128).4388. The surface finishing tool (100) according to any of claims 79 to 87 wherein the first airflow path (156) is substantially parallel to a motor axis (122) of the motor fan assembly at the at least one airflow outlet (130).

89. The surface finishing tool (100) according to any of claims 79 to 88 wherein the motor fan assembly is arranged to generate the first airflow when driving the rotor (112).

90. The surface finishing tool (100) according to any of claims 79 to 89 wherein one or more heatsinks (152) in thermal connection with the controller (154) are positioned along the first airflow path (156).

91. The surface finishing tool (100) according to claim 90 when dependent on claim 82 wherein the heatsinks (152) are mounted to the second side of the controller PCB (262).

92. The surface finishing tool (100) according to any of claims 79 to 91 wherein the tool housing (118) comprises at least wire hole (302) in the second housing volume (300) arranged to receive one or more wires connected to the controller (154).

93. The surface finishing tool (100) according to any of claims 80 to 92 wherein the barrier seals the first housing volume (298) from the second housing volume (300).

94. The surface finishing tool according to any of claims 79 to 93, wherein the second housing is substantially sealed from the first airflow path and wherein the surface finishing tool further comprises a heat conductive element configured to thermally couple the controller to the first airflow path so as to provide cooling for the controller.

95. A surface finishing tool (100) comprising:a tool head (108);a motor (120) mounted to the tool head (108);a battery receiver for removably receiving a battery ;a rotor (112) operatively coupled to the motor (120) and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage a surface (282); anda controller (154) configured to send control signals to the motor fan assembly; anda speed controller (180) connected to the controller (154) and comprising a speed actuator (184) having a plurality of selectable discrete speed settings;wherein the speed controller (180) is configured to send a signal to the controller (154) corresponding to a selected discrete speed setting of the speed actuator (184).

96. The surface finishing tool (100) according to claim 95 wherein the speed actuator (184) is rotatably mounted to a speed controller housing (182).4497. The surface finishing tool (100) according to claims 95 or 96 wherein the speed actuator (184) is a rotatable knob ora rotatable dial.

98. The surface finishing tool (100) according to any of claims 95 to 97 wherein the speed actuator comprises a speed actuator detent mechanism (200).

99. The surface finishing tool (100) according to claim 98 wherein the speed actuator detent mechanism (200) comprises a speed actuator spring (308) selectively engageable with a plurality of recesses on the speed actuator (184).

100. The surface finishing tool (100) according to claim 99 wherein the speed actuator spring (308) is mounted to the speed controller housing (182).

101. The surface finishing tool (100) according to claims 99 or 100 wherein the plurality of recesses each correspond to a different angular position of the speed actuator (184).

102. The surface finishing tool (100) according to any of claim 95 to 101 wherein the speed actuator (184) is coupled to a potentiometer (194).

103. The surface finishing tool (100) according to any of claims 95 to 102 wherein the speed actuator (184) comprises a projecting lever.

104. The surface finishing tool (100) according to any of claims 95 to 103 wherein the speed actuator (184) comprises a speed actuator shaft (190) and a shaft seal (188) is mounted to the speed actuator shaft (190).

105. The surface finishing tool (100) according to any of claims 95 to 104 wherein the speed controller (180) is mounted on a handle (102) of the finishing tool (100).

106. The surface finishing tool (100) any of claims 95 to 105 when dependent on claim 94 wherein the speed controller housing (182) comprises a first housing part and a second housing part and a seal is mounted between the first housing part and the second housing part.

107. The surface finishing tool (100) according to any of claims 95 to 106 when dependent on claim 2 wherein the speed actuator (184) comprises a projecting skirt which overlaps a portion of the speed controller housing (182).

108. The surface finishing tool (100) according to any of claims 95 to 107 wherein the speed actuator (184) comprises rotation sensor arranged to detect a relative discrete position of the speed actuator (184).45109. The surface finishing tool (100) according to any of claims 95 to 108 wherein the speed actuator (184) is rotatable about a speed actuator rotation axis (186) less than 360 degrees.

110. A surface finishing tool (100) comprising:a tool head (108);a motor (120) mounted to the tool head (108);a rotor (112) operatively coupled to the motor (120) and arranged to rotate about a rotor axis (124), the rotor (112) comprising at least one rotor blade (114) arranged to engage a surface (282); anda handle (102) connected to the tool head (108); anda utility arm (202) moveable between a plurality of different utility arm positions wherein each utility arm position corresponds to a different function of the utility arm (202).

111. The surface finishing tool (100) according to claim 110 wherein the utility arm (202) is moveable to a first utility arm position wherein the utility arm (202) projects over a battery (106) mounted to the tool head (108).

112. The surface finishing tool (100) according to claims 110 or 111 wherein when the utility arm (202) is in the first utility arm position, the utility arm (202) is engageable with the surface (282) when the finishing tool (100) is in an upended position.

113. The surface finishing tool (100) according to claim 112 wherein the finishing tool (100) comprises a blade guard (116) connected to the tool head (108) and only the utility arm (202) and the blade guard (116) are engageable with the surface (282) when the finishing tool (100) is in the upended position.

114. The surface finishing tool (100) according to any of claims 110 to 113 wherein the utility arm (202) is moveable to a second utility arm position wherein the utility arm (202) is positioned above the rotor (112) and / or the motor (120).

115. The surface finishing tool (100) according to claim 114 wherein the utility arm (202) comprises lifting point (306) arranged to support the finishing tool (100) when the utility arm (202) is in the second utility arm position.

116. The surface finishing tool (100) according to any of claims 110 to 115 wherein the utility arm (202) is moveable to a third utility arm position wherein the utility arm (202) secures one or more moveable components of the finishing tool (100) against the tool head (108).

117. The surface finishing tool (100) according to claim 116 wherein the finishing tool (100) comprises a foldable handle (102) and the foldable handle (102) is moveable between an extended configuration and a folded configuration, and the utility arm (202) is arranged engage the foldable handle (102) in the folded configuration when the utility arm (202) is in the third utility arm position.46118. The surface finishing tool (100) according to claim 117 wherein the foldable handle (102) comprises a plurality of pivotally connected handle frame portions (162, 164, 166).

119. The surface finishing tool (100) according to claims 117 or 118 wherein the foldable handle (102) comprises a first handle frame portion (162) fixed with respect to the tool head (108) wherein one or more other handle frame portions (162, 164, 166) are pivotally mounted to the first handle frame portion (162).

120. The surface finishing tool (100) according to any of claims 117 to 119 wherein the foldable handle (102) comprises a second handle frame portion (164) and a third handle frame portion (166) pivotally connected to each other and arranged to fold adjacent to each other in the folded configuration.

121. The surface finishing tool (100) according to any of claims 117 to 120 wherein the foldable handle (102) when in the folded configuration is within a perimeter defined by the blade guard (116).

122. The surface finishing tool (100) according to any of claims 117 to 121 wherein at least a portion of the foldable handle (102) is adjacent to the tool head (108) when the foldable handle (102) is in the folded configuration.

123. The surface finishing tool (100) according to any of claims 110 to 122 wherein the utility arm (202) is pivotally mounted to the finishing tool (100).

124. The surface finishing tool (100) according to any of claims 110 to 123 wherein the second utility arm position is between the first utility arm position and the third utility arm position.

125. The surface finishing tool (100) according to any of claims 110 to 124 wherein the finishing tool (100) comprises a utility arm locking mechanism arranged to selectively lock the utility arm (202) in each of the plurality of different utility arm positions.47

Images