A safety device for open-topped vehicles

Abstract

The invention is a safety device for the operator of an open topped vehicle such as a ride-on mower, tractor, quad bike or the like. The safety device substantially forms a nearly enclosed cage over the operating position of the vehicle, protecting the operator from hazards. It includes a plurality of horizontal and vertical members arranged to have a substantially curved surface facing the primary direction of travel, deflecting potential hazards to the side and / or upwards over the operating position of the vehicle. The safety device is pivotally mounted at one end to the vehicle to allow entry and egress of the operator.

Description

1. Statement of Corresponding Applications This application is based on the provisional specification filed in relation to New Zealand Patent Application No. 807455, the entire contents of which are incorporated herein by reference. 2. Field of the Technology The present invention relates to a safety device for open-topped vehicles. The invention has particular application to use in, but not limited to, the agricultural and horticulture industries where the operators of open-topped vehicles, such as mowers, can be exposed to oncoming hazards in the direction of travel, which can lead to serious injury of the operator. 3. Background to the Technology Open-topped vehicles, such as mowers, are vital pieces of equipment used in the agricultural and horticultural sectors. Such vehicles are typically configured with a base chassis consisting of wheels and cutting blades, a seat for the operator that is situated on the base chassis. Some mowers may also include variations of a roll bar connected or otherwise mounted to the chassis; these provide some degree of protection for the operator in the instance of the mower rolling onto its side. Other open-topped vehicles such as tractors, ATVs and various utility vehicles, are also used in these sectors, and similarly consist of at least a chassis and wheels, with additional fittings that may depend on their end use. When these types of vehicles are used in a setting where the operator is exposed to potential hazards, i.e. in a horticultural environment such as an orchard, vineyard, golf course or park, there is a risk that the operator could be injured by objects that are in the direction of travel. This risk is particularly acute for objects that may have a relatively low profile. For example, if a hazard in the form of a vine or a wire, with relatively minimal slack, were to be positioned at approximately the torso height of the operator, in the path of intended path of travel, this could lead to serious injury for the operator should they not observe said hazard in time to stop the vehicle. The tension applied by these hazards, if the vehicle was not quickly stopped, could cause a cutting or slicing-like wound to the operator. There is also the possibility of blunt force trauma injuries from hazards, such as sagging plant climbing frames and so on, that do not penetrate the skim In New Zealand, there have been a number of serious injuries and fatalities arising from incidents where the hazards have contacted the neck and head of the operators. Operators have the option of wearing head protection, such as a safety helmet or arborist helmet, to provide a means of protection against potential hazards of this nature. Conversely, to attain a suitable level of protection against oncoming hazards, this protection equipment can become impractical due to the size and weight. For example, there may be a loss of functionality and vision if an operator were to wear a full-face helmet with a chin strap, due to the restrictive nature of such protective devices. For example, the chin strap could become a choking hazard in the event the upper portion of the helmet becomes snagged by vines or wires. This can affect operator's compliance with such types of protective equipment. Furthermore, even when wearing these forms of head protection, they can still leave the neck and throat area exposed. Currently, some open-topped vehicles used in the agricultural industry have a roll-over bar that provides protection for the operator in the event of a roll-over. However, the operator still remains exposed to oncoming hazards in the direction of travel. A solution to the aforementioned problems is desired. 4. Object of the Technology It is an object of the technology to provide a safety device for the operator of an open-topped vehicle and a method for manufacturing and using same. It is also object of the technology to provide an open-topped vehicle including a safety device for the operator of said vehicle and a method for manufacturing and using same. Alternatively, it is an object of the technology to provide a safety device for an open-topped vehicle that protects the operator of said vehicle from injury and death. Alternatively, it is an object of the technology to provide a safety device for an open-topped vehicle that is easy to use. Alternatively, it is an object of the technology to provide a safety device for an open-topped vehicle that is cost-effective to manufacture. Alternatively, it is an object of the technology to provide a safety device for an open-topped vehicle which is able to protect the operator from oncoming hazards. Alternatively, it is an object of the technology to provide a safety device that may be retrofitted to existing open-topped vehicles. At the very least, it is an object of the technology to at least provide the public with a useful choice. 5. Summary of the Technology According to one aspect of the invention, there is provided a safety device for the operator of an open-topped vehicle having a front end facing a primary direction of travel for the vehicle, the vehicle also including an operating position for the operator, wherein the safety device includes a forward end that corresponds to the front end of the vehicle and a rearward end, wherein the safety device includes; a base assembly having a substantially horizontal frame member, having a curved segment substantially at or proximate to the forward end, and wherein the base assembly is configured to be mounted to an attachment means configured and arranged to be fixed to the open-topped vehicle; at least one pair of substantially vertical uprights mounted to the base assembly, wherein each upright has a curved segment extending upwards and away from the forward end to the rearward end of the safety device; a forward deflection assembly including a plurality of substantially vertical deflection members, wherein the forward deflection assembly is positioned substantially between an upper end of one pair of the substantially vertical uprights; and wherein the forward deflection members include a curved segment extending away from the forward end to the rearward end of the safety device; and wherein, in use, the forward end of the safety device is located in front of the operating position for the operator of the vehicle and the rearward end of the safety device is located behind the operating position for the operator of the vehicle. The invention is a safety device for the operator of an open topped vehicle such as a ride-on mower, tractor, quad bike or the like, which are used in agricultural and horticultural settings, environments where there be hazards such as low hanging cables, timber structures, irrigation hoses, wires, and vines and so on. The safety device substantially forms a nearly enclosed cage over the operating position of the vehicle, protecting the operator of same. It is formed from a plurality of horizontal and vertical members, all of which are arranged to have a substantially curved surface facing forwards, i.e. the primary direction of travel, deflecting potential hazards either to the side or upwards over the operator and operating position of the vehicle. The use of curved surfaces also reduces potential catch points which may snag some hazards. The safety device is pivotally mounted at one end to the vehicle to allow entry and egress of the operator. The open-topped vehicle should be understood to mean any vehicle which lacks an enclosed environment for the operator of the vehicle. Non-limiting examples of such vehicles include ride-on mowers, quad bikes, cab-less tractors and the like, all of which being commonly used in the agricultural and / or horticultural industries. Such vehicles have a primary direction of travel, i.e. forwards, but may also be used in a secondary direction of travel, i.e. reverse. The vehicle will be understood to have an operating position, with a forward end, facing the primary direction of travel, in front of the operator and a rearward end behind the operator, and reference to this effect will be made throughout the remainder of the specification. In some vehicles, the operator's position may be reversed such that the operator faces the secondary direction of travel; in these examples, the primary direction will be in reverse, and it will be understood that references to the vehicle and safety device having a forward end and rearward end will be adjusted appropriately In one example, the horizontal frame member has a substantially U-shaped or semi-oval profile in plan view, the curved segment substantially corresponding to the closed portion of the profile. A curved segment should be understood to be a portion of the relevant member that has a substantially smooth, continuous, curved surface. However, it may also be a structure that is made up of a series of straight segments arranged in a substantially curved profile. The use of a curved segment is to minimise any risk of snagging of hazards such as wires and the like; instead, the hazards contact and move over the curved surfaces to be deflected away. In one example, the base example may be formed from one horizontal frame member. In other examples, the base assembly may be formed from two or more horizontal frame members, each having a curved segment extending away from the forward end to the rearward end of the safety device. In one example, the one or more horizontal frame members may be made from rectangular bar section. In another example, the one or more horizontal members may be formed from a tubular section. In one example, the safety device may include additional horizontal frame members elevated from the base assembly, each having a curved segment extending away from the forward end to the rearward end of the safety device. In an alternative example, the base assembly may be formed In one example, the additional horizontal frame members may be mounted to one or more of the pair of vertical uprights. In another example, the one or more horizontal members may be formed from a tubular section. In one example, the area between the base assembly and the pair of vertical uprights may be substantially covered by an impact resistant sheet of a substantially transparent material. In a preferred example, this may be clear plastic or Perspex™. In one example, the at least one pair of substantially vertical uprights mounted to the base assembly may include a first curved segment extending upwards and away from the forward end to the rearward end of the safety device and a second curved segment extending upwards and away from the rearward end to the forward end of the safety device. In this example, the respective curved segments meet at their uppermost ends. In one example, the safety device may include the attachment means that is mounted at or proximate the operating position of the vehicle with which the safety device is to be used. In one example, the attachment means is provided substantially at or proximate to the rearward end of the safety device and mounts same at or proximate the rear of the operating position. In another example, the attachment means is provided substantially at or proximate the forward end of the safety device and mounts same at or proximate the front of the operating position, i.e. facing the primary direction of travel. In one example, the base assembly may be configured to be pivotally movable when mounted to the attachment means. In one example, the attachment means may include a mounting bracket configured and arranged for the purpose of attaching the safety device to the vehicle. In this example, the mounting bracket may be arranged to allow the safety device to be attached to the vehicle at different heights. In one example, the safety device may include a second attachment means configured to be mounted to the other of the forward end or rearward end of the vehicle with which the safety device is to be used. In this example, the second attachment means may be configured to be amounted to the appropriate end of the open-topped vehicle with which the invention is to be used. In one example, the second attachment means may be configured with an upper end provided with a bearing surface for the forward end of the safety device. In one example, a locking mechanism may be provided to the second attachment means, which secures the base assembly of the safety device to the bearing surface of the second attachment means. In this example, the locking mechanism may be provided with a lever to aid in the actuation of the locking mechanism. In a preferred example, the lever may be a handle. In an alternative example, the base assembly may be pivotally mounted to the second attachment means, and the first attachment means is provided with a bearing surface. In one example, the plurality of substantially vertical deflection members may be connected to the pair of the substantially vertical uprights by one or more connecting members. In one example, the plurality of substantially vertical deflection members contain at least one cut-out, wherein the connecting members are able to pass though the cut-out. In one example, the one or more connecting members is a rod. In one example, an upper end of the deflection assembly is configured with head protection means. In one example, the head protection means may be a cross member spanning at least one pair of vertical uprights, wherein the cross member includes cushioning means. In one example the cushioning means may be a layer of foam. In another example, the cushioning means may be one or more layers of a textile. According to another aspect of the invention, there is provided a method of manufacturing a safety device for the operator of an open-topped vehicle, the safety device being substantially as described above. According to another aspect of the invention, there is provided a method of using a safety device for the operator of an open-topped vehicle, the safety device being substantially as described above. According to another aspect of the invention, there is provided a kit set for a safety device for the operator of an open-topped vehicle, the kitset including: a safety device substantially as described above; and a first attachment means for mounting the safety device to the open-topped vehicle. In one example, the kit set may also include a second attachment means for mounting the safety device to the open-topped vehicle. According to another aspect of the invention, there is provided an open-topped vehicle including a safety device for the operator of the vehicle, the safety device substantially as described above. Further aspects of the technology, which should be considered in all its novel aspects, will become apparent to those skilled in the art upon reading of the following description which provides at least one example of a practical application of the technology. 6. Brief Description of the Drawings One or more embodiments of the technology will be described below by way of example only, and without intending to be limiting, with reference to the following drawings, in which: Figure 1 is an isometric view showing the entirety of one example of the safety device in accordance with an aspect of the present invention; Figure 2        is an isometric view showing the body of the safety device of Figure 1; Figure 3        is an isometric view showing a component of the safety device of Figure 1; Figure 4        is a rearward isometric view showing the body of the safety device of Figure 1; and Figure 5        is an isometric view showing the entirety of another example of the safety device in accordance with an aspect of the present invention. 7. Detailed Description of Exemplary Forms of the Technology 7.1. Safety Device An example of the invention in the form of a safety device (generally indicated by arrow 100) for the operator of an open-topped vehicle, such as a ride-on mower (not shown) which is typically used in the agriculture and horticulture industries, is depicted in a perspective view in Figure 1. Reference will be made throughout the remainder of this description to the vehicle being a ride-on mower but this is not meant to be limiting; persons skilled in the art will appreciate that with suitable modifications the safety device 100 may be fitted to other types of open-topped vehicles such as cab-less tractors, quad-bikes and the like. The safety device 100 has a forward end (FE); in use, this would be situated slightly forward of the operator's seating position on the ride-on mower. The safety device has a rearward end (RE); in use, this would be situated slightly rearward of the operator's seating position on the ride-on mower. It will be understood that the operator sits on the ride-on mower facing forwards, which is the primary direction of travel. Thus, any potential hazards to the operator are most likely to happen as the ride-on mower is moving forwards. The safety device 100 as shown includes a main portion in the form of a body 200 that is preferably made of steel or another suitable metal alloy. In some instances, it may alternatively be composed, partially or entirely, of a plastics material or composite. This may be preferable where there are limitations on the weight of the safety device so as to avoid unduly compromising the performance of the ride-on mower to which it is to be mounted. The body 200 consists of a base assembly 202, a deflection assembly 204, a pair of vertical uprights 206a,206b and additional framing members 216a, 216b that collectively define a structure similar to a cage. In use, this cage is positioned over the top of the operating position of the ride-on mower, and therefore covers the operator of said ride-on mower. The safety device 100 also includes a first attachment means 300, and a second attachment means 400; these serve to provide a means by which the body may be mounted to the ride-on mower. The first attachment means typically connects to the ride-on mower at a point behind the operator while the second attachment means connects to the ride-on mower at a point in front of the operator. The features and operation of the invention will be better understood from the ensuing discussion of Figures 2 to 4. The components of the body 200 are best seen in Figure 2 in which the base assembly 202 is shown to comprise of a substantially primary horizontal frame member 208 proximate to the forward end and that includes a curved segment 210 substantially extending away and to the rearward end of the body. As will be appreciated, this serves as a deflection surface for any objects that contact this portion of the body. As seen in Figure 2, the combination of the primary horizontal frame member 208 and curved segment 210 together have a substantially U-shaped profile. However, other profiles having at least a portion configured as a curved segment 210 may be envisaged; for example, the horizontal frame member may be substantially semi-oval in profile. For further protection of the operator of the ride-on mower, additional frame members 216a, 216b, positioned arising upwards from the primary horizontal frame member 208 of the base assembly 202, are present. An additional, substantially horizontal, secondary horizontal frame member 220, vertically displaced upwards from, i.e. superior to, the primary horizontal member 208, is also present. Like the primary horizontal frame member and curved segment 210, this has a substantially U-shaped profile. The respective primary horizontal frame member 208 and the secondary horizontal frame member 220 are linked through the use of a connecting assembly 221 comprising a forward-tri member 221i, mid-tri member 221ii and rear-tri member 221iii. These provide support between the respective horizontal frame members and the additional frame members 216a,216b. The tri-support members are shown as having a square cross-section, however this is not intended to be limiting as they could be formed with other suitable cross-sectional shapes such as circular, channel, I-beam, among others. As previously noted, the primary horizontal frame member 208 of the base assembly 202 may be formed from extrusions of steel, aluminium or another type of metal alloy. The secondary horizontal frame member 220 may be similarly formed. In some instances, some or all of the horizontal frame members may be formed from a suitably robust plastics material or a composite laid over a metal or metal alloy skeleton structure. Although shown as tubular with a circular cross-section, the horizontal frame members may also be any suitable cross-sectional profile known to those skilled in the art, including but not limited to, flat extrusions, rectangular, square, channel, I-beam, among others. It will be appreciated that variations of the body 200 may be envisaged depending on manufacturing criteria. For example in an embodiment not shown, an alternative configuration of the body may be formed using a singular horizontal frame member 208 formed from a length of tubing having a substantially circular cross-sectional configuration. In Figure 4, it will be seen that the pair of vertical uprights 206a,206b shown in the illustrated example extend upwards and away from the forward end of the base assembly 202 in an approximately curved fashion, towards the rearward end of the base assembly. Each upright is formed in two distinct portions; a first forward section 218, favouring the primary horizontal frame member 208, and a second rearward section 219 favouring the secondary horizontal frame member 220. As such, the uprights are inclined, extending rearwardly from the primary horizontal frame member and linking same to the secondary horizontal frame member. The vertical uprights 206a, 206b are connected to the primary horizontal frame member 208 and the secondary horizontal frame member 220 at their respective ends. It should be appreciated that this connection is such that it allows movement of the uprights relative to the respective horizontal frame members 208, 220. This may be through the use of pins or similar passing through loops or hasps provided to each of the horizontal frame members. The forward-tri member 221i, mid-tri member 221ii and rear-tri member 221iii of the connecting assembly 221 of the body 200 converge to a pivot point 223 located on the adjustment assembly 225. The adjustment assembly consists of a D-shaped arrangement of hollow sections, wherein a substantially rearwardly curved adjustment member 227 has a plurality of apertures 229 for locating the pivot point. An adjustment pin 233 anchors the pivot point. Adjustment of the position of the pivot point 223 along the adjustment member 227 changes the angle of the vertical uprights 206a, 206b and the deflection assembly 204, relative to the base assembly 202. This is achieved by removing the adjustment pin 233 and moving the secondary horizontal frame member 220 towards the FE or RE of the safety device 100 as desired. This is advantageous as it allows the user to select a suitable angle for the deflection assembly such that it allows for the operator to be best protected from oncoming debris, based on the operating environment. A lower frame member 231 is provided to the adjustment assembly 225 and follows a similar D-shaped arrangement, positioned outward of the base assembly 202. Although shown as tubular with a circular cross-section, the horizontal frame members may also be any suitable cross-sectional profile known to those skilled in the art, including but not limited to, rectangular, square, channel, I-beam, among others. It will be readily appreciated from the present discussion, that the horizontal frame members 208, 220 and the additional frame members 216a,216b, combine to form the body 200 of the safety device in such a way that in use, the operator is inside a cage-like enclosure having an arc of around 270° both vertically and horizontally. This provides a substantial degree of protection for the operator when operating a ride-on-mower to which the present invention is mounted. Turning back to Figure 2, the respective forward sections 218 of the pair of uprights 206a,206b are substantially parallel to each other. In between these is provided a deflection assembly 204 which, in use, is positioned at a height substantially corresponding to the upper torso and head of the operator. Together with the base assembly 202 and vertical uprights, the deflection assembly is a major protective component of the invention 100. In the illustrated example, the deflection assembly 204, which includes a plurality of deflection members 224, eleven in this instance, is positioned at the forward end of the base assembly 202 between the pair of vertical uprights 206a,206b. Of course, in some examples not shown here, there may be fewer deflection members, particularly if it is preferable to avoid unduly obscuring the forward vision of the operator of the vehicle to which the present invention 100 is to be mounted. As can be seen, the deflection assembly 204 has a curved portion that extends from the base assembly 202 in a vertical and rearward direction. This substantially mimics the shape of the corresponding portions of the vertical uprights 206a,206b, curving upwards and rearwards from the primary horizontal frame member 208 towards the secondary horizontal frame member 220 Additional vertical uprights may be present to provide added structural rigidity to the body as well as additional deflection surfaces. As already explained, in use, the operator's head and upper torso are substantially behind the deflection assembly 204. The presence of the deflection assembly therefore offers some protection for the operator of the ride-on mower; any hanging hazards such as wires, cords or lines and such like would be deflected upwards away from the operator should they contact the safety device 100 while the vehicle is in motion. The vertical deflection members 224 may be configured from a suitable robust plastics material such as high density polyethylene (HDPE) or the like. Lightweight metals may alternatively be used. As shown in Figure 4, the vertical deflection members are connected to the pair of the vertical uprights 206a,206b through the use of several metal rods 226 which pass though appropriately shaped cutouts (not visible) provided to the vertical deflection members. This secures the deflection assembly 204 to the vertical uprights of the safety device 100. Spacers or the like may be used between adjacent vertical deflection members to maintain their spatial distancing. In some instances, the ride-on mower may be used over uneven ground, and as such there may be inadvertent and uncontrolled movement of the operator's head and upper torso such that there may be contact with the body of the safety device 100. As shown in Figure 2, for head protection, the secondary horizontal frame member 220 may be provided with a cylindrical cross member 230 of a foam material. This is applied to the portion of the secondary horizontal frame member that spans the vertical uprights 206a,206b. The inventors have found the elongate foam structures known as "pool noodles" may be particularly useful for this manner of providing head protection. However, it will be appreciated that other forms of head protection could implemented and be of any shape and of any material provided that the material has cushioning properties, such as fabric, sponge, neoprene, aerogel, among others. For example, head protection may be in the form of a cushion secured to the upper portion 219 of the deflection assembly 204 or the vertical uprights 206a,206b. Returning to Figure 1, it will be seen that the first attachment means 300 is provided to the rearward portion of the base assembly 202. In use, this allows for the mounting of the safety device 100 to the ride-on mower. As shown, the first attachment means 300 is in the form of a right-angled bracket 302. A connecting brace 303 is positioned between the first attachment means and acts to provide lateral rigidity to the safety device 100. The connecting brace includes a mounting bracket 305 which attaches the connecting brace to the first attachment means. The mounting bracket includes a series of holes 307 for mounting the safety device to different locations on an open-topped vehicle. Now turning to Figure 4, where it can be seen that the safety device 100 includes the use of a strut 318, in this case a gas strut, to aid the user in the raising and lowering of the body 200 of the safety device. The strut is attached to the first attachment means 300 at one end, and to the lower frame member 231 at the other end. Returning to Figure 1, the safety device 100 also includes a second attachment means 400 for the safety device; this is positioned forward of the operating position of the ride-on mower, proximate its front end. As best seen in Figure 3, the second attachment means 400 includes an upper end 402, a support surface 404 for the base assembly 202 of the safety device 100, and a lower end 406 that includes attachment clamps 408a,408b for mounting to the chassis of the ride-on mower. Although reference is made to the attachment clamps being mounted to the chassis, persons skilled in the art will appreciate that this is not meant to be limiting; the attachment clamps may be readily configured and arranged to engage with another portion of the ride-on mower, such as its front mudguards, if present. The upper end 402 is configured to act as a support surface 404 for the base assembly 202 in use; as can be seen it forms a L-shaped structure against which the base assembly rests in use. This helps spread the load of the safety device 100 so that its weight is not entirely borne by the first attachment means 300. A locking mechanism 410 that is complementary to the support surface 404 is shown. The locking mechanism is configured to receive the primary horizontal frame member 208 of the base assembly 202. This is actuated through the use of a handle 412. The locking mechanism rotates around a pivot point 414 and acts to secure the body 200 of the safety device 100 in use. The handle provides a means to actuate the locking mechanism into the locked position (shown) and the unlocked position (not shown) which involves rotation towards the rearward end of the safety device. lower end 406 of the second attachment means 400 is configured to include an adjustable portion 416. This allows the user to better mount the safety device 100 to the ride-on mower and optimise its position in use. The lower end 406 of the second attachment means 400 is configured with two lower support members 422a,422b, substantially vertically oriented, connecting the attachment clamps 408a,408b to the support surface 404. In this example, a central support member 424, in the form of a panel, is positioned between the two lower support members, and extends from the attachment clamps partway to the support surface. This provides some structural rigidity to the second attachment means, which may be important when acting as a support for the weight of the safety device 100. It should be appreciated that in some examples, not shown here, the base assembly 202 may be pivotally mounted to the second attachment means 400 rather than the first attachment means 300; in this example, the first attachment means may be provided with a support surface that receives the rearward end of the base assembly. In some examples, certain safety equipment, such as emergency on-off switches may be provided to the second attachment means 400. It will be appreciated that in use, the second attachment means is relatively close to the feet of the operator when in use, and as such could be a convenient location for a foot-operable emergency on-off switch. 7.2. Alternative Embodiments Other embodiments of the invention may be readily envisaged and one such example of the safety device 100 is shown in Figure 5. Large portions of this embodiment function substantially as explained above, but there are some differences as explained in the following discussion. In the example of Figure 5, the base assembly 202 is comprised of two separate horizontal frame members 208i, 208ii, that are stacked in a vertical arrangement, separated by a plurality of linking members 214. The frame members forming the base assembly, and the upright members 206a, 206b are formed from flat extrusions of metal, cut and folded to shape. The uprights 206a and 206b are provided with rear extensions 206c, 206d that curve outwards and rearwards towards the rearward end of the base assembly; these assist in forming the cage that protects the user. An upright portion 304 of the attachment means 300 that attaches the safety device 100 to the ride-on mower (not shown) in use includes a hinging pin (not shown) that is received in an appropriately configured receptacle at the rearward end of the base assembly 202 to form a hinge 306. This hinge allows the body 200 of the safety device 100 to be raised and lowered to permit the operator to access and exit the operating position of the ride-on mower. Persons skilled in the art will readily implement other ways in which the body of the safety device may be connected to the attachments to allow pivotal movement of the body. The upright portion 304 of the bracket 302 is provided with a series of mounting holes 308, through which the hinging pin (not shown) is intended to pass; this gives the operator the ability to adjust the height of the body 200 of the safety device 100 relative to the bracket; this may be necessary to optimise the fit of the safety device relative to the operator or alternatively to provide sufficient clearance for other portions of the ride-on mower. This may help in adapting the invention with different makes and models of ride-on mowers. The horizontal portion 310 of the bracket 302 is fixed to a rectangular plate 312 with an angled elongate slot 314. In the illustrated example, this slot acts as a handle, providing a means for the user to raise and lower the safety device relative to the ride-on mower, during the installation / mounting process. In some instances not shown here, the handle may be a lever or the like mounted to the plate. Apertures 316 are provided to the plate which allow the bracket, and therefore the safety device 100, to be mounted to the ride-on mower. Several apertures are provided for greater robustness of the mounting arrangement when installed. These apertures may also be arranged to provide options for selecting a preferred height for the safety device. Persons skilled in the art will readily appreciate there are a number of alternative ways in which the first attachment means may be configured for use with different types of vehicles. In this example, it will be seen that the curvature of the upright members 206a, 206b and the deflection assembly 204 (several metal rods linking the individual members of the deflection assembly not shown although the holes 228 through which these rods pass are visible) is relatively extensive compared to the embodiment of Figures 1 to 4. It will be understood that a curved member may have a horizontal component and a vertical component; in Figures 1 to 4, the curvature of the upright members 206a, 206b and the deflection assembly 204 is such that it has a greater vertical component than a horizontal component, i.e. the curvature is relatively steep and closer to an upright condition than a horizontal condition. In contrast, in Figure 5, the horizontal component and vertical components of the curvature of the upright members 206a, 206b and the deflection assembly 204 are more equal resulting in a gentler curvature that is more at a midpoint between an upright condition and a horizontal condition. Other embodiments with differing curvature profiles may be envisaged. 7.3. Use of the Invention As will be apparent from the preceding discussion, the usage of the illustrated invention of Figure 1 is straightforward. The safety device 100 is attached to the ride-on mower (or other vehicle) with which it is to be used by the first attachment means 300 and is supported by the upper portion 402 of the second attachment means 400, which is also attached to the ride-on mower. The relative positions of the first 300 and second attachment means 400 is able to be adjusted to suit the operator and / or make or model of the ride-on mower. This may be achieved through mounting the safety device 100 at the appropriate height setting, selected from the plurality of apertures 229 and mounting holes 307 provided, and is particularly advantageous for retrofitting to existing vehicle. The base assembly 202 of the safety device 100 can be pivoted about the first attachment means 300, in the vertical and rearward direction, away from the second attachment means 400, to allow the operator of the vehicle to enter and exit as required. However, in an alternative configuration not shown here, the base assembly may be pivotally connected to the second attachment means, such that the safety device can be raised and lowered in the vertical and forward direction. 7.4. Other Remarks Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like, are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense, that is to say, in the sense of "including, but not limited to". 5 The entire disclosures of all applications, patents and publications cited above, if any, are herein incorporated by reference. Reference to any prior art in this specification is not, and should not be taken as, an acknowledgement or any form of suggestion that that prior art forms part of the common general knowledge in the field of endeavour in any country in the world. 10 The technology may also be said broadly to consist in the parts, elements and features referred to or indicated in the specification of the application, individually or collectively, in any or all combinations of two or more of said parts, elements or features. Where in the foregoing description reference has been made to integers or components having known equivalents thereof, those integers are herein incorporated as if individually set forth. 15 It should be noted that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications may be made without departing from the spirit and scope of the technology and without diminishing its attendant advantages. It is therefore intended that such changes and modifications be included within the present technology.

Claims

8. CLAIMSWhat we claim is:

1. A safety device for the operator of an open-topped vehicle having a front end facing a primary direction of travel for the vehicle, the vehicle also including an operating position for the operator, wherein the safety device includes a forward end that corresponds to the front end of the vehicle and a rearward end, and wherein the safety device includes:a base assembly having a substantially horizontal frame member, having a curved segment substantially at or proximate to the forward end, and wherein the base assembly is configured to be mounted to an attachment means configured and arranged to be fixed to the open-topped vehicle;at least one pair of substantially vertical uprights mounted to the base assembly, wherein each upright has a curved segment extending upwards and away from the forward end to the rearward end of the safety device;a forward deflection assembly including a plurality of substantially vertical deflection members, wherein the forward deflection assembly is positioned substantially between an upper end of one pair of the substantially vertical uprights; and wherein the forward deflection members include a curved segment extending away from the forward end to the rearward end of the safety device; andwherein, in use, the forward end of the safety device is located in front of the operating position for the operator of the vehicle and the rearward end of the safety device is located behind the operating position for the operator of the vehicle.

2. The safety device of claim 1, wherein the horizontal frame member has a substantially U-shaped or semi-oval profile in plan view, the curved segment substantially corresponding to the closed portion of the profile.

3. The safety device of either claim 1 or claim 2, wherein the base assembly is formed from one horizontal frame member.

4. The safety device of either claim 1 or claim 2, wherein the base assembly is formed from two or more horizontal frame members, each having a curved segment extending away from the forward end to the rearward end of the safety device.

5. The safety device of any one of claims 1 to 4, wherein the one or more horizontal frame members is made from either;i)       rectangular bar section; orii)      tubular section.

6. The safety device of any one of any one of claims 1 to 5, wherein the one or more horizontal frame members are mounted to one or more of the pair of vertical uprights.

7. The safety device of any one of claims 1 to 6, wherein the area between the base assembly and the pair of vertical uprights is substantially covered by an impact resistant sheet of a substantially transparent material.

8. The safety device of any one of claims 1 to 7, wherein the at least one pair of substantially vertical uprights mounted to the base assembly include a first curved segment extending upwards and away from the forward end to the rearward end of the safety device and a second curved segment extending upwards and away from the rearward end to the forward end of the safety device.

9. The safety device of claim 8, wherein the respective curved segments meet at their uppermost ends.

10. The safety device of any one of claims 1 to 9, wherein the safety device includes the attachment means that is mounted at or proximate the operating position of the vehicle with which the safety device is to be used.

11. The safety device of any one of claims 1 to 10, wherein the attachment means is provided substantially at or proximate to the rearward end of the safety device and mounts same at or proximate the rear of the operating position.

12. The safety device of any one of claims 1 to 10, wherein the attachment means is provided substantially at or proximate the forward end of the safety device and mounts same at or proximate the front of the operating position.

13. The safety device of any one of claims 1 to 12, wherein the base assembly is configured to be pivotally movable when mounted to the attachment means.

14. The safety device of any one of claims 1 to 13, wherein the attachment means includes a mounting bracket configured and arranged for the purpose of attaching the safety device to the vehicle.

15. The safety device of claim 14, wherein the mounting bracket is arranged to allow the safety device to be attached to the vehicle at different heights.

16. The safety device of any one of claims 1 to 15, wherein the safety device includes a second attachment means configured to be mounted to the other of the forward end or rearward end of the vehicle with which the safety device is to be used.

17. The safety device of claim 16, wherein the second attachment means is configured to be amounted to the appropriate end of the open-topped vehicle with which the invention is to be used.

18. The safety device of either claim 16 or claim 17, wherein the second attachment means is configured with an upper end provided with a bearing surface for the forward end of the safety device.

19. The safety device of any one of claims 16 to 18, wherein a locking mechanism is provided to the second attachment means, which secures the base assembly of the safety device to the bearing surface of the second attachment means.

20. The safety device of claim 19, wherein the locking mechanism is provided with a lever to aid in the actuation of the locking mechanism.

21. The safety device of any one of claims 1 to 20, wherein the base assembly is pivotally mounted to the second attachment means, and the first attachment means is provided with a bearing surface.

22. The safety device of any one of claims 1 to 21, wherein the plurality of substantially vertical deflection members are connected to the pair of the substantially vertical uprights by one or more connecting members.

23. The safety device of any one of claims 1 to 22, wherein the plurality of substantially vertical deflection members contain at least one cut-out, wherein the connecting members are able to pass though the cut-out.

24. The safety device of any one of claims 1 to 23, wherein the one or more connecting members is a rod.

25. The safety device of any one of claims 1 to 24, wherein an upper end of the deflection assembly is configured with head protection means.

26. The safety device of any one of claims 1 to 25, wherein the head protection means is a crossmember spanning at least one pair of vertical uprights, wherein the cross member includes cushioning means.

27. The safety device of claim 26, wherein the cushioning means is:• a layer of foam; and / or• one or more layers of a textile.

28. A method of manufacturing a safety device, for the operator of an open-topped vehicle, the safety device as claimed in any one of claims 1 to 27.

29. A method of using a safety device for the operator of an open-topped vehicle, the safety device as claimed in any one of claims 1 to 27.

30. A kit set for a safety device for the operator of an open-topped vehicle, the kitset including:a safety device as claimed in claim 1; anda first attachment means for mounting the safety device to the open-topped vehicle.

31. The kit set for a safety device of claim 30, wherein the kit set includes a second attachment means for mounting the safety device to the open-topped vehicle.

32. An open-topped vehicle including a safety device for the operator of the vehicle, the safety device as claimed in any one of claims 1 to 25.

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