GB2536934A

GB2536934A - Improvements in or relating to a multi-terrain traversal device

Info

Publication number: GB2536934A
Application number: GB1505628.6A
Authority: GB
Inventors: Hedges Robert
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-01
Filing date: 2015-04-01
Publication date: 2016-10-05
Anticipated expiration: 2035-04-01
Also published as: GB201505628D0; GB2536934B

Abstract

A multi-terrain traversal device or walking stick 100, has a plurality of releasably attachable feet portions 106 which can be chosen to suit the terrain to be traversed. A connector element 108 comprises first and second connector portions 124a, 126a connecting the shaft portion 104 to the selected foot portion 106. A locking mechanism 128 may be provided for securing the first and second connector portions in an engaged configuration. An articulating element 110 may be provided between a shaft portion 104a and the foot portions 106 of a shaft element 104. The articulating clement 110 allows the foot portion 106 to articulate relative to the upper shaft portion 104a. One said foot portion 106 has a plurality of elements 118 extending downwards and outwards from a central portion 120, each of which terminate in a ground-engagement element 114 featuring a ground spike 122.

Description

Improvements In Or Relating To A Multi-Terrain Traversal Device The present invention relates to a multi-terrain traversal device, particularly, but not necessarily exclusively for the use by those predisposed to Nordic walking, hiking and other outdoor activities, as well as the infirm, elderly or patients. The improvements include a modular design to allow the quick-release replacement of a foot attachment and/or the addition of an articulation to increase or promote ground contact.

Walking sticks and poles are utilised all around the world, and by a multitude of genders and age groups, for the purposes of providing additional stability whilst walking, hiking, or otherwise exercising or traversing across variable land surfaces.

Walking sticks arc particularly well known for their use by the elderly or infirm for the provision of support whilst walking. By using a walking stick, the user effectively extends their arm in order to provide an extra point of contact with the ground, ensuring that there are always two parts of their body directly or indirectly abutting the ground at all times.

The walking stick or pole also enables the user to stand more comfortably, much in the same way that a camera is more stable on a tripod than if it were balanced on only two legs. Furthermore, as there is always one additional point of contact with the ground, the user' s weight is spread over a greater area, lowering the load on each individual limb.

Hikers and ramblers also commonly utilise sticks or poles to allow them to grip the ground and remain stable whilst on slippery, uneven, or otherwise unstable surfaces.

The underlying principle in this case is much the same as in that of traditional walking sticks whereby, were the hiker or rambler to lose footing, the extra point of contact allows greater bodily control and can prevent falling compared to a hiker not using a stick or pole.

However, use of multi-terrain traversal devices such as sticks and poles is subject to some drawbacks, which are reasonably well known. Firstly, as walking poles generally end in a single point, they are prone to getting lodged or stuck in any sort of ground fissure such as cracks, crevices, and parched or dry ground. These can include gaps between rocks, in pavement deformities or in the spaces between cobblestones. A walking pole getting stuck in this way can not only by unfortunate and uncomfortable for a user, but can also he dangerous, especially if the user is unstable on their feet. Therefore such an issue can result in falls and injuries, such as stressed joints, sprained ligaments, cuts, grazes, and even broken bones.

Additionally, as many walkers and hikers will know, walking poles can sink and become stuck in wet, boggy, or otherwise deformable ground. This situation can he simply inconvenient or could subsequently become dangerous if the hiker was to lose balance as a result. This loss of balance is particularly prevalent when a walker is reliant on secure placement of the walking pole and this placement is compromised.

Thirdly, the small surface area in contact with the ground at any one time can lead to problems if the stick or pole is utilised to transmit force to the ground, which is used particularly when used uphill or when walking in a strenuous manner, such as whilst training. As the pole is used, it will naturally rotate relative to the ground as the user moves forwards. Therefore, when the stick is in a non-vertical position, the use of the stick to transmit force to the ground can create slippage if the horizontal component of the force is greater than that of friction. This can be dangerous in much the same way as discussed previously, when the walker is absolutely reliant on a secure footing for the pole. In these situations, it can be of paramount importance that the pole is planted firmly on the ground, and remains undisturbed in order that uninterrupted walking or traversal may be maintained in safety.

Whilst it is possible to purchase walking sticks or poles with different ground-contacting ends, such as a single spike for use in firm ground, or a rubber grommet end for use on paved or otherwise hard surfaces, these have their drawbacks.

For instance, a user may have to carry many different walking sticks in order to allow them to be well prepared for any surface they might have to traverse, or may otherwise have to compromise safety, comfort, and/or performance in order to choose the stick best able to cope with a variety of surfaces.

It is also a common problem for the spike of the stick to slip whilst in contact with the ground. This can be caused by the reliance on a secure plant of a single-pointed pole or by movement of the pole during walking, which can undermine the security of the pole footing. An exacerbating factor is that whilst the user walks, with the stick in contact with the ground, the stick must rotate relative to the ground. This results in a varying contact area between the foot of the stick and the ground. As such, when there is a low contact area, walking sticks can be prone to slipping. This can also cause the stick or pole to sink when used on ground which is not sufficiently firm.

It is an object of the present invention to ameliorate or overcome the above problems, by providing a walking pole/stick designed so as to include features which mitigate or substantially obviate the issues as discussed.

According to a first aspect of the invention there is provided a modular multi-terrain traversal device comprising: a shaft element; a plurality of different foot portions for contacting the ground; and a connector element having first and second connector portions interposable between at least a portion of the shaft element and each foot portion; the first and second connector portions being releasably interconnectable to enable selective interengagement of the different foot portions.

The term multi-terrain traversal device is used, herein and throughout, to refer to traversal devices which allow a user to transmit force from their upper bodies during walking as well as walking aids to support a user during walking or other mobile activities. Multi-terrain traversal devices particularly include such devices as walking and trekking poles, and walking sticks, but may also refer to other devices which aid stability of a user, such as walking frames. These possibilities are intended to be illustrative, but not exhaustive, of the types of devices included in the term multi-terrain traversal device. Particularly, the term is intended to encompass those devices which are applicable for use on multiple different terrains.

Modularity of a multi-terrain traversal device means that individual components may he interchanged, removed, or replaced due to different intended uses, damaged portions and maintenance; or for any other reason. This makes the multi-terrain traversal device more versatile and customisable.

Preferably, the second connector portion may be receivable within the first connector portion. Such a formation of the connector element may increase the strength and rigidity of the connection thus making the multi-terrain traversal device more rigid and therefore safe.

It may be beneficial for the connector clement to include a locking mechanism for securing the first and second connector portions in an engaged configuration.

If the connector element were to disconnect at an undesirable time, it could lead to injury for a user, or loss of components, therefore a locking mechanism acts as both a safety and security feature.

The locking mechanism may include at least one locking element for interengaging with the first and second connector portions. The locking element provides further stability and safety for the locking mechanism.

In a preferable embodiment, the locking mechanism may further include an abutment element, slidably disposed on the connector element, the abutment element being biased such that, in a locked configuration, the abutment element abuts the locking element, preventing or limiting the locking element from disengaging.

Preferably, the connector element may further include a biasing spring for biasing the abutment element in the engaged position.

The abutment element provides added security to the locking mechanism, further lowering the chances of unwanted disconnections occurring. A biasing spring ensures 20 that the abutment element does not move without the influence of a user.

Advantageously, sliding of the abutment element in a direction against the force of the biasing spring may release the locking element, allowing disconnection of the first and second connector portions.

According to a second aspect of the invention there is provided an articulated multi-terrain traversal device comprising: a shaft clement; a foot portion; and an articulating element being interposable between at least a portion of the shaft element and the foot portion for enabling articulating motion between the said portion of the shaft clement and the foot portion.

Enabling a multi-terrain traversal device to articulate allows the foot portion to remain in its original planted state throughout the movement of the device, or to keep a larger proportion of itself in contact with the ground at any one moment, minimising the risks of slipping and thus giving a user more confidence in the device.

Preferably, the articulating element may include first and second articulating portions, the first articulating portion being in rigid communication with at least a portion of the shaft clement and the second articulating portion being in rigid communication with the foot portion.

Having an articulating element including these features gives it enhanced stability, allowing motion only in predetermined directions.

It may be beneficial for one of the first and second articulating portions to be at least partially receivable within the other of the first and second articulating portions. This arrangement may further increase stability of the articulation.

In a preferable embodiment, the articulating element may include a resistive element for the production of a force resistive to articulating motion of at least a portion of the shaft element relative to the foot portion.

The resistive element prevents the articulating element from rotating entirely freely, which could make it more difficult to confidently place the multi-terrain traversal device on the ground in use.

Advantageously, the resistive element may comprise an inner friction plate in communication with one of the shaft element and foot portion, and an outer friction plate in communication with the other of the shaft element and foot portion, the inner and outer friction plates being in frictional communication with each other.

It may be advantageous to combine the features of the first and second aspects of the invention, to provide a multi-terrain traversal device with both modular and articulating characteristics.

According to a third aspect of the invention there is provided a method of improving the stability of a user on a desired one of a plurality of different surfaces comprising the steps of: a] providing a modular multi-terrain traversal device in accordance with the first aspect of the invention and a plurality of interchangeable foot portions suitable for use on different surfaces; h] selecting a foot portion suitable for use on the said desired one surface from the plurality of interchangeable foot portions and removably connecting it to the modular multi-terrain traversal device.

According to a fourth aspect of the invention there is provided a method of improving the stability of a user during walking comprising the steps of: a] providing an articulated multi-terrain traversal device in accordance with the second aspect of the invention; b] the user placing the foot portion of the articulated multi-terrain traversal device on a surface; c] the user providing a force to a portion of the shaft element during a stride; d] the force causing articulation of the said portion of the shaft element relative to the foot portion, thus keeping the foot portion in stable contact with the surface during the stride.

According to a fifth aspect of the invention there is provided a modular multi-terrain traversal device system comprising at least one shaft element and a plurality of foot portions, each of the said plurality of foot portions being independently and removably attachable to the said at least one shaft element.

According to a sixth aspect of the invention there is provided a modular multi-terrain traversal device system comprising a plurality of shaft elements and at least one foot portion, each of the said plurality of shaft dements being independently and removably attachable to the said at least one foot portion.

According to a seventh aspect of the invention there is provided a sink-resistive end for use with a multi-terrain traversal device, comprising: a central portion; at least one arm element extending from the central portion; and a sink-resistance membrane in communication with the or each arm element for preventing or limiting submergence of the sink-resistive end.

The use of a sink-resistive end enables the multi-terrain traversal device to be used on soft, wet, sandy, snowy, or boggy ground with limited or no sinking of the multi-terrain traversal device occurring.

Preferably, the sink-resistance membrane may he flexible. Added flexibility allows the membrane to extend over obstacles, ensuring that stability of the multi-terrain traversal device is maintained.

According to an eighth aspect of the invention there is provided a multi-armed traversal device for providing enhanced ground contact comprising: a shaft element; and a foot portion at one end of the shaft element; the foot portion having a central portion and at least three arm elements extending radially therefrom.

The multi-armed nature of the traversal device prevents or limits the device becoming lodged in fissures in the ground and spreads the applied load from the users walking actions.

Advantageously, the multi-aimed traversal device may further comprise at least one ground-engagement element associated with each arm element.

It may be preferable for the foot portion to have four arm elements extending radially therefrom. More preferably, a first said arm element may extend in a first direction and a second said arm element may extend in a direction opposing or substantially opposing the said first direction.

These arrangements give enhanced ground contact, thus spreading the load evenly.

Beneficially, the third and fourth said arm elements may be radially disposed around the central portion at an acute angle relative to the first said arm element. Having three arm elements extending in a substantially forward direction ensures that there is a good 20 footing by which to transmit force when pushing off using the device.

In an advantageous arrangement the third and fourth said arm elements arc radially disposed around the central portion at angles equal and opposite to one another relative to the first arm element. This can ensure that weight is spread evenly and thus stability is maintained.

Preferably, the angles may he between 10 and 80 degrees. More preferably, the angles may be between 25 and 65 degrees, and most preferably the angles may be substantially 45 degrees. These angles give the best. combinations of load distribution and stability in use The invention will now be more particularly described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 shows a perspective view of a first embodiment of a multi-terrain traversal device with both modular and articulated features, in accordance with the present invention; Figure 2 depicts a side view of a distal end of the multi-terrain traversal device of Figure 1 showing the connector element in cross-section; Figure 3 is a depiction of the a front view of the distal end of the multi-terrain traversal device of Figure 1 with the connector element and articulating clement shown in cross-section; Figure 4A is a side view of a further embodiment of a distal end of a multi-terrain traversal device, having a sink-resistance membrane, in accordance with the present invention; Figure 4B is a plan view of the embodiment of Figure 4A; Figures 5A and 5B show two further embodiments of distal ends of multi-terrain traversal devices, in cross-section, in accordance with the present invention.

A first embodiment of an articulated and modular multi-terrain traversal device 100 is depicted in Figure 1. The multi-terrain traversal device 100 comprises an ergonomic head element 102, a shaft element 104 extending longitudinally from the head element 102, and one foot portion 106 of a plurality of different foot portions, which forms part of the shaft clement 104 when connected. The foot portion 106 is attached to an upper shaft portion 104a by way of a connector element 108, in this case preferably a quick-release push-fit collar-lockable connector, and additionally or alternatively an articulating element 110.

The connector clement 108 allows the multi-terrain traversal device 100 to be replaced in portions if one part, for instance the foot portion 106, was to break. Additionally, the modularity of the multi-terrain traversal device 100 allows parts to be interchanged to suit the needs of a user. For instance, the foot portion 106 can he interchanged between one kind having a rubber tip which is suitable for walking on paved or tarmacked surfaces, and another kind having a spiked tip, which may he more suitable for off-road uses such as hiking. The rubber tip and spiked tip are just two examples, and other elements forming a selection of possible different detachably mountable foot portions may be utilised.

The upper shaft portion 104a is shown in a first position Pl, denoted by a solid outline of the multi-terrain traversal device 100, and also a second position P2, denoted by a dotted outline of the multi-terrain traversal device 100. It can therefore be seen that the upper shaft portion 104a is able to rotate relative to the foot portion 106 around the articulating element 110. The articulation thus enabled allows the upper shaft portion 104a to rotate between at least its first and second positions Pl. P2, leaving the foot portion 106 undisturbed or substantially undisturbed by the upper shaft portion 104a. The rotation enables a ground-contacting surface 112 of the foot portion 106 to remain in enhanced contact with the ground for an extended period, in use. More particularly, the rotation allows the foot portion 106 to remain in a position substantially the same as when first planted upon the ground.

For example, whilst Nordic walking, it is natural for the user of a walking pole or stick to place the foot portion of the device on the ground with the device itself at an angle just less than vertical relative to the ground, tilted forwards. The pole or stick is then further rotated during the stride of the user, lessening the angle between the pole or stick and the ground. The stick is removed from the ground in preparation for the next stride. This rotation of the stick relative to the ground generally results in a changing contact area between the pole or stick and the ground. If this contact area is too small, or the force transmitted through the stick too large, the frictional force may not be strong enough to hold the foot of the device in place, and slipping can ensue. Clearly. this can he dangerous, especially considering use by the old and infirm, and when used on difficult terrain conditions where the pole is essentially utilised as a critical extra body part to propel and support the body.

The articulating clement 110, which interconnects the upper shaft portion 104a and foot portion 106 of the multi-terrain traversal device 100 of Figure 1, minimises the risks from this kind of slipping. Minimisation of slipping is achieved by allowing the multi-terrain traversal device 100 to pivot at a point above that which is in contact with the ground. As such, ground-engagement elements 114, disposed on the bottom of the foot portion 106, may keep a larger portion of its ground-contacting surface 112 in contact with the ground, throughout the pace of the user. With a greater portion of the ground-contacting surface 112 in contact at any one time, a larger area is able to transmit frictional forces, which ensures greater stability of the multi-terrain traversal device 100 relative to the ground.

A distal end 116 of the first embodiment of such a multi-terrain traversal device 100 is shown in Figure 2, which shows the foot portion 106, in articulated connection to the upper shaft portion 104a, together making the shaft element 104. The articulating element 110 is interposed between the foot portion 106 and the connector element 108, providing the articulation. The arrangement of the distal end 116 is suited for providing a more secure and firmer platform of contact between the foot portion 106 and the underlying terrain.

Four arm elements 118, of which only two are visible, extend radially downwards from a central portion 120 of the foot portion 106 and each terminate in a ground-engagement element 114, which in this embodiment is a ground spike 122. Due to the lateral view of the multi-terrain traversal device 100 of Figure 2, only two of the four arm elements 118 are visible. The relative arrangement of the front three arm elements is depicted more clearly in Figure 3. Three of the aim elements 118 extend in a substantially forward direction, whilst the fourth of the four arm elements 118 extends in a substantially backward direction.

This arrangement of a multi-pointed foot portion 106 not only spreads the load of a user across a greater area, adding greater stability, but also acts to prevent or limit the multi-terrain traversal device from becoming lodged in ground fissures or other such cracks or holes. Additionally, even if one arm element 118 were to encounter a fissure, the other arm elements 118 would be likely to avoid said fissure, ensuring that the overall stability of the multi-terrain traversal device 100 is maintained.

The arm elements 118 must extend radially outwards from the central portion 120 in order to have the benefits listed above. However, they do not necessarily have to extend downwards, and therefore may extend in a plane or even upwards, if required.

It is advantageous for the arm elements 118 extending in a substantially forward direction are equally spaced; that is, that the central arm dement 118 is separated by equal angles from the adjacent arm elements 118. These angles are preferably equal, to enhance stability. The resulting angle is preferably acute, such that these three said arm elements 118 are substantially forward facing, and is more preferably between 10 and 80 degrees. Even more preferably, the angle may he between 26 and 65 degrees, and in the present embodiment is substantially 45 degrees.

The articulating element 110, which interconnects the central portion 120 of the foot portion 106 with the connector element 108, enables articulation about a rotational axis of the articulating element 110. The remaining features of the articulating element 110 are described in depth in relation to Figure 3, where the mechanism is visible in a cross-sectional view.

Box A, the bounds of which are defined by a dotted line, shows a cross-sectional view of the connector element 108, which couples the upper shaft portion 104a and articulating element 110 coaxially. The connector element 108 comprises a first connector portion 124a, herewith a male connector portion 126a, which extends vertically from the articulating element 110, and a second connector portion 124b, herewith a female connector portion 126b, which extends vertically from the upper shaft portion 104a in an opposing direction to the male connector portion 126a.

The male connector portion 126a, which is substantially cylindrical, is receivable within the female connector portion 1266, which is substantially tubular, such that it is restrained from movement in the horizontal plane. The male connector portion 126a is further restrained vertically by a locking mechanism 128, comprising a locking element 130, which is substantially toroidal and receivable within a complimentarily-shaped locking indentation 132. The locking indentation 132 is disposed around a radial extent of the male connector portion 126a approximately half-way along its longitudinal extent.

This locking element 130, in use, therefore intersects both the first and second connector portions 124a, 124b, restricting movement in a vertical direction. An abutment element 134 is provided, which substantially encloses the second connector portion 124h and, when in an engaged position, as shown, provides a restricting force upon the locking element 130, such that it is positively retained within the locking indentation 132. As such, the locking mechanism 128 can be releasably engaged with the first and second connector portions 124a, 124b held relative to one another. When the locking mechanism 128 is required to be disengaged, the abutment element 134 can be slid upwards into a recess 136. In this position, the abutment element 134 will no longer retain the locking element 130 within the locking indentation 132 and the male connector portion 126a will be removable from the female connector portion 126b.

The abutment element 134 is biased to he in the engaged position by a biasing spring 138, which abuts a recessed portion 140 of the second connector portion 124b. The biasing spring 138 requires a force in order to disengage the abutment element 134, and thus allow the first and second connector portions 124a, 124h to be disengaged. As such, the chance of accidental disengagement is minimised.

Additionally provided at a distal end 142 of the first connector portion 124a is a fu-st stabilisation element 144a of a stabilising mechanism 146. A second stabilisation element 144h of the stabilising mechanism 146, physically engageable with the first stabilisation element 144a, is in communication with the upper shaft portion 104a. The stabilising mechanism 146 prevents or limits the male connector portion 126a, and therefore the articulating element 110 and foot portion 106, from rotating relative to the upper shaft portion 104a, when the locking mechanism 128 is engaged.

By releasing the locking mechanism 128, before rotating the foot portion 106 relative to the upper shaft portion 104a, the relative alignments of the upper shaft portion 104a and foot portion 106 can be selected. The stabilising mechanism 146 is then re-engaged once the first and second connector portions 124a, 124b are re-connected. The second stabilisation element 1446 of the stabilising mechanism 146 is biased into engagement with the first stabilisation element 144a by a spring element 148, interposed between the second stabilisation element 1446 and the upper shaft portion 104a. As such, the stabilising mechanism 146 is subject to a force from the spring element 148 which maintains engagement, in use. For clarity, the stabilising mechanism 146 in Figure 2 is shown in a disengaged position, such that the features of the mechanism 146 can be more easily seen.

In the present embodiment, the engaging surfaces 150 of the first and second stabilisation elements 144a, 144b have a continuously toothlike form about the rotational axis of each stabilisation element 144a, 144b, with the individual teeth of the respective engaging surfaces 150 being complementary to each other. These teeth 152 on the engaging surfaces 150 therefore inter-engage which prevents relative articulating motion of the two stabilisation elements 144a, 144b. In Figure 2, it can be seen that the teeth 152 are relatively sharp, with the uppermost and lowermost points of the teeth 152 being pointed, however this is not intended to he limiting, and it is equally applicable for the engaging surfaces to have sinusoidal, or any other type of undulating or uneven surface. Likewise, the teeth may be dispensed with completely, and instead the engaging surfaces may be held in position by any suitable attachment means, which may include friction, snap fixtures, or any other form of attachment.

Figure 3 depicts the same embodiment of the distal end 116 of the multi-terrain traversal device 100 as in Figure 2, but from a front view. The articulating element 110 is shown in cross-section, such that the inner workings are visible. In the cross-sectional portion. shown within box B. it is apparent that the articulating element 110 is formed of, in broad terms, a first and second articulating portion 154a. 154b. The second articulating portion 154b is rigidly connected to the second connector portion 124b.

This second articulating portion 154b is then hingably connected with the first articulating portion 154a, a part of which is rigidly connected to the foot portion 106.

An axle element 156, having proximal and distal ends 158a, 158b, is interposed between the first and second articulating portions 154a, 154b, providing the articulation.

The axle element 156 comprises a screw portion 160 at the proximal end 158a, which connects screw-threadably to the first articulating portion 154a of the articulating element 110. First and second bearing elements 162a, 162h are interposed between an outer surface 164 of the axle element 156 and an inner surface 166 of the second articulating portion 154b so as to allow low friction rotation of the articulating element 110 and also ensure that the axle element 156 remains disposed centrally within the second articulating portion 154b.

The first bearing element 162a abuts the screw portion 160 towards the proximal end 158a of the axle element 156, whilst the second hearing element 162h is disposed substantially towards the distal end 158b of the axle element 156, so as to provide good support along the length of the axle element 156. Inner and outer friction plates 168a, 168b are positioned approximately mid-way between the first and second hearing elements 162a, 162b, forming a resistive element.

The friction plates 168a, 168h are toroidal in shape, each having a rectangular cross-section. The inner friction plate 168a is in communication with and extends radially outwards from the outer surface 164 of the axle element 156. Conversely, the outer friction plate 168h is in communication with and extends radially inwards from the inner surface 166 of the second articulating portion 154h. The inner friction plate 168a does not contact the second articulating portion 154b, and the outer friction plate 168b does not contact the axle element 156. Contacting surfaces 170 of the inner and outer friction plates 168a, 168h are in contact, so as to produce a resistive frictional force when the articulating element 110 is articulated.

By adjusting the friction plates 168a, 168b and their interaction, the amount of resistance to movement may be altered. Generally, this resistance may be predetermined at the point of manufacture, but may also he configured to he adjusted by a user, if required.

The resistance to motion of the articulating element 110 firstly means that, when the multi-terrain traversal device 100 is lifted, the foot portion 106 stays in the same orientation relative to the shaft element 104. However, when the foot portion 106 is in contact with the ground, the motion of the user will provide enough force to overcome the friction between the friction plates 168a, 168h. Secondly, the resistance gives more stability to the multi-terrain traversal device 100 than if the articulating element 110 rotated freely.

Whilst the resistive element is hereby provided by two friction plates 168a, 168b, it could foreseeably he formed of a greater number of friction plates. Alternatively the resistive element could comprise some other form of movement-damping means for providing resistance to free articulation of the articulating element such as a frictional mechanism or a movement damping system such as an elastic element.

Forming the final parts of the articulating element 110, the axle element 156 is enclosed within the articulating element 11(1 by a first and second end cap 172a, 172h. These end caps 172a. 172b cover the proximal and distal ends 158a, 158b of the axle clement 156, respectively. As such, the axle element 156, bearing elements 162a, 162b and friction plates 168a, 168b are protected from the ingress of dirt, dust, or other particles or liquids. As such, the articulating element 110 may he prevented from being damaged or requiring excessive servicing. However, the end caps 172a, 172b may be removable, such that the articulating element 110 may be cleaned, or parts fixed or replaced where necessary. The caps 172a, 172b may otherwise he sealed to the articulating dement 110, either removably or permanently, to further prevent damage to the articulating element 110.

Whilst the figures thus far have only depicted a multi-terrain traversal device with a single foot portion, it is also possible to provide separate foot portions, either removably attachable to a shaft element or else permanently fixed. A second embodiment of a foot portion 206 is depicted in Figures 4A and 4B.

With similar or identical features having similar or identical references, this embodiment of a foot portion 206 differs from the first embodiment in that it comprises four arm elements 218, each terminating in a ground-engagement element 214, which is a ground spike 222. Additionally, stretched between the arm elements 218, is a substantially rectangular sink-resistance membrane 274.

The sink-resistance membrane 274 is held in position through physical interaction with the arm elements 218 at each of its four vertices 276. By stretching between the arm elements 218, the sink-resistance membrane 274 ensures a much higher area of ground contact for the multi-terrain traversal device 200, which prevents the multi-terrain traversal device 200 from sinking and/or becoming partially submerged when used on soft, boggy, sandy, or snowy terrain. The ground spikes 222 enable the multi-terrain traversal device 200 to grip the ground, whilst the sink-resistance membrane 274 helps to ensure the foot portion 206 remains in its optimal or substantially optimal position at ground-level.

The sink-resistance membrane 274 is preferably flexible in order that it can deform over raised objects or similar obstacles without interfering with the contact between the ground-engagement elements 214 and the ground.

In the present embodiment, the sink-resistance membrane 274 is formed of a fine mesh of a material such as nylon or other synthetic polymer. However, it could also be formed of perforated plastics or metal, or any other suitable material, which has the necessary strength and durability.

The sink-resistance membrane 274 need not necessarily he extended from four arm elements 218, but could also be extended from three or five or more ground-engagement elements. Similarly, if the rigidity of the sink-resistance membrane is sufficient, it could extend from two or even one ground-engagement element, and have a substantially self-supporting structure.

Additionally, the arm elements may be arranged in any position. For instance, it may be preferable to have one arm element extending forward in the direction of walking, with two or three arm elements extending at different angles in the opposite direction, or vice versa. The arrangement and number of the provided arm elements may be altered depending on the individual design of the foot portion in question and the situation for which it is devised.

It is also foreseeable for a single arm element to be provided which extends around the whole, or a portion of, the perimeter of the sink-resistance membrane. The arm element may be elongate in a similar way to as previously described or could otherwise form a conical extent which extends downwards from the central portion of the foot portion to the or each ground-engagement element.

In Figures 4A and 4B, the connector element is not shown. However, this connector element may he attached to the foot portion 206, such that it can be connected to a shall element. It may also be formed integrally with an elongate shaft element.

Two further embodiments of a distal end 316, 416 of a multi-terrain traversal device, including a foot portion 306, 406 are shown in Figures 5A and 5B. These embodiments do without the articulating element, as they consist of only one ground-engagement element 314, 410, which is connected to the upper shaft portion 304a in a parallel manner via an elongate foot portion 306, 406. However, these embodiments clearly include the connector element 308, such that it may he removably attached to the shaft element of a modular multi-terrain traversal device.

In each of the two embodiments, the foot portion 306, 406 tapers between the connector element 308 and the ground-engagement element 314, 410. Two different ground-engagement elements 314, 414 are depicted. In Figure 5A, the ground-engagement element 314 is a ground spike 322, for enhanced gripping of non-hard ground such as grass or mud. Figure 5B instead shows a rubber tip 478, which is better adapted to gripping hard surfaces such as tarmac or concrete. These are only two of a number of possibilities of ground-engagement element, and therefore other types of ground-engagement element, which may be suited for different purposes, will be apparent. Ground-engagement elements on any of the embodiments may be removable or interchangeable such that the foot portion can be customised for a particular use.

Whilst each embodiment has been described with a particular set of included features, these combinations are not intended to be limiting. As such, it will be clear to the person skilled in the art that each of the features described may be used individually or in combination, to provide different devices. Additional features may also be present. in addition to, or instead of, others. For instance, the connector element may be disposed of from between the articulating element and upper shaft portion and a connector element inserted between the shaft portion and the head element, in order to allow the head element to he changed. Alternatively, each of the different embodiments of the foot portion may be used with any of the different embodiments of shaft element, including one or more of the articulating element and/or connector element without departing from the scope of the present invention.

Positional terms, such as "above, "lateral", "horizontal", "vertical", and the like, have been used herein to describe the features of the embodiments with reference to the enclosed Figures. As such, the terms describe the relationships as disclosed in the Figures, and are not intended to be limiting. It would be obvious to the skilled person that the embodiments could he presented in different orientations, and as such the relative positional terms will vary dependent on these orientations.

It is therefore possible to provide a modular multi-terrain traversal device, having a shall element. including an upper shall portion and a foot portion, and a quick-release connector element interconnecting the two. The connector element allows one foot portion to be exchanged for a second, different, foot portion, therefore allowing the multi-terrain traversal device to be optimised for the weather and ground surface.

It is also possible to provide an articulated multi-terrain traversal device, having a shaft element, including an upper shaft portion and a foot portion, and an articulating element interconnecting the two. The articulating element allows the foot portion to rotate relative to the upper shaft portion, such that the foot portion may keep a larger ground-contacting surface on the ground during walking motion.

Furthermore, the features of the articulated and modular multi-terrain traversal devices may he incorporated into one device, having all of the advantages of both. Such devices, being articulated and/or modular are particularly well suited to traversing many different terrains, and may be utilised for fitness or support purposes, each of which are benefitted by the improved stability of the device.

The traversal device benefits, amongst other groups, Nordic Walkers, Hill Walkers, Trekkers, Pursuit use, and Racing enthusiasts. Therefore, although not primarily intended for solely fitness purposes, the device can be beneficially used during or with fitness activities. As the device utilises different foot portions and thus the poles can he interchanged across a range of poles as necessity dictates and dependent on the activity required, including fitness activities.

The traversal device also benefits walkers and runners in terms of health, overall fitness, stability particularly in tough conditions, security of planted foot, and safety particularly in undulating or difficult terrain.

The words 'comprises/comprising' and the words 'having/including' when used herein with reference to the present invention are used to specify the presence of stated features, integers, steps or components, but do not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

It is appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also he provided in combination in a single embodiment. Conversely, various features of the invention which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination.

The embodiments described above are provided by way of examples only, and various other modifications will he apparent to persons skilled in the field without departing from the scope of the invention herein described and defined.

Claims

Claims 1. A modular multi-terrain traversal device comprising: a shaft element; a plurality of different foot portions for contacting the ground; and a connector element having first and second connector portions interposable between at least a portion of the shaft element and each foot portion; the first and second connector portions being releasably interconnectable to enable selective interengagement of the different foot portions.
2. A modular multi-terrain traversal device as claimed in claim I, wherein the second connector portion is receivable within the first connector portion.
3. A modular multi-terrain traversal device as claimed in claim 1 or claim 2, the connector element including a locking mechanism for securing the first and second connector portions in an engaged configuration.
4. A modular multi-terrain traversal device as claimed in claim 3, wherein the locking mechanism includes at least one locking clement for interengaging with the first and second connector portions.
5. A modular multi-terrain traversal device as claimed in claim 4, wherein the locking mechanism further includes an abutment element, slidably disposed on the connector element, the abutment element being biased such that, in a locked configuration, the abutment clement abuts the locking clement, preventing or limiting the locking element from disengaging.
6. A modular multi-terrain traversal device as claimed in claim 5, wherein the connector element further includes a biasing spring for biasing the abutment element in the engaged position.
7. A modular multi-terrain traversal device as claimed in claim 6, wherein sliding of the abutment element in a direction against the force of the biasing spring releases the locking element, allowing disconnection of the first and second connector portions.
8. A modular multi-terrain traversal device as claimed in any one of claim I to 7, further including an articulating element being interposable between at least a portion of the shaft element and the foot portion for enabling relative articulating motion of the shaft element and foot portion.
9. A modular multi-terrain traversal device as claimed in claim 8, wherein the articulating element includes first and second articulating portions, the first articulating portion being in rigid communication with at least a portion of the shaft clement and the second articulating portion being in rigid communication with the foot portion.
10. A modular multi-terrain traversal device as claimed in claim 9, wherein one of the first and second articulating portions is at least partially receivable within the other of the first and second articulating portions.
11. A modular multi-terrain traversal device as claimed in any one of claims 8 to 10, wherein the articulating element includes a resistive element for the production of a force resistive to articulating motion of the shaft element relative to the foot portion.
12. A modular multi-terrain traversal device as claimed in claim 11, wherein the resistive element comprises an inner friction plate in communication with one of the shaft element and foot portion, and an outer friction plate in communication with the other of the shaft element and foot portion, the inner and outer friction plates being in frictional communication with each other.
13. A modular multi-terrain traversal device substantially as hereinbefore described with reference to Figures 1, 2, 3, 5A, and 5B.
14. An articulated multi-terrain traversal device comprising: a shaft element; a foot portion; and an articulating element being interposable between at least a portion of the shaft element and the foot portion for enabling articulating motion between the said portion of the shaft element and the foot portion.
15. An articulated multi-terrain traversal device as claimed in claim 14, wherein the articulating element includes first and second articulating portions, the first articulating portion being in rigid communication with at least a portion of the shaft element and the second articulating portion being in rigid communication with the foot portion.
16. An articulated multi-terrain traversal device as claimed in claim 15, wherein one of the first and second articulating portions is at least partially receivable within the other of the first and second articulating portions.
17. An articulated multi-terrain traversal device as claimed in any one of claims 14 to 16, wherein the articulating element includes a resistive element for the production of a force resistive to articulating motion of at least a portion of the shaft element relative to the foot portion.
18. An articulated multi-terrain traversal device as claimed in claim 14, wherein the resistive element comprises an inner friction plate in communication with one of the shaft element and foot portion, and an outer friction plate in communication with the other of the shaft element and foot portion, the inner and outer friction plates being in frictional communication with each other.
19. An articulated multi-terrain traversal device as claimed in any one of claims 14 to 218, further comprising a connector element having first and second connector portions and interposable between at least a portion of the shaft element and the foot portion; the first and second connector portions being releasably interconnectable.
20. An articulated multi-terrain traversal device as claimed in claim 19, wherein the second connector portion is receivable within the first connector portion.
21. An articulated multi-terrain traversal device as claimed in claim 19 or claim 20, the connector element including a locking mechanism for securing the first and second connector portions in an engaged configuration.
22. An articulated multi-terrain traversal device as claimed in claim 21, wherein the locking mechanism includes at least one locking element for interengaging with the first and second connector portions.
23. An articulated multi-terrain traversal device as claimed in claim 22, wherein the locking mechanism further includes an abutment element slidably disposed on the connector element, the abutment element being biased such that, in a locked configuration, the abutment element abuts the locking element, preventing the locking element from disengaging.
24. An articulated multi-terrain traversal device as claimed in claim 23, wherein the connector element further includes a biasing spring for biasing the abutment element in the engaged position.
25. An articulated multi-terrain traversal device as claimed in claim 24, wherein sliding of the abutment element in a direction against the force of the biasing spring releases the locking element, allowing disconnection of the first and second connector portions.
26. An articulated multi-terrain traversal device substantially as hereinbefore described with reference to Figures 1, 2, 3, 4A, and 4B.
27. A method of improving the stability of a user on a desired one of a plurality of different surfaces comprising the steps of: a] providing a modular multi-terrain traversal device as claimed in any one of claims 1 to 13 and a plurality of interchangeable foot portions suitable for use on different surfaces; b] selecting a foot portion suitable for use on the said desired one surface from the plurality of interchangeable foot portions and removably connecting it to a shaft of the modular multi-terrain traversal device.
28. A method of improving the stability of a user during walking comprising the steps of: a] providing an articulated multi-terrain traversal device in accordance with any one of claims 14 to 26; 1)] the user placing the foot portion of the articulated multi-terrain traversal device on a surface; c] the user providing a force to a portion of the shaft element during a stride; d] the force causing articulation of the said portion of the shaft element relative to the foot portion, thus keeping the foot portion in stable contact with the surface during the stride.
29. A sink-resistive end for use with a multi-terrain traversal device, comprising: a central portion; at least one arm element extending from the central portion; and a sink-resistance membrane in communication the/or each arm element for preventing or limiting submergence of the sink-resistive end.
30. A sink-resistive end as claimed in claim 29, wherein the sink-resistance membrane is flexible.
31. A multi-armed traversal device for providing enhanced ground contact comprising: a shaft clement; and a foot portion at one end of the shaft element; the foot portion having a central portion and at least three arm elements extending radially therefrom.
32. A multi-armed traversal device as claimed in claim 31, further comprising at least one ground-engagement element associated with each arm element.
33. A multi-armed traversal device as claimed in claim 31 or claim 32, wherein the foot portion has four arm elements extending radially therefrom.
34. A multi-armed traversal device as claimed in claim 33 wherein a first said arm element extends in a first direction and a second said arm element extends in a direction opposing or substantially opposing the said first direction.
35. A multi-armed traversal device as claimed in claim 34, wherein third and fourth said arm elements arc radially disposed around the central portion at an acute angle relative to the first said arm clement.
36. A multi-armed traversal device as claimed in claim 34 or claim 35, wherein the third and fourth said arm dements are radially disposed around the central portion at angles equal and opposite to one another relative to the first arm element.
37. A multi-armed traversal device as claimed in claim 36, wherein the angles are between 10 and 80 degrees.
38. A multi-armed traversal device as claimed in claim 36, wherein the angles are between 25 and 65 degrees.
39. A multi-armed traversal device as claimed in claim 36, wherein the angles are substantially 45 degrees.