Patent Application
20220105420
This patent application claims the benefit of priority under 35 U.S.C. 119 of GB Patent Application No. 2015651.9, filed on Oct. 2, 2020, the contents of which are hereby incorporated by reference for all purposes as if fully set forth herein.
The present invention relates to the protection of the sidewall & edges of sports boards, especially snowboards.
Numerous sports employ board-shaped equipment, i.e. generally thin and rigid planar panels. Typically, the person engaging in the sport must stand or be supported on the board whilst engaged in the sport. Examples include snowboarding, skiing, surfing, skateboarding and the like.
Often, the sport must be carried out at specific locations, such as mountainous areas with significant snowfall, or coastal areas susceptible to wave activity. As a result, many of those who engage in the sport need to travel in order to reach the location in question, taking their equipment with them to and/or from the location. This raises the risk of damage during transit, especially during air travel as the board must be entrusted to airport staff for loading on and off the aircraft. The personal experience of one inventor is that impacts to a snowboard whilst in transit through airline baggage can severely damage the snowboard. In one case, the snowboard had been subjected to an impact directly to the snowboard sidewall and steel edge, which resulted in an indentation to the steel edge rim of the snowboard and a separation of the various layers which form the (laminated) snowboard.
Damage such as this may be difficult to repair and (even if possible) may still leave the user uncertain as to the integrity and usability of the board; it supports the weight of the user during energetic manoeuvres and is thus subject to mechanical stresses in use, which it must withstand. A failure could lead to injury for the user and thus it is important that the user has confidence in the mechanical integrity of the board.
It is not generally possible for an individual traveller to ensure the smooth handling in transit of their sports board. Most snowboard bags (for example) are made of a polyester/nylon material outer and have limited padding to protect against impact—typically in the form of thin foam only. Their principal function is to keep equipment together, as opposed to providing protection. Hard plastic cases are available, but are bulky and heavy 10 (thus adding to airline costs); generally airline carriers are only willing to offer damage protection to sporting goods when placed in a hardened case.
The present invention seeks to provide an easily applied (and removed) protector for sports boards which is effective in limiting the prospects for damage to the board, especially during airline transit, but also general transportation and postal/shipping of new snowboards, in most cases where a snowboard is being transported it is vulnerable to damage.
We have identified that the principal risk is to the sidewall and edge of the board, as this is the part of the board that is most likely to suffer an impact during handling.
The present invention therefore provides an edge protector for a sports board in the form of a bead of a resilient material having a cross-section comprising a central portion and, extending therefrom in one direction, a tapering impact-absorbing section and, extending from the central portion in the opposing direction, a pair of convergent leg sections for engaging an edge of the board.
The central portion and the impact-absorbing section together form a triangular cross-section, which is particularly suited to receiving and dissipating an impact. The triangular section can be a hollow triangular section to reduce weight and tailor the impact response. The central portion can form one side of the triangle and the impact-absorbing section can then be provided by the remaining two sides of the triangle. The wall thickness of the hollow triangular section is preferably between about 4 mm and about 6 mm. The exact size will determine the overall properties of the protector and can be adjusted in the light of the strength of the material which has been selected, the overall dimensions of the protector, and the level of impact that is to be protected against. In the context of a snowboard, and silicone with a Shore Hardness of 65, we find that 4 mm for the majority of the triangular section is appropriate. The wall forming the side of the triangle defined by the central portion preferably varies in thickness, being thicker at one end than the other.
Generally, it is easier to fit the protector in place if one leg of the pair extends beyond the other leg, effectively catching the base of the snowboard opening separating the two legs and thus enabling the user to follow a clear path. Regardless, the leg sections ideally have a cross-sectional thickness of between 2 mm and 4.5 mm; they can be narrower at their tip than at their base to allow that part to flex more easily. The legs essentially wrap onto the base and top layers, holding the protector in place on the snowboard.
The bead is preferably formed by extrusion, which is one way of allowing the cross-section of the bead to be substantially constant along its length. Silicone provides an ideal resilient material, and a Shore A hardness of between 62 and 68 provides a suitable combination of factors as noted below.
The sports board can be a snowboard, a ski, a surfboard, a body board or a skateboard, or any similar board.
The invention also relates to the combination of a sports board, and an edge protector as defined above, and to a sports board to the edge of which such an edge protector is fitted.
An embodiment of the present invention will now be described by way of example, with reference to the accompanying figures.
A snowboard can vary in appearance, but in most cases the sidewall dimensions vary only very little between the various manufacturers. The sidewall is the section which has been created when the top and bottom of the board is formed with a number of layers sandwiched together between them. The top layer usually covers a smaller surface area than the bottom layer and therefore the top layer is set back/offset from the bottom/base. This is critical to ensuring the steel base edge of the board is in contact with snow or ice at the point of a turn to ensure stability and grip. A snowboard is tapered—thicker in the middle and becoming thinner towards the nose and tail to ensure greater flexibility. The thickness of the sidewall is typically about 10 mm in the middle of the board and about 4 mm at the edges.
The majority of snowboards have the same round shape at the nose and tail, however some are designed differently to allow for deeper snow conditions or different style/type of ride. Common variations include a longer pointed nose, or a fish tail (similar to a surfboard) at the rear.
The design shown in the figures is able to hold position around the majority of snowboard shapes. It is in the form of an elongate extruded bead of industrial grade silicone with a Shore A hardness of 65, a grade selected for providing the most effective blend of strength, grip, and flexibility. We have determined that a hardness of 62 or 62.5 to 67.5 or 68 is acceptable, with 65 being the target for this product. The properties of silicone offer flexibility, varying degrees of strength, hardness, and impact absorption which work to ensure long term durability and addresses the fundamental objective of protecting the board. The Shore hardness range noted above combines the necessary hardness to meet the protective requirements with a degree of flexibility that enables the protector to meet the required shape and grip.
The processes for extruding Silicone are well characterised and will be familiar to those skilled in that art. Generally, it requires that the silicone is forced through a custom die which has a unique shape through which the silicone is forced. The shape of the die can be cut using a CNC machine.
Two legs 22, 24 extend from the other side of the central section 14, directed in the opposite direction to the triangular impact-absorbing section 12 in order to allow the protector 20 to be attached to the base and top surface covering the sidewall and steel edge of a snowboard. The legs are in the form of strips of 4 mm thick silicone, tapering in their outer halves 26, 28 down to approximately 2.3 mm. In the relaxed state shown in
The central section 14 has a non-uniform thickness, becoming approximately 50% thicker toward the base of the shorter leg 24 to act as an ‘anti rocking’ structure that prevents lateral movement when the protector is fitted. Thus, at the base of the longer leg 22 the central section 14 is (minimum) 4 mm thick, which increases steadily toward the base of the shorter leg 24 to a thickness of approximately 6 mm.
Prototypes (of varying hardness) were tested using metal hammers to investigate the resilience of each prototype to the board's edge when subjected to force. The two factors that were most relevant were the point at which the silicone split against the steel rim of the board, and the resilience of the protector to the force of the hammer. We found the breaking point of the silicone at Shore A 65 was not easily reached, requiring a very strong force to eventually split the product against the board's edge. We also found that if the surface or inner seam of the protector splits slightly due to an impact, then that is still acceptable as the integrity of the board is still protected by the remainder of the triangular section.
Silicone offers a number of benefits in practice, including a resilience risk of general damage (not just in transit), stable properties over a wide range of temperatures, resistance to fungal or moisture damage, ease of application even with repeated usage, a pleasant aesthetic image and feel, and the ability to retain its properties over a long time without the need for regular maintenance.
It will of course be understood that many variations may be made to the above-described embodiment without departing from the scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2015651.9 | Oct 2020 | GB | national |
