Patent Application
20240181356
The present invention relates generally to recreational slides and, more particularly, to a slide system including a ride vehicle for use with a recreational slide having a slide surface provided with a dry lubricant material.
Recreational slides, such as dry slides and water slides, provide a popular form of entertainment activity. In that regard, conventional dry or water slides include a slide surface down which a rider descends (i.e., slides) for entertainment. The speed at which the rider descends down the slide is often determinative of the level of entertainment experienced by the rider. For most riders, a fast slide speed (i.e., a fast rate of descent down the slide) is more thrilling compared to a slow slide speed (i.e., a slow rate of descent down the slide), and therefore is more desirable. To this end, maintaining a low coefficient of friction between the rider or a ride vehicle that supports the rider and the slide surface provides for a fast and exciting slide.
There is a notable difference in slide speed between a water slide and a dry slide. In particular, water slides are faster as a result of water flow down the slide surface, which in some cases can propel the rider down the slide. Further, the water flow lubricates the slide surface which reduces the coefficient of friction between the rider or any ride vehicle being used and the slide surface. To this end, the coefficient of friction between a rider (or ride vehicle) and the slide surface of a water slide may be within a range of between 0.05 to 0.2, and is typically about 0.1.
A dry slide is considered to be any slide that is free of any fluid or wet lubricant flowing down the slide surface and between a rider or the ride vehicle and the slide surface. A dry slide, as a result of not having a flow of lubricant down the slide surface, typically cannot generate the same slide speed as a same-sized water slide. The coefficient of friction between a rider (or ride vehicle) and the slide surface of a typical dry slide is often within a range of between 0.15 to 0.3, and is typically about 0.25. Furthermore, dry slides are often indoor installations so that they can be used year-round. To that end, height restrictions imposed by the ceiling of a building in which the slide is installed necessitate slides having a shorter height, which can further limit the slide speed of a rider.
Thus, there is a need for a dry recreational slide system that can achieve slide speeds equivalent to, or better than, a water slide for the same or similar sized slide. In particular, it is desirable to achieve improved slide speeds for dry slides without the use of a flow of fluid down the slide surface that flows between the rider and/or the ride vehicle.
According to an embodiment to the present invention, a recreational slide system is provided. The recreational slide system includes a slide and a ride vehicle configured to support a rider down the slide. The slide includes a slide body with a non-wet lubricated slide surface that extends between a top entrance of the slide and a bottom exit of the slide. The ride vehicle includes a fabric layer that forms a top surface configured to contact the rider and a mesh layer that forms a bottom surface configured to contact the slide surface. The coefficient of friction between the mesh layer of the ride vehicle and the non-wet lubricated slide surface may be within a range of between about 0.03 to about 0.2, and particularly within a range of between about 0.05 to about 0.12. In one aspect, the coefficient of friction is in terms of kinetic coefficient of friction.
According to one aspect of the present invention, the slide surface may include a dry lubricant material. For example, the dry lubricant material may comprise a dry lubricant coating over the slide surface. In one aspect, the dry lubricant coating includes a thickness that is within a range of between about 1 micron to about 5 micron. According to another aspect of the present invention, the slide body includes a base wall and a pair of sidewalls and the dry lubricant coating may cover a sliding surface of the base wall. The dry lubricant coating may further cover at least a portion of a sliding surface of the pair of sidewalls.
According to yet another aspect of the present invention, the dry lubricant material may include a resin, a lubricant, a thermal conductor, and a hardener. In particular, the dry lubricant material may include 20% to 30% by weight of the resin, 30% to 50% by weight of the lubricant, 1% to 5% by weight of the thermal conductor, and 20% to 30% by weight of the hardener. For instance, the resin may be a silicon-based epoxy resin. Additionally, the lubricant may be polytetrafluoroethylene. In one aspect, the thermal conductor may be copper. In another aspect, the hardener may be an anhydride-based or an amine-based catalyst.
According to one aspect of the present invention, the mesh layer of the ride vehicle may include a weave of threads formed of monofilament synthetic fibers. For instance, the monofilament synthetic fibers may be a polyamide monofilament structure such as Nylon. In one aspect, the weave of threads may include a plurality of weft threads each having a thread diameter within a range of between 0.1 mm to 0.6 mm and a plurality of warp threads each having a thread diameter within a range of between about 0.1 mm to about 0.6 mm. In yet another aspect, the plurality of warp threads may extend along the ride vehicle in a lengthwise direction and the plurality of weft threads may extend along the ride vehicle in a widthwise direction. In one aspect, the mesh layer may include a plurality of interstitial openings that define an open area of the mesh layer. The open area of the mesh layer may be within a range of between about 35% to about 50%.
According to another embodiment of the present invention, a non-wet lubricated recreational slide is provided. The recreational slide includes a slide body with a slide surface that extends between a top entrance of the slide and a bottom exit of the slide. The slide surface includes a dry lubricant coating that comprises a resin, a lubricant, a thermal conductor, and a hardener. According to one aspect of the present invention, the dry lubricant coating includes 20% to 30% by weight of the resin, 30% to 50% by weight of the lubricant, 1% to 5% by weight of the thermal conductor, and 20% to 30% by weight of the hardener. According to another aspect, the slide body includes a base wall and a pair of sidewalls, and the dry lubricant coating may cover a sliding surface of the base wall. In yet another aspect, the dry lubricant coating may cover at least a portion of a sliding surface of the pair of sidewalls.
According to another embodiment of the present invention, a ride vehicle configured to support a rider down a non-wet lubricated recreational slide is provided. The ride vehicle includes an elongate body that extends between a first end and an opposite second end. The body includes a central core positioned between a fabric layer that forms a top surface of the ride vehicle that is configured to contact the rider and a woven mesh layer that forms a bottom surface of the ride vehicle that is configured to contact the non-wet lubricated recreational slide. The ride vehicle further includes a pair of handles attached to the fabric layer adjacent the first end of the ride vehicle.
According to one aspect of the present invention, the woven mesh layer includes a weave of threads formed of monofilament synthetic fibers. For example, the monofilament synthetic fibers may be a polyamide monofilament structure such as Nylon, and preferably Nylon 6 (polycaprolactam). In another aspect, the mesh layer includes a plurality of interstitial openings that define an open area of the mesh layer. For example, the open area of the mesh layer may be within a range of between about 35% to about 50%. In yet another aspect, the mesh layer includes a plurality of weft threads each having a thread diameter within a range of between 0.1 mm to 0.6 mm and a plurality of warp threads each having a thread diameter within a range of between about 0.1 mm to about 0.6 mm. In one aspect, the central core is surrounded by a fabric liner that is positioned between the central core and the fabric layer and the woven mesh layer.
Various additional features and advantages of the invention will become more apparent to those of ordinary skill in the art upon review of the following detailed description of one or more illustrative embodiments taken in conjunction with the accompanying drawings.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate one or more embodiments of the invention and, together with the general description given above and the detailed description given below, serve to describe the one or more embodiments of the invention.
Embodiments of the present invention are directed to a slide system that includes a dry recreational slide, otherwise referred to as a non-wet lubricated slide, and a ride vehicle that includes a mesh material configured to be positioned between a rider and a slide surface of the slide for sliding down the slide. In one embodiment, the slide surface of the slide includes a dry lubricant material in the form of a coating that cooperates with the mesh material of the ride vehicle to achieve a low coefficient of friction therebetween. The mesh material may form part of an article of clothing, for example, or the ride vehicle may be configured to support a rider as they descend down the slide. In that regard, as a rider descends down the slide, the mesh material is in contact with the slide surface, and more particularly the dry lubricant material of the slide surface, such that a coefficient of friction at interfaces between surfaces of the mesh material and the slide surface is within a range of between about 0.03 to about 0.2, and particularly within a range of between about 0.05 to about 0.12, depending on factors such as a weight of the rider, for example. As used herein relative to the coefficient of friction, “about” is intended to mean +/−10%. These and other aspects of the present invention will be described in further detail below.
As will be understood by a person skilled in the art, the coefficient of friction between the ride vehicle and the slide surface is the ratio of the frictional force between two surfaces to the normal force pressing the surfaces together. That is, Coefficient of Friction (μ)=Force of Friction (F)/Normal Force (N). The coefficient of friction between the surfaces of the mesh material and the slide surface may be described in terms of both the static and kinetic coefficients of friction.
Referring now to the figures,
With continued reference to
In use, a rider enters the slide 12 via the top entrance 20, travels down the slide body 16 along the slide surface 18, and subsequently exits the slide 12 at the bottom exit 22. In particular, the rider rides down the slide 12 on the ride vehicle 14 which is configured to be positioned between the slide surface 18 and the rider. As will be described in further detail below, the ride vehicle 14 includes a mesh material that cooperates with the slide surface 18 to achieve an improved, i.e., reduced, coefficient of friction therebetween. The resultant coefficient of between the mesh material of the ride vehicle 14 and the slide surface 18 may be within a range of between about 0.03 to about 0.2, and particularly within a range of between about 0.05 to about 0.12, and in particular about 0.09, and therefore provides the rider with a fast rate of descent down the slide 12 (i.e., speed). As a result of the increased rate of descent down the slide 12, the rider may be launched from the bottom exit 22 of the slide 12 and into the air for aerial play before landing in a designated landing area (i.e., foam pad, inflatable pad, etc.). While the slide 12 may be ridden by a rider using their body alone, the coefficient of friction between the rider and the slide surface 18 will be higher compared to that when using the ride vehicle 14. As a result, the speed that the rider travels down the slide 12 will be slower.
With reference to
With reference to
With continued reference to
According to embodiments of the present invention, the dry lubricant material is an anti-friction or friction reducing material in the form of a dry lubricant coating 34 on the slide surface 18 of the slide 12. In that regard, the formulation for the dry lubricant material that is applied to the slide is a mixture comprising the following: (i) a resin, (ii) a lubricant, (iii) a thermal conductor, and (iv) a hardener, otherwise referred to as a hardening or curing agent. In one embodiment, the dry lubricant material may include a pigment to change a color of the dry lubricant material to match or to be different from a color of the slide body 16, for example. In the embodiment shown, the resin is an epoxy (i.e., epoxide) resin such as Steelflex Epoxy #9X commercially available from Fasco Epoxies Inc (Fort Pierce, FL), for example. In another embodiment, the resin may be a silicone based epoxy polymeric material such as Wearlon-A (e.g., a mixture or blend of epoxy silicone emulsion, 2-propoxyethanol, water, and clay filler) or a PTFE based epoxy material such as Wearlon-B (e.g., a mixture or blend of polyethylene polyamine adduct, 2-propoxyethanol, methyl alcohol, water, and epoxy polytetrafluoroethylene emulsion), both of which are commercially available from Plastic Maritime Corporation (Wilton, NY). To this end, the resin may include silicone or polytetrafluoroethylene (PTFE). In an alternative embodiment, the resin may be a polyester based resin or a polyvinylfluoride based resin, for example.
The lubricity of the dry coating 34 and the resulting coefficient of friction between the slide surface 18 and the ride vehicle 14 is primarily influenced by the lubricant present in the dry lubricant material. In the embodiment shown, the lubricant is a solid (i.e., powderized) lubricant such as PTFE. The lubricant may alternatively be silicone (i.e., powderized). However, the lubricant may be any suitable solid lubricant such as graphite, silicone wax, molybdenum disulfide, or a solid hydrocarbon wax such as polyolefin wax, for example, or a mixture of solid lubricants. To this end, the lubricant is mixed into the resin described above to increase the amount of lubricant in the coating material. The effect of the lubricant on the lubricity of the dry lubricant coating 34 is attributed to the lamellar structure of the polymers which allows the macro molecules of PTFE or silicone, for example, to slip easily along each other. In some circumstances, such as for silicone, for example, the low-friction characteristics may be attributed to a layered structure on the molecular level and the weak bonding between layers. In any event, the powderized lubricant is mixed or blended with a solvent carrier, such as acetone, to then be mixed with the resin, as will be described in further detail below. However, the carrier may be any other suitable material that can be later removed from the dry lubricant material, such as by evaporation, for example.
The thermal conductor provides the dry lubricant material and thus the coating 34 with improved heat dissipation which also influences the coefficient of friction between the sliding surface 18 and the ride vehicle 14. In that regard, the thermal conductor improves heat absorption and heat transfer away from the sliding surface 18 of the slide 12 that is in contact with the ride vehicle 14. The resultant effect is an improved (i.e., reduced) and consistent coefficient of friction between the sliding surface 18 and the ride vehicle 14. In the embodiment shown, the thermal conductor is copper, such as powderized copper. In that regard, the thermal conductor may be mixed or blended with a carrier, such as acetone, to then be mixed with the resin, as will be described in further detail below. The thermal conductor may be any other suitable thermally conductive material, such as aluminum, zinc, iron, metal fibers, etc. To this end, the lubricant, such as PTFE, may further reduce temperature generation between surfaces of the mesh material 46 of the ride vehicle 14 and the slide surface 18, thereby resulting in an improved (i.e., reduced) and consistent coefficient of friction therebetween.
The hardening or curing agent operates as a catalyst to cure the dry lubricant material to the slide surface 18 to form the permanent coating 34 described above. In that regard, the hardening agent may be an anhydride-based, amine-based, polyamide, aliphatic or cycloaliphatic hardening agent, and may comprise amines such as aliphatic amines, for example, acids, acid anhydrides, phenols, alcohols or thiols, for example. To this end, the hardening agent may be the Steelflex #9X Hardener commercially available from Fasco Epoxies Inc (Fort Pierce, FL), for example.
In one embodiment, the composition of the dry lubricant material comprises the following: (i) 50% to 74% by weight of a resin, such as a silicon-based epoxy resin, (ii) 5% to 15% by weight of a lubricant, such as PTFE, (iii) 1% to 5% by weight of a thermal conductor, such as copper, and (iv) 20% to 30% by weight of a hardening or curing agent, such as an anhydride-based or amine-based hardener. In an alternative embodiment, the dry lubricant material composition may comprise the following: (i) 30% to 54% by weight of a resin, such as a silicon-based epoxy resin, (ii) 5% to 15% by weight of a lubricant, such as PTFE, (iii) 1% to 5% by weight of a thermal conductor, such as copper, and (iv) 30% to 50% by weight of a hardening or curing agent, such as an anhydride-based or amine-based hardener. In another alternative embodiment, the dry lubricant material composition may comprise the following: (i) 20% to 30% by weight of a resin, such as a silicon-based epoxy resin, (ii) 30% to 50% by weight of a lubricant, such as PTFE, (iii) 1% to 5% by weight of a thermal conductor, such as copper, and (iv) 20% to 30% by weight of a hardening or curing agent, such as an anhydride-based or amine-based hardener. However, depending on the desired drying and solidification time for the coating 34, as little as 10%, or as much as 50% by weight of the hardening or curing agent may be used in the above-described embodiments.
In another embodiment, the composition of the dry lubricant material comprises the following: (i) 50% to 74% by weight of a resin, such as a PTFE-based epoxy resin, (ii) 5% to 15% by weight of a lubricant, such as silicone, (iii) 1% to 5% by weight of a thermal conductor, such as copper, and (iv) 20% to 30% by weight of a hardening or curing agent, such as an anhydride-based or amine-based hardener. In an alternative embodiment, the dry lubricant material composition may comprise the following: (i) 30% to 54% by weight of a resin, such as a PTFE-based epoxy resin, (ii) 5% to 15% by weight of a lubricant, such as silicone, (iii) 1% to 5% by weight of a thermal conductor, such as copper, and (iv) 30% to 50% by weight of a hardening or curing agent, such as an anhydride-based or amine-based hardener. In another alternative embodiment, the dry lubricant material composition may comprise the following: (i) 20% to 30% by weight of a resin, such as a silicon-based epoxy resin, (ii) 30% to 50% by weight of a lubricant, such as silicone, (iii) 1% to 5% by weight of a thermal conductor, such as copper, and (iv) 20% to 30% by weight of a hardening or curing agent, such as an anhydride-based or amine-based hardener. However, depending on the desired drying and solidification time for the coating 34, as little as 10%, or as much as 50% by weight of the hardening or curing agent may be used in the above-described embodiments.
The dry lubricant material according to the present invention is prepared by mixing the components together using any conventional mixing apparatus, such as a powered mixer or stirrer, for example. In that regard, the lubricant and the thermal conductor are mixed into or blended into a solvent carrier, such as acetone, to form a first intermediate mixture. The first intermediate mixture is then mixed or blended into the resin to form a second intermediate mixture. The second intermediate mixture is then mixed or blended with the hardening or curing agent to form the dry lubricant material which can then be applied to the slide surface 18. To this end, the hardening or curing agent is mixed or blended into the second intermediate mixture immediately prior to applying the dry lubricant material to the slide surface 18 of a formed slide 12. To this end, the hardening agent may be mixed or blended into the second intermediate mixture 30 minutes prior to the dry lubricant material being applied to the slide surface 18, for example.
The dry lubricant material may be applied to the slide surface 18 of a formed slide 12 by spraying, rolling, roller coating, or brushing the dry lubricant material onto the slide surface 18 to form the coating 34. Once the dry lubricant material is applied to the slide surface 18, the dry lubricant material is let to cure to form the dry coating 34 having a specific thickness T. Curing of the dry lubricant material includes air drying of the material. In that regard, the dry lubricant material may be partially cured after 4 hours of air drying, and fully cured after 48 hours of air drying, for example. During curing of the dry lubricant material, volatile components such as the acetone carrier, for example, are removed from the dry lubricant material via evaporation. The slide surface 18 may be wiped clean or otherwise pretreated to improve the adhesion and the life of the dry lubricant material and coating 34.
Having now described certain details of the dry lubricant material which forms the dry lubricant coating 34 on the slide surface 18 of the slide 12 of the slide system 10, details of the ride vehicle 14 of the slide system 10 that incorporates a mesh 46 material in accordance with an embodiment of the present invention will now be described. As shown in
As shown in
Referring now to
In the embodiment shown, the warp and weft threads 70, 72 of the mesh material 46 are formed of a polyamide monofilament structure, such as Nylon 6 (otherwise referred to as polycaprolactam), which proved during testing to yield the lowest coefficient of friction in combination with the dry lubricant coating 34. However, the warp and weft threads 70, 72 may be formed from other types of polyamide monofilament structures, or other materials such as polyvinylidene fluoride, polyester, polyethylene, polypropylene, PTFE, or UHMWPE, for example.
With continued reference to
In developing the dry lubricant material and the mesh material 46, performance tests and analysis was performed using a model of the slide system 10 described above. In particular, SOLIDWORKS Simulations of the model were ran to determine the performance of the slide system 10. The results of one of the SOLIDWORKS Simulations is shown in
The coefficient of friction between surfaces of the mesh material 46 and the slide surface 18 may be determined using the American Society for Testing and Materials International (ASTM) Coefficient of Friction ASTM D1894 standard test method (July, 2023), which may be used to determine both kinetic (moving) and static (starting) coefficient of friction of one surface being dragged across another. The ASTM D1894 test method can be found at www.astm.org. For the ASTM D1894 test, the material specimen is attached to a sled of defined weight. This sled is pulled across another surface at a speed of 150 mm/minute. The force required to start the sled is measured to get the static friction. The force required to maintain the motion of the sled is measured to get the kinetic friction.
With reference now to
While the invention has been illustrated by the description of various embodiments thereof, and while the embodiments have been described in considerable detail, it is not intended to restrict or in any way limit the scope of the appended claims to such detail. Thus, the various features discussed herein may be used alone or in any combination. Additional advantages and modifications will readily appear to those skilled in the art. The invention in its broader aspects is therefore not limited to the specific details and illustrative examples shown and described. Accordingly, departures may be made from such details without departing from the scope of the general inventive concept.
The present application is a continuation of U.S. application Ser. No. 18/349,347, filed Jul. 10, 2023, claiming the filing benefit of U.S. Provisional Application Ser. No. 63/381,818, filed Nov. 1, 2022, the disclosures of each of which are incorporated herein by reference in their entireties.
| Number | Date | Country | |
|---|---|---|---|
| 63381818 | Nov 2022 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 18349347 | Jul 2023 | US |
| Child | 18442609 | US |
