WO2022240299A1 - Trampolines, components thereof and methods of manufacture and assembly - Google Patents

Trampolines, components thereof and methods of manufacture and assembly Download PDF

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Publication number
WO2022240299A1
WO2022240299A1 PCT/NZ2022/050054 NZ2022050054W WO2022240299A1 WO 2022240299 A1 WO2022240299 A1 WO 2022240299A1 NZ 2022050054 W NZ2022050054 W NZ 2022050054W WO 2022240299 A1 WO2022240299 A1 WO 2022240299A1
Authority
WO
WIPO (PCT)
Prior art keywords
top rail
trampoline
leg
connector
aperture
Prior art date
Application number
PCT/NZ2022/050054
Other languages
French (fr)
Inventor
Matthew Eric Tubbs
Original Assignee
JumpFlex Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JumpFlex Limited filed Critical JumpFlex Limited
Publication of WO2022240299A1 publication Critical patent/WO2022240299A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B5/00Apparatus for jumping
    • A63B5/11Trampolines
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/0054Features for injury prevention on an apparatus, e.g. shock absorbers
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B71/00Games or sports accessories not covered in groups A63B1/00 - A63B69/00
    • A63B71/0054Features for injury prevention on an apparatus, e.g. shock absorbers
    • A63B2071/009Protective housings covering the working parts of the apparatus

Definitions

  • the present invention relates to trampolines, components thereof, and methods of manufacture and assembly. Background to the Invention
  • Trampolines are regularly used for various reasons including exercise, gymnastics, rehabilitation and entertainment. They can range in size from around 1 metre across to sizes exceeding 4 metres across.
  • trampolines are commonly shipped in a disassembled state to reduce shipping costs.
  • the dissembled trampoline comprises multiple components which are then assembled together by the purchaser.
  • trampoline components which are simple and cost effective to manufacture while also allowing for easy assembly by the purchaser into a useable trampoline.
  • stock inventory of these components is an important consideration.
  • a trampoline has a trampoline mat which is suspended from a support frame by resilient components.
  • the support frame includes some form of structure (henceforth "a top rail") that surrounds the trampoline mat and legs which support the top rail above the ground.
  • the top rail structure is commonly a circular or rectangular shape which is made of two or more segments which are connected together.
  • trampolines There are two common types of trampolines.
  • a standard, or sprung, trampoline uses a plurality of coiled metal springs as the resilient components.
  • a "spring-free" trampoline uses bendable rods, made from a composite material such as fibreglass, as the resilient elements. Either way, the resilient components suspend the mat and provide the elastic and resilient force needed to promote jumping.
  • the trampoline components must be assembled together to provide the finished and complete trampoline.
  • many proprietary systems include components, typically parts of the support frame and / or net poles, which are welded together. Welding has a number of disadvantages such as being a relatively expensive process and prone to failure if done incorrectly. It can also introduce a weak point at which the frame could corrode or otherwise become structurally compromised. Additionally, any protective coatings, such as painting or a powder coating, must be applied after the welding process. That places restrictions on the order in which components can be manufactured. Furthermore, components manufactured using welding can also be difficult to package or ship due to their geometry.
  • trampoline components which can be used across a range of trampoline sizes, thereby reducing the number of part variations required to keep in stock.
  • a trampoline According to a first aspect of the technology, there is provided a trampoline.
  • kit set of components that can be assembled together to form a trampoline.
  • a connector for joining two or more components of a trampoline to each other.
  • a trampoline and components thereof which are able to be manufactured with less or no welding.
  • a trampoline and components thereof which are able to be manufactured with less or tools.
  • a trampoline and components thereof which are able to be manufactured with less or no fasteners such as bolts or screws.
  • a trampoline wherein the trampoline includes: a plurality or series of top rail segments, and
  • the top rail has at least one aperture, and an end of the at least one leg extends into the at least one aperture in the top rail.
  • kit set of parts that can be assembled together to form a trampoline, wherein the kit set includes: a plurality or series of top rail segments which can be connected to each other to in use form a top rail, and at least one leg, wherein the top rail includes at least one aperture, and in use an end of the at least one leg can extend into the aperture in the top rail.
  • the method includes providing a plurality of legs.
  • the plurality of legs are configured to be used with the top rail segments and the top rail segments.
  • the method includes providing at least one connector which is configured to connect an end of one of the top segments to an end of another one of the top rail segments.
  • the connector(s) is configured to also connect an end of one of the top rail segments to an end of another one of the top rail segments.
  • the method includes providing instructions to assemble the components of the kitset.
  • the instructions are provided as a list of written steps, or a video accessible by via an internet connection.
  • the one or more components may be a/the component/s as described herein, e.g. a net, a trampoline mat, resilient elements, net poles, ladder etc.
  • a trampoline which comprises: a plurality of top rail segments that are connected to each other to form a top rail which defines a plane, a plurality of legs which in use support the top rail above the ground, wherein each of the plurality of legs has a respective first end that is connected to the top rail and a respective second end which is located distal to, and below, the plane,
  • the trampoline may comprise a trampoline mat.
  • This trampoline mat may be constructed of a planar sheet of durable material.
  • the trampoline mat may comprise a fabric such as canvas or alternatively a polymer such as polypropylene. It may be advantageous for the trampoline mat to comprise a mesh such as a woven mesh, as the mesh construction may increase the durability of the trampoline mat and / or better allow moisture to drain from the surface.
  • the top rail and trampoline mat may be substantially circular.
  • the top rail which has a shape that is substantially complementary to the shape of the trampoline mat.
  • the top rail may have a ring-like form and the trampoline mat may be circular.
  • the top rail and trampoline mat may have a polygonal shape, i.e. the top rail and / or trampoline mat may be substantially square, rectangular, hexagonal or octagonal, or include a non-polygonal shape such as an oval, or a complex shape having any other suitable combination of polygonal and non-polygonal features.
  • the trampoline may include at least one resilient element.
  • the resilient element may be at least one spring element in the form of an extension or tension spring(s). Flowever, this should not be seen as limiting on the technology.
  • the resilient element(s) may be torsion springs or flexible rods as should be known to those skilled in the art.
  • at least one resilient element may be the trampoline mat.
  • the trampoline mat may be constructed of a resiliently deformable material such as an elastomer.
  • the resilient element(s) of the present technology shall be referred to as spring(s). Flowever, this should not be seen as limiting on the technology, and alternative resilient element(s) may be used within the scope of the technology.
  • each resilient element may have at least one fastener half which is configured to engage e.g. releasably engage, with a corresponding fastener half on the trampoline mat or top rail.
  • the spring(s) may include two fastener halves which engage with a corresponding fastener half on one of the trampoline mat and top rail.
  • the fastener half/halves on the spring may be a hook, loop or other structure.
  • the fastener half on the trampoline mat may be an eyelet or D-ring while the fastener half on the top rail may be an aperture, e.g. a slot.
  • the fastener half / halves may take other forms as should be known to those skilled in the art.
  • the spring(s) may be permanently attached to at least one of the trampoline mat and the top rail.
  • the spring(s) may provide tension to hold the components of the top rail together e.g. the spring(s) and trampoline mat provide a tension force which pulls the top rail segments together and assists in preventing them disengaging from each other in use.
  • the spring(s) may provide substantially all of the force holding the components of the top rail together. This should become clearer from the following description.
  • the top rail segments may releasably connect together to form the top rail. It is though, also envisaged that the top rail segments may not releasably connect together, e.g. they may be designed to be permanently connected together.
  • each top rail segment may have a male end and a female end.
  • the male end may be shaped and / or dimensioned to be inserted into the female end of another top rail segment.
  • the male and female ends may have complementary shapes or profiles or be dimensioned so that the female end can receive the male end.
  • the male end may have a circular cross-section while the female end may have a square cross-section.
  • the male end and female end may have the same cross-sectional shape e.g. square or round, but have different dimensions to facilitate the male end being inserted into the female end.
  • the technology may use a separate connector to facilitate connecting any two top rail segments together to form the top rail.
  • another aspect of the technology relates to a connector for use in forming a top rail of a trampoline, and a trampoline including a connector.
  • each top rail segment may releasably connect with one or more connectors to form the top rail. It is though, also envisaged that the top rail segments may not releasably connect with a connector, e.g. they may be designed to be permanently connected to the connector(s).
  • the connector(s) may include a first end configured to connect to a first top rail segment, and a second end configured to connect to a second top rail segment.
  • the first end and / or second end of the connector can receive an end of the respective top rail segments.
  • the first end of the connector may be configured to receive a first end of a firsttop rail segment
  • the second end of the connector may be configured to receive a second end of a second top rail segment.
  • first end and / or the second end of the connector may be dimensioned to insert into an end of a top rail segment.
  • the connector may have a first end dimensioned to receive an end of a top rail segment and a second end dimensioned to insert into an end of another top rail segment.
  • each of the top rail segments may be substantially identical, however this should not be seen as limiting on the scope of the technology.
  • the ends of the connector may have shapes complementary to the shape of the ends of the top rail segments.
  • the male end of the top rail segment may have a circular cross-section while the female end of the connector may have a square cross-section.
  • the male end and female ends may have the same cross-sectional shape, e.g. square or round, but have different dimensions to facilitate the male end being inserted into the female end.
  • At least one of the first end and the second end of the connector may have a non-circular cross-sectional shape.
  • Use of non-circular cross-sectional shapes may advantageously prevent or resist against rotation of the top rail segments relative to the connector in use.
  • connector and top rail segments may connect to one another using an interference fit, threaded engagement, clamping, or any suitable fastener such as nuts and bolts, screws, rivets and welds.
  • the connector may be constructed or otherwise formed of a durable material such as a metal, i.e. steel.
  • a durable material such as a metal, i.e. steel.
  • the connector may be constructed of a polymer such as glass filled nylon, polypropylene or PPS (polyphenylene sulphide) or alike.
  • the connector may be constructed from substantially square box section of material.
  • the box section may be a steel box section having a wall thickness of between 2 mm and 5 mm, more preferably approximately 2.5 mm.
  • this box section has an external width of between 25 mm and 52 mm, more preferably approximately 40 mm.
  • the connector may have a length of between substantially 130 mm and substantially 170 mm, more preferably between 140 mm and 160 mm, more preferably substantially 150 mm.
  • the recited dimensions for the connector may be dependent on the dimensions of the top rail and / or overall trampoline size, and variances from these will be readily envisaged to those skilled in the art.
  • the connector may include one or more protuberances. These protuberances may be formed by creating an indentation in one or more faces of the connector so as to form a protuberance on an opposing side of said face.
  • the protuberance may be formed by attaching a separate component. For example, a lug or the like may be added using welding or adhering techniques or by using a fastener.
  • the protuberance may be configured to engage with a complementary channel on a top rail segment. This arrangement may facilitate easier assembly of the trampoline, e.g. by ensuring that the connector and top rail are in alignment and are connected in the correct orientation.
  • the top rail segments may be held in engagement with the connectors under tension.
  • these components may be held in engagement using fasteners or any other suitable connection mechanism.
  • the aperture in the top rail is non-circular; for example, the aperture may have a rectangular or oval shaped profile.
  • Use of non-circular apertures may assist in preventing rotation of components such as legs or net poles which may be inserted into the aperture.
  • the aperture(s) may be circular which could be more cost effective to manufacture than non-circular apertures.
  • the aperture is configured to receive an end of a leg, for example the leg may be inserted into the aperture.
  • the connector may instead include one or more components which facilitate connection of the leg to the top rail.
  • the components may include a protrusion, clamp or other suitable fastening arrangement.
  • At least one leg may extend through two apertures in the top rail.
  • the leg may pass through two apertures in the top rail, such that at least a portion of the leg extends above a top surface of the top rail.
  • the top rail has a top or upper surface and a bottom or lower surface and the apertures are provided to the respective surfaces.
  • Positioning a portion of the leg above the top surface of the top rail may facilitate the leg being locked to the top rail, for example by using a locking mechanism such as that described in more detail below.
  • the portion of the leg which extends beyond the top rail is configured to connect to a net pole.
  • an end of the leg may be configured to connect to a net pole, for example by having mating halves, such as male and female ends as described herein. This may advantageously allow the net pole of the trampoline to connect directly to a / the leg, while still being supported.
  • the leg(s) may be configured to support the top rail (and thereby also the trampoline mat) above the ground.
  • the leg(s) can bear down on the ground over which the trampoline is assembled and used. This may facilitate the trampoline being used without the trampoline mat touching the ground in use.
  • the legs may include feet.
  • the feet in use can bear down on the ground to increase the contact surface to the ground and provide additional stability to the trampoline.
  • the feet may connect to two or more legs which are spaced around the perimeter of the top rail.
  • the use of feet which join one or more spaced apart legs may provide additional bracing to the trampoline structure.
  • feet may not be used.
  • the leg(s) may include a bearing surface on which the top rail may bear down in use.
  • This bearing surface may be in the form of a shoulder formed by compression or flaring of a portion of the leg.
  • the bearing surface may be provided by a flange, or any other suitable protrusion.
  • the leg(s) may be angled with respect to a plane defined by the top rail or mat.
  • the leg(s) may be orientated at an angle of between 5 and 15 degrees to that plane. More preferably the leg(s) may be orientated at an angle of approximately 10 degrees to the plane defined by the top rail or mat.
  • the legs may be angled to locate an end of the leg(s) distal to the top rail within the perimeter of the trampoline as defined by the top rail.
  • the leg(s) may be orientated
  • the top rail may have a top or upper surface and a bottom or lower surface.
  • the bottom surface of the rail may face towards the ground when the trampoline is in use, while the top surface of the top rail may face upwardly (away from the ground) when the trampoline is in use.
  • the aperture in the top rail may be at least in the bottom surface of the top rail.
  • the top rail is formed from one or more hollow elongate components
  • these components may be extruded. It may be advantageous for the aperture to be formed directly in the bottom surface of said hollow elongate components. In other words, it may be advantageous for the aperture to be formed directly in the top rail segment(s) and / or connector(s), as opposed to having the aperture provided by a member which is attached to, and extends from, the top rail segment(s) and / or connector(s). By forming the aperture directly in the hollow elongate components, it may be possible to reduce the manufacturing costs of attaching a separate or additional member to the top rail segment(s) and / or connector(s) to facilitate connecting the leg(s) to the top rail.
  • the trampoline may comprise one or more net poles. These net poles may be configured to support a safety net in use.
  • the net pole(s) may include a surface configured to, in use, bear down on a corresponding bearing surface on a leg.
  • the bearing surface on the leg(s) is provided in an outer surface of the leg.
  • the bearing surface may be in the form of a shoulder formed by compression or flaring of the net pole.
  • the interfering member may be provided by a flange, clamp or any other suitable protrusion.
  • the trampoline may include at least one locking mechanism that is configured to secure at least two components together.
  • the locking mechanism may attach at least one top rail segment to a connector.
  • the locking mechanism may connect a net pole and a leg to at least one of each other, the top rail or a connector.
  • the locking mechanism may be configured to secure the net pole both axially and rotationally relative to the leg.
  • the locking mechanism could connect the net pole to other components of the trampoline, such as the leg and foot, or top rail segments.
  • the locking mechanism may preferably be a spring-biased locking member, which is mounted in or to the net pole and / or leg.
  • alternative locking mechanisms such as screw fasteners, pins and clamps may be used.
  • the components of the trampoline may be configured to releasably connect together. This may enable the trampoline to be packed away or transported more easily. Preferably this releasable connection may be achieved without the use of tools such as hammers, spanners or screwdrivers.
  • the components of the trampoline may be dimensioned such that they are able to releasably engage with neighbouring components using a tight slide fit connection.
  • the top rail segments may connect to one another, or to one or more connectors using a male to female connection.
  • a tight slide fit connection may be used on other components of the invention such as the leg(s) and top rail, leg(s) and feet, net poles and legs etc. It should be appreciated that other methods of connection may be used as should be known to those skilled in the art.
  • one or more components of the trampoline may be held together using a locking mechanism as described herein.
  • components of the trampoline may be held together by a friction fit or interference tight slide/wedge fit.
  • tension from the spring(s) may assist to hold together the components once they fully engage each other.
  • the leg(s) may be held in engagement with the top rail using a tight slide/wedge fit, a friction fit, or alternatively due to biasing of these components towards each other due to gravity.
  • a trampoline and components thereof according to the technology may be constructed using methods other than welding.
  • the manufacturing processes used may include extrusion, bending drilling, punching, stamping and coating. By removing welding from the manufacturing processes, the manufacturing cost and / or complexity may be reduced.
  • one or more components of the present technology may include a protective or aesthetic coating, e.g. they may be powder coated.
  • a protective or aesthetic coating e.g. they may be powder coated.
  • alternative coatings may be used such as galvanising, electroplating, passivating, painting, plastic coating, or chemically coated, such as using the AlodineTM process of Henkel Surface Technologies.
  • a method of assembling the trampoline may comprise one or more of the following steps in any order: a) Connecting the plurality /series of top rail segments to form the closed top rail shape;
  • Figure 1A shows a perspective view of a trampoline, without pads or safety net, according to one aspect of the present technology
  • Figure IB shows a close-up detail view of the trampoline mat to top rail connection marked as feature FI in Figure 1A;
  • Figure 1C shows a perspective view of an alternative embodiment of a trampoline, with safety features such as a net and pads;
  • Figure ID shows a perspective view of an exploded sub-section of the trampoline of Figure 1A;
  • Figure 2A shows a perspective view of assembled trampoline components without a trampoline mat, springs, pads or a safety net, according to the present technology
  • Figure 2B shows a side view of a connector being used to join components of a trampoline according to one aspect of the present technology, marked as feature C in Figure 2A;
  • Figure 2C shows an exploded view of the components of Figure 2B
  • Figure 2D shows a partial cross-sectional view of the assembled components of Figures 2B and 2C;
  • Figure 2E shows an exemplary embodiment of how a trampoline mat may be attached to components of a trampoline, using tension springs around the connector, shown in Figure 2B, 2C and 2D;
  • Figure 2F shows a partial cross-sectional view of the components of Figure 2E;
  • Figure 3A shows a perspective view of an embodiment of a connector, according to the present technology;
  • Figure 3B shows an end cross-sectional view of the connector of Figure 3A
  • Figure 3C shows a plan view of the connector of Figure 3A
  • Figure 3D shows a side cross-sectional view of the connector of Figure 3A
  • Figure 4 shows an exploded view of an alternative embodiment of trampoline components, according to the present technology
  • Figure 5A shows an exploded view of a yet further embodiment of trampoline components, according to the present technology
  • Figure 5B shows an assembled view of some of the trampoline components of Figure 5A
  • Figure 5C shows an exemplary trampoline frame construction using the trampoline components of Figures 5A and 5B;
  • Figure 6 shows an exploded view of a yet further embodiment of trampoline components, according to the present technology
  • Figure 7 A shows a partial view of a further exemplary trampoline frame construction according to the present technology
  • Figure 7B shows an exploded view of the components of Figure 7A
  • Figure 7C shows the connector of Figures 7A and 7B
  • Figure 8A shows a further exemplary trampoline frame construction in which the legs of the trampoline are angled inwardly with respect to a plane on which a top rail or mat lies;
  • Figure 8B shows a close-up cross-sectional view of the region marked "C" in Figure 8A;
  • Figure 8C shows a close-up cross-sectional view of the region marked "B" in Figure 8A;
  • Figure 8D shows an elevation view of a top rail segment in accordance with the present technology
  • Figure 9 shows a view of trampoline components according to the prior art
  • Figure 10 shows a further view of trampoline components according to the prior art.
  • Figure 11 shows a connector according to the prior art.
  • FIG. 1A shows a partially assembled trampoline (generally indicated by 100) according to an aspect of the present technology.
  • the trampoline (100) includes a trampoline mat (102) and a support frame indicated generally as (105).
  • the support frame comprises, in general, a top rail (104) and legs (108).
  • the trampoline mat (102) provides a surface for a user to bounce or exercise on.
  • the trampoline mat (102) is constructed of a flexible material so that it can be easily folded and transported.
  • the flexible material may be or include a fabric such as canvas or a polymer such as woven polypropylene. These examples however should not be seen as limiting on the technology and any other suitable material may be used.
  • the flexible material is substantially non-elastic, however this should also not be seen as limiting as it could also have a degree of elasticity.
  • the trampoline mat (102) is attached to the top rail (104) by at least one resilient element, e.g. one or more extension or coil springs, indicated as (106).
  • the springs (106) shown in Figure 1A and IB are positioned around the circumference of the trampoline mat (102) and extend away from the edge of the trampoline mat (102), connecting it to the top rail (104) of the support frame (105).
  • top rail (104) and mat (102) have a circular shape in plan view.
  • the top rail (104) and / or the trampoline mat (102) may have a substantially polygonal shape such as a square, rectangle, hexagon or octagon, or a non-polygonal shape such as an oval.
  • the top rail (104) is supported by the legs (108).
  • the trampoline (100) has 8 legs (108), arranged in opposing pairs.
  • other numbers of legs (108) could be provided e.g. in a larger or smaller diameter trampoline (100).
  • the legs (108) ensure that the trampoline mat (102) is raised above the ground over which it is positioned.
  • the top rail (104) instead may be mounted to a support structure which does not have legs.
  • the trampoline also includes feet (110).
  • the feet (110) each interconnect a pair of radially adjacent legs (108).
  • the feet (110) may provide improved stability to the trampoline (100) by increasing the surface area of the support frame (105) which is in contact with the ground.
  • having feet (110) interconnecting radially adjacent legs (108) may effectively brace and further stabilise the legs (108) and the trampoline (100).
  • feet (110) configurations may be used within the spirit and scope of the technology.
  • the feet (110) may instead link more than two legs, such as three or four legs, or alternatively all of the legs may be linked together.
  • FIG IB shows a close-up view of detail ⁇ ' in Figure 1A and illustrates one way to attach the top rail (104) to the trampoline mat (102) using the springs (106).
  • each spring (106) includes a first fastener half (107A) and a second fastener half (107B).
  • each fastener half (107 A, 107B) is a hook formed by deformation of an end of the spring (106).
  • the first fastener half (107A) can releasably engage a complementary fastener half (104A) on one of the top rail segments (118), e.g. a slot or hole in the top rail segment (118).
  • the trampoline (100) also includes net poles (112).
  • the net poles (112) may be curved as shown in Figure 1A, substantially straight as shown in Figure 1C or be configured with both a curved section and a straight section.
  • the net poles (112) are configured to, in use, support a safety net (114) as is shown in Figure 1C.
  • the safety net (114) is shown in Figure 1C as a transparent component for clarity purposes. Flowever, the safety net (114) is typically a durable see-through fabric or mesh which acts as a barrier to prevent users falling from, or bouncing off, the trampoline (100).
  • the safety net (114) may also be attached to an upper support member (not shown in the Figure) which is connected to and supported by the net poles (112).
  • the upper support member may be a ring-like structure which is supported by upper ends of the net poles (112).
  • the upper support member may include a plurality of straight sections which connect between an upper end of radially adjacent net poles (112).
  • the trampoline (100) includes pads (116) which cover the springs (106). These pads (116) may improve the safety of the trampoline (100) by reducing or otherwise minimising exposure to the springs (106) of the trampoline. For example, it may be advantageous to limit exposure to the springs (106) or falling between the springs (106) to reduce the likelihood that a person's hands or skin is caught in a spring (106) during use.
  • top rail (104) is formed from a plurality of top rail segments (118).
  • Each top rail segment (118) includes a first end (118A) and a second end (118B). These respectively engage with connectors (122).
  • each net pole (112) has a two-part construction having a first net pole segment (120A) and a second net pole segment (120B).
  • the first and second net pole segments (120A, 120B) are designed to releasably connect with one another to provide the net poles (112).
  • This method of construction may also be used with other components of the present technology.
  • the legs (108) and / or feet (110) may also be provided by one or more leg or foot segments.
  • FIGS. 2A to 2F show one approach to connecting top rail segments (118) of a trampoline (200) according to the present technology.
  • a connector (122) connects two of the top rail segments (118) to each other. This forms a portion of the
  • each connector (122) can connect at least one of a leg (108) and a net pole (112) to the top rail (104).
  • the connector (122) may not be used.
  • at least one of the net poles (112) and the legs (108) may connect separately of each other to the top rail segments (118).
  • the connector (122) includes at least one aperture (220) configured to receive a leg (108) of the trampoline (200).
  • the aperture (220) is preferably formed in a lower surface of the connector (220) which, when the trampoline (100) is assembled, completely or partially faces towards the ground on which the trampoline (100) is assembled.
  • the connector (122) of Figures 2A to 2F also includes an upper aperture (221) on an upper surface. This allows the leg (108) to at least partially pass through both apertures (220, 221). This arrangement however should not be seen as limiting, for example in embodiments which do not include net poles (112), or where the net poles (112) are instead attached to a side of the leg (108), the connector (122) may not include upper aperture (221).
  • the aperture(s) (220, 221) are substantially circular. It should be appreciated that it may be advantageous for the aperture(s) to have a complementary shape to the leg (108) and/or net pole (112) to ensure a tight fit. It should also be appreciated that in alternative embodiments the apertures (220, 221) may be non-circular, e.g. oval or rectangle such as a square. Providing non-circular aperture(s) may limit or prevent the leg (108) and / or net pole (112) from rotating relative to the connector (122).
  • the leg (108) includes a bearing surface (222) in the form of a shoulder.
  • the connector (122) bears down upon the bearing surface (222) to limit the distance that the leg (108) can travel through the aperture(s) (220, 221) in the connector (122).
  • the bearing surface (222) is constructed by reducing of a portion of the leg (108) at or towards an end of the leg (108). Flowever, this should not be seen as limiting on the technology, and alternative methods of providing a bearing surface (222) as should be known to those skilled in the art are envisaged.
  • suitable methods include attaching a flange or other suitable protruding member to the leg (108), removably attaching a fastener to the leg (108), a clamping mechanism which attaches to the leg (108), or flaring a portion of the leg (108).
  • the bearing surface (222) is preferably provided on an outer surface of the leg (108). This may advantageously allow the end of the leg (108) to pass through the aperture(s) (220, 221).
  • the ends (118A, 118B) of the top rail segments (118) end include a relatively short region (223) which enables the ends (118A, 118B) to be inserted into the connector (122).
  • connection of the top rail segments (118) with the connector (122) may be achieved using any of the methods described above in relation to the connection of the leg (108) with the connector (122).
  • top surfaces of the ends of the top rail segments (118) include at least one recessed channel (224) which can receive a corresponding protuberance (226) provided to an interior surface on the connector (122).
  • the protuberance (226) and channels (224) co-operate to assist with alignment of the top rail segments (118) with the connector (122) or to prevent rotation of the components relative to each other, and limit the internal travel of top rail segment 118 into 122.
  • the embodiment includes an aperture (221) in the upper (227) surface and an aperture (220) in the lower surface (229) respectively of the connector (122).
  • the apertures (220, 221) allow for insertion of the leg (108) and net pole (112) (as described in more detail below).
  • the protuberance (226) is formed as an indentation in the upper surface (227) of the connector (122).
  • alternatives embodiment may include a protuberance (226) which is formed by any other process known to those skilled in the art.
  • the protuberance (226) may be a separate component which is attached to the connector by way of welding, fastening, adhesives or otherwise engaging with an aperture in the connector (122).
  • channel (224) is illustrated as an indentation in the top rail segments (118) as per the embodiment of Figure 2C, alternatives configurations for the channel, such as slots, may be used without departing from the scope of the technology.
  • a channel may instead be provided in the connector (122) and a protuberance can be provided on the top rail segment(s) (118).
  • an end (108A) of the leg (108) is inserted through the apertures (220, 221) in the connector (122).
  • An end (112A) of the net pole (112) is then inserted into the end (108A) of the leg (108).
  • the net pole (112) is preferably held at the appropriate position within the leg (108) by way of a bearing surface (228), e.g. a shoulder, formed in the net pole (112).
  • bearing surface (228) of the net pole (112) may be formed using any of the methods described in relation to the bearing surface (222) of the leg (108).
  • a locking mechanism may be used to secure the leg (108) and net pole (112) to each other.
  • the locking mechanism is provided by a locking member (230) which can be optionally biased by a spring (233).
  • a spring biased locking mechanism is that it may allow the trampoline to be assembled without the use of tools.
  • the locking mechanism may be a fastener such as a nut and bolt, a clamp or a pin.
  • the locking member (230) can take any form such as an elongate member, or a relatively small, complete or partial sphere shape to provide a detent.
  • the locking member (230) is configured to engage with a locking aperture (231B) in the net pole (112) and a locking aperture (231A) in the leg (108).
  • the locking mechanism may limit or prevent upwards movement of the connector (122) on the leg (108) and net pole (112). It should be appreciated that the above example should not be seen as limiting on the technology, and in alternative embodiments of the technology, the net pole (112) may be connected to the leg (108) without the use of a locking mechanism.
  • the net poles (112) may be able to rotate relative to the leg. This can be undesirable, particularly where curved net poles (112) are used, as the curvature of the net poles (112) relative to the trampoline (100) could not be controlled.
  • One technique for preventing this rotation is to use non-circular leg ends (108A) and net pole ends (112A).
  • FIG. 2D shows a partial cross-section of the net pole (112), leg (108), connector (122) and the locking mechanism.
  • the locking mechanism is mounted inside the net pole (112). This process may be done during manufacture of the individual components such that the assembly process for the customer is as simple as possible.
  • leg (108) illustrates an embodiment wherein the end (112A) of net pole (112) is positioned within the leg (108) in use. It should however be appreciated that this arrangement should not be seen as limiting on the technology.
  • the end (108A) of leg (108) may be inserted into the end (112A) of net pole (112) and secured in place by a corresponding locking mechanism.
  • the leg (108) and net pole (112) may otherwise connect with each other for example by using corresponding protuberances and channels which interlock with one another.
  • Figures 2E and 2F illustrate exemplary embodiments of how the springs (106) can be positioned relative to the connector (122).
  • the springs (106) can be close to the ends of the connector (122), which can provide a number of advantages. For instance, this may assist in providing a substantially equal tension around the perimeter of the top rail (104). In addition, it may assist to pull the top rail segments (118) into engagement with the connector (122).
  • the springs (106) may be configured to engage with the connector (122) and / or the top rail segments (118). Engaging the springs (106) with both the top rail segments (118) and connector (122) may further ensure that the top rail segments (118) are unable to disengage from the connector (122) until the springs (106) are removed.
  • the connector (122) may be constructed of a durable material such as a metal, however this should not be seen as limiting on the technology and polymers may also be used.
  • the connector (122) is constructed of a steel extrusion such as a box-section. This box-section preferably measures substantially 150mm long +/- 20mm and has an external width of substantially 40mm +/- 2mm with a 2.5mm +/- 0.5mm wall thickness. Flowever, these dimensions are provided by way of example only and should not be seen as limiting on the technology.
  • one or more of the trampoline components may be provided with a protective coating and / or cosmetic coating to improve the appearance and / or corrosion resistance.
  • the protective and / or cosmetic coatings may include one or more of galvanising, electroplating, passivation, painting, powder coating, plastic coating, or chemical coating such as a chromate conversion coating, as occurs in the AlodineTM process of Flenkel Surface Technologies.
  • one embodiment of the technology may use a connector as described herein which attaches the top rail (104) to the legs (108) of the trampoline (100).
  • This embodiment may still include one or more welded connections, for example to attach the net poles (112) of the trampoline directly to the legs (108) or the top rail (104).
  • the various components and segments of the trampoline may be secured together using any suitable methods known to those skilled in the art.
  • one or more of the components may be secured using: fasteners such as nuts, bolts and rivets, threaded connections, interference or friction fits, or locking pins or spring biased locking mechanisms.
  • FIG. 4 shows an exploded view of an alternative embodiment of the present technology.
  • the leg (108) of the trampoline is configured to be inserted through the apertures (220, 221) of the connector (122).
  • a straight net pole (112) may engage with the end (108A) of the leg (108) as described in relation to the previous embodiments.
  • a locking mechanism is not required to secure the straight net pole (112) to the leg (108) and/or prevent the leg (108) from coming loose from the connector (122).
  • Use of a gradual taper may advantageously increase the engagement force between the net pole (112) and leg (108) or leg (108) and connector (122) due to the aforementioned friction or interference fit.
  • Providing a trampoline (100, 200) and components thereof that are able to be assembled without locking may have a number of advantages, including:
  • FIGS 5A and 5B are exploded and assembled views of section "C" shown in Figure 2C.ln these Figures, like references refer to like components previously described.
  • the leg (108) is configured to connect directly to the top rail segments (518). This construction may advantageously reduce the total manufacturing costs, reduce weight and shipping costs, and provide a simpler method of manufacture.
  • the top rail segments (518) include a male tapered end portion (502) which in use is inserted into an aperture (not fully illustrated) in an end (518A) of a female open-ended portion of the adjacent top rail segment (518).
  • This method of connection should not be seen as limiting on the invention, and alternative methods of connection may be used without departing from the spirit and scope of the technology.
  • the top rail segments (518) may instead connect using a threaded engagement, friction or interference fit, clamp or any other fastener arrangement known in the art.
  • top rail segments (518) may be held together using any of the methods described in relation to the previous embodiments.
  • the top rail segments (518) may be held together using the tension of the springs (106) together with the trampoline mat (102).
  • leg (108) In use, the end (108A) of leg (108) is inserted through an aperture (520, 521) in a lower and upper surface of the top rail segment (518). The end (108A) may also extend through an aperture (521) in an upper surface of the top rail segment (518).
  • An optional net pole (112) may then be inserted into the end (108A) and optionally secured in place, along with the leg (108) using a locking mechanism (230) that engages with apertures 231A and 231B.
  • the leg (108) may simply be secured relative to the top rail segment (518) using the locking mechanism (230) and spring (233).
  • FIG. 6 shows a yet further embodiment of the technology, wherein the components of the trampoline as assembled without the use of a locking mechanism (230) or connector (122). Removal of the locking mechanism may be achieved using any of the methods described in relation to Figure 4, while a connector (122) may not be required due to use of the approaches described in relation to Figures 5A to 5C.
  • trampoline and components thereof which can be assembled without the use of locking mechanism or connectors (122).
  • removal of locking mechanisms and connectors may advantageously reduce the manufacturing cost of the trampoline and/or provide trampoline components which are easier to assemble.
  • the net pole (112) is constructed of at least two net pole segments (120A, 120B) respectively.
  • Use of two or more net pole segments (120A, 120B) to form the net pole (112) may advantageously allow for a compact packaging. Flowever, this should not be seen as limiting on the technology.
  • FIGS 9 to 11 illustrate prior art methods of attaching a net pole (1090) to a leg (1092) of a trampoline.
  • a net pole connector (1094) is welded to a side of the leg (1092) in order to receive the net pole (1090).
  • a bracing bracket (1096) has also been welded between the net pole connector (1094) and the leg (1092) in order to provide the necessary support to the welded connection in use.
  • leg of Figure 9 is bulkier to ship and more awkward to handle, which may complicate the assembly process.
  • welding is a relatively expensive process which requires expertise to be performed correctly, and as previously mentioned, welding complicates the manufacturing order as any protective coatings must be applied post-weld.
  • Figure 10 provides an alternative method of attaching a net pole (1190) to a leg (1192) using a series of spacers (1196) and fasteners (1198).
  • This approach has a number of disadvantages over the present technology including that the:
  • a common feature of the prior art leg arrangements and components in Figures 9 and 10 is that a connector (1095) is formed with a top portion (1290) which is welded to a lower portion (1292), as best seen in Figure 11.
  • the top portion (1290) is configured to connect two top rail segments together, while the lower portion (1292) receives a leg (1092, 1192).
  • the requirement to weld the top portion (1290) and the lower portion (1292) to each other has a number of disadvantages compared to the present technology, including that the prior art connector (1095):
  • FIGs 7A to 7C show an alternative arrangement to connect at least one of the net poles (112) and the legs (108) to the top rail (104).
  • the net poles (112) and legs (108) are secured to the connector (122). This arrangement may prevent rotation of the legs (108) and / or the net poles (112).
  • This construction may be particularly beneficial in embodiments where the legs (108) of the trampoline (100) are not linked together by feet (110), in which case they may be able to rotate e.g. relative to one another and / or the top rail (104).
  • Preventing rotation of the net poles (112) relative to the top rail (104) can simplify the overall construction of the trampoline (100) and the respective components. For instance, if the net poles (112) could rotate relative to the top rail (104) would make it more difficult to attach a net to the net poles (114) or hinder the net poles (114) holding the net in a desired position. Other arrangements to prevent net pole (114) rotation include a separate ring-like structure.
  • Figure 7A illustrates one method of preventing rotation of the net poles (112).
  • the locking member (230) is positioned and orientated to align with and extend into an aperture (702) in the connector (122). In this way the locking member (230) links the net poles (112), legs (108) and connector (122) together to substantially prevent rotation relative to one another.
  • Figure 7B provides an exploded view of the embodiment of Figure 7A.
  • the locking member (230) is attached to the interior of the net pole (112).
  • an end (108A) of the leg (108) is inserted through the apertures (220, 221) in the connector (122).
  • the end (112A) of the net pole (112) is then inserted into an aperture (unnumbered) in the end (108A) of the leg (108).
  • the locking member (230) at least partially inserted into the locking aperture (231A) in the leg (108) and the aperture (702) in the connector (122).
  • top rail segments (118) are each configured to engage with the connector (122) by slidably inserting the respective ends (118A, 118B) into the ends of the connector (as described elsewhere herein).
  • Figure 7C provides a close-up view of the connector (122). From this view it can be seen that the aperture (702) is shown as an elongated slot. This shape may advantageously assist with alignment of the locking member (230) relative to the aperture (702). This however should not be seen as limiting on the scope of the technology, and in other examples of the technology, the aperture (702) may be substantially circular or any other suitable shape such as rectangular.
  • Figure 8A shows a further example of the present technology in which the leg (108) is orientated at an angle relative to the horizontal plane of the mat.
  • the end (108B) of the leg (180) distal to the top rail (104) is located within the perimeter of the trampoline as defined by the top rail (104).
  • Figure 8B shows a close-up of section "C" shown in Figure 8A.
  • the connector (122) is configured so that a lower surface (229) in which the aperture (220) is located is inclined with respect to a horizontal axis or plane, e.g. a plane defined by the top rail (104) or the trampoline mat.
  • connector (122) has a square cross section, and so the entire connector (122) is "twisted” to orientate the bottom surface (229) at an angle relative to the horizontal axis or plane.
  • the connector (112) may have a non-square cross section, e.g. a parallelogram or trapezoidal cross section allowing the lower surface (229) to be inclined to the horizontal.
  • the angle (802) is preferably between 5 and 15 degrees from vertical, or more preferably approximately 10 degrees from vertical.
  • the angle may be defined relative to a substantially horizontal plane on which the top rail (104) lies in use.
  • the angle (802) may be approximately 10 degrees from the horizontal plane of the top rail (104).
  • Figure 8C shows a close-up cross-sectional view of section "B" shown in Figure 8A.
  • the net pole segments (120A, 120B) may be connected using a locking mechanism as described herein.
  • Other methods of attaching net pole segments (120A, 120B) may be used without departing from the scope of the technology, such as fasteners or an interference fit.
  • Figure 8D shows one example of a top rail segment (118) in which ends (118A, 118B) are shaped to correspond to the angle (802) as described herein. This may be achieved by manufacturing techniques such as crimping, or alternatively securing end caps to the top rail segment(s) (118) e.g. by welding, to provide the desired orientation for the ends (118A, 118B).
  • connector-less design of Figures 5A to 5C and Figure 6 may also be modified such that the net pole (1090, 1190) is attached to the leg (1092, 1192) of the trampoline using any of the arrangements and components shown in Figures 9 or 10.
  • the assembly of the components described herein may involve one of more of the following steps in any order: a) Connecting the top rail segments (118) to form the top rail (104); b) Inserting at least one leg (108) into a corresponding aperture (220) in the top rail (104) or a connector (122) in the top rail (104); c) Engaging a locking mechanism so that a locking member (230) at least partially inserts into an aperture, to prevent removal of the leg(s) (108) from the top rail segment (118); d) Attaching feet (110) to one or more of the legs (108); e) Attaching a net pole (112) to at least one of the legs (108) and the top rail (104); f) Attaching a safety net (114) to one or more of the net poles (112); g) Attaching padding (116) to the trampoline; and h) Attaching the springs (106) to the support frame (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.

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Abstract

The present invention relates to trampolines, components thereof, and methods of manufacture and assembly. The invention has particular application to a connector used to connect adjacent members of the top rail of the trampoline, the connector also configured to receive at least one leg of the trampoline and an optional net pole, all without the use of fasteners and / or tools.

Description

TRAMPOLINES, COMPONENTS THEREOF AND METHODS OF MANUFACTURE AND ASSEMBLY
Field of the Invention
The present invention relates to trampolines, components thereof, and methods of manufacture and assembly. Background to the Invention
Trampolines are regularly used for various reasons including exercise, gymnastics, rehabilitation and entertainment. They can range in size from around 1 metre across to sizes exceeding 4 metres across.
Because of their large size, trampolines are commonly shipped in a disassembled state to reduce shipping costs. The dissembled trampoline comprises multiple components which are then assembled together by the purchaser.
It is desirable to be able to provide trampoline components which are simple and cost effective to manufacture while also allowing for easy assembly by the purchaser into a useable trampoline. However, stock inventory of these components is an important consideration.
In general terms, a trampoline has a trampoline mat which is suspended from a support frame by resilient components. The support frame includes some form of structure (henceforth "a top rail") that surrounds the trampoline mat and legs which support the top rail above the ground. The top rail structure is commonly a circular or rectangular shape which is made of two or more segments which are connected together. In use, a person can stand or jump on the trampoline mat to deform the resilient components suspending the trampoline mat. These resilient components provide a restorative force which opposes their deformation and assists the person to jump higher than they would otherwise be able.
There are two common types of trampolines. A standard, or sprung, trampoline uses a plurality of coiled metal springs as the resilient components. Alternatively, a "spring-free" trampoline uses bendable rods, made from a composite material such as fibreglass, as the resilient elements. Either way, the resilient components suspend the mat and provide the elastic and resilient force needed to promote jumping.
Trampolines can be dangerous and there are several ways that people can be injured when using them. Therefore, it is known to provide safety nets to provide a barrier that stops people inadvertently falling off or being bounced or otherwise rebounded from the trampoline. These safety nets are commonly supported by net poles. The net poles attach to the support frame, either directly to the legs or to the
1 top-rail. Common methods of connection include welding and complex fastener arrangements which are tricky to assemble.
The trampoline components must be assembled together to provide the finished and complete trampoline. There are various proprietary systems to assemble these components in the market and generally each manufacturer has its own such system. However, these systems each have issues which make them a less than optimal solution for a manufacturer and / or customer.
For example, many proprietary systems include components, typically parts of the support frame and / or net poles, which are welded together. Welding has a number of disadvantages such as being a relatively expensive process and prone to failure if done incorrectly. It can also introduce a weak point at which the frame could corrode or otherwise become structurally compromised. Additionally, any protective coatings, such as painting or a powder coating, must be applied after the welding process. That places restrictions on the order in which components can be manufactured. Furthermore, components manufactured using welding can also be difficult to package or ship due to their geometry.
Other known solutions are less desirable for the end user. For example, where components need to be joined using fasteners such as nuts and bolts, the purchaser must have the necessary tools, or the manufacturer must provide these with the trampoline further increasing cost.
There are also potential safety concerns with relying on the purchaser or end user to correctly assemble the trampoline. For example, failure to tighten a fastener sufficiently or to include important components such as washers can lead to the trampoline being damaged or the fasteners inadvertently coming loose. Additionally, overtightening fasteners can cause failure such as stripping of a thread or damaging the components which are being joined. Thus, the structural integrity of the trampoline may be compromised.
Object of the Invention
It is an object of the present technology to provide an improved trampoline, components thereof and, a method of manufacture or assembly of same.
Alternatively, it is an object of the present technology to provide a trampoline or components thereof which are more durable and/or reliable, or a method of manufacture or assembly for a trampoline, which improves durability and/or reliability.
Alternatively, it is an object of the present technology to provide a trampoline or components thereof which are cost-effective, or a method of manufacture or assembly for a trampoline which is more cost- effective.
2 Alternatively, it is an object of the present technology to provide a trampoline or components thereof which facilitates assembly with fewer, or entirely without, tools, or a method of manufacture or assembly which allows for same.
Alternatively, it is an object of the present technology to provide a trampoline, components thereof or a method of manufacturing same with less or no welding, and/or a method of assembling same without welding.
Alternatively, it is an object of the present technology to provide a trampoline, components thereof, or a method of manufacture or assembly of a trampoline which is easier to assemble.
Alternatively, it is an object of the present technology to provide a trampoline, components thereof, a method of manufacture or assembly of a trampoline which provides improved safety for users.
Alternatively, it is an object of the present technology to provide trampoline components which can be used across a range of trampoline sizes, thereby reducing the number of part variations required to keep in stock.
Alternatively, it is an object of the present technology to at least provide the public with a useful choice.
Summary of the Invention
According to a first aspect of the technology, there is provided a trampoline.
According to a further aspect of the technology, there is provided a kit set of components that can be assembled together to form a trampoline.
According to a further aspect of the technology, there is provided a connector for joining two or more components of a trampoline to each other.
According to a further aspect of the technology, there is provided a trampoline and components thereof which are able to be manufactured with less or no welding.
According to a further aspect of the technology, there is provided a trampoline and components thereof which are able to be manufactured with less or tools.
According to a further aspect of the technology, there is provided a trampoline and components thereof which are able to be manufactured with less or no fasteners such as bolts or screws.
According to a further aspect of the technology, there is provided a trampoline, wherein the trampoline includes: a plurality or series of top rail segments, and
3 at least one leg, wherein the plurality of top rail segments are connected to each other to form a top rail, and further wherein the top rail has at least one aperture, and an end of the at least one leg extends into the at least one aperture in the top rail.
According to a further aspect of the technology, there is provided a kit set of parts that can be assembled together to form a trampoline, wherein the kit set includes: a plurality or series of top rail segments which can be connected to each other to in use form a top rail, and at least one leg, wherein the top rail includes at least one aperture, and in use an end of the at least one leg can extend into the aperture in the top rail.
Preferably, the method includes providing a plurality of legs.
Preferably, the plurality of legs are configured to be used with the top rail segments and the top rail segments.
Preferably, the method includes providing at least one connector which is configured to connect an end of one of the top segments to an end of another one of the top rail segments.
Preferably, the connector(s) is configured to also connect an end of one of the top rail segments to an end of another one of the top rail segments.
Preferably, the method includes providing instructions to assemble the components of the kitset.
Preferably, the instructions are provided as a list of written steps, or a video accessible by via an internet connection.
Preferably, the one or more components may be a/the component/s as described herein, e.g. a net, a trampoline mat, resilient elements, net poles, ladder etc.
According to another aspect of the technology, there is provided a trampoline which comprises: a plurality of top rail segments that are connected to each other to form a top rail which defines a plane, a plurality of legs which in use support the top rail above the ground, wherein each of the plurality of legs has a respective first end that is connected to the top rail and a respective second end which is located distal to, and below, the plane,
4 and further wherein at least one of the plurality of legs is orientated at an internal angle of less than 90 degrees to the plane.
Preferably, the trampoline may comprise a trampoline mat. This trampoline mat may be constructed of a planar sheet of durable material. For example, the trampoline mat may comprise a fabric such as canvas or alternatively a polymer such as polypropylene. It may be advantageous for the trampoline mat to comprise a mesh such as a woven mesh, as the mesh construction may increase the durability of the trampoline mat and / or better allow moisture to drain from the surface.
It should be understood that when the trampoline is assembled, the trampoline mat is suspended from the top rail.
Preferably, at least one of the top rail and trampoline mat may be substantially circular. Even more preferably, the top rail which has a shape that is substantially complementary to the shape of the trampoline mat. For example, the top rail may have a ring-like form and the trampoline mat may be circular.
In alternative embodiments, at least one of the top rail and trampoline mat may have a polygonal shape, i.e. the top rail and / or trampoline mat may be substantially square, rectangular, hexagonal or octagonal, or include a non-polygonal shape such as an oval, or a complex shape having any other suitable combination of polygonal and non-polygonal features.
It should be understood that reference herein to the trampoline and components thereof should be understood to encompass a kitset of parts containing same.
Preferably, the trampoline may include at least one resilient element. The resilient element may be at least one spring element in the form of an extension or tension spring(s). Flowever, this should not be seen as limiting on the technology. For example, the resilient element(s) may be torsion springs or flexible rods as should be known to those skilled in the art. In alternative embodiments of the technology, at least one resilient element may be the trampoline mat. For example, the trampoline mat may be constructed of a resiliently deformable material such as an elastomer.
The resilient element(s) of the present technology shall be referred to as spring(s). Flowever, this should not be seen as limiting on the technology, and alternative resilient element(s) may be used within the scope of the technology.
Preferably, the spring(s) releasably attach to at least one of the trampoline mat and the top rail of the trampoline. For instance, each resilient element may have at least one fastener half which is configured to engage e.g. releasably engage, with a corresponding fastener half on the trampoline mat or top rail.
5 In the preferred embodiment, the spring(s) may include two fastener halves which engage with a corresponding fastener half on one of the trampoline mat and top rail.
For instance, the fastener half/halves on the spring may be a hook, loop or other structure. The fastener half on the trampoline mat may be an eyelet or D-ring while the fastener half on the top rail may be an aperture, e.g. a slot. However, it should be understood that the fastener half / halves may take other forms as should be known to those skilled in the art.
However, it is also envisaged that the spring(s) may be permanently attached to at least one of the trampoline mat and the top rail.
Preferably, the spring(s) may provide tension to hold the components of the top rail together e.g. the spring(s) and trampoline mat provide a tension force which pulls the top rail segments together and assists in preventing them disengaging from each other in use.
In a particularly preferred embodiment, the spring(s) may provide substantially all of the force holding the components of the top rail together. This should become clearer from the following description.
In preferred embodiments, the top rail segments may releasably connect together to form the top rail. It is though, also envisaged that the top rail segments may not releasably connect together, e.g. they may be designed to be permanently connected together.
In one embodiment, each top rail segment may have a male end and a female end. In these configurations, the male end may be shaped and / or dimensioned to be inserted into the female end of another top rail segment.
The male and female ends may have complementary shapes or profiles or be dimensioned so that the female end can receive the male end. For instance, the male end may have a circular cross-section while the female end may have a square cross-section. Alternatively, the male end and female end may have the same cross-sectional shape e.g. square or round, but have different dimensions to facilitate the male end being inserted into the female end.
However, it is also envisaged that the technology may use a separate connector to facilitate connecting any two top rail segments together to form the top rail. Accordingly, another aspect of the technology relates to a connector for use in forming a top rail of a trampoline, and a trampoline including a connector.
6 Preferably, each top rail segment may releasably connect with one or more connectors to form the top rail. It is though, also envisaged that the top rail segments may not releasably connect with a connector, e.g. they may be designed to be permanently connected to the connector(s).
In one embodiment, the connector(s) may include a first end configured to connect to a first top rail segment, and a second end configured to connect to a second top rail segment. Preferably the first end and / or second end of the connector can receive an end of the respective top rail segments. For example, the first end of the connector may be configured to receive a first end of a firsttop rail segment, and the second end of the connector may be configured to receive a second end of a second top rail segment.
However, in alternative embodiments the first end and / or the second end of the connector may be dimensioned to insert into an end of a top rail segment.
In a yet further alternative embodiment, the connector may have a first end dimensioned to receive an end of a top rail segment and a second end dimensioned to insert into an end of another top rail segment. Preferably each of the top rail segments may be substantially identical, however this should not be seen as limiting on the scope of the technology.
The ends of the connector may have shapes complementary to the shape of the ends of the top rail segments. For instance, the male end of the top rail segment may have a circular cross-section while the female end of the connector may have a square cross-section. Alternatively, the male end and female ends may have the same cross-sectional shape, e.g. square or round, but have different dimensions to facilitate the male end being inserted into the female end.
In preferred embodiments, at least one of the first end and the second end of the connector may have a non-circular cross-sectional shape. Use of non-circular cross-sectional shapes may advantageously prevent or resist against rotation of the top rail segments relative to the connector in use.
The use of male and female ends should not be seen as limiting on the technology. For instance, in alternative embodiments the connector and top rail segments may connect to one another using an interference fit, threaded engagement, clamping, or any suitable fastener such as nuts and bolts, screws, rivets and welds.
Preferably, the connector may be constructed or otherwise formed of a durable material such as a metal, i.e. steel. However, this should not be seen as limiting on the technology and in some embodiments the connector may be constructed of a polymer such as glass filled nylon, polypropylene or PPS (polyphenylene sulphide) or alike.
7 Preferably, the connector may be constructed from substantially square box section of material. For example, the box section may be a steel box section having a wall thickness of between 2 mm and 5 mm, more preferably approximately 2.5 mm. Preferably this box section has an external width of between 25 mm and 52 mm, more preferably approximately 40 mm.
Preferably, the connector may have a length of between substantially 130 mm and substantially 170 mm, more preferably between 140 mm and 160 mm, more preferably substantially 150 mm.
It should be understood that the recited dimensions for the connector may be dependent on the dimensions of the top rail and / or overall trampoline size, and variances from these will be readily envisaged to those skilled in the art.
Preferably, the connector may include one or more protuberances. These protuberances may be formed by creating an indentation in one or more faces of the connector so as to form a protuberance on an opposing side of said face. However, in alternative embodiments, the protuberance may be formed by attaching a separate component. For example, a lug or the like may be added using welding or adhering techniques or by using a fastener.
Preferably, the protuberance may be configured to engage with a complementary channel on a top rail segment. This arrangement may facilitate easier assembly of the trampoline, e.g. by ensuring that the connector and top rail are in alignment and are connected in the correct orientation.
Preferably, the top rail segments may be held in engagement with the connectors under tension. For example, by using the tension provided by the trampoline mat and / or spring(s). However, in alternative embodiments, these components may be held in engagement using fasteners or any other suitable connection mechanism.
Preferably, the aperture in the top rail is non-circular; for example, the aperture may have a rectangular or oval shaped profile. Use of non-circular apertures may assist in preventing rotation of components such as legs or net poles which may be inserted into the aperture. In alternative embodiments the aperture(s) may be circular which could be more cost effective to manufacture than non-circular apertures.
Preferably, the aperture is configured to receive an end of a leg, for example the leg may be inserted into the aperture. In alternative embodiments, the connector may instead include one or more components which facilitate connection of the leg to the top rail. For example, the components may include a protrusion, clamp or other suitable fastening arrangement.
8 In some embodiments at least one leg may extend through two apertures in the top rail. For example, the leg may pass through two apertures in the top rail, such that at least a portion of the leg extends above a top surface of the top rail. Preferably in these embodiments, the top rail has a top or upper surface and a bottom or lower surface and the apertures are provided to the respective surfaces.
Positioning a portion of the leg above the top surface of the top rail may facilitate the leg being locked to the top rail, for example by using a locking mechanism such as that described in more detail below.
Preferably, the portion of the leg which extends beyond the top rail is configured to connect to a net pole. For example, an end of the leg may be configured to connect to a net pole, for example by having mating halves, such as male and female ends as described herein. This may advantageously allow the net pole of the trampoline to connect directly to a / the leg, while still being supported.
Preferably, the leg(s) may be configured to support the top rail (and thereby also the trampoline mat) above the ground. The leg(s) can bear down on the ground over which the trampoline is assembled and used. This may facilitate the trampoline being used without the trampoline mat touching the ground in use.
Preferably, the legs may include feet. The feet in use can bear down on the ground to increase the contact surface to the ground and provide additional stability to the trampoline.
In addition, the feet may connect to two or more legs which are spaced around the perimeter of the top rail. The use of feet which join one or more spaced apart legs may provide additional bracing to the trampoline structure.
Flowever, in alternative embodiments, feet may not be used.
Preferably, the leg(s) may include a bearing surface on which the top rail may bear down in use. This bearing surface may be in the form of a shoulder formed by compression or flaring of a portion of the leg. In alternative embodiments, the bearing surface may be provided by a flange, or any other suitable protrusion.
Preferably, the leg(s) may be angled with respect to a plane defined by the top rail or mat. For example, the leg(s) may be orientated at an angle of between 5 and 15 degrees to that plane. More preferably the leg(s) may be orientated at an angle of approximately 10 degrees to the plane defined by the top rail or mat.
Preferably, the legs may be angled to locate an end of the leg(s) distal to the top rail within the perimeter of the trampoline as defined by the top rail. In alternative embodiments, the leg(s) may be orientated
9 substantially vertically so that the distal end of the leg(s) are located substantially below and inline with the perimeter of the trampoline.
Preferably the top rail may have a top or upper surface and a bottom or lower surface. Preferably the bottom surface of the rail may face towards the ground when the trampoline is in use, while the top surface of the top rail may face upwardly (away from the ground) when the trampoline is in use.
Preferably the aperture in the top rail may be at least in the bottom surface of the top rail.
It may further be advantageous for the aperture in the bottom surface of the top rail to bear upon the bearing surface of the leg in use.
In embodiments where the top rail is formed from one or more hollow elongate components, these components may be extruded. It may be advantageous for the aperture to be formed directly in the bottom surface of said hollow elongate components. In other words, it may be advantageous for the aperture to be formed directly in the top rail segment(s) and / or connector(s), as opposed to having the aperture provided by a member which is attached to, and extends from, the top rail segment(s) and / or connector(s). By forming the aperture directly in the hollow elongate components, it may be possible to reduce the manufacturing costs of attaching a separate or additional member to the top rail segment(s) and / or connector(s) to facilitate connecting the leg(s) to the top rail.
Preferably, the trampoline may comprise one or more net poles. These net poles may be configured to support a safety net in use.
Preferably, the net pole(s) may include a surface configured to, in use, bear down on a corresponding bearing surface on a leg. Preferably the bearing surface on the leg(s) is provided in an outer surface of the leg. For example, the bearing surface may be in the form of a shoulder formed by compression or flaring of the net pole. In alternative embodiments, the interfering member may be provided by a flange, clamp or any other suitable protrusion.
Preferably, the trampoline may include at least one locking mechanism that is configured to secure at least two components together.
In one embodiment, the locking mechanism may attach at least one top rail segment to a connector.
Alternatively, or in addition, the locking mechanism may connect a net pole and a leg to at least one of each other, the top rail or a connector.
In some embodiments, the locking mechanism may be configured to secure the net pole both axially and rotationally relative to the leg.
10 Alternatively, the locking mechanism could connect the net pole to other components of the trampoline, such as the leg and foot, or top rail segments.
In a particularly preferred embodiment, the locking mechanism may preferably be a spring-biased locking member, which is mounted in or to the net pole and / or leg. However, alternative locking mechanisms, such as screw fasteners, pins and clamps may be used.
Preferably, the components of the trampoline may be configured to releasably connect together. This may enable the trampoline to be packed away or transported more easily. Preferably this releasable connection may be achieved without the use of tools such as hammers, spanners or screwdrivers. For example, the components of the trampoline may be dimensioned such that they are able to releasably engage with neighbouring components using a tight slide fit connection. For example, the top rail segments may connect to one another, or to one or more connectors using a male to female connection. Similarly, a tight slide fit connection may be used on other components of the invention such as the leg(s) and top rail, leg(s) and feet, net poles and legs etc. It should be appreciated that other methods of connection may be used as should be known to those skilled in the art.
In some embodiments, one or more components of the trampoline may be held together using a locking mechanism as described herein. In alternative embodiments, components of the trampoline may be held together by a friction fit or interference tight slide/wedge fit. In addition, tension from the spring(s) may assist to hold together the components once they fully engage each other. For example, the leg(s) may be held in engagement with the top rail using a tight slide/wedge fit, a friction fit, or alternatively due to biasing of these components towards each other due to gravity.
Preferably, a trampoline and components thereof according to the technology, may be constructed using methods other than welding. For example, the manufacturing processes used may include extrusion, bending drilling, punching, stamping and coating. By removing welding from the manufacturing processes, the manufacturing cost and / or complexity may be reduced.
Preferably, one or more components of the present technology may include a protective or aesthetic coating, e.g. they may be powder coated. However alternative coatings may be used such as galvanising, electroplating, passivating, painting, plastic coating, or chemically coated, such as using the Alodine™ process of Henkel Surface Technologies.
Preferably a method of assembling the trampoline may comprise one or more of the following steps in any order: a) Connecting the plurality /series of top rail segments to form the closed top rail shape;
11 b) Inserting at least one leg into a corresponding aperture in the top rail; c) Engaging a locking mechanism to prevent removal of the leg(s) from the top rail; d) Attaching feet to one or more of the legs; e) Attaching a net pole to at least one of the legs and the top rail; f) Attaching a safety net to one or more of the net poles; g) Attaching padding to the trampoline; h) Attaching a ladder to the top rail of the trampoline; i) Attaching the springs and the mat.
Advantages of the present technology should be apparent from the present disclosure, although these may include a trampoline and components thereof which are:
• easier to assemble - for example, by providing a trampoline which has fewer components, less complex components or components which lend themselves to a simpler assembly process;
• sturdier - for example, by providing components which are able to engage with each other more tightly;
• more reliable - for example, by removing the potential of failure due to welded components or over/under tightened fasteners;
• more cost-effective to manufacture - for example, by removing welding processes, and allowing the protective coating to be applied at any part of the process;
• more cost-effective to ship - for example, by providing components which have less complex geometry; and / or
• more aesthetically pleasing - for example, by removing unsightly welds and fasteners.
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.
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 1A shows a perspective view of a trampoline, without pads or safety net, according to one aspect of the present technology;
Figure IB shows a close-up detail view of the trampoline mat to top rail connection marked as feature FI in Figure 1A;
12 Figure 1C shows a perspective view of an alternative embodiment of a trampoline, with safety features such as a net and pads;
Figure ID shows a perspective view of an exploded sub-section of the trampoline of Figure 1A;
Figure 2A shows a perspective view of assembled trampoline components without a trampoline mat, springs, pads or a safety net, according to the present technology;
Figure 2B shows a side view of a connector being used to join components of a trampoline according to one aspect of the present technology, marked as feature C in Figure 2A;
Figure 2C shows an exploded view of the components of Figure 2B; Figure 2D shows a partial cross-sectional view of the assembled components of Figures 2B and 2C;
Figure 2E shows an exemplary embodiment of how a trampoline mat may be attached to components of a trampoline, using tension springs around the connector, shown in Figure 2B, 2C and 2D;
Figure 2F shows a partial cross-sectional view of the components of Figure 2E; Figure 3A shows a perspective view of an embodiment of a connector, according to the present technology;
Figure 3B shows an end cross-sectional view of the connector of Figure 3A; Figure 3C shows a plan view of the connector of Figure 3A; and Figure 3D shows a side cross-sectional view of the connector of Figure 3A; Figure 4 shows an exploded view of an alternative embodiment of trampoline components, according to the present technology;
Figure 5A shows an exploded view of a yet further embodiment of trampoline components, according to the present technology;
Figure 5B shows an assembled view of some of the trampoline components of Figure 5A; Figure 5C shows an exemplary trampoline frame construction using the trampoline components of Figures 5A and 5B;
Figure 6 shows an exploded view of a yet further embodiment of trampoline components, according to the present technology;
13 Figure 7 A shows a partial view of a further exemplary trampoline frame construction according to the present technology;
Figure 7B shows an exploded view of the components of Figure 7A;
Figure 7C shows the connector of Figures 7A and 7B; Figure 8A shows a further exemplary trampoline frame construction in which the legs of the trampoline are angled inwardly with respect to a plane on which a top rail or mat lies;
Figure 8B shows a close-up cross-sectional view of the region marked "C" in Figure 8A;
Figure 8C shows a close-up cross-sectional view of the region marked "B" in Figure 8A;
Figure 8D shows an elevation view of a top rail segment in accordance with the present technology;
Figure 9 shows a view of trampoline components according to the prior art;
Figure 10 shows a further view of trampoline components according to the prior art; and
Figure 11 shows a connector according to the prior art.
Detailed Description of Preferred Embodiment(s) Referring first to Figure 1A which shows a partially assembled trampoline (generally indicated by 100) according to an aspect of the present technology.
As shown, the trampoline (100) includes a trampoline mat (102) and a support frame indicated generally as (105). The support frame comprises, in general, a top rail (104) and legs (108). The trampoline mat (102) provides a surface for a user to bounce or exercise on. The trampoline mat (102) is constructed of a flexible material so that it can be easily folded and transported. The flexible material may be or include a fabric such as canvas or a polymer such as woven polypropylene. These examples however should not be seen as limiting on the technology and any other suitable material may be used. In the preferred embodiment the flexible material is substantially non-elastic, however this should also not be seen as limiting as it could also have a degree of elasticity. The trampoline mat (102) is attached to the top rail (104) by at least one resilient element, e.g. one or more extension or coil springs, indicated as (106). The springs (106) shown in Figure 1A and IB are positioned around the circumference of the trampoline mat (102) and extend away from the edge of the trampoline mat (102), connecting it to the top rail (104) of the support frame (105).
14 Alternative resilient elements may also be used; for example torsion springs may be used or resiliently flexible rods as should be known by one skilled in the art. Attachment of the mat (102) to the support frame (105) will be discussed in more detail below.
It can be seen in Figure 1 that the top rail (104) and mat (102) have a circular shape in plan view. However, this should not be seen as limiting on the technology and other shapes for the top rail (104) and trampoline mats (102) may be used. For example, the top rail (104) and / or the trampoline mat (102) may have a substantially polygonal shape such as a square, rectangle, hexagon or octagon, or a non-polygonal shape such as an oval.
The top rail (104) is supported by the legs (108). In the embodiment of Figure 1A, the trampoline (100) has 8 legs (108), arranged in opposing pairs. However, it is also possible that other numbers of legs (108) could be provided e.g. in a larger or smaller diameter trampoline (100).
The legs (108) ensure that the trampoline mat (102) is raised above the ground over which it is positioned. However, this should not be seen as limiting on the technology, and in some configurations, such as in-ground trampolines, the top rail (104) instead may be mounted to a support structure which does not have legs.
In the embodiment of Figure 1A, the trampoline also includes feet (110). In the illustrated embodiment, the feet (110) each interconnect a pair of radially adjacent legs (108). The feet (110) may provide improved stability to the trampoline (100) by increasing the surface area of the support frame (105) which is in contact with the ground. In addition, having feet (110) interconnecting radially adjacent legs (108) may effectively brace and further stabilise the legs (108) and the trampoline (100).
It should be appreciated that alternative feet (110) configurations may be used within the spirit and scope of the technology. For example, instead of linking adjacent pairs of legs (108) together, the feet (110) may instead link more than two legs, such as three or four legs, or alternatively all of the legs may be linked together.
Figure IB shows a close-up view of detail Ή' in Figure 1A and illustrates one way to attach the top rail (104) to the trampoline mat (102) using the springs (106). In this embodiment, each spring (106) includes a first fastener half (107A) and a second fastener half (107B). In the illustrated embodiment, each fastener half (107 A, 107B) is a hook formed by deformation of an end of the spring (106).
The first fastener half (107A) can releasably engage a complementary fastener half (104A) on one of the top rail segments (118), e.g. a slot or hole in the top rail segment (118). The second fastener half (107B)
15 can releasably engage a complementary fastener half provided on the trampoline mat (102), e.g. a D- ring (not shown in the Figures).
In some embodiments of the technology, the trampoline (100) also includes net poles (112). The net poles (112) may be curved as shown in Figure 1A, substantially straight as shown in Figure 1C or be configured with both a curved section and a straight section. The net poles (112) are configured to, in use, support a safety net (114) as is shown in Figure 1C.
The safety net (114) is shown in Figure 1C as a transparent component for clarity purposes. Flowever, the safety net (114) is typically a durable see-through fabric or mesh which acts as a barrier to prevent users falling from, or bouncing off, the trampoline (100).
The safety net (114) may also be attached to an upper support member (not shown in the Figure) which is connected to and supported by the net poles (112). For example, the upper support member may be a ring-like structure which is supported by upper ends of the net poles (112). In an alternative embodiment the upper support member may include a plurality of straight sections which connect between an upper end of radially adjacent net poles (112).
Also shown in Figure 1C, the trampoline (100) includes pads (116) which cover the springs (106). These pads (116) may improve the safety of the trampoline (100) by reducing or otherwise minimising exposure to the springs (106) of the trampoline. For example, it may be advantageous to limit exposure to the springs (106) or falling between the springs (106) to reduce the likelihood that a person's hands or skin is caught in a spring (106) during use.
Referring now to Figure ID showing an exploded view of a section of the trampoline (100) according to the embodiment of Figure 1A. In this embodiment the top rail (104) is formed from a plurality of top rail segments (118). Each top rail segment (118) includes a first end (118A) and a second end (118B). These respectively engage with connectors (122).
Figure ID also shows that each net pole (112) has a two-part construction having a first net pole segment (120A) and a second net pole segment (120B). The first and second net pole segments (120A, 120B) are designed to releasably connect with one another to provide the net poles (112). This method of construction may also be used with other components of the present technology. For example, the legs (108) and / or feet (110) may also be provided by one or more leg or foot segments.
Referring now to Figures 2A to 2F which show one approach to connecting top rail segments (118) of a trampoline (200) according to the present technology. In the embodiment of Figures 2A to 2F a connector (122) connects two of the top rail segments (118) to each other. This forms a portion of the
16 top rail (104), and once all top rail top rail segments (118) are connected together the entire top rail (104) is formed.
In addition, each connector (122) can connect at least one of a leg (108) and a net pole (112) to the top rail (104).
In some embodiments of the technology not shown here, the connector (122) may not be used. In these embodiments at least one of the net poles (112) and the legs (108) may connect separately of each other to the top rail segments (118).
The connector (122) includes at least one aperture (220) configured to receive a leg (108) of the trampoline (200). The aperture (220) is preferably formed in a lower surface of the connector (220) which, when the trampoline (100) is assembled, completely or partially faces towards the ground on which the trampoline (100) is assembled.
The connector (122) of Figures 2A to 2F also includes an upper aperture (221) on an upper surface. This allows the leg (108) to at least partially pass through both apertures (220, 221). This arrangement however should not be seen as limiting, for example in embodiments which do not include net poles (112), or where the net poles (112) are instead attached to a side of the leg (108), the connector (122) may not include upper aperture (221).
In the embodiment of Figures 2A to 2F, the aperture(s) (220, 221) are substantially circular. It should be appreciated that it may be advantageous for the aperture(s) to have a complementary shape to the leg (108) and/or net pole (112) to ensure a tight fit. It should also be appreciated that in alternative embodiments the apertures (220, 221) may be non-circular, e.g. oval or rectangle such as a square. Providing non-circular aperture(s) may limit or prevent the leg (108) and / or net pole (112) from rotating relative to the connector (122).
As best seen in Figures 2B and 2C, the leg (108) includes a bearing surface (222) in the form of a shoulder. In use, the connector (122) bears down upon the bearing surface (222) to limit the distance that the leg (108) can travel through the aperture(s) (220, 221) in the connector (122). In the embodiment shown, the bearing surface (222) is constructed by reducing of a portion of the leg (108) at or towards an end of the leg (108). Flowever, this should not be seen as limiting on the technology, and alternative methods of providing a bearing surface (222) as should be known to those skilled in the art are envisaged. For example, suitable methods include attaching a flange or other suitable protruding member to the leg (108), removably attaching a fastener to the leg (108), a clamping mechanism which attaches to the leg (108), or flaring a portion of the leg (108).
17 The bearing surface (222) is preferably provided on an outer surface of the leg (108). This may advantageously allow the end of the leg (108) to pass through the aperture(s) (220, 221).
As shown in Figure 2C the ends (118A, 118B) of the top rail segments (118) end include a relatively short region (223) which enables the ends (118A, 118B) to be inserted into the connector (122). However, it should be appreciated that alternative methods of connecting the top rail segments (118) to the connector (122) may be achieved within the spirit and scope of the present technology. For example, connection of the top rail segments (118) with the connector (122) may be achieved using any of the methods described above in relation to the connection of the leg (108) with the connector (122).
In addition, as shown in Figure 2C the top surfaces of the ends of the top rail segments (118) include at least one recessed channel (224) which can receive a corresponding protuberance (226) provided to an interior surface on the connector (122). The protuberance (226) and channels (224) co-operate to assist with alignment of the top rail segments (118) with the connector (122) or to prevent rotation of the components relative to each other, and limit the internal travel of top rail segment 118 into 122.
Referring now to Figures 3A to 3D which illustrate additional features of the connector (122). It can be seen that the embodiment includes an aperture (221) in the upper (227) surface and an aperture (220) in the lower surface (229) respectively of the connector (122). The apertures (220, 221) allow for insertion of the leg (108) and net pole (112) (as described in more detail below).
In one embodiment, the protuberance (226) is formed as an indentation in the upper surface (227) of the connector (122). However, alternatives embodiment may include a protuberance (226) which is formed by any other process known to those skilled in the art. For example, the protuberance (226) may be a separate component which is attached to the connector by way of welding, fastening, adhesives or otherwise engaging with an aperture in the connector (122).
Similarly, while the channel (224) is illustrated as an indentation in the top rail segments (118) as per the embodiment of Figure 2C, alternatives configurations for the channel, such as slots, may be used without departing from the scope of the technology. In a yet further alternative, a channel may instead be provided in the connector (122) and a protuberance can be provided on the top rail segment(s) (118).
In use, for example as shown in Figure 2C, an end (108A) of the leg (108) is inserted through the apertures (220, 221) in the connector (122). An end (112A) of the net pole (112) is then inserted into the end (108A) of the leg (108). The net pole (112) is preferably held at the appropriate position within the leg (108) by way of a bearing surface (228), e.g. a shoulder, formed in the net pole (112). It should be
18 appreciated that the bearing surface (228) of the net pole (112) may be formed using any of the methods described in relation to the bearing surface (222) of the leg (108).
A locking mechanism may be used to secure the leg (108) and net pole (112) to each other. In the illustrated embodiment of Figures 2D and 5A the locking mechanism is provided by a locking member (230) which can be optionally biased by a spring (233). One advantage of using a spring biased locking mechanism is that it may allow the trampoline to be assembled without the use of tools. However, this should not be seen as limiting and any suitable locking mechanism (230) may be used. For example, the locking mechanism may be a fastener such as a nut and bolt, a clamp or a pin.
The locking member (230) can take any form such as an elongate member, or a relatively small, complete or partial sphere shape to provide a detent.
As best seen in Figure 2C, the locking member (230) is configured to engage with a locking aperture (231B) in the net pole (112) and a locking aperture (231A) in the leg (108). The locking mechanism may limit or prevent upwards movement of the connector (122) on the leg (108) and net pole (112). It should be appreciated that the above example should not be seen as limiting on the technology, and in alternative embodiments of the technology, the net pole (112) may be connected to the leg (108) without the use of a locking mechanism.
It should be appreciated that in embodiments where locking mechanisms are not used, the net poles (112) may be able to rotate relative to the leg. This can be undesirable, particularly where curved net poles (112) are used, as the curvature of the net poles (112) relative to the trampoline (100) could not be controlled. One technique for preventing this rotation is to use non-circular leg ends (108A) and net pole ends (112A).
Referring now back to Figure 2D, which shows a partial cross-section of the net pole (112), leg (108), connector (122) and the locking mechanism. In this view it can be seen that the locking mechanism is mounted inside the net pole (112). This process may be done during manufacture of the individual components such that the assembly process for the customer is as simple as possible.
The above examples illustrate an embodiment wherein the end (112A) of net pole (112) is positioned within the leg (108) in use. It should however be appreciated that this arrangement should not be seen as limiting on the technology. For example, in an alternative embodiment, the end (108A) of leg (108) may be inserted into the end (112A) of net pole (112) and secured in place by a corresponding locking mechanism. Alternatively, the leg (108) and net pole (112) may otherwise connect with each other for example by using corresponding protuberances and channels which interlock with one another.
19 Figures 2E and 2F illustrate exemplary embodiments of how the springs (106) can be positioned relative to the connector (122). The springs (106) can be close to the ends of the connector (122), which can provide a number of advantages. For instance, this may assist in providing a substantially equal tension around the perimeter of the top rail (104). In addition, it may assist to pull the top rail segments (118) into engagement with the connector (122). It should be appreciated that in alternative embodiments of the technology, the springs (106) may be configured to engage with the connector (122) and / or the top rail segments (118). Engaging the springs (106) with both the top rail segments (118) and connector (122) may further ensure that the top rail segments (118) are unable to disengage from the connector (122) until the springs (106) are removed.
It may be advantageous for the connector (122) to be constructed of a durable material such as a metal, however this should not be seen as limiting on the technology and polymers may also be used. In the preferred embodiment the connector (122) is constructed of a steel extrusion such as a box-section. This box-section preferably measures substantially 150mm long +/- 20mm and has an external width of substantially 40mm +/- 2mm with a 2.5mm +/- 0.5mm wall thickness. Flowever, these dimensions are provided by way of example only and should not be seen as limiting on the technology.
In the preferred embodiment of the technology, one or more of the trampoline components may be provided with a protective coating and / or cosmetic coating to improve the appearance and / or corrosion resistance. For example, the protective and / or cosmetic coatings may include one or more of galvanising, electroplating, passivation, painting, powder coating, plastic coating, or chemical coating such as a chromate conversion coating, as occurs in the Alodine™ process of Flenkel Surface Technologies.
It should be appreciated that in some embodiments it may be advantageous to combine the technology described herein in certain regions of a trampoline while using other attachment mechanisms such as welding in other regions. For example, one embodiment of the technology may use a connector as described herein which attaches the top rail (104) to the legs (108) of the trampoline (100). This embodiment may still include one or more welded connections, for example to attach the net poles (112) of the trampoline directly to the legs (108) or the top rail (104).
Furthermore, while the present technology provides examples of how the various components and segments of the trampoline may be secured together using any suitable methods known to those skilled in the art. For example, one or more of the components may be secured using: fasteners such as nuts, bolts and rivets, threaded connections, interference or friction fits, or locking pins or spring biased locking mechanisms.
20 Referring now to Figure 4 which shows an exploded view of an alternative embodiment of the present technology. In this embodiment the leg (108) of the trampoline is configured to be inserted through the apertures (220, 221) of the connector (122). Optionally a straight net pole (112) may engage with the end (108A) of the leg (108) as described in relation to the previous embodiments. However, in this embodiment it is envisaged that a locking mechanism is not required to secure the straight net pole (112) to the leg (108) and/or prevent the leg (108) from coming loose from the connector (122).
For example, it may be sufficient to rely on a friction or interference fit between the connector (122) and leg (108) or between the leg (108) and straight net pole (112). This friction or interference fit, together with gravity and/or spring tension, secures the respective components of the trampoline together.
It may also be advantageous to provide the net pole (112) and or leg (108) with a gradual taper. Use of a gradual taper may advantageously increase the engagement force between the net pole (112) and leg (108) or leg (108) and connector (122) due to the aforementioned friction or interference fit.
Providing a trampoline (100, 200) and components thereof that are able to be assembled without locking may have a number of advantages, including:
• A lower manufacture cost for the components; and
• A faster, simpler assembly for the customer.
Referring now to Figures 5A to 5C which show yet a further alternative embodiment of the technology which does not require the separate connector (122) of the previous embodiments described.
Figures 5A and 5B are exploded and assembled views of section "C" shown in Figure 2C.ln these Figures, like references refer to like components previously described. In this embodiment, it can be seen that the leg (108) is configured to connect directly to the top rail segments (518). This construction may advantageously reduce the total manufacturing costs, reduce weight and shipping costs, and provide a simpler method of manufacture.
In this embodiment the top rail segments (518) include a male tapered end portion (502) which in use is inserted into an aperture (not fully illustrated) in an end (518A) of a female open-ended portion of the adjacent top rail segment (518). This method of connection however should not be seen as limiting on the invention, and alternative methods of connection may be used without departing from the spirit and scope of the technology. For example, the top rail segments (518) may instead connect using a threaded engagement, friction or interference fit, clamp or any other fastener arrangement known in the art.
21 It should be understood that the top rail segments (518) may be held together using any of the methods described in relation to the previous embodiments. For example, the top rail segments (518) may be held together using the tension of the springs (106) together with the trampoline mat (102).
In use, the end (108A) of leg (108) is inserted through an aperture (520, 521) in a lower and upper surface of the top rail segment (518). The end (108A) may also extend through an aperture (521) in an upper surface of the top rail segment (518). An optional net pole (112) may then be inserted into the end (108A) and optionally secured in place, along with the leg (108) using a locking mechanism (230) that engages with apertures 231A and 231B. Alternatively, where a net pole (112) is not used the leg (108) may simply be secured relative to the top rail segment (518) using the locking mechanism (230) and spring (233).
Referring now to Figure 6 which shows a yet further embodiment of the technology, wherein the components of the trampoline as assembled without the use of a locking mechanism (230) or connector (122). Removal of the locking mechanism may be achieved using any of the methods described in relation to Figure 4, while a connector (122) may not be required due to use of the approaches described in relation to Figures 5A to 5C.
It may be advantageous to provide a trampoline and components thereof which can be assembled without the use of locking mechanism or connectors (122). For example, removal of locking mechanisms and connectors may advantageously reduce the manufacturing cost of the trampoline and/or provide trampoline components which are easier to assemble.
In the example illustrated in Figures ID and 2A, the net pole (112) is constructed of at least two net pole segments (120A, 120B) respectively. Use of two or more net pole segments (120A, 120B) to form the net pole (112) may advantageously allow for a compact packaging. Flowever, this should not be seen as limiting on the technology.
Figures 9 to 11 illustrate prior art methods of attaching a net pole (1090) to a leg (1092) of a trampoline. In the embodiment of Figure 9 a net pole connector (1094) is welded to a side of the leg (1092) in order to receive the net pole (1090). It can also be seen that a bracing bracket (1096) has also been welded between the net pole connector (1094) and the leg (1092) in order to provide the necessary support to the welded connection in use.
The result is that the prior art legs are complex and costly to manufacture. In contrast, the present technology reduces costs of manufacture and simplifies manufacturing requirements by solving problems in the prior art.
22 Additionally, the leg of Figure 9 is bulkier to ship and more awkward to handle, which may complicate the assembly process. Furthermore, welding is a relatively expensive process which requires expertise to be performed correctly, and as previously mentioned, welding complicates the manufacturing order as any protective coatings must be applied post-weld.
Figure 10 provides an alternative method of attaching a net pole (1190) to a leg (1192) using a series of spacers (1196) and fasteners (1198). This approach has a number of disadvantages over the present technology including that the:
• Trampoline is more complex and time consuming to assemble;
• Fasteners introduce a potential failure point in the trampoline, as they may work loose during operation;
• Fasteners and spacers introduce additional cost to the trampoline; and
• That the fasteners may become damaged during installation if overtightened.
A common feature of the prior art leg arrangements and components in Figures 9 and 10 is that a connector (1095) is formed with a top portion (1290) which is welded to a lower portion (1292), as best seen in Figure 11.
The top portion (1290) is configured to connect two top rail segments together, while the lower portion (1292) receives a leg (1092, 1192). Flowever, the requirement to weld the top portion (1290) and the lower portion (1292) to each other has a number of disadvantages compared to the present technology, including that the prior art connector (1095):
• Is more expensive to manufacture;
• Is bulkier than that present technology;
• Does not accommodate a net pole (1090, 1190); and
• Must be welded prior to applying a protective coating.
Alternate net pole and lea connections
Referring now to Figures 7A to 7C, in which like references refer to like components previously described, these show an alternative arrangement to connect at least one of the net poles (112) and the legs (108) to the top rail (104). In the embodiment of Figs 7 A to 7C, the net poles (112) and legs (108) are secured to the connector (122). This arrangement may prevent rotation of the legs (108) and / or the net poles (112). This construction may be particularly beneficial in embodiments where the legs (108) of the trampoline (100) are not linked together by feet (110), in which case they may be able to rotate e.g. relative to one another and / or the top rail (104).
23 Preventing rotation of the net poles (112) relative to the top rail (104) can simplify the overall construction of the trampoline (100) and the respective components. For instance, if the net poles (112) could rotate relative to the top rail (104) would make it more difficult to attach a net to the net poles (114) or hinder the net poles (114) holding the net in a desired position. Other arrangements to prevent net pole (114) rotation include a separate ring-like structure.
Figure 7A illustrates one method of preventing rotation of the net poles (112). As shown, the locking member (230) is positioned and orientated to align with and extend into an aperture (702) in the connector (122). In this way the locking member (230) links the net poles (112), legs (108) and connector (122) together to substantially prevent rotation relative to one another.
Figure 7B provides an exploded view of the embodiment of Figure 7A. In this view it can be seen that the locking member (230) is attached to the interior of the net pole (112). In use, an end (108A) of the leg (108) is inserted through the apertures (220, 221) in the connector (122). The end (112A) of the net pole (112) is then inserted into an aperture (unnumbered) in the end (108A) of the leg (108). The locking member (230) at least partially inserted into the locking aperture (231A) in the leg (108) and the aperture (702) in the connector (122).
The top rail segments (118) are each configured to engage with the connector (122) by slidably inserting the respective ends (118A, 118B) into the ends of the connector (as described elsewhere herein).
Figure 7C provides a close-up view of the connector (122). From this view it can be seen that the aperture (702) is shown as an elongated slot. This shape may advantageously assist with alignment of the locking member (230) relative to the aperture (702). This however should not be seen as limiting on the scope of the technology, and in other examples of the technology, the aperture (702) may be substantially circular or any other suitable shape such as rectangular.
Orientation of legs to top rail
Figure 8A shows a further example of the present technology in which the leg (108) is orientated at an angle relative to the horizontal plane of the mat. As a result, the end (108B) of the leg (180) distal to the top rail (104) is located within the perimeter of the trampoline as defined by the top rail (104). This approach may provide a number of advantages, including one or more of the following:
• improving the stability of the trampoline (100) compared to trampolines (100) that have vertically orientated legs;
• facilitating construction of trampolines (100) of different diameter while improving foot space and clearance around the trampoline;
24 • improving the aesthetics of the trampoline (100).
Figure 8B shows a close-up of section "C" shown in Figure 8A. As shown, the connector (122) is configured so that a lower surface (229) in which the aperture (220) is located is inclined with respect to a horizontal axis or plane, e.g. a plane defined by the top rail (104) or the trampoline mat.
In the illustrated embodiment, connector (122) has a square cross section, and so the entire connector (122) is "twisted" to orientate the bottom surface (229) at an angle relative to the horizontal axis or plane. Flowever, it is also envisaged that the connector (112) may have a non-square cross section, e.g. a parallelogram or trapezoidal cross section allowing the lower surface (229) to be inclined to the horizontal.
The angle (802) is preferably between 5 and 15 degrees from vertical, or more preferably approximately 10 degrees from vertical.
Alternatively, the angle may be defined relative to a substantially horizontal plane on which the top rail (104) lies in use. For example, the angle (802) may be approximately 10 degrees from the horizontal plane of the top rail (104).
Figure 8C shows a close-up cross-sectional view of section "B" shown in Figure 8A. As shown, the net pole segments (120A, 120B) may be connected using a locking mechanism as described herein. Other methods of attaching net pole segments (120A, 120B) may be used without departing from the scope of the technology, such as fasteners or an interference fit.
Figure 8D shows one example of a top rail segment (118) in which ends (118A, 118B) are shaped to correspond to the angle (802) as described herein. This may be achieved by manufacturing techniques such as crimping, or alternatively securing end caps to the top rail segment(s) (118) e.g. by welding, to provide the desired orientation for the ends (118A, 118B).
Trampoline construction
It should however be appreciated that features of the technology described above may be used in combination with the features of the prior art shown in Figures 10 to 12. For example, in the embodiments of Figures 2A to 2F or Figure 4, the net poles (112) may instead be attached using the prior art arrangement shown in Figures 9 or 10 e.g. to the legs (1092, 1192).
In yet further embodiments, the connector-less design of Figures 5A to 5C and Figure 6, may also be modified such that the net pole (1090, 1190) is attached to the leg (1092, 1192) of the trampoline using any of the arrangements and components shown in Figures 9 or 10.
25 It should become apparent from the foregoing discussion that the present technology may provide one or more improved method of assembly. For example, the assembly of the components described herein may involve one of more of the following steps in any order: a) Connecting the top rail segments (118) to form the top rail (104); b) Inserting at least one leg (108) into a corresponding aperture (220) in the top rail (104) or a connector (122) in the top rail (104); c) Engaging a locking mechanism so that a locking member (230) at least partially inserts into an aperture, to prevent removal of the leg(s) (108) from the top rail segment (118); d) Attaching feet (110) to one or more of the legs (108); e) Attaching a net pole (112) to at least one of the legs (108) and the top rail (104); f) Attaching a safety net (114) to one or more of the net poles (112); g) Attaching padding (116) to the trampoline; and h) Attaching the springs (106) to the support frame (104) and the mat (102) to the springs (102); i) Attaching accessories such as a ladder.
It should be appreciated that variations to the assembly order may be made without departing from the spirit and scope of the technology.
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".
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.
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.
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
26 made without departing from the spirit and scope of the invention as defined in the appended claims herein and without diminishing its attendant advantages. It is therefore intended that such changes and modifications be included within the scope of the present claims.
27

Claims

Claims
1. A trampoline, wherein the trampoline comprises: a plurality of top rail segments that are connected together to form a top rail, a plurality of legs, and a plurality of net poles; wherein the top rail comprises a plurality of top surface apertures and a plurality of bottom surface apertures, and wherein each top surface aperture is aligned with a respective bottom surface aperture to define a connection passage, and wherein at least one leg is coupled to a respective net pole to form a leg and net pole unit, and further wherein at least one of the leg and net pole forming the leg and net pole unit is inserted into the connection passage.
2. The trampoline according to claim 1 further comprising at least one connector, wherein the connector(s) is / are configured to connect to a first end of one of the top rail segments and to a first end of another one of the top rail segments to secure the top rail segments together.
3. The trampoline according to claim 2, wherein the connector(s) comprise a first end which has a first opening and a second end which has a second opening, and wherein the first opening is configured to receive a first end of one of the top rail segments and the second opening is configured to receive the first end of another of the top rail segments.
4. The trampoline according to claim 3, wherein at least one of the ends of the connector(s) have shapes complementary to the shape of the ends of the top rail segments.
5. The trampoline according to either claim 3 or 4, wherein at least one of the ends of the connector(s) has a non-circular cross-sectional shape.
6. The trampoline according to any one of claims 2 to 5, wherein the connector(s) comprises one or more protuberances configured to engage with one or more complementary channels formed on at least one top rail segment.
7. The trampoline according to any one of claims 2 to 6, wherein the top surface aperture(s) and the bottom surface aperture(s) are each provided in a respective one of the connectors.
8. The trampoline according to any one of claims 1 to 7, wherein at least one of the leg and the net pole which forms a leg and net pole unit extends through the connection passage such that at least one of a portion of the leg extends above a top surface of the top rail and a portion of the net pole extends below a bottom surface of the top rail.
28 The trampoline according to any one of claims 1 to 8, wherein at least one of the legs comprises a bearing surface on which the top rail bears down in use. The trampoline according to any one of claims 1 to 9, wherein at least one of the legs is angled with respect to a plane defined by the top rail to locate an end of the leg(s) distal to the top rail within a perimeter of the trampoline as defined by the top rail. The trampoline according to any one of claims 1 to 10 further comprising at least one locking mechanism configured to facilitate attachment of one of the top rail segments to another top rail segment. The trampoline according to any one of claims 1 to 11 further comprising at least one locking mechanism configured to facilitate attachment of the leg and the net pole to each other. The trampoline according to any one of claims 1 to 12 further comprising at least one locking mechanism configured to facilitate attachment of the leg and net pole unit to at least one of the top rail and a/the respective connector. The trampoline according to any one of claims 11 to 13, wherein the locking mechanism is a spring biased locking member mounted in or to at least one of the net pole and the leg forming the leg and net pole unit. The trampoline according to any one of claims 1 to 14 further comprising a trampoline mat. The trampoline according to any one of claims 1 to 15 further comprising at least one resilient element configured to connect a/the trampoline mat to the top rail. A kit set of parts that can be assembled together to form a trampoline, wherein the kit set comprises: a plurality top rail segments which can be connected to each other to in use form a top rail, a plurality of legs, and a plurality of net poles; wherein the top rail comprises a plurality of top surface apertures and a plurality of bottom surface apertures, and wherein each top surface aperture is aligned with a respective bottom surface aperture to define a connection passage. A method of assembling a trampoline, wherein the method comprises one or more of the following steps in any order:
(a) Connecting a plurality of top rail segments to form a top rail, wherein the top rail comprises a plurality of top surface apertures and a plurality of bottom surface apertures, and wherein
29 each top surface aperture is aligned with a respective bottom surface aperture to define a connection passage;
(b) Coupling at least one leg to a respective net pole to form a leg and net pole unit;
(c) Inserting at least one of the leg and the net pole forming the leg and net pole unit into the connection passage. The method according to claim 18 further comprising the step of engaging a locking mechanism to facilitate attachment of the leg and the net pole to each other. The method according to either claim 18 or 19 further comprising the step of engaging a locking mechanism to facilitate attachment of the leg and net pole unit to the top rail. A trampoline, wherein the trampoline comprises: a plurality of top rail segments, and at least one leg, wherein the plurality of top rail segments are connected to each other to form a top rail, and further wherein the top rail has a bottom surface and at least one aperture provided to the bottom surface, and an end of the at least one leg extends into the at least one aperture. A kit set of parts that can be assembled together to form a trampoline, wherein the kit set comprises: a plurality of top rail segments which can be connected to each other to in use form a top rail, and at least one leg, wherein the top rail has a bottom surface and at least one aperture provided to the bottom surface, and in use an end of the at least one leg can extend into the at least one aperture. A trampoline, wherein the trampoline comprises: a plurality of top rail segments that are connected to each other to form a top rail which defines a plane, a plurality of legs which in use support the top rail above the ground, wherein each of the plurality of legs has a respective first end that is connected to the top rail and a respective second end which is located distal to, and below, the plane, and further wherein at least one of the plurality of legs is orientated at an internal angle of less than 90 degrees to the plane. A connector for use in forming a top rail of a trampoline, wherein the connector includes a bottom surface and at least one aperture provided to the bottom surface, and in use an end of a leg of the trampoline can extend into the aperture in the connector.
30
PCT/NZ2022/050054 2021-05-10 2022-05-10 Trampolines, components thereof and methods of manufacture and assembly WO2022240299A1 (en)

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NZ77554821 2021-05-10

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070111860A1 (en) * 1997-06-20 2007-05-17 Jumpsport, Inc. Enclosure system
US20120289379A1 (en) * 2011-05-13 2012-11-15 Stokes Steven G Apparatus, system, and method for a trampoline
US20160296781A1 (en) * 2013-11-19 2016-10-13 Vuly Property Pty Ltd Trampolines
US10265562B2 (en) * 2016-05-16 2019-04-23 Plum Products Holdings Pty Ltd Safety enclosure for trampoline users
US20200282285A1 (en) * 2019-03-06 2020-09-10 Skywalker Holdings, Llc Trampoline with handrail

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070111860A1 (en) * 1997-06-20 2007-05-17 Jumpsport, Inc. Enclosure system
US20120289379A1 (en) * 2011-05-13 2012-11-15 Stokes Steven G Apparatus, system, and method for a trampoline
US20160296781A1 (en) * 2013-11-19 2016-10-13 Vuly Property Pty Ltd Trampolines
US10265562B2 (en) * 2016-05-16 2019-04-23 Plum Products Holdings Pty Ltd Safety enclosure for trampoline users
US20200282285A1 (en) * 2019-03-06 2020-09-10 Skywalker Holdings, Llc Trampoline with handrail

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