BACKGROUND

[0001] Zip lines are known in the art as a trolley or carriage running along a suspended cable allowing a rider to move from one end to the other. However, there are several known problems with these structures. The first includes the deceleration of the rider as they approach the end as well as the initial force to move the user - for example, a push from another person, or a push off from a portion of the structure. Further, the riding structures of the prior art require significant upper body strength and the ability of a user to grip and hold on with their hands, thus limiting many users from enjoying the structure.

[0002] Another series of problems arise from the cable used in a zip line. The cable requires a gradient in order to allow a user to continue propulsion from one end to another. This often limits spaces where a zip line can be installed to those with a natural gradient, or requires the creation of an artificial gradient. There is also a limitation to the maximum length of a zip line before structural soundness is compromised. Additionally, the connection between the riding structure and the cable presents some safety hazards, including the potential for the fingers of users to get caught on or around the cable.

[0003] A solution to these problems is required that provides the fun experience of a zip line without all of the hazards and limitations of the conventional design.

[0004] The discussion above is merely provided for general background information and is not intended to be used as an aid in determining the scope of the claimed subject matter.

SUMMARY

[0005] Zip track systems and extension systems are provided. An extension mechanism for a zip track system illustratively comprises a crossover unit, configured to attach to a zip track. The crossover unit illustratively comprises a crossover arch and two crossover support poles, where each of the support poles connects to an end portion of the crossover arch such that the support poles are configured to stand perpendicular to the zip track. The extension system further illustratively comprises a connection mechanism configured to connect the crossover arch to the zip track system such that the crossover unit distributes the weight of the track through the crossover arch and the crossover support poles. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] FIG. 1 is a perspective side view of a zip track system in accordance with one embodiment.

[0007] FIG. 2 is a perspective end view of a zip track system in accordance with one embodiment.

[0008] FIG. 3 is an exploded view of a track of a connection scheme of the zip track system of FIG. 1 in accordance with one embodiment.

[0009] FIGS. 4A and 4B are a perspective side view and a perspective end view, respectively, of an extended zip track system in accordance with one embodiment.

[0010] FIG. 5 is an exploded view of a track connection mechanism of the zip track system of FIG. 1 in accordance with one embodiment.

DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS

[0011] A safe, extendable zip track is desired where user can, in a seated position, enjoy the sensation of a conventional zip line play structure, without the limitations of such a conventional structure. Further, a zip track system is desired where an external force is not necessary for an initial movement, in order to engender more exciting, inclusive and safe, play. By introducing a track into the design, a more consistent control over the deceleration is achieved. In addition, this enables different styles of seats to be introduced into the design that allow for a safe use of the product.

[0012] FIG. 1 is a perspective side view of a zip track system 100 in accordance with one embodiment. Zip track system 100 comprises two end platforms 102, in the illustrated embodiment. However, in another embodiment, the zip track system 100 may only have one end platform 102 or may be constructed with no end platforms 102. Zip track system 100 comprises a crossover unit 104 that is connected to the zip track system 100 at a connection point along the zip track system 100 in order to support a longer track 108 as part of the zip track system 100. Track 108 runs from the top of a first end platform 102 to a second end platform 102.

[0013] Zip track system 100 may also comprise, in one embodiment, a seat structure 106. However, in another embodiment, any structure that connects to the track 108 such that it facilitates a user's movement along the track 108 would be adequate, for example a pre-formed seat or a knotted rope structure. The seat structure 106 is configured to accommodate a user comfortably in a seated position. This allows for a larger number of users with a variety of ability levels to enjoy the zip track system 100. For example, for users that do not have sufficient motor function in their upper body and hands, a seat structure, like seat structure 106, allows such ways to still access the zip track system, for example by sitting on the seat structure 106 and wrapping their legs around the connection to hold on.

[0014] As shown in FIG. 1, track 108 comprises at least one inclined portion with incline angle 110 and a straight portion with a length 112. Track 108 preferably has two incline portions, such that a user riding on the seat structure 106, starting at one end platform 102, will go down one incline portion of track 108 across a straight portion of the track 108 and propel, by momentum gained along the first incline portion and the straight portion, back up a second incline portion of the track 108 to the second end platform 102. However, in another embodiment, track 108 could have multiple series of incline portions separated by straight portions. Additionally, in one embodiment the incline angle 110 along a first incline portion 116 is different from incline angle associated with the second incline portion 116. The end platforms 102 may also contain a raised platform 114, such that a user could stand on raised platform 114 as a departure point to ride along track 108 on the seated structure 106. This raised portion 114 ensures that the seat structure 106 does not brush the ground and otherwise damage system 100, or present a danger to a user of the system 100. In the embodiment as shown in FIG. 1, the raised portion 114 is separate from, and not connected to, the zip track system 100. However, in other embodiments, as shown in FIGs. 4A-4B below, the raised portion 114 may also be connected to the zip track system 100.

[0015] FIG. 2 presents a substantially end-on view of the zip track system 100 described above with respect to FIG. 1. Track 108 shown in FIG. 2 comprises an opening of width 118 to accommodate the movement of seat structure 106 along track 108. As shown in FIG. 2, the track curve is modest enough such that it does not present a hazard to a user, but sufficient to allow a user to gather enough momentum along the track 108 to move along the straight portion and back up a second incline portion. FIG. 2 also details another embodiment wherein the seat structure 106 comprises a safety seat that may, in one embodiment, further comprise a safety belt configuration. [0016] FIG. 3 is an exploded view of a track of a connection scheme of the zip track system

100 of FIG. 1 in accordance with one embodiment. Two portions of the track 108, as shown in FIG. 3, connect to each other through and including a crossover connection 304. Each portion of a track 108 may include a track connection portion 302 at one or both ends. For example, in an embodiment comprising multiple crossover units 104, a middle section of a track 108 may include a track connection portion 302 at both a first and second end. In another embodiment, where a track 108 includes only a single crossover unit 104, each portion of a track 108 may only comprise a single track connection portion 302. A first track connection portion 302, in one embodiment, is connected on a first side of the crossover connection 304, on a receiving side. A second track connection portion 302 may be connected on a second side of the crossover connection 304, on a connection side. A connection mechanism 310 may then extend through the second track connection portion 302, through the crossover connection 304, and through the first track connection portion 304 to a connection receiving mechanism 306. In one embodiment, the connection mechanism 310 and the connection receiving mechanism 306 may be a nut and bolt, respectively. Additionally, in other embodiments, other appropriate connection mechanisms may be used to connect the track connection portions 302 to a crossover connection 304. In another embodiment, the track connections 302 and the crossover connection 304 are welded or otherwise fused together.

[0017] One limitation to conventional zip line systems has been the length of the cable. The cable length had to be limited to ensure that the support structure was strong enough to hold the weight of a user along the full length of the cable. One advantage of embodiments of zip track system 400 the ability to stretch the track system across a greater length, providing a longer play experience for a user without sacrificing the strength and safety of the structure. FIG. 4A shows how the crossover units 404 allow for the expansion of zip track system 400 to longer lengths to provide a longer ride for a user of the zip track system 400.

[0018] The crossover units 404 provide strength and structure to the system without interrupting the user experience of the zip track system 400 and, thus, allow for the system to be lengthened by placing the crossover units at regular intervals along the length of the zip track system 400. In one particular embodiment, such as the embodiment shown in FIG. 4A, these crossover units 404 are placed roughly every 200 inches to ensure that sufficient stability is provided to the zip track system 400 along its entire length. However, in another embodiment, the crossover units 404 could be placed more closely together for increased stability, or further apart, for increased length. Crossover units 404 are placed sufficiently apart on the zip track system 400 such that they provide strength and stability throughout the entire unit. These crossover units connect and engage with the zip track system 400 at crossover connection points 408.

[0019] FIG. 4A shows the zip track system 400, in accordance with one embodiment, where the zip track system 400 includes two end platforms 402 with raised structures for a user to stand on before beginning a ride, and after ending a ride on the zip track system 400. The zip track system 400 also includes a seat unit 406 that user may engage in order to ride in a safe fashion along the zip track system 400.

[0020] Conventional zip line systems have employed bars or other methods for users to hang on as they move across the system. However, this presented users with the risk of pinched fingers or risk of falling if the user ran out of strength. Additionally, for users without enough upper body strength, or an inability to use upper body strength (due to disability or other factors), conventional zip line systems were not accessible. However, the zip track system 400, shown in FIG. 4A, through the use of the seat unit 406, allows any user (with the ability to sit and hold on) to use the zip track system 400 such that they can sit on the seat unit 406 and hold on with their hands and / or legs. In another embodiment, the user can stand on the seat unit 406 and hold on with their hands. In either of these positions on the seat unit 406, the user is not required to support their entire body weight through their arms alone.

[0021] Crossover unit 404 is more clearly illustrated in FIG. 4B. The crossover unit comprises a crossover arch 411 that extends from one crossover support pole 410 to a second crossover support pole 410 and connects with the zip track system 400 at a crossover connection 408. This helps to distribute the weight of a user seated on the seat unit 406 through the crossover unit 404 such that the weight is held by the crossover support poles 410 and the crossover arch 411. In one embodiment, the crossover arch 411 is welded to the crossover support poles 410. In another embodiment, the crossover arch 411 is fastened to the crossover support poles 410 such that the crossover unit 404 can be dismantled. For example, in one embodiment the crossover arch 411 is screwed to the crossover support poles 410. In another example, the crossover arch 411 is attached to the crossover support poles 410 with a nut and bolt configuration. [0022] In one embodiment, the crossover connection 408 comprises welding the crossover unit 404 to the track at the center of the crossover arch 411. In another embodiment, the crossover connection 408 comprises a screw system or a nut and bolt structure to connect the crossover arch to the zip track system 400. Additionally, any other suitable connection mechanism that sufficiently attaches the crossover connection 408 to the zip track system 400 such that the weight of the track and any potential user is distributed through the crossover arch 411 and support poles 410 would be adequate.

[0023] While FIGS. 4A and 4B show a zip track system 400 with only two crossover units 404, in another embodiment a zip track system 400 could comprise three crossover units 404, providing an even longer play structure for a user. However, the zip track system 400 is not limited to three crossover units 404, but could comprise five, ten, or more, crossover units 404, such that the system could be as long (or short) as desired by a purchaser / user of the system.

[0024] Additionally, while FIGS. 1-4 show a track system that runs in a substantially straight line, an additional embodiment comprises a zip track system with a curve or a turn, providing a means for compacting the play experience within an enclosed area that would not accommodate an equivalent length zip track to run in a straight line.

[0025] In a further embodiment, instead of inclined portions alternating with straight portions of track, the zip track system 400 could comprise a substantially curved track 408 such that there are no straight portions, but a curved track that substantially alternates an inclined down portion and an inclined up portion. However, in such an embodiment, the inclined portions are configured to alternate in such a way that a user is not jolted from the inclined down portion to the inclined up portion to avoid a jolt to a user of the zip track system 400. Additionally, in one embodiment the track 408 is configured to accommodate sway by a user on the seating structure caused by centripetal force as a user moves along the curved track.

[0026] FIG. 5 is an exploded view of a track connection mechanism of the zip track system

100 of FIG. 1 in accordance with one embodiment. In one embodiment, a trolley 502 sits on a track 500 such that a portion of the trolley 502 is within the track 500, for example as shown in the end view of FIG. 2. In one embodiment, trolley 502 connects to a seat structure 504 through a connecting portion 506. However, in another embodiment, the trolley 502 connects directly to a seat structure 504. In the embodiment including a connection structure 506, the trolley 502 connects through a trolley connection 518 at a trolley connection point 508, while the seat structure 504 connects through a seat connection 516 at a seat connection point 510. Connection mechanisms 512 are used to connect the trolley 502 and the seat structure 504 to the connecting portion 506. In one embodiment, the connection mechanisms 512 may be screws. In another embodiment, the connection mechanism 512 may comprise a nut and bolt configuration or any other appropriate connection mechanism.