GB2379887A

GB2379887A - Improvments in slides

Info

Publication number: GB2379887A
Application number: GB0121359A
Authority: GB
Inventors: Neil John Williams; Damian Stuart Pinson; Martin Smith; Michael John Robotson Coats
Original assignee: SNOWDOME Ltd
Current assignee: SNOWDOME Ltd
Priority date: 2001-09-04
Filing date: 2001-09-04
Publication date: 2003-03-26
Anticipated expiration: 2021-09-04
Also published as: GB0121359D0; GB2379887B

Abstract

An entertainment apparatus for dividing a slide into a plurality of lanes comprises a plurality of lane dividers 104, 105, 106, which may be formed in a number of separable sections (205, 206 Fig 2) and an end zone including side walls 109 and a succession of resilient cushion members 110, 111, 112, 113 arranged to stop a slider. A groundsheet 108 in the end zone 107 serves to anchor the cushion members 110, 111, 112, 113 and to act as a friction surface to slow a slider in the end zone 107. One use for the invention is to divide ski slopes in to lanes for snow-tubing.

Description

IMPROVEMENTS IN SLIDES This invention relates to an entertainment apparatus. The invention is particularly concerned with an apparatus for constraining a person descending a slide to a specified region of the slide. The apparatus is for particular, but not exclusive, use on a ski slope for providing lanes for a slider descending the slope on a resilient torus called a"snow-tube" which may be constituted by an inner tube of a pneumatic tyre.

A common problem for people who desire to enjoy activities on ski slopes is that it takes time, dedication and skill to acquire the ability to descend the slope on skis, snowboards etc. If a person wants to immediately enjoy descending a ski slope without acquiring these skills then they can descend on a snow-tube. However, a person riding such a snow-tube has very limited control on the direction he or she is going. Therefore, on slopes with large direction changes and/or other users, especially for slopes of small width, descending the slope on a snow-tube safely and without interfering with other users can be very difficult.

Another problem for a person on a snow-tube is that if the slope has only a small stopping region at the bottom ending in a hazard such as a road, wall or river, the slider has only a short length of the slope to come to a rest. As the slider has at best only limited control over the snow-tube, such a slope would be dangerous to use for such an activity.

It is an object of the present invention to provide an entertainment facility which may safely and conveniently be used by snow-tube riders.

Accordingly, one aspect of the invention provides an entertainment apparatus comprising a slide separated into two or more lanes by lane dividers and each of the two or more lanes terminating in an arresting

zone for catching a slider, wherein the arresting zone comprises side walls and at its end a succession of resilient cushion members.

The present invention provides an apparatus for assisting a slider on a snow-tube safely down a slide/slope. The arresting zone is arranged to stop a slider safely at the bottom of a slide/slope.

If the slope is sufficiently wide, part may be divided into lanes for use with snow-tubes, and part may be left undivided so as to allow a slider to use a slide safely with other sliders and skiers or snowboarders.

An entertainment apparatus according to this invention allows sliders with limited control to descend a slope safely as they are each confined to a specified region (lane) of the slide governed by the lane dividers and an arresting zone catches the slider bringing the slider to rest safely.

Therefore, the slider does not interfere with other users of the slide outside of their own lane and the arresting zone will protect the slider from any dangerous hazard at the end of the slide. Such an apparatus is particularly useful in indoor ski slopes where the length of the"run off" end of the slope is constrained by the size of the building.

In one arrangement, the arresting zone further comprises a ground sheet.

The ground sheet provides a friction surface for the snow-tube assisting braking of the slider, and it also provides means for anchoring the resilient cushion members by virtue of the overlying weight of a snowtube and rider.

In a different arrangement, the arresting zone comprises an up slope at an end of the slide. The arresting zone slows the slider with the combination of the cushion members absorbing the energy of the slider and the slider slowing as the slider ascends the up slope.

In one arrangement, the entertainment apparatus is provided with a means to lift at least a portion of the lane dividers from the slide. Preferably, the means to lift the lane dividers includes a winch.

This is advantageous as the slide can be used for sliders on snow-tubes during one specified period and then the lane dividers removed so the whole slope can be used by skiers and/or snowboarders in a different period. Furthermore, at different times the lane dividers can be placed in different sections of the slope to be used by the sliders. This provides extra flexibility and efficient use of the slope. No portion of the slope will be over used compared to another portion. On ski slopes utilising different portions of the slope helps to stop the snow from compacting and becoming icy.

In a further arrangement, each of the lane dividers comprises a number of separate sections made of a resilient cushion material. The resilient cushion material provides a barrier which gives when a rider collides with it but may be strong enough to deflect the rider back towards the centre of the lane. The resilient cushion material, which may for example be a foamed plastics material is suitably covered with a flexible waterproof sheath, for example of a polyvinyl chloride.

Each lane divider is suitably held in position by an elongate link which passes through it and is anchored in position at each end. Tension in the cable maintains the alignment of the sections of the lane divider.

In embodiments in which each lane divider is formed in separate sections, each such section may contain an individual length of cable, the various cable lengths being joined together with snap links to form the elongate link. The elongate link will then extend continuously through each section of a lane divider and each section may be detachable from

adjacent sections by snap links or other releasable attachment members in the elongate link.

Such a lane divider can be extended or decreased in length by adding/removing sections as desired and any individual section may easily be removed for repair. Furthermore, the lane divider can be removed from the slide in groups of sections rather than as a whole which might be impractical due to its weight.

In one arrangement, each section of lane divider is of triangular crosssection. Each section is suitably 3 metres in length with an approximately right-angled isosceles triangle cross-section and the length of the equal sides is 300mm. Two sections can therefore be made from a single column of resilient cushion material having a square cross-section by slicing the column into two equal halves. As will be appreciated the sections may have other shaped cross-sections for example square or rectangle. A generally symmetrical triangular section is preferred since this will give a lane-centering effect as a tube slides up onto such a lane divider.

In one arrangement, the slide has portions of different inclinations. Such an undulating slide may be more interesting for sliders descending the slide. In the case where the slide has portions of different inclinations, appropriate sections of the lane dividers are preferably weighted. This overcomes the problem of sections of the lane divider lifting away from the surface of the slide due to the tension in the cable required to maintain alignment of the sections.

Preferably, the sections of the lane dividers can be grouped into a plurality of groups and at least one group is detachable from another group and the lifting means is attachable to at least one of the groups.

Advantageously, the weighted sections can be removed separately from the non-weighted sections on the slide by detaching them from the other sections which can then be either by a winch or by hand. The nonweighted sections can be removed from the slope as groups, which speeds up the removal of the lane dividers.

In some preferred embodiments, a succession of resilient cushion members of the arresting zone each comprises an inflatable chamber, the inflatable chambers of the resilient cushion members being in gas flow communication, and at least one of the inflatable chambers having a vent for releasing air from the chambers during deflation and at least one of the inflatable chambers having an inlet connectable to an air supply.

In another embodiment, the succession of resilient cushion members of the arresting zone comprises foam sleepers substantially perpendicular to the direction of travel of the slider.

Embodiments of the invention will now be described with reference to the accompanying drawings in which :- Figure 1 shows a plan view of a ski slope divided into lanes according to the first embodiment of the invention.

Figure 2 shows a side view of the ski slope of Figure 1.

Figure 3A shows a plan view of a section of a lane divider.

Figure 3B shows an underside view of a section of a lane divider.

Figure 3C shows a cross-section A-A of the lane divider of Figure 3A.

Figure 4 shows a snap-link of the elongate link.

Figure 5A shows a plan view of an interface section of a lane divider.

Figure 5B shows a cross-section E-E of the interface section of the lane divider of Figure 5A.

Figure 5C shows the end of the section shown in Figure 5A.

Figures 6A, 6B and 6C show a section of the elongate link for inserting in the interface section of Figures 5A-5C.

Figures 7A-7J show an arresting zone according to the first embodiment.

Figure 8 shows a side view of an arresting zone according to the second embodiment of the invention.

Figures 9A, 9B and 9C show attachment sections of the arresting zone of the second embodiment.

Figure 10 shows a front view of a pair of arresting zones according to the second embodiment.

Figures 11,12 and 13 show a succession of resilient cushion members according to the second embodiment.

Figures 14,15 and 16 show a sidewall of the arresting zone of Figures 8 and 10.

Figure 17 shows an entertainment apparatus according to the second embodiment.

Shown in Figure 1 is a plan view of a portion of an entertainment apparatus according to a first embodiment of the invention. An entertainment apparatus 100 has a slide 101 separated into two lanes 102 and 103 by three lane dividers 104,105 and 106. Each lane 102 and 103 terminates in an arresting zone 107 for catching a slider. The arresting zone 107 comprises a ground sheet 108, side walls 109 and a succession of resilient cushion members 110-114.

Sections 115 of the lane dividers 104-106 are joined by an elongate link 116 held under tension so as to maintain the alignment of the sections 115 of the lane dividers 104-106. The sections 115 are described in detail below with reference to Figures 3A-6C. The sections form a resilient barrier to confine the slider to a lane 102,103 of the slide. The final sections 115 of the lane dividers 104-106 provide a smooth interface between the lane dividers 104-106 and side walls 109 of the arresting zones 107.

Figure 2 shows a side view of a slide 201 having horizontal portions 202 and inclined portions 203. A lane divider 204 is shown extending down the entire length of the slide. The lane divider has non-weighted sections 205 on the inclined portions 203 of the slide 201 and weighted sections 206 on the horizontal portions of the slide 201. The weighted sections 206 lie flat on the horizontal portions 202 of the slide. If non-weighted sections 205 were used for the entire length of the slide, some sections would lift into the air due to the tension in the cable 207. This is undesirable as the rider or the snow-tube could then pass underneath the lane divider.

Figures 3A, 3B and 3C show a section 300 of the lane divider in detail. Figure 3A is a plan view of the lane divider, Figure 3B a view from underneath the lane divider and Figure 3C a cross-sectional view across section A-A.

The section 300 has a triangular cross-section foam body 301 surrounded in a PVC skin 302. The section is suitably 3 metres long with short sides 308 and 309 of 300 mm. An optional inner body 304 is made of concrete or other dense material in order to weigh the section down if that is required. The PVC skin 302 has a zip 303 attached thereto so that the foam body 301 (with the inner body 304 if present) can be removed and

the foam body 301 or PVC skin 302 replaced or cleaned. The foam may have a nominal density of 96 kg/m3 The section of the PVC skin 302

covering the underneath of the foam body 304 has Velcro strips 305 attached thereto. These Velcro strips are used to grip the snow.

A bore hole 306 runs through the length of the foam body 301 and is designed for receiving a steel cable. The bore hole has an acrylonitrile butadiene styrene (ABS) tube lining 307. Dotted line 310 indicates the position of a cavity in the sections that are weighted. The cavity is provided to receive a concrete post or lintel 304 which adds extra weight to the section.

These sections will give when a slider collides with the section cushioning the impact and the triangular shape will give a lane-centering effect as a tube rides up onto such a lane divider.

Figure 4 shows a snap-link 400 attached by a ferrule 401 to a length of cable 402 which runs through the lane divider section 300. A washer 403 provides a resistant interface between the bore hole 306 (Figure 3C) and the snap-link 400. The snap-link 400 is attachable to snap-links of adjacent sections for forming the continuous link 116, and it also provides a means to detach each section for replacing, lifting etc.

Figures 5A, 5B and 5C show an interface section 500 of the lane dividers 104-106. The interface section has a triangular cross-section at one end 502 and a rectangular cross-section at the other end 503. Therefore, the end 502 is the correct shape to lead into a triangular lane divider section as shown in Figures 3A-3C and the end 503 leads into a wall 109 (Figure 1) dividing two arresting zones 107.

The cross-section E-E of Figure 5a is shown as Figure 5B and it illustrates a steel rod 504 which passes through the centre of the interface

section 500. The steel rod 504 has one loop 505 attached to the end protruding from the end of the section 502 and four loops 506 attached to a plate 507 protruding at end 503 of the section 500. The plate 507 is attached to the steel rod 504 by flanges 508. (See also Figures 6A, 6B).

The internal body 509 of the section 500 is made of reconstituted foam.

Figures 6A-6C show the rod 504 of the interface section 500 in more detail. The plate 507 is attached to the steel rod 504 by a flange 508.

Figures 7A-7J show an arresting zone 701 according to a first embodiment of the invention. 7A shows a plan view of the arresting zone, 7B, 7C and 7F show snap clips and attachment members, 7D a side view of the arresting zone, 7E the underside of the arresting zone and 7G a cross-section of the side wall along line D-D. Figure 7H shows the rear of the arresting zone, 7I a plan view of the resilient cushion members and 7J an underside view of the resilient cushion members.

Figure 7A shows an arresting zone 701 having side walls 702, ground sheet 703 and a succession of resilient cushion members 704-708. The ground sheet 703 is a PVC sheet having a V-shape entrance 709. The ground sheet 703 provides a friction surface for slowing a slider compared to the surface of the slope and weights the arresting zone 701 so that it lays flat on the ground. The V-shaped entrance 709 helps to prevent a snow-tube from burrowing under the ground sheet 703 as a slider enters the arresting zone 701.

The resilient cushion members 704-708 are also shown in Figures 71 and 7J and each comprises an inflatable chamber joined to the adjacent chamber by webbing 709 stitched to the outside of the resilient members.

Each chamber is in gas flow communication with its adjacent chamber (s).

One or more of such chambers is optionally filled with foamed

polystyrene nuts such as are commonly used in the packaging industry. These packing nuts provide a back-up cushion for the slider even when the chambers are not filled with air. This provides a back up system to cushion a slider in a situation where the air supply 715 to the chambers fails, for example due to a failure of the air supply system or to a rip in a cushion wall.

In a specific practical embodiment, the side walls 702 are 400mm high and 300mm wide, and the arresting zone 701 is 15 metres long. As shown in Figure 7G a cable 713 is passed through ABS tubing 714 in the side walls 702. The side walls 702 are joined to interface sections 500 by a ferrule 712 and a snap-link 718. The bodies of the side walls are formed of reconstituted foam 717. A zip 716 extends the entire length of the arresting zone 700 so that the PVC cover and foam 717 can be removed and replaced or cleaned. Webbing 709'provides an interface between webbing 709 and the zip 716.

A rear view of the resilient cushion member 708 at the end of the arresting zone 701 is shown in Figure 7H. That cushion member 708 has two vents 710 and 711 and an air inlet 715. The vents 710 and 711 are covered by flaps hinged at points 719-722. The flaps are held in position by bungee cords (not shown). The inlet 715 is provided in gas flow communication with the chamber 708 and an air supply is arranged to inflate all the chambers in readiness to cushion an impact from a slider.

The vents 710 and 711 are also in gas flow communication with the chamber 708 and air can be forced from the chambers 704-708 through the vents 710,711 when the chambers 704-708 are compacted.

In another embodiment the resilient cushion members of the arresting zone are aligned side by side so as all of their ends face the entrance of the arresting zone and receive the slider together.

In a preferred embodiment, the lanes are 3 metres wide.

A slider descends the entertainment apparatus on a snow-tube. The tube may consist either of a doughnut shaped inflatable chamber, or of a doughnut shaped foam tube. A suitable tube is a conventional pneumatic tyre inner tube which has an overall diameter of 90 cm, an inside hole with a diameter of 40 cm and a tube having a width of 25 cm.

In use, a slider riding a snow-tube descends the slope 101 or 201 in one of the lanes 102,103 rebounding off the sections 115 of the lane divider 104,105, 106 or 204 on the way down thus keeping the slider confined to the lane 102,103. At the bottom, the slider enters into the arresting zone 107, passing from the snow surface of the slope 101,201 to a ground sheet 108,703.

The ground sheet 108,703 slows the slider on the snow-tube. The slider on the snow-tube eventually collides with the succession of resilient cushion members 110-114,704-708 deflating them by forcing air through the chambers and out of the vents 710, 711. This absorbs the energy of the slider and brings the slider to rest. The air supply reinflates the chambers in readiness for the next slider.

After the"Tubing"session has finished the sections 205 are detachable from the sections 206 and a winch (not shown) is provided to lift each group of sections 205 from the slide. Sections 206 are removed by detaching the weighted sections (which may be placed to one side of the slide) and either winching up or removing by hand the remaining sections 206.

In a second embodiment, an arresting zone 800 shown in Figures 8-16 is used to bring the slider to rest. With reference to Figures 8-10, Figure 8 shows a side view of arresting zone, and Figure 10 a front view. The

arresting zone 800 is positioned on a crescent shaped up slope of the slide. Sections 801 of the end of the lane divider lead into the arresting zone 800. The final section is of the type shown in Figure 3A-3C and there is no provision of an interface section as in the first embodiment.

The final section is attached to the slope via a cable 402, Figure 9B.

The arresting zone 800 consists of crescent shaped walls 802 attached both to the slope and to each other by webbing 803. In between the side walls 802 are a succession of resilient cushion members 804 arranged in sleeper fashion one after the other. The resilient cushion members 804 are formed of a reconstituted foam material covered in a PVC skin similar to the sections of the lane divider. In a specific practical embodiment, the lowermost cushion member 804 which forms the first section of the arrester has an inner body of a combustion modified polyether foam grade V24 having a nominal density of 24 kg/m3, a nominal hardness of 115 to 150 N and fatigue class A. It may be softer than the subsequent cushion members which, like the lane dividers, may have a nominal density of 96 kg/m3.

The resilient cushion members 804 are joined by a webbing 805 which extends over the top of the crescent slope to be secured to a secure member such as a post or wall bracket so as the resilient cushion members are suspended on the up slope.

In another embodiment, the up slope is of a different shape for example two sections of different inclinations or a single continuous flat up slope.

Figures 11 and 12 show a front view and side view of the succession of resilient cushion members 804 without the surrounding side walls 802.

Figure 13 shows the cross-section C-C of one resilient cushion member 804. A zip 807 extends along the rear of the cover 808 of the cushion

member so that the reconstituted foam 806 can be removed for replacement or drying, or to facilitate cleaning or repair of the cover 808.

Figures 14 and 15 show a side and front view of the side walls 802 of the arresting zone 800. Figure 16 is a cross-section B-B of the side walls. A zip 807 extends along the cushion members 802 to allow access to the reconstituted foam 808 which forms the body of the cushion members.

The arresting zones 800 are removed from the slope by simply detaching the webbing 803 from the slope and pulling the resilient cushion members 804 over the top of the slope by the webbing 803.

The arresting zone 800 is advantageous over the arresting zone 700 as less man power and resources are required to maintain it than are required for the air mechanical system of the resilient cushion members 704-708. However, the arresting zone 700 is advantageous as it can be used on a slope without an up slope at its end.

Figure 17 shows an entertainment apparatus according to the second embodiment having lanes 102 and 103 ending in arresting zones 800.

In use, a slider on a snow-tube descends the slope in either lane 102 or 103 rebounding off sections 300 of the lane divider. At the bottom, the slider enters the arresting zone 800, slowing as they climb the up slope and collide with the resilient cushion members 804. The slider eventually comes to rest at the slide's minimum height.

Claims

CLAIMS 1. An entertainment apparatus comprising a slide separated into two or more lanes by lane dividers, at least one of the two or more lanes terminating in an arresting zone for catching a slider, wherein the arresting zone comprises side walls and at its end resilient cushion means arranged to stop a slider.
2. Apparatus according to claim 1 wherein the arresting zone further comprises a ground sheet.
3. Apparatus according to claim 2 wherein the groundsheet is arranged to provide a friction surface for assisting braking of the slider.
4. Apparatus according to claim 2 or claim 3 wherein the groundsheet is arranged to provide means for anchoring the resilient cushion means by virtue of the overlying weight of the rider.
5. Apparatus according to any foregoing claim wherein the arresting zone comprises an up slope at an end of the slide.
6. Apparatus according to any foregoing claim including means for lifting at least a portion of the lane dividers from the slide.
7. Apparatus according to any foregoing claim wherein each of the lane dividers comprises a number of separate sections.
8. Apparatus according to any foregoing claim wherein the lane dividers are made of a resilient cushion material.
9. Apparatus according to claim 8 wherein the resilient cushion material is covered with a flexible waterproof sheath.

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10. Apparatus according to any foregoing claim wherein each of the lane dividers is held in position by an elongate link which passes through it and is anchored in position at each end.
11. Apparatus according to claim 10 wherein the elongate link comprises a cable, and tension in the cable is arranged to maintain the alignment of the sections of the lane divider.
12. Apparatus according to claim 10 or claim 11 when dependent on claim 7 wherein each section contains an individual length of said link, the various lengths being joined together to form a single elongate link.
13. Apparatus according to claim 12 wherein said lengths are joined together by releasable attachment means such that the lane divider can be extended or decreased in length by adding or removing sections.
14. Apparatus according to any foregoing claim wherein each section of lane divider is of triangular cross-section.
15. Apparatus according to claim 14 wherein said cross-section is generally symmetrical.
16. Apparatus according to any foregoing claim wherein the slide has portions of different inclinations.
17. Apparatus according to claim 7 or any claim dependent thereon wherein at least some sections of the lane dividers are weighted.
18. Apparatus according to claim 7 or any claim dependent thereon wherein the sections of the lane dividers can be grouped into a plurality of groups and at least one group is detachable from another group.

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19. Apparatus according to claim 17 wherein the weighted sections can be detached from the non-weighted sections.
20. Apparatus according to any foregoing claim wherein the resilient cushion means comprises a plurality of resilient cushion members.
21. Apparatus according to claim 20 wherein resilient cushion members of the arresting zone each include an inflatable chamber, and the inflatable chambers of the resilient cushion members are in gas flow communication with each other.
22. Apparatus according to claim 21 wherein at least one of the inflatable chambers has a vent for releasing air from the chambers during deflation and at least one of the inflatable chambers has an inlet connectable to an air supply.
23. Apparatus according to claim 20 wherein the resilient cushion members of the arresting zone comprises foam sleepers.
24. Apparatus according to any of claims 20 to 23 wherein the resilient cushion members of the arresting zone are substantially perpendicular to the direction of travel of the slider.
25. Apparatus according to any foregoing claim wherein the slide has a first part divided into lanes for use by the slider, and a second part which is left undivided.
26. Entertainment apparatus comprising a plurality of lane dividers for dividing a slide into two or more lanes, and side walls and resilient cushion means arranged to form an arresting zone for catching a slider at the end of the slide.

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27. Apparatus according to claim 26 further comprising a ground sheet arranged to form part of the arresting zone.
28. Apparatus according to claim 27 wherein the groundsheet is arranged to provide a friction surface for assisting braking of the slider.
29. Apparatus according to claim 27 or claim 28 wherein the groundsheet is arranged to provide means for anchoring the resilient cushion members by virtue of the overlying weight of the rider.
30. Apparatus according to any of claims 25 to 29 including means for lifting at least a portion of the lane dividers from the slide.
31. Apparatus according to any of claims 25 to 30 wherein each of the lane dividers comprises a number of separate sections.
32. Apparatus according to any of claims 25 to 31 wherein the lane dividers are made of a resilient cushion material.
33. Apparatus according to claim 32 wherein the resilient cushion material is covered with a flexible waterproof sheath.
34. Apparatus according to any of claims 25 to 33 wherein each of the lane dividers is held in position by an elongate link which passes through it and is anchored in position at each end.
35. Apparatus according to claim 34 wherein the elongate link comprises a cable, and tension in the cable is arranged to maintain the alignment of the sections of the lane divider.
36. Apparatus according to claim 34 or claim 35 when dependent on claim 31 wherein each section contains an individual length of said link, the various lengths being joined together to form a single elongate link.

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37. Apparatus according to claim 36 wherein said lengths are joined together by releasable attachment means such that the lane divider can be extended or decreased in length by adding or removing sections.
38. Apparatus according to any of claims 25 to 37 wherein each section of lane divider is of triangular cross-section.
39. Apparatus according to claim 38 wherein said cross-section is generally symmetrical.
40. Apparatus according to claim 31 or any claim dependent thereon wherein at least some sections of the lane dividers are weighted.

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41. Apparatus according to claim 31 or any claim dependent thereon wherein the sections of the lane dividers can be grouped into a plurality of groups and at least one group is detachable from another group.
42. Apparatus according to claim 40 wherein the weighted sections can be detached from the non-weighted sections.
43, Apparatus according to any of claims 25 to 42 wherein the resilient cushion means comprises a plurality of resilient cushion members.
44. Apparatus according to claim 43 wherein resilient cushion members of the arresting zone each includes an inflatable chamber, and the inflatable chambers of the resilient cushion members are in gas flow communication with each other.
45. Apparatus according to claim 44 wherein at least one of the inflatable chambers has a vent for releasing air from the chambers during deflation and at least one of the inflatable chambers has an inlet connectable to an air supply.

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46. Apparatus according to claim 43 wherein the resilient cushion members comprise foam sleepers.
47. Apparatus according to any of claims 43 to 46 wherein the resilient cushion members are adapted to be arranged substantially perpendicular to the direction of travel of the slider.
48. An entertainment apparatus substantially as hereinbefore described with reference to Figures 1 to 7J or Figures 8 to 17 of the accompanying drawings.