U.S. patent application number 17/095079 was filed with the patent office on 2021-05-13 for sports exercise area with impact attenuating system and impact attenuating system.
The applicant listed for this patent is HaTo World B.V.. Invention is credited to Tomas HUTING.
Application Number | 20210138287 17/095079 |
Document ID | / |
Family ID | 1000005372131 |
Filed Date | 2021-05-13 |
![](/patent/app/20210138287/US20210138287A1-20210513\US20210138287A1-2021051)
United States Patent
Application |
20210138287 |
Kind Code |
A1 |
HUTING; Tomas |
May 13, 2021 |
SPORTS EXERCISE AREA WITH IMPACT ATTENUATING SYSTEM AND IMPACT
ATTENUATING SYSTEM
Abstract
A sports exercise area comprising a landing area comprising an
impact attenuating system for attenuating impact when landing on
the landing area is provided. An impact attenuating system (1; 2)
is provided for attenuating impact onto a landing area, for example
when exercising freestyle sports, gymnastics or athletics. The
impact attenuating system (1) comprises a first inflatable
structure (14). The first inflatable structure (14) comprises a
first sheet (101) and a sheet (102). A first side (111) of the
first sheet is in contact with and connected to a first side (112)
of the second sheet along a first plurality of parallel first
connection lines (103-1, 103-2, 103-2) to form a first plurality
(104) of parallel first air chambers (104-1, 104-2, 104-3). The
first plurality of parallel first air chambers is inflatable to
form a first plurality of parallel first tubular airbags arranged
side-by-side in a first plane substantially parallel to the top
surface of the landing area. A top layer (110) may be provided. A
second inflatable structure (24) may be provided on top of the
first inflatable structure (14).
Inventors: |
HUTING; Tomas; (ME
Amsterdam, NL) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HaTo World B.V. |
ME Amsterdam |
|
NL |
|
|
Family ID: |
1000005372131 |
Appl. No.: |
17/095079 |
Filed: |
November 11, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A63C 19/04 20130101;
A63B 2225/62 20130101; A63B 7/02 20130101; A63B 6/02 20130101; E04F
15/22 20130101; E01C 13/02 20130101; E01C 13/04 20130101; E01C
13/003 20130101; A63B 1/00 20130101; A63B 3/00 20130101; A63C 19/10
20130101 |
International
Class: |
A63B 6/02 20060101
A63B006/02; E04F 15/22 20060101 E04F015/22; E01C 13/02 20060101
E01C013/02; E01C 13/00 20060101 E01C013/00; A63C 19/04 20060101
A63C019/04; A63C 19/10 20060101 A63C019/10; E01C 13/04 20060101
E01C013/04 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 12, 2019 |
NL |
2024218 |
Claims
1. A sports exercise area comprising a landing area and an air
supply unit, the landing area comprising an impact attenuating
system, the impact attenuating system comprising a first inflatable
structure, the first inflatable structure comprising: a first
sheet, and a second sheet, a first side of the first sheet being in
contact with and connected to a first side of the second sheet
along a first plurality of parallel first connection lines to form
a first plurality of parallel first air chambers extending along a
first direction, and the air supply unit being operable to provide
air to the impact attenuating system for providing the landing area
with an impact attenuating surface.
2. The sports exercise area according to claim 1, the impact
attenuating system further comprising a second inflatable
structure, the second inflatable structure comprising: a third
sheet, and a fourth sheet, a first side of the third sheet being in
contact with and connected to a first side of the fourth sheet
along a second plurality of parallel second connection lines to
form a second plurality of parallel second air chambers extending
along a second direction, the second plurality of parallel second
air chambers being arranged on top of the first plurality of first
parallel air chambers.
3. The sports exercise area according to claim 1, the impact
attenuating system further comprising a top layer covering at least
part of the first plurality of parallel first air chambers for
distributing an impact pressure applied to an upper exterior
surface of the impact attenuating system over multiple parallel
first air chambers of the first plurality of parallel first air
chambers.
4. The sports exercise area according to claim 2, the impact
attenuating system further comprising a top layer covering at least
part of the second plurality of parallel second air chambers formed
by the third sheet and the fourth sheet for distributing an impact
pressure applied to an upper exterior surface of the impact
attenuating system over multiple parallel second chambers of the
second plurality of parallel second air chambers.
5. The sports exercise area according to claim 3, the impact
attenuating system further comprising a top layer, the top layer
providing the impact attenuating system with a substantially flat
top impact surface.
6. A sports exercise area according to claim 1, wherein the sports
exercise area is arranged to be selectively operated between an
exercising mode and a production mode, the air supply unit being
arranged to provide air to the impact attenuating system in the
exercising mode for providing the landing area with impact
attenuating surface, the air supply unit being arranged to not
provide air to the impact attenuating system in the production mode
for providing the landing area without an impact attenuating
surface.
7. The sports exercise area according to claim 1, the sport
exercise area being a sports exercise area for a sports selected
from a group of sports consisting of freestyle sports such as
freestyle cycling, freestyle motorbiking, freestyle motocross
(FMX), Bicycle Motocross (BMX), freestyle skiing, snowboarding,
skateboarding, (inline) skating, snow sleds, scootering and alike,
gymnastics, in particular horizontal bar, horizontal rings, vault,
uneven bars, and floor, and athletics, in particular high jump or
pole vault.
8. An impact attenuating system for attenuating impact onto a
landing area, in particular when landing on the landing area when
exercising freestyle sports such as freestyle cycling, freestyle
motorbiking, freestyle motocross (FMX), Bicycle Motocross (BMX),
freestyle skiing, snowboarding, skateboarding, (inline) skating,
snow sleds, scootering and alike, when exercising gymnastics, in
particular horizontal bar, horizontal rings, vault, uneven bars,
and floor, or when exercising athletics, in particular high jump or
pole vault, the impact attenuating system comprising a first
inflatable structure, the first inflatable structure comprising: a
first sheet, and a second sheet, a first side of the first sheet
being in contact with and connected to a first side of the second
sheet along a first plurality of parallel first connection lines to
form a first plurality of parallel first air chambers extending
along a first direction.
9. The impact attenuating system according to claim 8, further
comprising a second inflatable structure, the second inflatable
structure comprising: a third sheet, and a fourth sheet, a first
side of the third sheet being in contact with and connected to a
first side of the fourth sheet along a second plurality of parallel
second connection lines to form a second plurality of parallel
second air chambers extending along a second direction, the second
plurality of parallel second air chambers being arranged on top of
the first plurality of parallel first air chambers,
10. The impact attenuating system according to claim 9, the second
direction being perpendicular to the first direction, or the second
direction being parallel to the first direction, or the second
direction being at 45 degrees relative to the first direction.
11. The impact attenuating system according to claim 1, the first
sheet further being in contact with and connected to the second
sheet along a plurality of enclosures lines enclosing the first
plurality of parallel first air chambers while to form at least one
air supply chamber for distributing air from a first air inlet to
the first plurality of parallel first air chambers.
12. The impact attenuating system according claim 11, the plurality
of enclosures lines comprising at least two enclosure lines
arranged perpendicular to the connection lines and being spaced
apart from the ends of the connection lines as far as these do not
form enclosure lines by at least a distance in a range of 10-100
cm, such as in a range of 20-80 cm, such as in a range of 20-60 cm,
such as in a range of 30-40 cm, measured when the first plurality
of parallel first air chambers are in a deflated state.
13. The impact attenuating system according to claim 1, the first
plurality of parallel first air chambers being inflated with air to
form a first plurality of parallel first tubular airbags arranged
side-by-side in a first plane substantially parallel to the impact
surface.
14. The impact attenuating system according to claim 1, the second
plurality of parallel second air chambers being inflated with air
to form a second plurality of parallel second tubular airbags
arranged side-by-side in a second plane parallel to the first
plane.
15. The impact attenuating system according to claim 8, further
comprising a top layer, the top layer providing the impact
attenuating system with a substantially flat top impact
surface.
16. A method of manufacturing an impact attenuating system, the
method comprising manufacturing a first inflatable structure for an
impact attenuating system, the method comprising: providing a first
sheet, providing a second sheet, bringing a first side of the
second sheet in contact with a first side of the first sheet along
a first plurality of parallel first connection lines, connecting
the first side of the second sheet to the first side of the first
sheet along a first plurality of parallel first connection lines to
form a first plurality of parallel first air chambers extending
along a first direction.
17. A method according to claim 16, further comprising
manufacturing a second inflatable structure, the manufacturing of
the second inflatable structure comprising: providing a third
sheet, and providing a fourth sheet, bringing a first side of the
third sheet being in contact with a first side of the fourth sheet
along a second plurality of parallel second connection lines,
connecting the first side of the third sheet to a first side of the
fourth sheet along a second plurality of parallel second connection
lines to form a second plurality of parallel second air chambers
extending along a second direction, arranging the second plurality
of parallel second air chambers on top of the first plurality of
second parallel air chambers.
18. A method according to claim 16, and the method further
comprising: providing a top layer, covering at least part of the
first plurality of parallel first air chambers formed by the first
sheet and the second sheet with the top layer, so as to provide the
impact attenuating system with an upper exterior surface arranged
for distributing an impact pressure applied to the upper exterior
surface of the impact attenuating system over multiple parallel
first chambers of the first plurality of parallel first air
chambers and/or so as to provide the impact attenuating system with
a substantially flat top impact surface.
19. A method according to claim 17, the method further comprising:
providing a top layer, covering at least part of the second
plurality of parallel first air chambers formed by the third sheet
and the fourth sheet with the top layer, so as to provide the
impact attenuating system with an upper exterior surface arranged
for distributing an impact pressure applied to the upper exterior
surface of the impact attenuating system over multiple parallel
second chambers of the second plurality of parallel second air
chambers and/or so as to provide the impact attenuating system with
a substantially flat top impact surface.
20. Use of an impact attenuating system according to claim 8 for
attenuating impact onto a landing area when landing on the landing
area when exercising sports selected from a group of sports
consisting of: freestyle sports, in particular freestyle cycling,
freestyle motorbiking, freestyle motocross (FMX), Bicycle Motocross
(BMX), freestyle skiing, snowboarding, skateboarding, (inline)
skating, snow sleds, scootering and alike; gymnastics, in in
particular horizontal bar, horizontal rings, vault, uneven bars,
balance beam, floor and trampoline; and athletics, in particular
high jump and pole fault.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority to NL Patent Application
No. 2024218 filed Nov. 12, 2019, the entire contents of each of
which are hereby incorporated by reference.
FIELD
[0002] The invention relates to a sports exercise area with an
impact attenuating system and an impact attenuating system
comprising an inflatable structure, in particular impact an
attenuating system for attenuating impact onto a landing area of a
sports exercise area when exercising freestyle sports such as
freestyle cycling, freestyle motorbiking, freestyle skiing,
(inline) skating, scootering, and alike, when landing onto a
landing area when exercising gymnastics, or when landing onto a
landing area when exercising athletics.
BACKGROUND ART
[0003] When exercising freestyle sports such as freestyle cycling,
freestyle motorbiking, freestyle motocross (FMX), Bicycle Motocross
(BMX), freestyle skiing, snowboarding, skateboarding, inline
skating, snow sleds, scootering and alike, good impact absorption
is important for safety of the athlete, especially when developing,
practicing and exercising new moves and tricks, e.g., jumps with
aerial flips and spins during the so-called aerials of freestyle
skiing, and/or when the risk for falling from some elevation is
considerable. Impact attenuating systems, such as airbags, are
often used for this purpose. For example, the BIGAIRBAG.RTM.
FREESTYLE systems that are currently on the market provide a very
good impact absorption. The BIGAIRBAG.RTM. FREESTYLE systems have a
lower safety zone for reducing the risk of ground contact while
providing stability for a realistic landing and an upper zone
providing optimum impact absorption by releasing air through the
adjustable air valves. The bulb-like shape of the BigAirBag.RTM.
FREESTYLE aims to provide a soft landing while also allowing for an
easy exit and high throughputs. These systems provide a very good
impact absorption. However, when exercising freestyle sports such
as freestyle cycling and freestyle motorbiking, good impact
absorption is just one of many wishes for an impact attenuating
system. For example, the freestyle cyclist or freestyle motor biker
also wants to drive across the impact attenuating system without
being too much disturbed from the impact attenuating system, such
as without experiencing too much bounce. Also, the bulb-like shape
of the BigAirBag.RTM. FREESTYLE may not be optimal for some
situations and some applications. For example, the bulb-like shape
may deviate from the shape of the landing surface in an actual
competition and/or may affect the flying time and thus the moment
of impact when using it for exercising free style sports. There may
e.g. be a wish for thinner systems, for lighter systems, for
systems with a flatter upper surface and/or for systems which adapt
more easily to the underground on which they are placed.
[0004] Also when exercising other kinds of sports, a risk of injury
resulting from an expected or unexpected impact on a surface due
to, for example, a jump, a fall or an incorrect move from the
athlete exists. Especially when jumping or falling from an
elevation onto an area of impact when an athlete is exercising
gymnastics at an elevation such as the horizontal bar and still
rings, or when exercising gymnastics involving jumping and tricks
such high jumps with somersaults and/or twists from the vaulting
platform or on floor, good impact absorption of the area of impact
is important for the safety of the athlete. Thus, various risks may
apply when exercising various types of gymnastics, in particular
horizontal bar, horizontal rings, vault, uneven bars, balance beam,
floor and trampoline. For example, an athlete may miss the
horizontal bar after a somersault over the horizontal bar or after
another element of his exercise, and he may fall unexpected,
sometimes even in an unlucky position or orientation, on the floor.
As another example, an athlete may perform a planned jump at the
end of his horizontal bar exercise but the planned jump may not
always be executed correctly such that the athlete may not land on
his feet, but otherwise and thereby risking to be injured.
Especially when the athlete is practicing new elements (ever and
ever more difficult), the risk of a wrong landing or a fall may be
considerable and a safe landing area wanted. Impact attenuating
system are known to attenuate the impact when exercising
gymnastics, such as BigAirBag.RTM. ADVENTURE or foam fits. Although
some of the known systems provide good impact absorption, they may
not be optimal for some situations and some applications. There may
e.g. be a wish to have thinner systems, e.g. under the still rings
or the horizontal bar or behind the vaulting platform, a wish for
systems that resemble the underlying surface better, e.g. when
exercising a gymnastic floor program. Likewise, good impact
absorption on falling is needed in high jump and pole vault in
athletics, where athletes fall from a significant height onto an
impact attenuating system which provides a relatively safe landing
area. Also in athletics, there is a continued need for better and
better performance, comfort and improved safety, such that there is
a wish for alternative and/or improved impact attenuating
systems.
[0005] Known sports exercise areas and known impact attenuating
systems may thus suffer from various limitations and there is a
wish to provide an impact attenuating system which alleviates at
least one of the mentioned or any unmentioned limitations, or
provides an alternative to existing systems.
SUMMARY
[0006] An aspect of the invention provides a sports exercise area
comprising a landing area and an air supply unit. The sports
exercise area may be a sports exercise area for exercising
freestyle sports such as freestyle cycling, freestyle motorbiking,
freestyle motocross (FMX), Bicycle Motocross (BMX), freestyle
skiing, snowboarding, skateboarding, (inline) skating, snow sleds,
scootering and alike, and the landing area may have a downhill
slope, in particular a varying downhill slope, a combination of a
downhill slope and an uphill slope, or be horizontal. The sports
exercise area may be a sports exercise area for exercising
gymnastics, in particular horizontal bar, horizontal rings, vault,
uneven bars, balance beam, floor and trampoline; the landing area
may herein typically be horizontal, somewhat concave, convex,
and/or at a small inclination angle. The sports exercise area may
be a sports exercise area for athletics, in particular high jump
and pole vault; the landing area may herein typically be
horizontal, somewhat concave, convex, and/or at a small inclination
angle. The sports exercise area may be another type of sports
exercise area where landing from a height onto a landing area may
be involved, e.g., as a risk or as an integral element of the sport
concerned. The landing area comprises an impact attenuating system
The air supply unit is operable to provide air to the impact
attenuating system for providing the landing area with an impact
attenuating surface. Tithe impact attenuating system comprises a
first inflatable structure. The first inflatable structure
comprises a first sheet and a second sheet. The first side of the
first sheet is in contact with and connected to a first side of the
second sheet along a first plurality of parallel first connection
lines to form a first plurality of parallel first air chambers
extending along a first direction.
[0007] In an embodiment, the impact attenuating system of the
sports exercise area further comprises a top layer. The top layer
covers at least part of the first plurality of parallel first air
chambers for distributing an impact pressure applied to an upper
exterior surface of the impact attenuating system over multiple
parallel first air chambers of the first plurality of parallel
first air chambers. In an embodiment, the top layer provides the
impact attenuating system with a substantially flat top impact
surface.
[0008] An embodiment provides another sports exercise area
comprising a landing area and an air supply unit. The landing area
comprises an impact attenuating system. The air supply unit is
operable to provide air to the impact attenuating system for
providing the landing area with an impact attenuating surface. The
impact attenuating system comprises first inflatable structure and
a second inflatable structure. The first inflatable structure
comprises a first sheet and a second sheet. A first side of the
first sheet is in contact with and connected to a first side of the
second sheet along a first plurality of parallel first connection
lines to form a first plurality of parallel first air chambers
extending along a first direction. The second inflatable structure
comprises a third sheet, and a fourth sheet. A first side of the
third sheet is in contact with and connected to a first side of the
fourth sheet along a second plurality of parallel second connection
lines to form a second plurality of parallel second air chambers
extending along a second direction. The second plurality of
parallel second air chambers is arranged on top of the first
plurality of first parallel air chambers.
[0009] In a further embodiment, the impact attenuating system
sports exercise area further comprises a top layer covering at
least part of the second plurality of parallel second air chambers
formed by the third sheet and the fourth sheet for distributing an
impact pressure applied to an upper exterior surface of the impact
attenuating system over multiple parallel second chambers of the
second plurality of parallel second air chambers. In an embodiment,
the top layer provides the impact attenuating system with a
substantially flat top impact surface.
[0010] In other embodiments, the landing area of the sports
exercise area comprises an impact attenuating system according to
any of the embodiments of impact attenuating systems described
below.
[0011] Another aspect of the invention provides an impact
attenuating system for attenuating impact onto a landing area, in
particular a landing area of a sports exercise area. The impact
attenuating system comprises a first inflatable structure. The
first inflatable structure comprises a first sheet, and a second
sheet. A first side of the first sheet is in contact with and
connected to a first side of the second sheet along a first
plurality of parallel first connection lines to form a first
plurality of parallel first air chambers extending along a first
direction.
[0012] The first plurality of parallel first air chambers is
inflatable to form a first plurality of parallel first tubular
airbags arranged side-by-side in a first plane substantially
parallel to surface of the landing area under the impact
attenuating system. When inflated, an array of horizontal,
side-by-side tubular air-bags is achieved to provide an impact
attenuating structure for attenuating shocks when a sportsman is
exercising so-called freestyle sports, in particular when landing
on the landing area. Likewise, when used win gymnastics, the array
of horizontal, side-by-side tubular air-bags provides, when
inflated, an impact attenuating structure for attenuating impact
when a gymnast is landing on the landing area after an unexpected
fall or at a planned, but not perfectly executed, jump such as at
the end of an exercise on the horizontal bar at after a jump of the
vaulting platform. When used with the high jump or the pole vault
in athletics, the array of horizontal, side-by-side tubular
air-bags may provide, when inflated an impact attenuating structure
for attenuating impact after an athlete jumped, or attempted to
jump.
[0013] The impact surface corresponds, during use, to the
externally facing upper surface of the impact attenuating
system.
[0014] The impact attenuating system, when inflated, may be
considered to works as a harmonica: when an objects impacts on one
or some adjacent first tubular airbags below the impact surface,
these airbags reduce in dimension in a direction perpendicular to
the impact surface and perpendicular to the first plane while each
of these one or some adjacent first tubular airbags substantially
maintains its volume, such that they expand in dimension in the
first plane in a direction substantially perpendicular to the first
direction, whereby cause the neighboring first tubular airbags to
reduce in dimension in the first place in the direction
substantially perpendicular to the first direction and/or to be
somewhat replaced in the first plane away from the one or some
adjacent first tubular airbags in the direction substantially
perpendicular to the first direction. The first plurality of
parallel first air chambers may thus be considered to act as an
harmonica upon an impact and replies less than known systems on
elasticity of the airbag material. Thus, the first and second
sheets do not need to be of such a high elasticity as in some prior
art systems With the impact attenuating system, there may be some
air communication between adjacent air chambers when there is an
impact, but the applicant believes that the working mechanism does
not rely on this and that such air communication is not very
relevant for the system to work. After being inflated, the pressure
in and throughout the system is believed to be and remain quite
uniform.
[0015] The first sheet may be impermeable to air, which may further
be referred to as a first air-impermeable sheet. The first sheet
may be semi-impermeable to air, which may further be referred to as
a first air-semi-impermeable sheet. Likewise may the second sheet
may be impermeable to air, which may further be referred to as a
second air-impermeable sheet. The second sheet may be
semi-impermeable to air, which may further be referred to as a
second air-semi-impermeable sheet. The skilled person will
understand which degree of semi-impermeability is suitable for use
in an inflatable structure and requirements and limitations
depending on, e.g., the use of a continuous supply of air using,
e.g., a blower. In the below, air-permeable and
air-semi-impermeable sheets may together also be referred to as a
predominantly air-impermeable sheets or as (at least)
semi-impermeable sheets.
[0016] The first sheet and the second sheet may be made of any
suitable materials, such as PCV-coated textiles, TPU, HDPE and
other plastics. The first sheet and the second sheet may for
example be made of a commercially available tarpaulin from Mehler
Texnologies, which combines properties such as strength,
durability, flexibility and elasticity. Other top sheet materials
may, for example, be HDPE.
[0017] The impact attenuating system may thus provide for an
efficient damping while being thin and light. The impact
attenuating system may thus be easy to transport. The impact
attenuating system may have a much reduced degree of rebound
compared to known systems. The impact attenuating system may be
easy and comfortable to drive across with a bike, motorbike or
alike.
[0018] As impact attenuating system may, in view of its low
thickness and/or its working principle, adapt well to the shape of
the underground that it is placed on. Prior art systems are usually
specially adapted for the targeted use location and shaped to match
the shape of the underground. Prior art systems may easily show
buckles, folds or flexures when placed on an underground with a
different shape than the system as designed for. Embodiments of the
invention may adapt to the shape of the underground better. For
example, in embodiments, a sudden 10.degree. degree change in slope
of the underground may be accommodated for without the attenuating
system being specifically adapted for that change in slope. Another
example, in embodiments, a 90.degree. degree edge in the
underground may be accommodated by arranging the impact attenuating
system with the air chambers extending parallel to the edge,
without the impact attenuating system being specifically adapted
for the specific location with the 90.degree. degree edge.
[0019] In an embodiment, the first side of the first sheet is
connected to the first side of the second sheet along the first
plurality of parallel first connection lines using a plurality of
lines of adhesive, a plurality of lines of glue, a plurality of
glue dots arranged along a line, a plurality of welds, a plurality
of seams, a plurality of stitched seams, and/or a plurality of heat
seals. The adhesive may, e.g., be a pressure sensitive adhesive.
The glue may, e.g., be an epoxy resin. The seams may, e.g., be
stitched seams obtained from stitching with a thread of any type
suitable for airbags. The welds may, e.g., have been made using
ultra-sonic welding or radio-frequent welding. The seals may, e.g.,
have been made using heat sealing. Heat sealing may use hot air
and/or a hot surface for heating at least one of the first and the
second sheet along a line, letting them contact each other while
heated and cooling them while remaining in contact to create the
heat seal line. Connecting the first side of the first sheet to the
first side of the second sheet with continuous lines of adhesive,
continuous lines of glue, continuous welding lines may create a
substantially air-impermeable or air-semi-permeable connection
line. Connecting the first side of the first sheet to the first
side of the second sheet using discontinuous lines of adhesive,
glue or welds or using stitched steams may create connection lines
which are semi-impermeable to air, i.e., which may exhibit a small
degree of leakage between two adjacent first tubular airbags. The
small degree of leakage is well acceptable for the functioning of
the impact attenuating system. Stitching may be, in particular, be
an economically attractive way for connecting the sheets along
connection lines.
[0020] In an embodiment, the first sheet is further in contact with
and connected to the second sheet along a plurality of enclosures
lines enclosing the first plurality of parallel first air chambers
while to form at least one air supply chamber for distributing to
and suppling air from a first air inlet to the first plurality of
parallel first air chambers. The enclosure lines may be formed
using lines of adhesive, lines of glue, lines of glue dots arranged
along a line, welding lines, seams, stitched seams, and/or heat
seal lines. The enclosure lines may be substantially impermeable to
air or, e.g. when stitched seams are used, semi-impermeable to air.
If the enclosure lines are semi-impermeable to air, the small
degree of leakage may well acceptable for the functioning of the
impact attenuating system; to compensate for any leakage, operating
the system with a continuous flow of air, or operating the system
while providing air at regular intervals, may provide the impact
attenuating system with a substantially constant air pressure. The
enclosure lines thus form a first enclosure, with a first air
inlet, which not only encloses the first plurality of parallel
first air chambers together in arrangement of connected air
chambers, but also can distribute the air from the first air inlet
via the at least one air supply chambers to the first plurality of
parallel first air chambers.
[0021] In an embodiment, the connection lines are straight lines.
In alternative embodiments, the connection lines are wobbled lines
or zigzag lines extending along the first direction. In
embodiments, a subset of the plurality of connection lines are
straight lines and another subset of the plurality of connection
lines are lines of a different type. In embodiments, all connection
lines in at least a subset of the connection lines comprise a
straight section and a section of a different type, such as a
straight section and a zigzag section.
[0022] In an embodiment, the plurality of enclosures lines
comprising at least two enclosure lines arranged perpendicular to
the connection lines and being spaced apart from the ends of the
connection lines as far as these do not form enclosure lines. The
spacing of the enclosure lines from the first plurality of parallel
first air chambers creates air supply chambers extending along the
enclosure lines to form at least one first air supply channel from
the first air inlet to the first air chambers of the first
plurality of parallel first air chambers. In embodiments, the at
least two enclosure lines arranged perpendicular to the connection
lines are spaced apart from the ends of the connection lines as far
as these do not form enclosure lines by at least a distance in a
range of 10-100 cm, such as in a range of 20-80 cm, such as in a
range of 20-60 cm, such as in a range of 30-40 cm, measured when
the first plurality of parallel first air chambers are in a
deflated state. Such distances between the enclosure lines and the
first plurality of parallel first air chambers may create an
efficiently air distribution from the first air inlet via the at
least one first air supply channels from the first air inlet to the
first air chambers. Such enclosure lines may be efficient to
manufacture. Such enclosure lines may allow an easy construction as
the air distribution is integrated within the same system.
[0023] In an embodiment, the plurality of enclosure lines comprise
or consist of a plurality of double-stitched seams. For example,
the edges of the first and second sheets may be double-seamed,
folded and stitched again after having been folded to create a
strong and economically attractive connected.
[0024] In an embodiment, the impact attenuating system comprises an
air blower connected to the first air inlet for providing the
impact attenuating system with a continuous flow of air, or for
providing the impact attenuating with air at regular intervals.
[0025] In an alternative embodiment, the impact attenuating system
is arranged to cooperate with an external air blower. The impact
attenuating system may comprise an air inlet connection for
connecting an external air blower to the first air inlet for
providing the impact attenuating system with a continuous flow of
air, or for providing the impact attenuating with air at regular
intervals.
[0026] In an embodiment, the first sheet and the second sheet are
made of the same material. The first sheet and the second sheet
may, e.g., be made of materials commonly used for airbags, such as
the materials used for BigAirBag.RTM. FREESTYLE. The first sheet
and the second sheet may, e.g., be made of technical coated fabrics
comprising TPU, PVC, EVA, or PVC/PU blends and HDPE.
[0027] In embodiments, the first sheet has a first sheet length in
a range of 1-100 meters and a first sheet width in a range of 1-100
meters, such as a first sheet length in a range of 5-100 meters and
a first sheet width in a range of 2-40 meters such as a first sheet
length in a range of 5-80 meters and a first sheet width in a range
of 5-30 meters, such as a first sheet length in a range of 10-50
meters and a first sheet width in a range of 4-10 meters. The
impact attenuating system may thus be made in a wide range of
dimensions, with a suitable dimension selected depending on its
intended application. A high length may be used in the major
direction of use, e.g., the riding direction when landing from a
ramp onto an impact attenuating system on a down-hill slope, to
allow a safe landing at a wide range of distances and a safe
continuation of the riding after the landing. In an example, the
first sheet has a length of 10 meters and a width of 6 meters,
with, for example, connection lines at a spacing of 60 centimeters
to form, when inflated, 45 cm-diameter tubular air bags, extending
in the length direction of the first inflatable structure, i.e., in
the longitudinal direction of a rectangular-shaped first inflatable
structure. In another example, the first sheet has a length of 10
meters and a width of 6 meters, with, for example, connection lines
at a spacing of 60 centimeters to form, when inflated, 45
cm-diameter tubular air bags, extending in the width direction of
the first inflatable structure, i.e., in a direction perpendicular
to the length direction of the first inflatable structure.
[0028] In embodiments, the parallel first connection lines of the
first plurality of parallel first connection lines extend in the
length direction of the first inflatable structure when in a
deflated state. In alternative embodiments, the parallel first
connection lines of the first plurality of parallel first
connection lines extend in the width length direction of the first
inflatable structure when in a deflated state.
[0029] In embodiments, the parallel first connection lines of the
first plurality of parallel first connection lines are spaced apart
at a distance in a range of 10-100 cm, such as in a range of 20-80
cm, such as in a range of 20-60 cm, such as in a range of 30-40 cm,
measured when the first plurality of parallel first air chambers
are in a deflated state. The impact attenuating system may thus be
made with, when inflated, a small thickness compared to some prior
art systems which have a bulb-like shape. The impact attenuating
system may thus be made in a wide range of thicknesses, depending
on its intended application, a suitable thickness selected
depending on its intended application. The smaller the distance,
the smaller the height variation of the top surface of the first
plurality of parallel first air chambers in inflated state will be.
The height variation may be further reduced, and the surface
characteristics influenced, by applying a top layer or top liner on
the top surface; the smaller the distance, the flatter the top
layer or top liner will be arranged and/or the less external force
needs to be applied to the top layer or top liner to achieve a
substantially flat top surface. The larger the distance, the higher
the speed of manufacturing may be. In some embodiments, the
substantially flat top surface is a flat top surface. In other
embodiments, the substantially flat top surface has a height
variation of less than 25%, for example less than 15%, for example
less than 10%, for example less than 5% of the height of an first
tubular airbag in the inflated state, where height variation is
measured as the distance in the vertical plane between the vertical
position of the top surface of the top layer on top of the first
tubular air chamber and the vertical position of the top surface of
the top layer in between two adjacent first tubular air
chambers.
[0030] For example, the plurality of parallel first air chambers
may be inflatable to form the first plurality of parallel first
tubular airbags arranged side-by-side, in the length direction of
the first inflatable structure when in the deflated state, in the
first plane with a long axis of an ellipse-shaped cross-section or
a diameter of a substantially circular cross-section in a range of
4-60 cm, such as in a range of 15-50 cm, such as in a range of
15-40 cm, such as in a range of 20-30 cm, measured when the first
plurality of parallel first air chambers are in an inflated
state.
[0031] In an embodiment, the first plurality of parallel first air
chambers is inflated with air to form a first plurality of parallel
first tubular airbags arranged side-by-side in a first plane
substantially parallel to the impact surface. The impact
attenuating system may thus be operational for use or for
testing.
[0032] In an embodiment, the first plurality of parallel first air
chambers is inflated using a continuous supply of air to form a
first plurality of parallel first tubular airbags arranged
side-by-side in a first plane substantially parallel to the impact
surface. The impact attenuating system may thus be brought to
operation and/or kept operational for use or for testing while any
leakage of air from the impact attenuating system to the exterior
may be compensated for. The impact attenuating system may thus be
provided with a substantially constant internal pressure. The
impact attenuating system may thus be provided with a substantially
constant degree of impact attenuation.
[0033] In an embodiment, the first inflatable structure being
provided in a folded and/or rolled form, the first plurality of
parallel first air chambers not being inflated with air when in the
folded and/or rolled form. The impact attenuating system may thus
be in a compact form, allowing for easy handling and transport.
[0034] In an embodiment, the impact attenuating system further
comprises a top layer covering at least part of the first plurality
of parallel first air chambers for distributing an impact pressure
applied to an upper exterior surface of the impact attenuating
system over multiple parallel first air chambers of the first
plurality of parallel first air chambers. Hereby, the impact is
attenuated by multiple parallel first air chambers. This may
provide for a more smooth landing upon impact. This may allow the
impact attenuating system to better attenuate larger forces and
pressures. This may alternatively or additionally also provide for
a reduced risk of touching the ground surface under the impact
attenuating system. The top layer may, by covering at least part of
the first plurality of parallel first air chambers, be arranged for
distributing an impact pressure applied to an upper exterior
surface of the impact attenuating system over at least two parallel
first air chambers of the first plurality of parallel first air
chambers, such as over at least three or at least four parallel
first air chambers.
[0035] In an embodiment, the impact attenuating system further
comprises a top layer covering a first part of the first plurality
of parallel first air chambers for distributing an impact pressure
applied to an upper exterior surface of the impact attenuating
system over multiple parallel first air chambers of the first
plurality of parallel first air chambers, while a second part of
the first plurality of parallel first air chambers is left
uncovered. E.g., the top layer may not cover the first air chambers
at the exterior side of the parallel, side-by-side arrangement of
the first plurality of parallel first air chambers.
[0036] In embodiments, the top layer covers all the first plurality
of parallel first air chambers for distributing an impact pressure
applied to an upper exterior surface of the impact attenuating
system over multiple parallel first air chambers of the first
plurality of parallel first air chambers. Hereby, all first air
chambers of the first plurality of parallel first air chambers and
the impact may be spread until close to the edge of the impact
attenuating system.
[0037] In embodiments, the top layer further provides the impact
attenuating system with a substantially flat top impact surface.
This may provide for an even more smooth landing upon impact and/or
for a smooth driving surface when continuing driving on the top
surface of the impact attenuating system after landing. When used
with gymnastics, for example with vault jump, such smooth and flat
top impact surface may be advantageous in view of the horizontal
speed that the gymnast may still have when the landing is not
executed perfectly.
[0038] In an embodiment, the top layer is made of or comprises a
technical coated fabric comprising TPU, PVC, EVA, PVC/PU blends
and/or HDPE
[0039] In embodiments, the top layer may be a layer of any suitable
material, such as any relatively flexible air-impermeable material
or semi-permeable material, such as a suitable canvas or another
suitable textile, a suitable PVC-coated textile, a suitable
plastic, a suitable thermoplastic rubber, PVC, polyurethane,
polyethylene, silicone, ethylene vinyl acetate, HDPE, or another
suitable thermoplastic polyurethane elastomer, or any other
suitable material, a coated layer of one of these listed materials
and a coating, e.g., a neoprene-coated fabric, or a laminate of at
least one of these listed materials. A relatively flexible
material, such as PVC-coated textile, may provide for a good
landing characteristics when landing with, for example, a freestyle
motorbike on a down-hill slope.
[0040] In other embodiments, the top layer may be a relatively
stiff material. In embodiment, the top layer has a larger stiffness
than the materials used for the air chambers. Hereby, the
distribution over the impact in length and width over the
inflatable structure(s) below the top layer may be further
enhanced.
[0041] In embodiments, top layer may be a relatively stiff material
that is also relatively smooth, allowing for good landing
characteristics when landing with, for example, a freestyle bicycle
with rubber tires with an appropriate profile on a down-hill slope.
An example of a top layer with such characteristics is a top liner
made from, what is commonly referred to as, "dump truck liner".
With such top layer, a smooth landing surface allowing to
conveniently continue riding after the landing may be obtained.
[0042] In an embodiment, the top layer comprises or is a top sheet.
The top sheet may have uniform characteristics in all directions.
The top sheet may provide uniform characteristics in the length
direction, corresponding to the major direction of motion across
the top sheet when in use, and the perpendicular direction,
corresponding to a direction perpendicular to the major direction
of motion across the top sheet when in use.
[0043] In an embodiment, the top layer comprises or is a top liner.
The top liner may have different characteristics in its length
direction than in the direction perpendicular thereto. The top
liner may provide first characteristics in the length direction,
corresponding to the major direction of motion across the top sheet
when in use, and different second characteristics in the
perpendicular direction, corresponding to a direction perpendicular
to the major direction of motion across the top sheet when in use.
The first and second characteristics may, for example, comprise a
friction coefficient of the liner; the first characteristics may be
associated with a lower friction in the length direction than the
higher friction associated with the second characteristics. A top
liner may be obtained from a roll of liner, e.g. a roll of more
than 100 meters of liner. The top liner may be cut from the roll.
The top liner may, e.g., be a liner usually referred to as "Resi"
liner. As an example, a 6 mm HDPE "Resi" liner may be used.
[0044] In an embodiment, the impact attenuating system further
comprises a second inflatable structure. The second inflatable
structure comprises a third sheet and a fourth sheet. A first side
of the third sheet is in contact with and connected to a first side
of the fourth sheet along a second plurality of parallel second
connection lines to form a second plurality of parallel second air
chambers extending along a second direction. The second plurality
of parallel second air chambers is arranged on top of the first
plurality of second parallel air chambers.
[0045] This embodiment thus provides an impact attenuating system
for attenuating impact onto a landing area, the impact attenuating
system comprising a first inflatable structure and a second
inflatable structure, the first inflatable structure comprising a
first sheet, and a second sheet, a first side of the first sheet
being in contact with and connected to a first side of the second
sheet along a first plurality of parallel first connection lines to
form a first plurality of parallel first air chambers extending
along a first direction the second inflatable structure comprising
a third sheet, and a fourth sheet, a first side of the third sheet
being in contact with and connected to a first side of the fourth
sheet along a second plurality of parallel second connection lines
to form a second plurality of parallel second air chambers
extending along a second direction, the second plurality of
parallel second air chambers being arranged on top of the first
plurality of first parallel air chambers.
[0046] This provides a second inflatable structure, on top of the
first inflatable structure, wherein the second plurality of
parallel second air chambers is inflatable to form a second
plurality of parallel second tubular airbags arranged side-by-side
in a second plane parallel to the first plane.
[0047] The combination of the first inflatable structure and the
second inflatable structure allows additional design freedom and,
for some applications, provides additional advantages than an
impact attenuating system with only one first inflatable structure.
An impact attenuating system with one first inflatable structure
may already adequately meet the technical requirements for some
applications, such as for BMX freestyle. For some applications, the
use of a top layer covering at least part of the first inflatable
structure may be used to better meet the technical requirements for
some applications and/or to provide additional benefits. When using
a the first inflatable structure without a second inflatable
structure, the top layer may be of a relatively stiff material, for
example with a stiffness that allows a top layer of a length of 25
meters of more and a width of 25 meters or less to only easily to
be rolled up on its long direction, for example for transport. For
some other applications, the use of a second inflatable structure
op top of the first inflatable structure, with the second
inflatable structure being arranged perpendicular to the first
inflatable structure, may be preferred due to further improved
performance, for example to provide a further improved impact
attenuation when the sportsman uses a relative heavy sports
equipment is used such as a freestyle motorbike. When using a
second inflatable structure op top of the first inflatable
structure in combination with a top layer on top of the second
inflatable structure and the first inflatable structure, the top
layer may be less stiff than when using only a first inflatable
structure; the top layer may then for example have a stiffness that
allows the top layer to be foldable into a compact package for easy
transport.
[0048] The third and/or fourth sheets may be impermeable to air,
which may further be referred to as a third and fourth
air-impermeable sheet. The third and/or fourth sheet may be
semi-impermeable to air, which may further be referred to as a
third and fourth air-semi-impermeable sheet. In an embodiment, the
second direction is perpendicular to the first direction. Hereby,
the second air chambers of the second inflatable structure are
oriented at a 90 degree angle relative to the first air chambers of
the first inflatable structure. Such arrangement may be beneficial
for impact, landing and/or crossing behavior for some applications,
for example for some specific freestyle sport and/or some specific
location. Other applications may better benefit from other angular
arrangements. Thus, in another embodiment, the second direction is
parallel to the first direction; hereby, the second air chambers of
the second inflatable structure are oriented at a 0 degree angle
relative to the first air chambers of the first inflatable
structure. In again another embodiment, the second direction is at
an angle in a range of 0-90 degrees to the first direction, such as
for example at 30 degrees or 45 degrees.
[0049] In an embodiment, the second plurality of parallel second
air chambers is inflated with air to form a second plurality of
parallel second tubular airbags arranged side-by-side in a second
plane parallel to the first plane. With both the first plurality of
parallel first air chambers as well as the second plurality of
parallel second air chambers being inflated with air, an efficient
attenuating of an impact and/or an improved driving behavior when
driving across the top surface of the impact attenuating system may
be obtained.
[0050] In an embodiment, the first air chambers of the first
inflatable structure extend in the width direction of the impact
attenuating system and the second air chambers of the second
inflatable structure extend in the length direction of the impact
attenuating system. Hereby, the upper of the two inflatable
structures has the air chambers extending in the length direction;
where the length direction is the major direction of use, e.g., is
the downhill direction on a landing slope, a suitable landing
and/or riding surface may be provided.
[0051] In an embodiment, the impact attenuating system further
comprises a top layer covering at least part of the second
plurality of parallel second air chambers formed by the third and
the fourth sheet for distributing an impact pressure applied to an
upper exterior surface of the impact attenuating system over
multiple parallel first second chambers of the second plurality of
parallel second air chambers. Hereby, an improved impact
attenuation may be achieved, and a relatively thin impact
attenuating system may be provided which nevertheless has a good
impact attenuation; for example, a quite uniform degree of impact
attenuation may be achieved irrespective of whether a person
exercising e.g. freestyle BMX lands on a position on the top layer
above a top of one of the second air chambers or above a connection
line between two adjacent second air chambers. As the impact is
attenuated by multiple parallel second air chambers when using such
top layer, this may provide for a more smooth landing upon impact.
This allows the impact attenuating system to better attenuate
larger forces and pressures. This may alternatively or additionally
also provide for a reduced risk of touching the ground surface
under the impact attenuating system. The top layer may, by covering
at least part of the second plurality of parallel second air
chambers, be arranged for distributing an impact pressure applied
to an upper exterior surface of the impact attenuating system over
at least two parallel second air chambers of the second plurality
of parallel second air chambers, such as over at least three or at
least four parallel second air chambers.
[0052] In a further embodiment, the top layer covering at least
part of the second plurality of parallel second air chambers formed
by the third and the fourth sheet further provides the impact
attenuating system with a substantially flat top impact
surface.
[0053] In some embodiments, the substantially flat top impact
surface is a flat top surface of the impact attenuating system. In
other embodiments, the substantially flat top impact surface has a
height variation of less than 25%, for example less than 15%, for
example less than 10%, for example less than 5% of the height of an
second tubular airbag in the inflated state, where height variation
is measured as the distance in the vertical plane between the
vertical position of the top surface of the top layer on top of the
second tubular air chamber and the vertical position of the top
surface of the top layer in between two adjacent second tubular air
chamber.
[0054] In embodiments, the top layer further covering at least part
of the second plurality of parallel second air chambers formed by
the third and the fourth sheet provides the impact attenuating
system with a substantially flat top impact surface.
[0055] Examples of top layer materials were described above with
reference to a top layer covering a first inflatable structure; the
examples mentioned there may be also be used here.
[0056] In a further embodiment, the impact attenuating system
further comprises a third inflatable structure. The impact
attenuating system thus comprises the first inflatable structure
and the second inflatable structure according to embodiments
described above and further comprises a third inflatable structure.
The third inflatable structure comprises a fifth sheet and a sixth
sheet. A first side of the fifth sheet is in contact with and
connected to a first side of the sixth sheet along a third
plurality of parallel third connection lines to form a third
plurality of parallel third air chambers extending along a third
direction. The third plurality of parallel third air chambers is
arranged on top of the second plurality of parallel second air
chambers. The performance and/or appreciation of the impact
attenuating surface may hereby be further improved.
[0057] Further embodiments of a sports exercise area comprising a
landing area and an air supply unit are also provided. The landing
area comprising an impact attenuating system according to any of
the embodiments. The air supply unit is operable to provide air to
the impact attenuating system for providing the landing area with
an impact attenuating surface.
[0058] As the thickness of the impact attenuating system may be
relatively thin compared to known systems, and the impact
attenuating system may follow the structure of the underlying
surface, the sports exercise are may thus be selectively operated
between an exercising mode and a production mode, e.g., used during
a competition and during the final exercising therefore, with quite
similar moment of impact between the two modes. The system may
hereby allow the sportsman to use the same take-off method and
characteristics, such as power of take-off and rotational speed
when jumping and preparing for landing. With known systems, the
sportsman needs to adapt his take off method and characteristics
due to a significant difference between moment of impact with and
without known attenuation impact systems with a significant larger
thickness, and/or the jumper needs to change the setup of the
exercising area. With the sports exercise area according to the
invention, exercising when practicing may thus resemble exercising
when competing.
[0059] In an embodiment, the landing area has a major driving
direction, for example the direction of movement when landing, and
[0060] where the impact attenuating system has a top layer, the air
chambers immediately below the top layer are arranged in parallel
to the major driving direction, or [0061] where the impact
attenuating system has no top layer: the air chambers forming the
upper surface are arranged in parallel to the major driving
direction.
[0062] In an embodiment, the landing area comprises a varying slope
and the impact attenuating system is at least arranged on the
varying slope.
[0063] In an embodiment, the landing area comprises an edge and the
impact attenuating system is at least arranged on the edge.
[0064] In an embodiment, the sports exercise area is arranged to be
selectively operated between an exercising mode and a production
mode, [0065] the air supply unit being arranged to provide air to
the impact attenuating system in the exercising mode for providing
the landing area with impact attenuating surface, [0066] the air
supply unit being arranged to not provide air to the impact
attenuating system in the production mode for providing the landing
area without an impact attenuating surface.
[0067] In an embodiment, the air supply unit being operable to
provide a continuous flow of air to the impact attenuating system
for providing the landing area with an impact attenuating surface
during use.
[0068] In an embodiment, the air supply unit being operable to
selectively provide air to the impact attenuating system for
inflating the impact attenuating system to an inflated state for
providing the landing area with an impact attenuating surface prior
to use and to not provide air to the impact attenuating system
during use, the impact attenuating system being arranged to
maintain in the inflated state for providing the landing area with
an impact attenuating surface during at least a predetermined time
period, the predetermined time period being at least of a
sufficient length for allowing an exercising session. E.g., the
impact attenuating system may be arranged to maintain in the
inflated state for providing the landing area with an impact
attenuating surface during at least a predetermined time period in
a range of 10-120 minutes, such as in a range of 10-60 minutes,
such as in a range of 10-30 minutes.
[0069] According to yet another aspect, the invention provides a
method of selectively operating a sports exercise area according to
any one of the embodiments described herein between an exercising
mode and a production mode, the air supply unit being operated in
the exercising mode to provide air to the impact attenuating system
for providing the landing area with impact attenuating surface in
the exercising mode, and the air supply unit being operated in the
production mode to not provide air to the impact attenuating system
for providing the landing area without an impact attenuating
surface in the production mode.
[0070] According to yet another aspect, the invention provides a
use of an impact attenuating system according to any one of the
embodiments described herein for attenuating impact onto a landing
area when landing on the landing area when exercising freestyle
sports such as freestyle cycling, freestyle motorbiking, freestyle
motocross (FMX), Bicycle Motocross (BMX), freestyle skiing,
snowboarding, skateboarding, (inline) skating, snow sleds,
scootering and alike.
[0071] According to yet another aspect, the invention provides a
use of an impact attenuating system according to any one of the
embodiments described herein for attenuating impact onto a landing
area when landing on the landing area exercising gymnastics, in
particular horizontal bar, horizontal rings, vault, uneven bars,
balance beam, floor and trampoline.
[0072] According to yet another aspect, the invention provides a
use of an impact attenuating system according to any one of the
embodiments described herein for attenuating impact onto a landing
area when landing on the landing area exercising athletics, in
particular high jump and pole fault.
[0073] According to yet another aspect, the invention provides a
method of manufacturing a first inflatable structure for an impact
attenuating system, the method comprising: [0074] providing a first
sheet, [0075] providing a second sheet, [0076] bringing a first
side of the second sheet in contact with a first side of the first
sheet along a first plurality of parallel first connection lines,
[0077] connecting the first side of the second sheet to the first
side of the first sheet along a first plurality of parallel first
connection lines to form a first plurality of parallel first air
chambers extending along a first direction.
[0078] The first plurality of parallel first air chambers is
inflatable to form a first plurality of parallel first tubular
airbags/elements arranged side-by-side in a first plane.
[0079] In an embodiment, the first side of the first sheet is
connected to the first side of the second sheet along the first
plurality of parallel first connection lines using a plurality of
lines of adhesive, a plurality of lines of glue, a plurality of
glue dots arranged along a line, a plurality of welds, a plurality
of seams, a plurality of stitched seams, and/or a plurality of heat
seals.
[0080] According to yet another aspect, the invention provides a
method of manufacturing an impact attenuating system, the method
comprises a method of manufacturing a first inflatable structure
according to any embodiment, and the method further comprises:
[0081] providing a top layer, [0082] covering at least part of the
first plurality of parallel first air chambers formed by the first
sheet and the second sheet with the top layer, so as to provide the
impact attenuating system with a substantially flat top impact
surface.
[0083] The top layer me be a relatively stiff top layer. The top
layer cooperates with the first inflatable structure to
distributing an impact pressure applied to the upper exterior
surface of the impact attenuating system over at least parts of
multiple parallel first chambers of the first plurality of first
second air chambers.
[0084] In an embodiment, the method further comprises: [0085] prior
to the covering of the at least part of the first plurality of
parallel first air chambers with the top layer: inflating the first
plurality of parallel first air chambers to form a first plurality
of parallel first tubular airbags arranged side-by-side in a first
plane.
[0086] According to yet another aspect, the invention provides a
method of manufacturing an impact attenuating system, the method
comprising the method of manufacturing a first inflatable structure
according to any embodiment, and the method further comprising
manufacturing a second inflatable structure, the manufacturing of
the second inflatable structure comprising: [0087] providing a
third sheet, and [0088] providing a fourth sheet, [0089] bringing a
first side of the third sheet being in contact with a first side of
the fourth sheet along a second plurality of parallel second
connection lines, [0090] connecting the first side of the third
sheet to a first side of the fourth sheet along a second plurality
of parallel second connection lines to form a second plurality of
parallel second air chambers extending along a second direction,
[0091] arranging the second plurality of parallel second air
chambers on top of the first plurality of second parallel air
chambers with the second direction being perpendicular to the first
direction.
[0092] The second plurality of parallel second air chambers is
inflatable to form a second plurality of parallel second tubular
airbags arranged side-by-side in a second plane parallel to the
first plane. The method thus provides an impact attenuating system
with the second inflatable structure arranged on top of the first
inflatable structure, with, when inflated, the second plurality of
parallel second tubular airbags of the second inflatable structure
rotated with 90.degree. relative to the first plurality of parallel
first tubular airbags of the first inflatable structure.
[0093] In an embodiment, the method further comprises: [0094]
providing a top layer, [0095] covering at least part of the second
plurality of parallel first air chambers formed by the third sheet
and the fourth sheet with the top layer, so as to provide the
impact attenuating system with an upper exterior surface arranged
for distributing an impact pressure applied to the upper exterior
surface of the impact attenuating system over multiple parallel
second chambers of the second plurality of parallel second air
chambers and/or so as to provide the impact attenuating system with
a substantially flat top impact surface.
[0096] The top layer me be a relatively stiff top layer or a
relatively flexible top layer. The top layer cooperates with the
first inflatable structure to distributing an impact pressure
applied to the upper exterior surface of the impact attenuating
system over at least parts of multiple parallel first chambers of
the first plurality of first second air chambers.
[0097] In an embodiment, the method further comprises: [0098] prior
to the covering of the at least part of the second plurality of
parallel second air chambers with the top layer: inflating the
second plurality of parallel first air chambers to form a second
plurality of parallel second tubular airbags arranged side-by-side
in a second plane.
BRIEF DESCRIPTION OF THE DRAWINGS
[0099] These and other aspects of the invention are apparent from
and will be elucidated with reference to the embodiments described
hereinafter. In the drawings,
[0100] FIGS. 1a-1c, 2a-2c and 3 schematically illustrate a method
of manufacturing an impact attenuating system according to an
embodiment and an impact attenuating system according to an
embodiment,
[0101] FIG. 4 schematically illustrates an impact attenuating
system according to an embodiment; during use,
[0102] FIGS. 5a-5e schematically show some details of some further
embodiments,
[0103] FIG. 6 schematically show some details of embodiments, FIGS.
7a-7c schematically illustrates some aspects of a further method of
manufacturing an impact attenuating system according to a further
embodiment;
[0104] FIG. 8 schematically illustrates an impact attenuating
system according to such further embodiment,
[0105] FIG. 9 schematically shows a method of operation of an
impact attenuating system according to an embodiment,
[0106] FIGS. 10a-10b and 11a-11d schematically illustrate various
embodiments, FIG. 12a-12b schematically illustrates an impact
attenuating system according to again a further embodiment,
[0107] FIGS. 13a-13c schematically illustrate some embodiments of a
sports exercise area an impact attenuating system according to an
embodiment, in particular for freestyle sports, and
[0108] FIGS. 14a-14c schematically illustrate other embodiments of
a sports exercise area an impact attenuating system according to an
embodiment, in particular for gymnastics.
[0109] It should be noted that items which have the same reference
numbers in different Figures, have the same or corresponding
structural features and the same or corresponding functions, or are
the same or corresponding signals. Where the function and/or
structure of such an item has been explained, there is no necessity
for repeated explanation thereof in the detailed description.
DETAILED DESCRIPTION
[0110] Throughout this document, the term "length" and "width"
refer to a length and width dimension of a component, device or
system as such. When a specific orientation is meant to be
indicated by such a term, that is indicated explicitly or by
reference to the use of the component, device or system when
exercising sports.
[0111] Throughout this document, the term "length direction" and
"width direction" refer to the direction along the length and along
the width of a component, device or system as such. When a specific
orientation is meant to be indicated by such a term, that is
indicated explicitly or by reference to the use of the component,
device or system when exercising sports.
[0112] Throughout this document the term "major direction" refers
to the direction in which a user is moving over the system when
exercising freestyle sports, e.g., the direction of riding a BMX
bicycle when landing in a downhill direction when exercising tricks
and moves. The term "perpendicular direction" refers to the
direction in the plane of movement perpendicular to the major
direction.
[0113] Throughout this document, any reference to a specific
freestyle sports is only used for clarification and not intended to
limit to the specific freestyle sports, unless the contrary is
unambiguously implied by the context.
[0114] In the non-limiting examples below, sheets 101, 102, 201,
202 are described to be air-impermeable sheets. The sheets may
alternatively be air-semi-impermeable sheets suitable for
inflatable structures, such as used in known inflatable structures
and such as sheets known to the skilled person.
[0115] FIGS. 1a-1c, 2a-2c and 3 schematically illustrate a method
of manufacturing an impact attenuating system according to an
embodiment and an impact attenuating system according to an
embodiment. FIG. 4 schematically illustrates an impact attenuating
system 1 for attenuating impact=according to an embodiment during
use, in particular upon impact of an object 99.
[0116] The impact attenuating system 1 shown in FIG. 4 comprises a
first inflatable structure 14. The first inflatable structure 14
comprises a first air-impermeable sheet 101 and a second
air-impermeable sheet 102. The first air-impermeable sheet 101 is
connected to the second air-impermeable sheet 102 along a first
plurality 103 of parallel first connection lines 103-1, 103-2,
103-2. More specifically, a first side 111 of the first sheet 101
is in contact with and connected to a first side 112 of the second
sheet 102 along a first plurality 103 of parallel first connection
lines 103-1, 103-2, 103-3. Hereby, the first plurality 103 of
parallel first connection lines 103-1, 103-2, 103-3 form a first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3
extending along a first direction D1.
[0117] The first side 111 of the first sheet 101 is connected to
the first side 112 of the second sheet 102 along the first
plurality of parallel first connection lines 103-1, 103-2, 103-3
using a plurality of lines of adhesive, a plurality of lines of
glue, a plurality of glue dots arranged along a line, a plurality
of welds, a plurality of seams, a plurality of stitched seams,
and/or a plurality of heat seals.
[0118] The first sheet 101 is further in contact with and connected
to the second sheet 102 along a plurality of enclosures lines
115-1, 115-2, 115-3, 115-4 enclosing the first plurality of
parallel first air chambers 104-1, 104-2, 104-3 while to form at
least one air supply chamber 120-1, 120-2 for distributing air from
a first air inlet 120-0 to the first plurality of parallel first
air chambers; reference is also made to FIG. 9.
[0119] The plurality of enclosures lines comprising at least two
enclosure lines 115-1, 115-2 arranged perpendicular to the
connection lines 103-1, 103-2, 103-3 and spaced apart from the ends
of the connection lines as far as these do not form enclosure lines
by at least a distance d115-1, d115-2 in a range of 10-100 cm, such
as in a range of 20-80 cm, such as in a range of 20-60 cm, such as
in a range of 30-40 cm, measured when the first plurality of
parallel first air chambers are in a deflated state.
[0120] The first plurality 104 of parallel first air chambers
104-1, 104-2, 104-3 may be inflated with air to form a first
plurality of parallel first tubular airbags 104-1, 104-2, 104-3
arranged side-by-side in a first plane substantially parallel to
the surface of the underground below the first inflatable structure
and substantially parallel to the top surface of the impact
attenuating system. FIG. 1c illustrate an inflation to a first
degree, where all parallel first tubular airbags 104-1, 104-2,
104-3 have a substantial oval shape. FIG. 3 shown a perspective
illustration of the same.
[0121] The first sheet and the second sheet have dimensions which
may be predetermined according to the intended use. The first sheet
and the second sheet may have dimensions which allow a general use.
The dimensions are indicated in FIG. 2a.
[0122] The first sheet 101 may have a first sheet length l101 in a
range of 1-100 meters and a first sheet width b101 in a range of
1-100 meters, such as a first sheet length in a range of 5-100
meters and a first sheet width in a range of 2-40 meters such as a
first sheet length in a range of 5-80 meters and a first sheet
width in a range of 5-30 meters, such as a first sheet length in a
range of 10-50 meters and a first sheet width in a range of 4-10
meters.
[0123] The second sheet 102 may have a second sheet length l102
equal to the first sheet length l101 and a second sheet width b102
equal to the a first sheet width b101. Alternatively, the first and
second sheet lengths and/or sheet widths may be different to allow
for, e.g., some extra sheet at one or more sides of the inflatable
structure for, e.g., handling and fixation.
[0124] The parallel first connection lines 103-1, 103-2, 103-3 of
the first plurality 103 of parallel first connection lines may be
spaced apart at a distance d113 (shown in FIGS. 1b, 2b and 2c) in a
range of 10-100 cm, such as in a range of 20-80 cm, such as in a
range of 20-60 cm, such as in a range of 30-40 cm, measured when
the first plurality of parallel first air chambers are in a
deflated state. When inflating, the spacing distance between the
parallel first connection lines decreases, as shown in FIG. 4, to
an unloaded spacing d114-1 smaller than d113. When an object 99
impacts on the impact attenuating system 1 shown, at least the
first air chambers below the area of impact reduce in height and
their width d114-5 increases as their volume remains substantially
constant. Also, if a top layer 110 is provided, the impact is
distributed over multiple first air chambers 104-4, 104-5, 104-6
and the adjacent first air chambers 104-4, 104-6 also reduce in
height and their width d114-4 increases. An impact on the impact
attenuating system thus results in an harmonica effect of the first
air chambers below and near the area of impact. This harmonica
effect provides for an efficient and convenient impact
absorption.
[0125] The impact attenuating system may be operated with an air
supply unit 140, as shown in FIG. 9. The first plurality of
parallel first air chambers may be inflated using a continuous
supply of air 121 to form a first plurality of parallel first
tubular airbags 104-1, 104-2, 104-3 arranged side-by-side in a
first plane substantially parallel to the surface of the
underground below the first inflatable structure and substantially
parallel to the top surface of the impact attenuating system. For
easy reference, the same reference signs are used for the partially
or fully inflated first tubular airbags 104-1, 104-2, 104-3 as for
the parallel first air chambers 104-1, 104-2, 104-3 formed before
being connected to an air supply unit.
[0126] The first inflatable structure 14 may, when not inflated, be
provided in a folded and/or rolled form.
[0127] FIG. 4 shows an embodiment of the impact attenuating system
comprising a first inflatable structure 14 and a top layer 110. The
top layer 110 covers the first plurality 104 of parallel first air
chambers for distributing an impact pressure applied to an upper
exterior surface of the impact attenuating system over multiple
parallel first air chambers 104-4, 104-5 of the first plurality 104
of parallel first air chambers. The top layer 110 may alternatively
covers part of the first plurality 104 of parallel first air
chambers, for example as shown in FIG. 6.
[0128] According to embodiments, an impact attenuating system may
comprise a single first inflatable structure 14 and an air inlet
device. Other embodiments of an impact attenuating system,
described below, may additionally comprise a top layer 110 and/or a
second inflatable structure 24.
[0129] A method to manufacture a first inflatable structure 14 for
an impact attenuating system 1 is described with reference to FIGS.
1a-3. The method comprises providing a first air-impermeable sheet
101 and providing a second air-impermeable sheet 102, as shown in
FIG. 1a. Example dimensions are given above. FIGS. 1b and 2b
illustrates that the method further comprises bringing a first side
112 of the second sheet in contact with a first side 111 of the
first sheet along a first plurality of parallel first connection
lines 103-1, 103-2, 103-3 spaced at a distance d113 and connecting
the first side of the second sheet to the first side of the first
sheet along a first plurality of parallel first connection lines
103-1, 103-2, 103-3 to form a first plurality 104 of parallel first
air chambers 104-1, 104-2, 104-3 extending along a first direction
D1. As shown in FIGS. 1c and 3, the first plurality of parallel
first air chambers 104 being inflatable to form a first plurality
of parallel first tubular airbags 104 arranged side-by-side in a
first plane.
[0130] The first side 111 of the first sheet 101 may be connected
to the first side 112 of the second sheet 102 along the first
plurality 103 of parallel first connection lines 103-1, 103-2,
103-2 using a plurality of lines of adhesive, a plurality of lines
of glue, a plurality of glue dots arranged along a line, a
plurality of welds, a plurality of seams, a plurality of stitched
seams, and/or a plurality of heat seals.
[0131] A method of manufacturing an impact attenuating system may
comprise the method of manufacturing a first inflatable structure
as described above, providing an air inlet system for applying air
to the first inflatable structure.
[0132] In another embodiment, a method of manufacturing an impact
attenuating system comprises the method of manufacturing a first
inflatable structure 14 as described above and further comprises
providing a top layer 110 and covering at least part of the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3
formed by the first air-impermeable sheet 101 and the second
air-impermeable sheet 102 with the top layer 110.
[0133] This provides the impact attenuating system with an upper
exterior surface arranged for distributing an impact pressure
applied to the upper exterior surface of the impact attenuating
system 1 over multiple parallel first chambers 104-4, 104-5, 104-6
of the first plurality 104 of parallel first air chambers.
Additionally or alternatively, this may provide the impact
attenuating system with a substantially flat top impact
surface.
[0134] FIGS. 5a-5e schematically shows illustrative examples
indicating how the top layer 110 may be arranged on the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3
and connected. FIG. 6 schematically shows an illustrative example
of another arrangement of the cover layer 110 on the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3
and the connection thereto, where the cover layer is not attached
to the outer first air chambers, but one air chamber inward from
either end of the side-by-side arrangement.
[0135] FIG. 5a schematically shows an illustrative example
indicating how the top layer 110 may be arranged on the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3
when inflated at un unloaded spacing d114. FIG. 5a shows the top
layer 110 being arranged over the first plurality 104 of parallel
first air chambers 104-1, 104-2, 104-3. FIG. 5a schematically shows
that two sides of the top layer 110 are connected to anchors 152 in
the ground 10 via ropes 151 extending through holes in the top
layer (not shown) and hooks 153 fixed in the anchors 152.
Alternative connections between the top layer 110 and the anchors
152 are also possible, e.g. with strips of top-sheet material
replacing ropes 151.
[0136] FIG. 5b schematically shows another illustrative example
indicating how the top layer 110 may be arranged on the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3.
FIG. 5b shows the top layer 110 being arranged over the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3.
FIG. 5b schematically shows that two ends of the top layer 110 are
connected to the ends of the first and/or the second sheet 101, 102
via ropes 161 extending through holes (not shown) in the top layer
and through holes (now shown) in the ends of the first and/or the
second sheet 101, 102. The holes in the ends of the first and/or
the second sheet 101, 102 may, e.g., be formed in parts of the
first and/or the second sheet 101, 102 extending outside the
enclosure lines.
[0137] FIG. 5c schematically shows another illustrative example
indicating how the top layer 110 may be arranged on the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3.
Therein, the top layer 110 is connected to anchors 152 in the
ground 10 in a similar manner as in FIG. 5a using ropes 171
extending through holes in the top layer (not shown) and hooks 153
fixed in the anchors 152. Further, ropes 172 extending through or
connected to two ends of the top layer 110 are connected to ropes
171.
[0138] FIG. 5d schematically shows another illustrative example
indicating how the top layer 110 may be arranged on the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3.
FIG. 5d shows the top layer 110 being arranged over the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3.
FIG. 5d schematically shows that the top layer 110 is attached to
the top areas of outer first parallel air chambers 104-1, 104-3 of
the plurality of first parallel air chambers 104-1, 104-2, 104-3
using connections 110-g. Connections 110-g may e.g. be made using
adhesives or with stitching.
[0139] FIG. 5e schematically shows another illustrative example
indicating how the top layer 110 may be arranged on the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3.
FIG. 5e shows the top layer 110 being arranged over the first
plurality 104 of parallel first air chambers 104-1, 104-2, 104-3.
FIG. 5e schematically shows that the top layer 110 is attached to
the upper side areas of the two outer first parallel air chambers
104-1, 104-3 of the plurality of first parallel air chambers 104-1,
104-2, 104-3 using connections 110-h. Connections 110-h may e.g. be
made using adhesives or with stitching.
[0140] FIG. 6 schematically shows another illustrative example
indicating how the top layer 110 may be arranged on the first
plurality 104 of parallel first air chambers 104-1, 104-2, . . . ,
104-N-1, 104-N. FIG. 6 shows the top layer 110 being arranged over
a subset 104a of the first plurality 104 of parallel first air
chambers 104-1, 104-2, . . . 104-N-1, 104-N. The subset 104a
comprises all but the outer first air chambers of the first
plurality 104 of parallel first air chambers 104-1, 104-2, . . .
104-N-1, 104-N, i.e. the subset 104a comprises parallel first air
chambers 104-2, . . . 104-N-1. FIG. 6 schematically shows that the
top layer 110 is attached to the upper side areas of the two outer
first parallel air chambers 104-2, 104-N-1 of the subset 104a using
connections 110-j. Connections 110-h may e.g. be made using
adhesives or with stitching.
[0141] FIGS. 7a-7c and 8 schematically illustrate a method of
manufacturing another impact attenuating system according to
another embodiment and an impact attenuating system according to
the other embodiment.
[0142] FIG. 8 schematically shows an impact attenuating system 2
comprising a first inflatable structure 14 and a second inflatable
structure 24, in an inflated state. FIG. 8 further shows that the
impact attenuating system 2 comprises a top layer 210; embodiments
of the impact attenuating system 2 may however also be provided
without such top layer 210.
[0143] The first inflatable structure 14 may be similar as
described with reference with FIG. 4. Similar to what was described
with reference to FIG. 2a-2c and FIG. 4, the first inflatable
structure 14 comprises a first air-impermeable sheet 101 and a
second air-impermeable sheet 102. The first air-impermeable sheet
101 is connected to the second air-impermeable sheet 102 along a
first plurality 103 of parallel first connection lines 103-1,
103-2, 103-2. More specifically, a first side 111 of the first
sheet 101 is in contact with and connected to a first side 112 of
the second sheet 102 along a first plurality 103 of parallel first
connection lines 103-1, 103-2, 103-3. Hereby, the first plurality
103 of parallel first connection lines 103-1, 103-2, 103-3 form a
first plurality 104 of parallel first air chambers 104-1, 104-2,
104-3 extending along a first direction D1.
[0144] Similar to what was described with reference to FIG. 2c and
FIG. 4, the first sheet 101 is further in contact with and
connected to the second sheet 102 along a plurality of enclosures
lines 115-1, 115-2, 115-3, 115-4 enclosing the first plurality of
parallel first air chambers 104-1, 104-2, 104-3 while to form at
least one air supply chamber 120-1, 120-2 for distributing air from
a first air inlet 120-0 to the first plurality of parallel first
air chambers.
[0145] Similar to what was described with reference to FIG. 4, the
first plurality 104 of parallel first air chambers 104-1, 104-2,
104-3 may be inflated with air to form a first plurality of
parallel first tubular airbags 104-1, 104-2, 104-3 arranged
side-by-side in a first plane substantially parallel to the surface
of the underground below the first inflatable structure and
substantially parallel to the top surface of the impact attenuating
system.
[0146] Similar to what was described with reference to FIG. 2a and
FIG. 4, the first sheet and the second sheet of the first
inflatable structure 14 have dimensions which may be predetermined
according to the intended use. The first sheet and the second sheet
may have dimensions which allow a general use. The dimensions are
indicated in FIG. 2a. The first sheet 101 may have a first sheet
length l101 in a range of 1-100 meters and a first sheet width b101
in a range of 1-100 meters. The second sheet 102 may have a second
sheet length l102 equal to the first sheet length l101 and a second
sheet width b102 equal to the first sheet width b101.
[0147] The second inflatable structure 24 has a similar
construction, as is shown in FIG. 7a-7c and FIG. 8. The second
inflatable structure 24 comprises a third air-impermeable sheet 201
and a fourth air-impermeable sheet 202. As schematically shown in
FIG. 7b, a first side 211 of the third sheet 201 is in contact with
and connected to a first side 212 of the fourth sheet 202 along a
second plurality 203 of parallel second connection lines 203-1,
203-2, 203-3 to form a second plurality 204 of parallel second air
chambers 204-1, 204-2, 204-3 extending along a second direction D2.
Such impact attenuating system 2, comprising a second inflatable
structure 24 on top of a first inflatable structure 14, where the
second inflatable structure 24 is arranged with the parallel second
air chambers in the major direction of driving across the impact
attenuating system 2, may show very good performance for driving
across with, e.g., a freestyle motorbike, a freestyle BMX or
freestyle snowboard.
As shown in FIG. 7b, similar to what was described with reference
to FIG. 2c and FIG. 4, the third sheet 201 is further in contact
with and connected to the second sheet 202 along a plurality of
enclosures lines 215-1, 215-2, 215-3, 215-4 enclosing the second
plurality 204 of parallel second air chambers 204-1, 204-2, 204-3
while to form at least one second air supply chamber 220-1, 220-2
for distributing air from a second air inlet 220-0 to the second
plurality 204 of parallel second air chambers.
[0148] Similar to what was described with reference to FIG. 4, the
second plurality 204 of parallel second air chambers 204-1, 204-2,
204-3 may be inflated with air to form a second plurality of
parallel first tubular airbags 204-1, 204-2, 204-3 arranged
side-by-side in a second plane substantially parallel to the top
surface of the impact attenuating system, as shown in FIG. 7c.
[0149] The third sheet 201 and the fourth sheet 202 have dimensions
which may be predetermined according to the intended use and in
relation to the dimensions of the first sheet and 101 the second
sheet 102. The first, second, third and fourth sheet may have
dimensions which allow a general use. The dimensions of the third
sheet 201 and fourth sheet 202 are indicated in FIG. 7a. For the
dimensions of the first sheet 101 and second sheet 102, reference
is made to FIG. 2a.
[0150] The third sheet 201 may have a third sheet length 1201 in a
range of 1-100 meters and a third sheet width b201 in a range of
1-100 meters, such as a third sheet length in a range of 5-100
meters and a third sheet width in a range of 2-40 meters such as a
third sheet length in a range of 5-80 meters and a third sheet
width in a range of 5-30 meters, such as a third sheet length in a
range of 10-50 meters and a third sheet width in a range of 4-10
meters.
[0151] The fourth sheet 202 may have a fourth sheet length 1202
equal to the third sheet length 1201 and a fourth sheet width b202
equal to the third sheet width b201. Alternatively, the third and
fourth sheet lengths and/or sheet widths may be different to allow
for, e.g., some extra sheet at one or more sides of the inflatable
structure for, e.g., handling and fixation.
[0152] The parallel second connection lines 203-1, 203-2, 203-3 of
the second plurality 203 of parallel second connection lines may be
spaced apart at a distance d213 (shown in FIGS. 7) in a range of
10-100 cm, such as in a range of 20-80 cm, such as in a range of
20-60 cm, such as in a range of 30-40 cm, measured when the second
plurality of parallel second air chambers are in a deflated state.
FIG. 7c shows that the distance between adjacent second connection
lines is reduced to an unloaded spacing d214-1 when inflated to be
used.
[0153] Thus, in the impact attenuating system shown in FIG. 8, the
second plurality 204 of parallel second air chambers of the impact
attenuating system 24 is arranged on top of the first plurality 104
of first parallel air chambers. The second direction D2 is
perpendicular to the first direction D1, i.e., the second plurality
204 of parallel second air chambers is rotated by 90 degrees
relative to the first plurality 104 of first parallel air chambers.
When inflated with air, the second plurality 204 of parallel second
air chambers forms a second plurality of parallel second tubular
airbags arranged side-by-side in a second plane parallel to the
first plane formed by the first plurality of parallel first tubular
airbags.
[0154] The impact attenuating system 24 shown in FIG. 8 further
comprises a top layer 210 covering at least part of the second
plurality 204 of parallel second air chambers formed by the third
air-impermeable and the fourth air-impermeable sheet for
distributing an impact pressure applied to an upper exterior
surface of the impact attenuating system over multiple parallel
second chambers of the second plurality of parallel second air
chambers.
[0155] In an example of the impact attenuating system 2 shown in
FIG. 8, the impact attenuating system 2 provides for an impact area
of 6 meters wide and 20 meters long, intended for landing and
drive-through when exercising freestyle motorcycling. Hereto:
[0156] the first inflatable structure 14 comprises a first
plurality 104 of 40 parallel first air chambers extending in the
width direction of approximately 50 cm diameter d114, obtained from
a first and second sheet 101, 102 both of a length l101, l102
approximately 35 meters long and a width b101, b102 of
approximately 7 meters wide, stitched together using a spacing s113
between adjacent connection lines 103 of approximately 80 cm;
[0157] the second inflatable structure 24 is arranged on top of the
first inflatable structure 14 and comprises a second plurality 204
of 12 parallel second air chambers extending in the length
direction of approximately 50 cm diameter d214, obtained from a
third and fourth sheet 201, 202 both of a length 1201, 1202
approximately 21 meters long and a width b201, b202 of
approximately 10 meters wide, stitched together using a spacing
s213 between adjacent connection lines 213 of approximately 80 cm;
[0158] the top sheet 210 is arranged to cover the second inflatable
structure and to provide connection holes for connecting the top
sheet to anchors in the ground.
[0159] FIG. 9 schematically shows a method of operation of an
impact attenuating system 500 according to an embodiment. The
impact attenuating system 500 comprises a first inflatable
structure 14. The first inflatable structure 14 comprises a first
air-impermeable sheet 101 and a second air-impermeable sheet 102. A
first side 111 of the first sheet 101 is in contact with and
connected to a first side 112 of the second sheet 102 along a first
plurality 103 of parallel first connection lines 103-1, 103-2,
103-3 to form a first plurality 104 of parallel first air chambers
104-1, 104-2, 104-3 extending along a first direction D1. The first
sheet 101 is further in contact with and connected to the second
sheet 102 along a plurality of enclosures lines 115-1, 115-2,
115-3, 115-4 enclosing the first plurality of parallel first air
chambers 104-1, 104-2, 104-3 while to form at least one air supply
chamber 120-1, 120-2 for distributing air from a first air inlet
120-0 to the first plurality 104 of parallel first air chambers
104-1, 104-2, 104-3. An air supply unit 140 is connected via an air
connection 130 to first air inlet 120-0. The air supply unit 140
attracts air from the environment and supplies the air via the air
connection 130 to the first air inlet 120-0, from where it is
distributed to the first plurality 104 of parallel first air
chambers 104-1, 104-2, 104-3 via the at least one air supply
chamber 120-1, 120-2 as indicated by the open arrows.
[0160] The construction of the inflatable structure itself thus
provides for distribution as the connection lines 103-2, 103-3, as
far as these do not also form the outer wall of the airbag, stop
before the outer walls 115-1, 115-2 where air supply channels
120-1, 120-2 are formed on either side of the tubular air bags. So,
there is no need for additional air supply and air connections on
the exterior of the inflatable structure, as is the usual case for
many known airbag systems such as for example for a kite bladder
and its connections.
[0161] In embodiments, the air supply unit 40 is operated to
continuously supply air during use of the impact attenuating system
to provide for a constant air pressure in the first inflatable
structure 14 while it is used for exercising sports. In other
embodiments, where the first inflatable structure 14 can maintain
its pressure after being inflated for at least an required minimum
time, such as a duration of an exercising session, the air supply
unit 40 is only operated to supply air for inflating the first
inflatable structure 14 prior to use and first air inlet 120-0 or
the air connection 130 may comprises a valve (not shown) allowing
to maintain pressure when the supply unit 40 is not supplying
air.
[0162] Thus, in exemplary embodiments, the supply unit 40 provides,
during use, for a continuous supply of air to the tubular air bags
via the air supply channels 120-1, 120-2. In alternative
embodiments, the supply unit 40 provides, prior to use, air to the
tubular air bags to fill them with air where the system is
sufficiently air tight to keep a sufficient amount of air in all
the tubular air bags for a sufficient amount of use time, i.e., to
keep it inflated without continuously supplying air. In such
alternative embodiments, the blower may be detached after the
system is filled and a valve may be provided in the air inlet 120-0
or air connection 130 to prevent air flowing out of the system
after it has been inflated
[0163] In the embodiments describes above, the parallel connection
lines were shown as straight lines. FIGS. 10a and 10b schematically
illustrate alternative embodiments of the parallel connection
lines.
[0164] FIG. 10a schematically illustrates that the parallel first
connection lines 103-2', 103-3' of the plurality 103' of parallel
first connection lines may alternatively wobble around
corresponding parallel first connection line directions 123-2' all
extending along first direction D1. The shape of the wobbling line
may, e.g., have a continuous first derivative. The shape of the
wobbling line may, e.g., have a continuous first and second
derivative. The shape of the wobbling line may e.g. correspond to a
sine-wave shape. The wobbles of adjacent connection lines are shown
to be in-phase Alternative embodiments with the wobbles of adjacent
connection lines being in opposite phase or non-synchronized are
also possible.
[0165] FIG. 10b schematically illustrates that the parallel first
connection lines 103-2'', 103-3'' of the plurality 103'' of
parallel first connection lines may alternatively zigzag around
corresponding parallel first connection line directions 123-2'.
Such zigzag may also be referred to as sawtooth. The shape of the
zig-zag line may, e.g., be composed of first straight line sections
103s1 and second straight line sections 103s2 at respective angles
.beta.1 and .beta.2 relative to the first direction D1. For
example, first straight line sections 103s1 and second straight
line sections 103s2 may have equal lengths and the first straight
line sections 103s1 arranged at an angle .beta.1 in a range of
10-60 degrees, such as in a range of 10-45 degrees, such as in a
range of 10-30 degrees, and the second straight line sections 103s2
may be arranged at an angle .beta.2=-.beta.1. An another example,
first straight line sections 103s1 are shorter than the second
straight line sections 103s2, the first straight line sections
103s1 arranged at an angle .beta.1 in a range of 10-75 degrees,
such as in a range of 10-60 degrees, such as in a range of 10-30
degrees, and the second straight line sections 103s2 may be
arranged at an angle .beta.2 smaller than the absolute angle
.beta.1. The zigzag line may have rounded edges between the first
and second straight line sections. The zigzags of adjacent
connection lines are shown to be in-phase. Alternative embodiments
with the zigzags of adjacent connection lines being in opposite
phase or non-synchronized are also possible.
[0166] From the above, the skilled person may appreciate that other
shapes can be used for the connection lines in further alternative
embodiments.
[0167] In embodiments with a second inflatable structure having
parallel second connection lines, similar alternative shapes may be
used for the parallel second connection lines as described above
for the parallel first connection lines. Further, the parallel
first connection lines and the parallel second connection lines may
be different. In a non-limiting example, the parallel first
connection lines are wobbling and the parallel second connection
lines are straight.
[0168] In the embodiments describes above, the plurality 115 of
enclosure lines were shown as straight lines. FIG. 10b illustrates
alternative embodiments of a plurality 115' of enclosures lines. A
subset of the plurality 115' of enclosures lines shown in FIG. 10b
are not straight, but have a zig-zag shape, similar to the
connection lines 103-2'' shown in FIG. 10b. In the example show,
the enclosures lines 115-3' and 115-4' extending substantially in
parallel to the connection lines 103'' also have a zigzag shape. In
the example shown, the zigzags of the enclosure lines 105-3' and
105-4', i.e., the ones parallel to the connection lines, are shown
with the same period and phase as the connection lines. However,
they may alternatively be in opposite phase of non-synchronized.
Also, the periods of the zigzag of the enclosure lines and of the
connection lines may be different. The skilled person may
appreciate that other shapes can be used for the enclosure lines in
further alternative embodiments.
[0169] In the embodiments of the impact attenuating system 2 with a
second inflatable structure 24 on top of a first inflatable
structure 14, and in some further embodiments covered with a cover
layer 210, describes above--for example with reference to FIG. 8,
the second inflatable structure 24 was described as being arranged
perpendicular on top of the first inflatable structure 14. FIGS.
11a-11d schematically illustrate alternative embodiments with
different arrangements of the two inflatable structures 14, 24,
where the second inflatable structure 24 was described as being
arranged perpendicular on top of the first inflatable structure 14
is various exemplary angles. It is further noted that additional
inflatable structures could be provided to form an impact
attenuating system with three or even more inflatable structures
stacked on top of each other.
[0170] FIG. 11a schematically illustrates the arrangement of the
first inflatable structure 14 and the second inflatable structure
24 in an embodiment of an impact attenuating system. The first
inflatable structure 14 has, similar as described, above a first
plurality of parallel first air chambers extending along a first
direction D1. The second inflatable structure 24 has, similar as
described above, a second plurality of parallel second air chambers
extending along a second direction D2. The second direction D2 is
at an angle .alpha. relative to the first direction D1. In this
document, this may also be indicated as "the second inflatable
structure is arranged at an angle .alpha. to the first inflatable
structure" or with similar terminology.
[0171] FIG. 11b schematically illustrates an embodiment of an
impact attenuating system wherein the second direction D2 is at an
angle indicated as .alpha.90 relative to the first direction D1,
where .alpha.90=90 degrees. The second plurality of parallel second
air chambers is thus arranged perpendicular to the first plurality
of parallel second air chamber. In this document, this may also be
indicated as "the second inflatable structure is arranged
perpendicular to the first inflatable structure" or with similar
terminology.
[0172] FIG. 11c schematically illustrates an embodiment of an
impact attenuating system wherein the second direction D2 is at an
angle indicated as .alpha.00 relative to the first direction D1,
where .alpha.00=0 degrees. The second plurality of parallel second
air chambers is thus arranged parallel to the first plurality of
parallel second air chamber. In this document, this may also be
indicated as "the second inflatable structure is arranged parallel
to the first inflatable structure" or with similar terminology.
[0173] FIG. 11d schematically illustrates an embodiment of an
impact attenuating system wherein the second direction D2 is at an
angle indicated as .alpha.45 relative to the first direction D1,
where .alpha.45=45 degrees. The second plurality of parallel second
air chambers is thus arranged at a 45 degrees angle to the first
plurality of parallel second air chamber. In this document, this
may also be indicated as "the second inflatable structure is
arranged diagonal to the first inflatable structure" or with
similar terminology.
[0174] The second plurality of parallel second air chambers may
alternatively be thus arranged at other suitable angles to the
first plurality of parallel second air chambers. For example, an
angle of .alpha.=30 degrees may be used.
[0175] FIG. 12a-12b schematically illustrates an impact attenuating
system according to again a further embodiment,
[0176] FIG. 12a schematically shows an impact attenuating system 3
comprising a first inflatable structure 14, a second inflatable
structure 24 and a third inflatable structure 34, in an inflated
state. FIG. 12a further shows that the impact attenuating system 3
comprises a top layer 310; embodiments of the impact attenuating
system 3 may however also be provided without such top layer
310.
[0177] The first inflatable structure 14 and the second inflatable
structure may be similar as described with reference with FIG.
8.
[0178] The first inflatable structure 14 comprises a first
air-impermeable sheet 101 and a second air-impermeable sheet 102.
The first air-impermeable sheet 101 is connected to the second
air-impermeable sheet 102 along a first plurality 103 of parallel
first connection lines 103-1, 103-2, 103-2. More specifically, a
first side 111 of the first sheet 101 is in contact with and
connected to a first side 112 of the second sheet 102 along a first
plurality 103 of parallel first connection lines 103-1, 103-2,
103-3. Hereby, the first plurality 103 of parallel first connection
lines 103-1, 103-2, 103-3 form a first plurality 104 of parallel
first air chambers 104-1, 104-2, 104-3 extending along a first
direction D1. The first plurality 104 of parallel first air
chambers 104-1, 104-2, 104-3 may be inflated with air to form a
first plurality of parallel first tubular airbags 104-1, 104-2,
104-3 arranged side-by-side in a first plane substantially parallel
to the surface of the underground below the first inflatable
structure and substantially parallel to the top surface of the
impact attenuating system.
[0179] The second inflatable structure 24 comprises a third
air-impermeable sheet 201 and a fourth air-impermeable sheet 202. A
first side 211 of the third sheet 201 is in contact with and
connected to a first side 212 of the fourth sheet 202 along a
second plurality 203 of parallel second connection lines 203-1,
203-2, 203-3 to form a second plurality 204 of parallel second air
chambers 204-1, 204-2, 204-3 extending along a second direction D2.
The second plurality 204 of parallel second air chambers 204-1,
204-2, 204-3 may be inflated with air to form a second plurality of
parallel second tubular airbags 204-1, 204-2, 204-3 arranged
side-by-side in a second plane substantially parallel to the top
surface of the impact attenuating system.
[0180] The third inflatable structure 34 comprises a fifth
air-impermeable sheet 301 and a six air-impermeable sheet 302. A
first side 311 of the fifth sheet 301 is in contact with and
connected to a first side 312 of the sixth sheet 302 along a third
plurality 303 of parallel second connection lines (of which one is
indicated as 303-1) to form a third plurality 304 of parallel third
air chambers 304-1, 304-2, 304-3 extending along a third direction
D3. The third plurality 304 of parallel third air chambers 304-1,
304-2, 304-3 may be inflated with air to form a third plurality of
parallel third tubular airbags 304-1, 304-2, 304-3 arranged
side-by-side in a third plane substantially parallel to the top
surface of the impact attenuating system.
[0181] Thus, in the impact attenuating system shown in FIG. 12a,
the second plurality 204 of parallel second air chambers of the
impact attenuating system 34 is arranged on top of the first
plurality 104 of first parallel air chambers, and the third
plurality 304 of parallel third air chambers of the impact
attenuating system 34 is arranged on top of the second plurality
204 of parallel second air chambers of the impact attenuating
system 34.
[0182] The impact attenuating system 34 shown in FIG. 12a further
comprises a top layer 310 covering at least part of the third
plurality 304 of parallel second air chambers formed by the fifth
air-impermeable and the sixth air-impermeable sheet for
distributing an impact pressure applied to an upper exterior
surface of the impact attenuating system over multiple parallel
second chambers of the third plurality of parallel third air
chambers.
[0183] FIG. 12b schematically shows a top view of the impact
attenuating system 3 of FIG. 12a. FIG. 12b schematically shows a
first angle .alpha.12, representing angle between the first
direction D1 and the second direction D2, and second angle
.alpha.13, representing angle between the first direction D1 and
the third direction D3.
[0184] In an embodiment, .alpha.12, is 0 degrees and .alpha.13 is 0
degrees, such that the second plurality 204 of parallel second air
chambers is oriented parallel to the first plurality 104 of
parallel first air chambers and also the third plurality 304 of
parallel third air chambers is oriented parallel to the first
plurality 104 of parallel first air chambers. Hereby, the impact
attenuation may be optimal in a direction of movement along the
impact attenuation surface in some applications, e.g., where the
impact attenuating system is arranged on a downhill slope.
[0185] In an embodiment, .alpha.12, is 90 degrees and .alpha.13 is
0 degrees, such that the second plurality 204 of parallel second
air chambers is oriented perpendicular to the first plurality 104
of parallel first air chambers and such that the third plurality
304 of parallel third air chambers is oriented parallel to the
first plurality 104 of parallel first air chambers. Hereby, the
second plurality 204 of parallel second air chambers may provide
for a more uniform pressure distribution in the horizontal plane
than an arrangement in which they are all parallel.
[0186] In an embodiment, .alpha.12, is 60 degrees and .alpha.13 is
-60 degrees, such that the second plurality 204 of parallel second
air chambers is oriented at 60 degrees to the first plurality 104
of parallel first air chambers, such that the third plurality 304
of parallel third air chambers is oriented at 60 degrees to the
first plurality 104 of parallel first air chambers, and such that
the third plurality 304 of parallel third air chambers is oriented
at 60 degrees to the first plurality 104 of parallel first air
chambers.
[0187] Such impact attenuating system 23 comprising a second
inflatable structure 24 on top of a first inflatable structure 14
and a third inflatable structure 34 on top of second inflatable
structure 24, may show very good impact attenuation performance.
The impact attenuation may e.g. be particular superior compared to
other systems of similar height.
[0188] FIGS. 13a-13b schematically illustrate embodiments of a
sports exercise area comprising an impact attenuating system
according to an embodiment.
[0189] FIG. 13a schematically illustrates an embodiment of a sports
exercise area 510 comprising an impact attenuating system 501
according to an embodiment. The example may for example be a
freestyle motorbike area. The sports exercise area 510 comprises a
jump ramp 511 with a jump surface 513, and a landing ramp 516
comprising a landing area 514, 515. The landing area 514, 515
comprises a varying slope: a first, top part 514 of the landing
area has a major convex slope and a second, lower part 515 of the
landing area has a major concave slope.
[0190] The landing area 514, 515 comprises an impact attenuating
system 501 according to an embodiment. The impact attenuating
system 501 is arranged on the varying slope 514, 515. The sports
exercise area also comprises an air supply unit (not shown). The
air supply unit is operable to provide air to the impact
attenuating system 501 for providing the landing area with an
impact attenuating surface.
[0191] The landing area 514, 515 may comprise an impact attenuating
system 501 according to an embodiment as shown in FIG. 8. The
impact attenuating system 501 may thus have a first inflatable
structure 14 comprising first air chambers in a first direction D1,
corresponding to the width direction, and a second inflatable
structure 24 comprising second air chambers in a second direction
D2, corresponding to the length direction, corresponding to the
major direction of movement when moving down the slope of landing
area 514, 515. The impact attenuating system 501 may have a top
layer 210.
[0192] An alternative landing area 514, 515 may comprise an impact
attenuating system 501 according to an embodiment as shown in any
one of FIG. 4-6. The impact attenuating system 501 may thus have a
first inflatable structure 14 comprising first air chambers in a
direction D2, corresponding to the length direction, corresponding
to the major direction of movement when moving down the slope of
landing area 514, 515. The impact attenuating system 501 may have a
top layer 110. When a relatively stiff top layer is used, an impact
attenuating system with only a first inflatable structure and a top
layer may already provide adequate performance.
[0193] According to an example, the sports exercise area 510 shown
in FIG. 13a is arranged to be selectively operated between an
exercising mode and a production mode. The air supply unit is
arranged to provide air to the impact attenuating system in the
exercising mode for providing the landing area with impact
attenuating surface, while the air supply unit is arranged to not
provide air to the impact attenuating system in the production mode
for providing the landing area without an impact attenuating
surface.
[0194] When exercising, a motorbike driver riding a freestyle
motorbike accelerates on the jump ramp 511 to reach a suitable
speed to jump from the jump surface 513 and then perform any tricks
while being in the air and before landing on the landing area 514,
515 of the landing ramp 516. If the jump is unexpectedly short, he
may land on the first, top part 514 of the landing area. If the
jump is optimally executed, he may land on the part of the landing
area with its transition from the major convex slope to the major
concave slope of the second, lower part 515, or beyond that. Due to
the impact and surface performance of the impact attenuating system
501, he may continue to drive downward on the landing area 514, 515
on a relatively safe and soft surface. In case the tricks fail and
the biker lands out of balance, the impact and surface performance
of the impact attenuating system 501 may often still allow him to
continue driving. If the trick does not succeed, he may fall and
land on a safe impact surface of the impact attenuating system
501.
[0195] Ramps 516 and/or 516 could be a natural ramp, e.g., a shaped
snow slope. The ramp could alternatively be an artificial ramp,
e.g., a man-made construction of for example concrete, metal, wood
and/or any other suitable material(s). The ramp could alternatively
be an inflatable ramp that can be setup almost anywhere. The impact
attenuating system in combination with an inflatable ramps may be
particularly cost effective, mobile and ideal for setting up at
events and competitions.
[0196] FIG. 13b schematically illustrates an embodiment of a sports
exercise area 520 comprising an impact attenuating system 502
according to an embodiment. The example may for example be a
freestyle biking area or, as another example, a freestyle skiing
area. The sports exercise area 520 comprises a shaped jumping hill
521 with a downhill part 522 and a jump surface 523, and a shaped
landing hill 526 comprising a landing area 524, 525. The landing
area 524, 525 comprises a varying slope: a first, top part 524 of
the landing area may start off horizontally and has a major convex
slope and a second, lower part 525 of the landing area has a major
concave slope. In an example, in freestyle skiing, an aerialists
may ski off a shaped jumping hill allowing them to jump up 4 to 6
meters high above the jump surface into the air corresponding to
10-20 meters above the landing height on the sloped landing area.
The landing area for the aerials may at its steepest part have a
downward slope in a range of 20-45 degrees or about 35-100%, for
example in a range of 34 to 39 degrees or about 65-85%. The landing
area for the aerials may have a length of, for example, 20-50
meters, such as 30 meters. During their jumps, aerialists may make
tricks such as one or more twists, back flips, forward flips and
alike. The landing is often a critical part of their jump, such
that a good impact attenuation on the landing surface of the sports
exercise area is wanted, especially when practicing even more
difficult tricks.
[0197] The landing area 524, 525 comprises an impact attenuating
system 501 according to an embodiment. The impact attenuating
system 502 is arranged on the varying slope 524, 525. The sports
exercise are also comprises an air supply unit (not shown). The air
supply unit is operable to provide air to the impact attenuating
system 501 for providing the landing area with an impact
attenuating surface.
[0198] The landing area 524, 525 may comprise an impact attenuating
system 502 according to an embodiment as shown in FIG. 8. The
impact attenuating system 501 may thus have a first inflatable
structure 14 comprising first air chambers in a first direction D1,
corresponding to the width direction, and a second inflatable
structure 24 comprising second air chambers in a second direction
D2, corresponding to the length direction, corresponding to the
major direction of movement when moving down the slope of landing
area 524, 525. The impact attenuating system 501 may have a top
layer 210.
[0199] An alternative landing area 524, 525 may comprise an impact
attenuating system 502 according to an embodiment as shown in any
one of FIG. 4-6. The impact attenuating system 502 may thus have a
first inflatable structure 14 comprising first air chambers in a
direction D2, corresponding to the length direction, corresponding
to the major direction of movement when moving down the slope of
landing area 524, 525. The impact attenuating system 502 may have a
top layer 110. When a relatively stiff top layer is used, an impact
attenuating system with only a first inflatable structure and a top
layer may already provide adequate performance. In some embodiments
and for some applications, an impact attenuating system with only a
first inflatable structure may already be sufficient to accommodate
for the needs of the sportsman.
[0200] FIG. 13c schematically illustrates an embodiment of a sports
exercise area 530 comprising an impact attenuating system 503
according to an embodiment. The example may for example be a
freestyle biking area or a freestyle skiing area where jumps are
performed from a lower elevation such that the landing can be on a
horizontal landing area 534 rather than on a sloped landing area
534 as was described with reference to FIG. 12b. The sports
exercise area 530 comprises a shaped jumping hill 531 with a
downhill part 532 and a jump surface 533, and a horizontal, flat
landing area 534.
[0201] The landing area 534 comprises an impact attenuating system
503 according to an embodiment. The impact attenuating system 503
is arranged on the horizontal landing area 534. The sports exercise
area also comprises an air supply unit (not shown). The air supply
unit is operable to provide air to the impact attenuating system
503 for providing the landing area with an impact attenuating
surface.
[0202] The landing area 534 may comprise an impact attenuating
system 503 according to an embodiment as shown in FIG. 8. The
impact attenuating system 503 may thus have a first inflatable
structure 14 comprising first air chambers in a first direction D1,
corresponding to the width direction, and a second inflatable
structure 24 comprising second air chambers in a second direction
D2, corresponding to the length direction, corresponding to the
major direction of movement when moving over and along the
horizontal landing area 534 after having landed thereon following a
jump from the jump surface 433. The impact attenuating system 503
may have a top layer 210.
[0203] An alternative landing area 534 may comprise an impact
attenuating system 502 according to an embodiment as shown in any
one of FIG. 4-6. The impact attenuating system 503 may thus have a
first inflatable structure 14 comprising first air chambers in a
direction D2, corresponding to the length direction, corresponding
to the major direction of movement when moving over and along the
horizontal landing area 534 after having landed thereon following a
jump from the jump surface 433. The impact attenuating system 503
may have a top layer 110. When a relatively stiff top layer is
used, an impact attenuating system with only a first inflatable
structure and a top layer may already provide adequate performance.
In some embodiments and for some applications, an impact
attenuating system with only a first inflatable structure may
already be sufficient to accommodate for the needs of the
sportsman.
[0204] FIG. 14a schematically illustrates an embodiment of a sports
exercise area 540 comprising an impact attenuating system 504
according to an embodiment. The sports exercise area 540
schematically represents a vault jump area, comprising a runaway
543, a springboard (not shown), a vaulting platform 548 and a
landing area 544 on a horizontal floor 546. The landing area 544
may comprises an impact attenuating system 504 according to any one
of the embodiments described in this document, for example the
impact attenuating system shown in FIG. 8 with a top layer. A
gymnast may thus start on the runaway, jump from the springboard,
punch the vaulting platform, lift off into a flight from the
platform to the landing area while possibly adding movements such
as twists and somersaults, and landing in the landing area 544,
whereby the impact attenuating system, when inflated, may provide
for a safe and comfortable landing if the jump and flight is not
executed perfectly. If the gymnast masters the exercise well, the
impact attenuating system may be deflated to resemble the condition
of the landing area during competition. The gymnast may thus
efficiently change between the two modes of operation, inflated and
deflated, to let the sports exercise area resemble a safe practice
mode when inflated and a competition mode when deflated without
needing to remove and install the impact attenuating system.
[0205] FIG. 14b schematically illustrates an embodiment of a sports
exercise area 550 comprising an impact attenuating system 505
according to an embodiment. The sports exercise area 550
schematically represents a horizontal bar area, comprising a
horizontal bar 558 at an elevated height of typically 2.5 m above
the floor 556 between two stands 559 and a landing area 554 on the
floor 556. The landing area 554 may comprises an impact attenuating
system 505 according to any one of the embodiments described in
this document, for example the impact attenuating system shown in
FIG. 5d with a top layer. A gymnast may thus practice his
horizontal bar exercise while the impact attenuating system 505 of
the landing area 554 is inflated. The impact attenuating system 505
may have provide impact absorption upon a fall from the horizontal
bar while also having a low height, such that it does not take much
free space between the horizontal bar and the floor 556, such that
the gymnast can execute his giant swings, dismount and other
elements without any hinderance of the presence of the inflated
impact attenuating system 505.
[0206] FIG. 14c schematically illustrates an embodiment of a sports
exercise area 560 comprising an impact attenuating system 506
according to an embodiment. The sports exercise area 560
schematically represents a horizontal ring area, comprising a pair
of horizontal rings 568 suspended on wire cable, typically from a
point 5.75 m from the floor 566. A landing area 564 is provided on
the floor 566 below the rings. The landing area 654 may comprises
an impact attenuating system 506 according to any one of the
embodiments described in this document, for example the impact
attenuating system shown in FIG. 5d with a top layer. A gymnast may
thus practice his ring exercise while the impact attenuating system
506 of the landing area 564 is inflated. The impact attenuating
system 506 may have provide impact absorption upon a fall from the
rings while also having a low height, such that it does not take
much free space between the rings and the floor 566, such that the
gymnast can execute his swings, dismount and other elements without
any hinderance of the presence of the inflated impact attenuating
system 506.
[0207] It should be noted that the above-mentioned embodiments
illustrate rather than limit the invention, and that those skilled
in the art will be able to design many alternative embodiments. For
example, the sheets 101, 102, 201, 202 may have different shapes
than the rectangular shapes mentioned in the description. E.g., the
sheets may have rounded corners, have an oval shape, a trapezium
shape, any other suitable shape; for such sheets, the terms length
and width may relate to the length and width of the smallest
rectangle that can enclose the shape. The distance between adjacent
first connection lines may be different from the distance between
adjacent second connection lines. Distance between adjacent
connection lines within a single inflatable structure may all be
the same; alternatively, the distance between connection lines may
vary within an inflatable structure such as to provide, for
example, different diameter air chambers at various heights along a
landing area on a slope. Other embodiments of the impact
attenuating system may comprise three, four or more inflatable
structures on top of each other. More than one air inlets may be
provided on a single inflatable structure. More than one top layer
may be provided.
[0208] In the claims, any reference signs placed between
parentheses shall not be construed as limiting the claim. Use of
the verb "comprise" and its conjugations does not exclude the
presence of elements or steps other than those stated in a claim.
The article "a" or "an" preceding an element does not exclude the
presence of a plurality of such elements. The invention may be
implemented by means of hardware comprising several distinct
elements, and by means of a suitably programmed computer. In the
device claim enumerating several means, several of these means may
be embodied by one and the same item of hardware. The mere fact
that certain measures are recited in mutually different dependent
claims does not indicate that a combination of these measures
cannot be used to advantage.
* * * * *