U.S. patent application number 12/528317 was filed with the patent office on 2011-01-27 for folding trampoline.
Invention is credited to Peter Legg.
Application Number | 20110021321 12/528317 |
Document ID | / |
Family ID | 37945637 |
Filed Date | 2011-01-27 |
United States Patent
Application |
20110021321 |
Kind Code |
A1 |
Legg; Peter |
January 27, 2011 |
FOLDING TRAMPOLINE
Abstract
The present invention relates to a foldable trampoline
comprising a frame for suspending a trampoline mat, the frame being
connected to a support for supporting the frame and wherein the
frame is formed with two wings which can pivotally move between a
deployed position where the wings are substantially horizontal, and
a storage position where the wings are brought towards each other,
each wing having a fixed arm extending from the wing which forms a
lever and directly links the wing to a linear actuator for
controlling the movement of the wings between the deployed and
storage positions. The present invention also relates to a kit of
parts for producing the foldable trampoline.
Inventors: |
Legg; Peter; (Liverpool,
GB) |
Correspondence
Address: |
BLAKELY SOKOLOFF TAYLOR & ZAFMAN LLP
1279 OAKMEAD PARKWAY
SUNNYVALE
CA
94085-4040
US
|
Family ID: |
37945637 |
Appl. No.: |
12/528317 |
Filed: |
February 21, 2008 |
PCT Filed: |
February 21, 2008 |
PCT NO: |
PCT/GB2008/050115 |
371 Date: |
September 29, 2010 |
Current U.S.
Class: |
482/29 |
Current CPC
Class: |
A63B 2071/025 20130101;
A63B 71/022 20130101; A63B 2210/50 20130101; A63B 5/11 20130101;
A63B 21/023 20130101; A63B 2210/56 20130101 |
Class at
Publication: |
482/29 |
International
Class: |
A63B 5/11 20060101
A63B005/11 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 23, 2007 |
GB |
0703576.9 |
Apr 19, 2007 |
CN |
200710090298.X |
Claims
1. A foldable trampoline comprising a frame for suspending a
trampoline mat, the frame being connected to a support for
supporting the frame and being formed with two wings which can
pivotally move between a deployed position where the wings are
substantially horizontal, and a storage position where the wings
are brought towards each other, each wing having a fixed arm
extending from the wing which forms a lever and directly links the
wing to a linear actuator for controlling the movement of the wings
between the deployed and storage positions.
2-41. (canceled)
42. A trampoline as claimed in claim 1, wherein the frame further
comprises a central portion, to which the wings are pivotally
mounted.
43. A trampoline as claimed in claim 42, wherein the wings are
pivotally mounted to either side of the central portion.
44. A trampoline as claimed in claim 1, wherein the linear actuator
is one of the following: a worm gear arrangement, a pulley and
ratchet arrangement, a pneumatic piston arrangement, a hydraulic
pump arrangement, a gas spring and an oil filled damper.
45. A trampoline as claimed in claim 1, comprising a damper to
control the movement of the wings between the deployed and storage
position.
46. A trampoline as claimed in claim 1 in which each fixed arm
extends downwards from its respective wing.
47. A trampoline as claimed in claim 1, comprising a biasing
arrangement which biases the wings towards the deployed position
when the wings are in, or near to, the deployed position, and
biases the wings towards the storage position when the wings are
in, or near to, the storage position.
48. A trampoline as claimed in claim 47, wherein the biasing
arrangement comprises two springs, each spring having a first end
which is coupled to the lever of a respective wing and a second
opposing end which is coupled to the support.
49. A trampoline as claimed in claim 48, wherein the springs are in
an extended configuration when the wings are moved towards the
deployed and storage positions and in a compressed configuration
when the wings are in a position between the deployed and the
storage position.
50. A trampoline as claimed in claim 47, wherein each wing further
comprises a second fixed arm which extends to form a lever that is
coupled to a damper arrangement.
51. A trampoline as claimed in claim 50, wherein the second fixed
arms of the wings are coupled together by means of the damper
arrangement.
52. A trampoline as claimed in claim 1, which further comprises a
locking means for locking the wings in the storage position and/or
the deployed position.
53. A trampoline as claimed in claim 52, wherein the locking means
is disposed adjacently to or at the point of pivotal movement of
the wings.
54. A trampoline as claimed in claim 1, wherein the trampoline
further comprises legs, which are connected to the frame for
stabilising the frame when the wings are in the deployed
position.
55. A trampoline as claimed in claim 54, wherein the legs are
adapted to releasably lock in a downwardly projecting orientation
from the frame when the wings are in the deployed positions.
56. A trampoline as claimed in claim 1, which further comprises an
enclosure comprising an enclosure support which is releasably
attachable to a leg of the trampoline by means of a clamp.
57. A trampoline as claimed in claim 56, wherein the clamp
comprises two clamping members which are pivotally attached to one
another, each clamping member having a clamping surface which is
capable of gripping at least part of the exterior of the leg and
the enclosure support when the clamping members are pivotally moved
towards one another, at least one clamping surface being adapted to
conform to at least part of the profile of the exterior of the leg
or the enclosure support and the clamp further comprising means for
releasably locking the clamping members in position around the leg
and the enclosure support.
58. A trampoline as claimed in claim 57, wherein both clamping
surfaces are adapted to conform to at least part of the profile of
the exterior of the leg and the enclosure support.
59. A trampoline as claimed in claim 1, wherein the shape of the
frame is one of the following: a circle, an oval, a hexagon, an
octagon or a pentagon.
60. A kit of parts for producing a foldable trampoline comprising:
a. a trampoline mat; b. a frame for suspending a trampoline mat,
the frame comprising tubular sections which are joined together to
form two side wings of the trampoline frame, each wing having a
fixed arm extending from the wing for forming a lever; c. a pivot
for allowing the two sides of the trampoline frame to pivotally
move between a deployed position where the wings are substantially
horizontal, and a storage position where the wings are brought
towards each other; d. a support for supporting the frame; e. a
linear actuator coupled to arms extending from the wings for
controlling the movement of the wings between the deployed and
storage positions; and f. suspension means for suspending the
trampoline mat from the frame.
61. A kit of parts for producing a foldable trampoline comprising:
a. a trampoline mat; b. a frame for suspending a trampoline mat,
the frame comprising tubular sections which are joined together to
form two side wings of the trampoline frame, each wing having a
fixed arm extending from the wing for forming a lever; c. a pivot
for allowing the two sides of the trampoline frame to pivotally
move between a deployed position where the wings are substantially
horizontal, and a storage position where the wings are brought
towards each other; d. a support for supporting the frame; e. a
linear actuator coupled to arms extending from the wings for
controlling the movement of the wings between the deployed and
storage positions; and f. suspension means for suspending the
trampoline mat from the frame.
Description
[0001] The present invention relates to folding trampolines.
[0002] Folding trampolines for both domestic and commercial
purposes are known in the art. Folding allows the trampoline to be
stored in smaller spaces than would usually be required if the
trampoline were fully erected and also allows for the trampoline to
be moved easily. However, many trampolines require at least two
people to assist during erection and folding. Furthermore, as the
mats of the trampoline are attached to the trampoline frame by
means of springs, there is a great deal of tension in the
trampoline which can be dangerous to individuals if the trampoline
is not erected or folded in the correct manner.
[0003] U.S. Pat. No. 2,600,572 discloses a collapsible trampoline
having a frame divided into two halves and which is erected by
first tilting the trampoline to one side and unfolding an opposing
side. The trampoline would be difficult (and potentially dangerous)
for a single person to erect or fold due to the high tension within
the trampoline mat.
[0004] U.S. Pat. No. 6,599,221 is directed towards a foldable
trampoline which has a frame comprising peripheral frame members
which are pivotally connected to each other such that it can be
positioned between a first position oriented in an approximately
horizontal configuration forming a trampoline, and a second
position where a portion of the web is oriented at an angle of less
than 180.degree. relative the other portion of the trampoline mat
to thereby form a backstop for ball games. The unfolding mechanism
of this trampoline is complicated.
[0005] EP1674135 describes a trampoline having a trampoline mat
fastened to a surrounding frame for suspending the trampoline mat,
and includes a support for the frame, where the frame is foldable
and has at least two frame sections with a first, collapsed
position for storing and moving the trampoline, and a second,
unfolded position where the frame sections are horizontal. The
mechanism for folding this trampoline is also complicated having
many moving parts.
[0006] It is an object of the present invention to provide an
improved folding trampoline, which can be erected or folded in a
safe and control manner by a single person. It is also an object of
the present invention to provide a folding trampoline, which is
simple in construction and operation.
[0007] In accordance with the present invention, there is provided
a foldable trampoline comprising a frame for suspending a
trampoline mat, the frame being connected to a support for
supporting the frame and wherein the frame is formed with two wings
which can pivotally move between a deployed position where the
wings are substantially horizontal, and a storage position where
the wings are brought towards each other, each wing having a fixed
arm extending from the wing which forms a lever and directly links
the wing to a linear actuator for controlling the movement of the
wings between the deployed and storage positions.
[0008] The present invention provides a foldable trampoline which
is relatively simple in construction and can be moved between a
deployed and a storage position by a single person.
[0009] With regard to the deployed position, the term
"substantially horizontal" should be taken to mean within
20.degree. of the horizontal plane.
[0010] In the storage position, the wings may be substantially
upright. Such an upright configuration may result in the wings
converging or diverging with respect to one another. Alternatively,
the wings may be substantially parallel with respect to one
another.
[0011] Preferably, each wing is coupled independently to the linear
actuator.
[0012] Furthermore, each wing may share points of pivotal movement
at opposing sides of the trampoline frame.
[0013] The frame may further comprise a central portion, to which
the wings are pivotally mounted. Each wing may be pivotally mounted
to either side of the central portion. If a central portion is
present, it is preferred that it remain substantially horizontal in
both the storage and deployed positions. Preferably, the wings are
pivotally connected to ends of the central portion. The frame may
be connected to the support at the central portion. The linear
actuator may be located underneath the central portion of the frame
and on the support.
[0014] In connection with a first embodiment of the present
invention, the linear actuator may be selected from one of the
following linear actuators: a worm gear arrangement, a pulley and
ratchet arrangement, a pneumatic piston arrangement or a hydraulic
pump arrangement. The linear actuator may be manually powered by
means of a crank or pump for example. The crank or pump can be
conveniently located about the stand, for example in a central
position or to one side. Alternatively, the trampoline may further
comprise an electrical drive mechanism for powering the linear
actuator. If an electrical drive mechanism is employed, then it may
be sealed from the elements if necessary so that the trampoline can
be used outdoors. An appropriate gearing mechanism can also be
included to ensure that the linear actuator can be powered by
manual or electrical means.
[0015] In a second embodiment of the present invention, the linear
actuator may comprise a biasing arrangement which is configured so
as to bias the wings towards the deployed and/or storage
position.
[0016] Preferably, the biasing arrangement acts to control the
movement of the wings between the deployed and storage
position.
[0017] It is also preferred that the biasing arrangement exerts
moments upon the points of pivotal movement which are in opposing
directions for each wing. Furthermore, the biasing arrangement may
change its bias when the wings are moved between the deployed and
storage positions. Preferably, the biasing arrangement biases the
wings towards the deployed position when the wings are in, or near
to, the deployed position, and biases the wings towards the storage
position when the wings are in, or near to, the storage
position.
[0018] The biasing arrangement counteracts the force exerted on the
wings by the trampoline mat and thus enables the wings to be moved
between positions easily and safely in addition to counteracting
the weight of the frame in certain positions if necessary.
[0019] It should be understood that the term "trampoline mat" is
intended to include not only the mat itself, but also any
associated articles used to attach the mat to the frame. Examples
of these articles include rubber connectors or trampoline springs
etc.
[0020] The biasing arrangement may comprise a spring. It is
preferred that the biasing means is a gas spring.
[0021] The biasing arrangement may comprise two springs, each
spring having a first end which is coupled to the lever of a wing
and a second opposing end which is coupled to the support.
[0022] The position between a deployed and storage position may be
defined when the force of the spring is in a direction which is
parallel with the point of pivotal movement and the first and
second ends of the spring.
[0023] The springs may be in an extended configuration when the
wings are moved towards the deployed and storage positions and in a
compressed configuration when the wings are in a position between
the deployed and the storage position.
[0024] Preferably, each wing further comprises a second fixed arm
which extends to form a lever that is coupled to a damper
arrangement. The second fixed arms of the wings may be coupled
together by means of the damper arrangement. Preferably, the
dampening arrangement comprises an oil filled damper.
[0025] The following features may be incorporated into both
embodiments of the present invention.
[0026] The arm may be downwardly extending from the wing.
Preferably, the arm downwardly extends from the point of pivotal
movement. The downwardly extending arm may be located beneath the
central portion of the frame, when the wing is in the deployed
position.
[0027] The trampoline may further comprise a locking means for
locking the wings in the storage position and/or the deployed
position. The locking means may comprise individual components
located at different parts of the trampoline, or at a common
location. The provision of a locking means will increase the safety
of the trampoline, and in particular, prevent any unwanted folding
or deployment of the wings during use or storage. The locking means
may be disposed adjacent to, or at the point of pivotal movement of
the wings.
[0028] The locking means may be actuated by means of a
spring-loaded pin. If a spring-loaded pin mechanism is employed, it
may be accommodated at a position adjacent to, or at the point of
pivotal movement. The spring-loaded pin may be located within part
of the frame and capable of extending through an aperture within
the frame. A collar may also be provided which has a larger
internal diameter than the external diameter of the frame so that
the collar can slide freely over the frame. The collar may then be
moved to a position where it covers both the central portion of the
frame and an end of a wing. The spring loaded pin may extend
through the aperture within the frame and protrude from the frame
to such an extent that the collar can no longer slide freely over
the frame and is effectively locked in place over both the central
portion of the frame and an end of a wing. In order to allow the
wings to move again, the pin can be depressed within the frame
aperture to a position which is substantially flush with the frame
so as to permit the collar to slide freely over the frame to a
position where it no longer covers both the central portion of the
frame and the end of a wing.
[0029] Alternatively, the locking means may comprise a hinged
cylindrical collar which is integrally formed as part of the frame
and which is capable of receiving part of the wing or central
portion adjacent to the point of pivotal movement. The collar can
be hinged open to allow the wings to be moved between a closed
position to deployed position without hindrance. However, when the
wings are in the deployed position, the hinged collar can be hinged
closed and held together with fixing means (such as butterfly nut)
so as to lock the wings in the deployed position.
[0030] As a yet further alternative, the locking means may comprise
a bolt which can be used to secure the wings to the central
portion. Such a bolt may pass through an aperture formed in part of
a wing near to the point of pivotal movement and an aperture formed
in the frame and/or stand. When the wings are in a deployed
position and the apertures are lined up with one another, a bolt
can be inserted into both apertures and used to secure the wing to
the frame and/or stand.
[0031] Furthermore, the locking means may comprise a ring collar
which can slide over part of the frame adjacent to, or at, the
point of pivotal movement when the wings are in the deployed
position so as to prevent any unwanted pivotal movement. If
required, the ring collar may be tightened so as to prevent any
movement of the ring collar when in place.
[0032] In order to facilitate movement of the trampoline, the
support may be provided with wheels. Such wheels will preferably
have brakes, so as to prevent movement of the trampoline when it is
stored in a particular location. In one embodiment, it is preferred
that the wheels only engage the floor when the wings are in the
stored position, but not when the wings are in the deployed
position. In an alternative embodiment, the wheels engage the floor
when the wings are in both the storage and deployed position.
[0033] The trampoline may further comprise legs upon which the
frame rests when the wings are in the deployed position. The legs,
which may be connected to the frame, will provide stability to the
trampoline when in use. It is preferred that the legs are capable
of moving from a downwardly projecting position from the frame when
the wings are in the deployed position to a position substantially
parallel with the wing when the wings are raised into the storage
position. If required, the legs can be releasably locked into
position when the wings are either in the deployed or storage
position. The legs may be formed by two downwardly projecting
members originating from the frame which are joined together at the
base by a connecting limb.
[0034] The trampoline may further comprise an enclosure adapted to
upwardly extend around the frame when the wings are in the deployed
position, so as to prevent an individual from falling from the
trampoline. The enclosure may have an access door so as to allow
the surface of the mat to be easily accessed when required. It is
preferred that the enclosure is releasably attached to the legs of
the trampoline.
[0035] The enclosure may be releasably attached to the legs of the
trampoline by a number of ways. In one embodiment, the enclosure
comprises elongated enclosure support members which are attachable
to the legs of the trampoline when in the deployed position and
from which an enclosure net can be suspended.
[0036] Each support member may be formed with an upper portion and
a lower portion. The lower portion being attachable to the legs of
the trampoline, where it may remain in place permanently if
desired. The upper portion can be releasably attached to the lower
portion so that it extends upwardly from the trampoline frame. When
the trampoline is in the deployed position and two or more upper
portions are attached to the lower portion, an enclosure net may be
suspended there between.
[0037] In order to permit the upper and lower portions to be
attached to one another, it is preferred that a spring loaded pin
arrangement is utilised. The spring loaded pin arrangement has been
previously described in connection with the locking means. The
upper end of the lower portion may terminate in a cylindrical
section having a slightly smaller exterior diameter than the
internal diameter of the upper section. The spring loaded pin can
protrude thorough an aperture in the cylindrical section of the
lower portion. When the pin is depressed, the upper section is able
to slide over the cylindrical section of the lower portion and the
spring can push the pin through an aperture located on the upper
portion when both apertures are in alignment. In order to remove
the upper portion from the lower portion, the pin is simply
depressed to a point where it is no longer received in the aperture
of the upper portion and the upper portion can be removed from the
lower portion by means of sliding the upper portion away from the
lower portion.
[0038] The trampoline may be made in a number of shapes. For
example, the shape of the frame may be one of the following shapes:
a circle, an oval, an octagon, hexagon or a pentagon. If the frame
is in the shape of an octagon or a pentagon, a leg may be formed by
two downwardly projecting members as described earlier, where a
first member is located on one side the octagon or pentagon and a
second member is located on an adjacent side.
[0039] In accordance with another aspect of the present invention,
there is provided a clamp for clamping at least two elongate
members together, such that the two elongate members are clamped in
positions which are substantially parallel to one another, the
clamp comprising two clamping members which are pivotally attached
to one another, each clamping member having a clamping surface
which is capable of gripping at least part of the exterior of the
elongate members when the clamping members are pivotally moved
towards one another, at least one clamping surface being adapted to
conform to at least part of the profile of the exterior of one of
the elongate members and the clamp further comprising means for
releasably locking the clamping members in position around the
elongate members.
[0040] It is preferred that the clamping surface is adapted to
conform to at least part of the profile of the exterior of two
elongate members. It is more preferred that both clamping members
are adapted to conform to at least part of the profile of the
exterior of one elongate member. It is most preferred that both
clamping members are adapted to conform to at least part of the
profile of the exterior of two elongate members.
[0041] The clamping members may be pivotally attached to one
another towards one end of the clamping members. The means for
releasably locking the clamping members may comprise a screw and
nut arrangement. The means for releasably locking the clamping
members may comprise a threaded screw whose shank can be inserted
through an aperture in one the clamping members and be rotatably
received in a threaded portion located on or within the opposing
clamping member. It is preferred that where both clamping members
are adapted to conform to at least part of the profile of the
exterior of two elongate members, the means for releasably locking
the clamping members is capable of being located between the two
elongate members when the clamp is in position around them.
[0042] The elongate members may comprise a leg of a trampoline and
an enclosure support member. Preferably, the clamp will be used to
releasably clamp an enclosure support member to the leg of a
trampoline as herein above described.
[0043] In accordance with yet another aspect of the present
invention, there is provided a kit of parts for producing a
foldable trampoline comprising: [0044] a. a trampoline mat; [0045]
b. a frame for suspending a trampoline mat, the frame comprising
tubular sections which are joined together to form two side wings
of the trampoline frame, each wing having a fixed arm extending
from the wing for forming a lever; [0046] c. a pivot for allowing
the two sides of the trampoline frame to pivotally move between a
deployed position where the wings are substantially horizontal, and
a storage position where the wings are brought towards each other;
[0047] d. a support for supporting the frame; [0048] e. a linear
actuator coupled to the arms extending from the wings for
controlling the movement of the wings between the deployed and
storage positions; and [0049] f. suspension means for suspending
the trampoline mat from the frame.
[0050] The kits will preferably be used to produce a foldable
trampoline as herein above described. It will be evident that
commonly, trampolines are delivered in a "flat pack" configuration
where an individual has to assemble the trampoline themselves. It
is preferred that the present invention will be shipped as a "flat
pack" which requires assembly by an individual. Additionally, the
trampoline may be supplied or produced with padding to cover the
frame and a protective cover etc.
[0051] Specific embodiments of the present invention will now be
described, by way of example only, with reference to the
accompanying drawings, in which:
[0052] FIG. 1 is a perspective view of a trampoline embodying the
present invention, in a stowed configuration;
[0053] FIG. 2 is a perspective view of the trampoline in a deployed
configuration;
[0054] FIG. 3a is a side elevation of the trampoline in the stowed
configuration;
[0055] FIG. 3b is an enlarged side elevation of a linear actuator
mechanism employed in the present invention and highlighted with a
circle in FIG. 3a;
[0056] FIG. 4 is side elevation of the linear actuator mechanism
showing stowed (denoted A), deployed (denoted B) and intermediate
(denoted C) configurations;
[0057] FIG. 5a is a perspective view of the trampoline in the
deployed configuration;
[0058] FIG. 5b is an enlarged perspective view of the linear
actuator mechanism employed in the present invention and
highlighted with a circle in FIG. 5a;
[0059] FIG. 6a is an exploded perspective view of the trampoline's
components;
[0060] FIG. 6b is an exploded perspective view of a leg locking
mechanism highlighted with a circle in FIG. 6a;
[0061] FIG. 7a is a perspective view of a second embodiment of a
trampoline in a deployed configuration;
[0062] FIG. 7b is an enlarged perspective view of the linear
actuator mechanism employed in the second embodiment and
highlighted with a circle in FIG. 7a;
[0063] FIG. 8 is an exploded perspective view of the second
embodiment of the trampoline;
[0064] FIG. 9a is an enlarged perspective view of the wing locking
mechanism of the second embodiment;
[0065] FIG. 9b is an enlarged perspective view of the wing locking
mechanism of the second embodiment where the trampoline is locked
in the deployed configuration;
[0066] FIG. 10a is an enlarged perspective view of the wing locking
mechanism of a third embodiment of the trampoline in a stowed
configuration;
[0067] FIG. 10b is an enlarged perspective view of the wing locking
mechanism as shown in FIG. 10a and where the trampoline in a
deployed configuration;
[0068] FIG. 11a is an enlarged perspective view of the wing locking
mechanism of a fourth embodiment of the trampoline in a stowed
configuration;
[0069] FIG. 11b is an enlarged perspective view of the wing locking
mechanism as shown in FIG. 11a and where the trampoline in a
deployed configuration;
[0070] FIG. 12a is a side elevation of the central part of a
trampoline in accordance with a fifth embodiment of the present
invention, with the wings shown in a deployed position;
[0071] FIG. 12b is a side elevation of the central part of the
trampoline shown in FIG. 12a, with the wings shown in a stowed
position;
[0072] FIG. 12c is a side elevation of the central part of the
trampoline shown in FIGS. 12a and 12b, with the wings shown in a
position between the deployed and stowed position;
[0073] FIG. 13a is a side elevation of the opposite side of the
central part of the trampoline shown in FIG. 12a;
[0074] FIG. 13b is a side elevation of the opposite side of the
central part of the trampoline shown in FIG. 12b;
[0075] FIG. 13c is a side elevation of the opposite side of the
central part of the trampoline shown in FIG. 12c;
[0076] FIG. 14a is a side elevation of part of the trampoline of a
sixth embodiment of the present invention, showing the locking
mechanism used to lock the wings in the deployed position;
[0077] FIG. 14b is a side elevation of part of the trampoline shown
in FIG. 14a, showing the wings in a position which is between the
deployed position and the stowed position;
[0078] FIG. 15 is a perspective view of a trampoline in accordance
with a seventh embodiment of the present invention, showing a
trampoline having an enclosure fitted around the frame;
[0079] FIG. 16a is an enlarged side elevation of a leg and
enclosure support of the trampoline shown in FIG. 15, with the
enclosure support shown fitted to the leg;
[0080] FIG. 16b is an enlarged side elevation of the leg and
enclosure support shown in FIG. 16a, with part of the enclosure
support shown as being detached from the support;
[0081] FIG. 16c is an enlarged side elevation of the leg and
enclosure support shown in FIG. 16a, with the leg being detached
from the trampoline frame;
[0082] FIG. 17a is a perspective view of a clamp used to attach an
enclosure support to the leg of a trampoline;
[0083] FIG. 17b is a cross-sectional side view of the clamp as
shown in FIG. 17a; and
[0084] FIG. 17c is a cross-sectional rear view of the clamp as
shown in FIG. 17a.
[0085] FIGS. 1 to 6b show a first embodiment of a foldable
trampoline 10 having a tubular construction. The trampoline 10 has
an octagonal frame 12 with a mat 14 suspended in the frame by means
of a plurality of springs 16. The underside of the frame 12 has a
number of "U" shaped tubular legs 18 attached thereto.
[0086] The frame 12 is also attached to two stands 20 located at
opposing sides of the frame. Each stand 20 is of a generally
rectangular shape with two wheels 22 having foot brakes 24. One of
the stands houses a linear actuator in the form of a worm screw 26,
which is connected by a gearing mechanism to a manual crank 28. The
worm screw 26 is rotatably mounted in bearings 30 located at each
end of the stand. The worm screw 26 has a clockwise threaded region
32 and a counter clockwise threaded region 34. Riding on the
respective threaded regions are clockwise shuttle 36 and a counter
clockwise shuttle 38.
[0087] The frame 12 is divided into a first leaf 40 and a second
leaf 42, each leaf being a tubular component shaped to form part of
an octagon. The frame also has two central portions 48 which form
part of opposing octagonal sides. End regions of each leaf 40,42
are coupled by pivots at axles 44,46 located at either end of the
central portion 48 and the central portion is attached to the stand
20. At the point where the leaves 40,42 pivot about the axles
44,46, first and second downwardly extending arms 50 and 52
protrude from the leaves in a convergent manner at an angle of
approximately 135.degree. with respect to the horizontal plane of
the frame.
[0088] Shuttles 36,38 ride the worm screw 26 and are pivotally
mounted within the first and second arms 50,52. When the crank 28
is turned, it rotates a toothed sprocket 54 which rotates the worm
screw 26 within the bearings 30 and the shuttles 36,38 move across
the worm screw and in doing so actuate movement on the arms 50,52
so as to move the leaves 40,42 between a stowed position as shown
in FIG. 1 and a deployed position as shown in FIG. 2.
[0089] It should be noted that in FIG. 1, the leaves 40,42 are in
an upright position and the wheels are in contact with the ground.
In FIG. 2, the leaves 40,42 are deployed in a horizontal position
and the legs 18 are of a greater height than the stand 20 resulting
in the wheels 22 of the stand being raised off the ground by a
height denoted with "X".
[0090] In FIG. 3a, the trampoline 10 as shown in FIGS. 1 and 2 is
shown in greater detail. In particular, it can be seen that the
frame 12 and legs 18 are made up of different tubular segments
which are joined to one another. Furthermore, FIG. 3a also shows
that when the first and second leaves 40,42 are in the deployed
horizontal position (denoted "B"), the legs 18 extend downwardly
towards the ground. In contrast, when the first and second leaves
40,42 are in the stowed vertical position, the legs 18 are also in
a stowed vertical position. The legs 18 are capable of moving
between both positions relative to the first and second leaves
40,42 when desired and can be locked into place as will be
described later.
[0091] FIG. 3b is a more detailed view of the linear actuator shown
in other Figures. The clockwise and counter clockwise thread 32,34
on the worm screw 26 can clearly be seen, as can the toothed
sprocket 54. When the crank 28 is rotated in a certain direction,
the first and second arms 50,52 are forced away from one another
and results in the first and second leaves 40,42 pivoting about
their respective axles 44,46 and the leaves being brought together
towards the stowed position denoted "A".
[0092] FIG. 4 schematically shows how the first and second leaves
40,42 are deployed and stowed. In particular, FIG. 4 shows that
turning the crank 28 in a clockwise direction 56, results in the
counter clockwise rotation 58 of the worm screw 26 via the toothed
sprocket 54. The counter clockwise rotation of the worm screw 26
moves the first and second arms 50,52 away from each other in
direction 56, resulting in the first and second leaves 40,42 moving
from a horizontal deployed position indicated by "B", to a vertical
stowed position indicated position indicated by "A". An
intermediate position denoted by "C" is also shown with dotted
lines.
[0093] FIG. 5a shows a more detailed perspective view of the
trampoline as previously shown. FIG. 5b shows a detailed
perspective view of the linear actuator as previously
described.
[0094] FIG. 6a shows an exploded perspective view of the trampoline
as previously described. FIG. 6b in particular shows the mechanism
60 which locks the legs in a downward position when the second leaf
44 is in the horizontal deployed position. The leg 18 is formed as
a tubular member which joins the frame 12 by a first and second
connection members 62,64 located within the frame. The connection
members 62,64 are cylindrical and shaped so that they can be
received by the first and second apertures 66,68 apertures formed
at the ends of the tubular leg 18. The connection members 62,64
form a cylindrical collar 70 which can rotate about a cylindrical
part of the frame 72 having a smaller diameter than the diameter of
the collar 70. A spring pin 74 is located within the cylindrical
part of the frame 72 and the pin protrudes through the aperture 76
of the cylindrical part of the frame 72 and an aperture 78 disposed
through the collar 70. The spring pin 74 locks the leg 18 in
position when both apertures 76 and 78 are in alignment. However,
by depressing the pin 74 through the aperture, 78, the collar 70
can be rotated freely about the cylindrical part of the frame
72.
[0095] FIGS. 7a to 9b (which include reference numbers that
correspond to those of FIGS. 1 to 6b) shows a second embodiment
which is similar to the embodiment shown in FIGS. 1 to 6b, but
having a number of minor modifications.
[0096] Firstly, the crank handle 28 is located towards an end of
the worm screw 26 and adjacent to one of the bearings 30. The crank
handle 28 in this embodiment is formed as part of the worm screw,
thus obviating the need for a toothed sprocket 54.
[0097] Secondly, the frame 12 has downwardly extending legs 100
formed form a first limb 102 and a second limb 104 which are joined
together at the base by a joining limb 106. The first limb 102 is
attached to one side of the octagonal frame 12, whilst the second
limb 104 is attached to an adjacent side of the octagonal frame so
as to provide additional stability to the trampoline when in the
deployed configuration. The first and second leg 102,104 can be
attached to the frame 12 when desired, by simply inserting the
respective ends of the legs 103,105 into cylindrical connection
members 108,109 disposed on adjacent sides of the octagonal frame
12.
[0098] Thirdly, as shown in more detail in FIGS. 9a and 9b, a
cylindrical locking collar 110 is provided on the stand 20, whose
internal diameter is slightly larger than the external diameter of
the frame 12. The locking collar 110 is split into a lower part 112
and an upper part 114 and has a hinge 115 which allows the upper
part to pivotally open so as to allow the part of the frame which
forms leaves 40,42 to move from a deployed configuration to a
stowed configuration. The locking collar also has an upper
flattened portion 116 which can be brought into contact with a
lower flattened portion 118 disposed on the lower part 112. The
lower flattened portion 118 has two upstanding threaded screws 120
upon which butterfly nuts 122 can be threaded. The upper flattened
portion 116 has two cut-outs 124 which allow passage of the
threaded screws 120 when the two portions 116,118 are brought into
contact with one another. When the leaves 40,42 are in the stowed
configuration, the upper part and lower part 112,114 can be bought
together so that the lower flattened portion 118 and the upper
flattened portion 116 abut one another. The treaded screws 120 pass
through the cut-outs 124 and the butterfly nuts 122 can be threaded
onto the screws 120 to secure the upper flattened portions and
lower flattened portions 116,118 together so as to lock the leaves
40,42 in the deployed position (as shown in FIG. 9b). If the
trampoline is to be placed in the stowed position, the butterfly
nuts 122 are simply removed so that the upper part 114 can be
rotated about the hinge 115 in direction 126 and out of the way of
the leaves 40,42 (shown in FIG. 9a) so that they can be moved in
direction 128 from the deployed configuration to the stowed
configuration (illustrated by the dotted line 130).
[0099] FIGS. 10a and 10b (which include reference numbers that
correspond to those of earlier Figures) show a third embodiment of
the trampoline having a different arrangement for locking the wings
in the deployed position. In this embodiment, the central portion
48 terminates in a U-shaped channel 150 which receives a
complementary wedge shaped end 152 of a leaf. The U-shaped channel
150 accommodates an axle 44 around which the end 152 can pivot.
Towards the base of the U-shaped channel 150 is a first aperture
154. The end of the leaf 152 also has a second aperture 156, though
which is disposed a treaded bolt 158. When the leaf is rotated
about the axle 44 in direction 160 (so as to assume the position
indicated by dotted line 162), the first and second apertures
154,156 line up and the shank of the bolt 158 can be pushed through
both apertures. A nut 164 can then be treaded onto the shank of the
bolt to secure bolt in place and lock the wing in the deployed
position as shown in FIG. 10b. In order unlock the wing, the nut
164 is simply unscrewed and the threaded bold 158 removed from both
the first and second apertures 154,156.
[0100] FIG. 11a and 11b (which include reference numbers that
correspond to those of Earlier Figures) show a fourth embodiment of
the trampoline having a further variant of the mechanism used for
locking the wings in the deployed position. The mechanism shown is
similar to the one shown in FIGS. 10a and 10b, however, in place of
a bolt, a slidable sleeve 200 is used. When the end of the leaf 152
is rotated about the axle 44 in direction 160 (so as to assume the
position indicated by dotted line 162), the slidable sleeve 200 can
move along plane 202 and in doing so can ride over the outer
surface 204 the end of the central portion 48. When the sleeve 200
is in position over at least part of the outer surface 204, it
prevents the leaf from pivoting about axle 44 and therefore locks
the wings in the deployed position. If required, the interior
diameter of the sleeve 200 may adjustable so that when in position,
the diameter can be restricted to grip the outer surface 204. A
number of ways of adjusting the diameter of the sleeve may be used,
such as a simple hose ring etc. In order to unlock the wing, the
sleeve 200 is simply moved to a position which is clear of the
outer surface 204.
[0101] In use, the trampoline will usually be flat packed for ease
of transportation and due to its tubular construction can be
erected quickly and easily.
[0102] After erection, the trampoline is moved from the deployed
position as shown in FIG. 2 to the stowed position in FIG. 1, by
simply turning the crank 28 in a clock wise direction 56. Before
the crank is turned, the two leaves 40,42 must be unlocked. In the
first embodiment, the leaves are unlocked by pressing a button to
release a lock on the axle 44,46 provided to prevent unwanted
pivoting of the leaves. Alternatively, the lock may be a hook which
requires un-hooking. In the second embodiment, the upper part 116
of the locking collar 110 is moved to the position illustrated in
FIG. 9a. In the third embodiment the bolt 158 is removed from
apertures 156 and 154 as shown in FIG. 10a. In the fourth
embodiment, the sleeve 200 is moved away from the outer surface 204
of the end of the central portion 48 as shown in FIG. 11a.
[0103] When the crank 28 is then turned in a clockwise direction
56, the worm screw 28 is rotated in a counter clockwise rotation 58
via the toothed sprocket 54. In the second embodiment, the worm
screw 28 is rotated without the need of the toothed sprocket. The
counter clockwise rotation of the worm screw 26 exerts a linear
motion to the clockwise and counter clockwise shuttles 36,38 and
this in turn moves the first and second arms 50,52 away from each
other in direction 56, resulting in the first and second leaves
40,42 pivotally moving about axles 44,46 from a horizontal deployed
position indicated by "B", to a vertical stowed position indicated
position indicated by "A", via an intermediate position denoted by
"C".
[0104] When the leaves are in a substantially vertical position,
the wheels engage the floor as the legs 18 are no longer in contact
with the ground and the trampoline frame 12 rests on the stand 20.
In the first embodiment, the legs can then unlocked from their
position (perpendicular to the plane of the leaves), by pressing
the spring pin into the aperture 78 of the collar, so that the pin
is able to ride within the collar 70 and the legs rotate freely
about the frame and resumes a vertical position along side the
vertical leaves. In the second embodiment, the legs 18 can simply
be removed from the frame by removing the ends 103,104 from the
cylindrical connection members 108,109 as an when required. The
leaves 40,42 can then be locked into the vertical position if
required by the locking mechanism.
[0105] A cover can be placed over the stowed trampoline and the
trampoline wheeled to its storage location. If required, the foot
brake 24 can be applied so as to prevent the stand moving.
[0106] The reverse operation of the above described procedure is
used to deploy the trampoline. If the leaves 40,42 have been locked
into position, then the locks will first have to be disengaged so
as to allow movement. In the first embodiment, the legs 18 will
have to be deployed and locked into position by rotating the collar
70 relative to the cylindrical part of the frame 72. When the
spring pin is aligned with both the aperture 76 of the cylindrical
part 72 and the aperture 78 of the collar 70 of the connection
member 62, the leg 18 becomes locked into place at an angle
perpendicular to the frame. In the second embodiment, the ends
103,104 are simply inserted into the cylindrical connection members
108,109 located about frame so that they assume an angle
perpendicular to the frame. The crank can then rotated in a counter
clockwise direction to lower the leaves 40,42 into the deployed
horizontal position.
[0107] Whilst a worm screw is shown as the linear actuator for
moving the trampoline between a deployed and stowed position, other
actuators could also be used. For example, a linear actuator may be
a pulley and ratchet arrangement, a pneumatic piston arrangement or
a hydraulic pump arrangement. It will be evident that should a
pneumatic piston or hydraulic pump arrangements be employed, then
the crank 28 would be replaced by a pump controls and associated
pressure valves. Furthermore, an electric drive system could be
used to power the linear actuator. Such electric drive systems will
be particularly suited to larger trampolines and could be re-fitted
to manually powered variants if necessary.
[0108] A fifth embodiment of the trampoline is shown in FIGS. 12a
to 12c, which differs from trampolines as previously described.
[0109] A trampoline frame rests upon a rectangular support 300
which in turn rests upon wheels 302. The frame has a central
portion 304 which is flanked by a first leaf 306 and a second leaf
308. The first and second leaves 306,308 are pivotally attached to
ends of the central portion by means of axles 310,312. The central
portion 304 rests upon the support 300 by means of struts 315. The
first and second leaves 306,308 have downwardly extending first and
second arms 314,316. When the leaves 306,308 are in the deployed
position (as shown in FIG. 12a), the first and second arms 314,316
extend diagonally from a point adjacent to the axles 310,312,
towards the underside of the central portion 304. First and second
gas springs 318,320 connect the ends of the first and second arms
314,316 to respective bottom corners of the support 300. The gas
springs 318,320 are of the extension type and are configured so as
to exert a force against the arms 314,316 in a direction shown by
the arrow denoted 322. The gas springs 318,320 are attached to the
ends of the arms and corners of the support in such a manner so as
to allow for rotational movement. For example, an end of a gas
spring 318,320 may be attached to either the arm or the support by
means of a ball joint. On the opposing side (shown in FIGS. 13a to
13c) of the trampoline, a similar arm arrangement is formed, except
in place of first and second gas springs 318,320 connecting the
arms to each bottom corner of the support, the two arms are joined
to one another by means of an oil filled damper which facilitates
the controlled movement of the leaves.
[0110] A trampoline mat (not shown) is also attached within the
frame by means of trampoline springs. The tension in the mat
(produced by the trampoline springs and elasticity within the mat)
would make the movement of the first and second leaves 306,308 from
the deployed position (as shown in FIG. 12a) to the stowed position
(shown in FIG. 12b) sudden and rather dangerous, if it were not for
the provision of the first and second gas springs 318,320.
Furthermore, when the leaves are in the stowed position, there is
little or no tension in the mat and the leaves are unstable in this
position. However, the first and second gas springs 318,320
counteract the force exerted upon the leaves by the trampoline mat
(and the weight of the leaves) and permit the leaves to be lowered
and raised in a controlled and safe manner. The first and second
gas springs 318,320 are also capable of holding the first and
second leaves in the stowed position so that they can be locked
together if required.
[0111] In FIG. 12a, the gas springs 318,320 apply a force on the
first and second arms 314,316, causing a clockwise moment (shown by
arrow 324) which results in the first and second leaves 306,308
remaining in the deployed position. The tension of the trampoline
mat springs (not shown) attempt to pull the first and second leaves
306,308 to the stowed position, causing an anticlockwise moment
(shown by arrow 326), however, the force applied by the first and
second gas springs 318,320 is greater than the force applied by the
tension of the trampoline mat springs and the trampoline remains in
the deployed state and the leaves can be safely locked into
position by a suitable locking mechanism (not shown).
[0112] In FIG. 12b, the first and second leaves 306,308 are shown
in the stowed position. The second gas spring 320 applies a force
on the second arms 316, causing an anticlockwise moment (shown by
arrow 326) at the axle 312. The tension from the trampoline mat
springs no longer exists as they are all slack and force applied to
the arms by the gas springs is greater than required to support the
weight of the leaves in this position. The leaves therefore remain
in the stowed position.
[0113] In FIG. 12c, the first and second leaves 306,308 are shown
in a mid point between the deployed and stowed position. The first
and second gas springs 318,320 apply forces to the first and second
arms 314,316, but the forces are in line with the axles 310,312,
the ends of the first and second arms 314,316 and the respective
corners of the frame so no moment occurs. The tension from the
trampoline mat springs is now very low. The force from the gas
springs is in line with axles 310,312 and no moment is exerted by
the first and gas springs 318,320 and the leaves remain in the mid
position until they are moved either towards the deployed or stowed
position.
[0114] It will be apparent that if desired, the gas springs 318,320
could be configured so that when the leaves 306,308 are moved from
the stowed position, the leaves can be left to slowly fall against
the action of the gas springs, until the mid point (where the axles
are in line with the attachment points of the ends of the gas
springs at the end of the arm and the corners of the frame) has
been reached. As the force from the gas springs 318,320 is in line
with the axles 310,312, no moment is exerted by the springs. The
leaves can then be gently pushed down past the mid point and the
action of the springs will assist an individual in drawing the
leaves down to the deployed position and overcome the tension of
trampoline mat.
[0115] FIGS. 13a to 13c show the opposite sides of the central
portion of the trampoline as shown in FIGS. 12a to 12c. An opposite
central portion 330 is shown, to which are attached the first and
second leaves 306,308 by means of axles 336,338. The first and
second leaves 306,308 have downwardly extending third and fourth
arms 332,334 which correspond to the first and second arms 306,308
shown in FIGS. 12a to 12c. When the leaves 306,308 are in the
deployed position (as shown in FIG. 13a), the third and fourth arms
332,334 extend diagonally from a point adjacent to the axles
336,338, towards the underside of the central portion 304. A gas
filled damper 340 is attached between the ends of each arm 332,334.
The gas filled damper 340 is employed to ensure the smooth
controlled movement of the leaves 306,308, when moved between the
deployed and stowed positions.
[0116] In FIG. 13a, the leaves 306,308 are in the deployed position
and the damper 340 is in a compressed configuration. In FIG. 13b,
the leaves 314,316 are in the stowed position and the damper 340 is
in an extended configuration. In FIG. 13c, the leaves 306,308 are
shown in a position mid-point between the deployed and stowed
position and the damper 340 is in a mid-point configuration between
a compressed and extended configuration.
[0117] A sixth embodiment is shown in FIGS. 14a and 14b. The
trampoline has a similar construction as to those previously
described, but differs in the locking mechanism used to lock the
leaves in the deployed position.
[0118] The trampoline frame rests upon a rectangular support 400
which in turn rests upon wheels 402. The frame is formed in a
manner similar to that described in relation to earlier embodiments
and has a cylindrical central portion 404 which is flanked by a
cylindrical first leaf (not shown) and a cylindrical second leaf
408. The second leaf 408 is pivotally attached to the central
portion by means of an axle 412. The central portion 404 is mounted
upon the support 400 by means of struts 415. The central portion
has a protrusion 418 extending from its surface. The leaf 408 also
has a spring loaded button 420 which also extends from its surface.
A collar 422 having a slightly larger interior diameter than both
external diameters of the central portion 404 and the leaf 408 is
also provided. FIG. 14a shows that the collar 422 is located over
the axle 412 and bridges the ends of both the central portion 404
and the leaf 408. In this position, the leaf 408 cannot be rotated
about the pivot and is locked in place. The collar 422 is unable to
move from this position as the protrusion 418 and the button 420
extend sufficiently to hinder the movement of the collar 422.
However, if the spring loaded button 420 is depressed against the
spring 424 located within the interior of the leaf 408, then the
collar 422 is able to ride over the button and move to a position
past the button on the leaf 408 as shown in FIG. 14b. When the
button 420 is released, the collar is prevented from being located
over the axle 412 and the leaf 408 is free to rotate about the axle
412.
[0119] A seventh embodiment is shown in FIGS. 15 and 16a to 16c.
The trampoline 500 shown in FIG. 14 is of a similar general
construction to those described earlier. However it also has an
enclosure 502 made from a net material which surrounds the corners
of the trampoline in an upright manner so as to prevent an
individual from falling from the trampoline when in use. A door 504
is formed in the netting by providing an aperture which can be
opened by unzipping a panel of the netting. The enclosure is formed
from a number of rectangular shaped panels 506 which are supported
at either side by elongated support members 508 which are located
at each corner of the trampoline. The support members 508 have an
upper part 510 and a lower part 512. The lower part 512 terminates
in a rubber stopper 514 and is releasably attached to a leg 516 of
the trampoline 500 by means of clamps 518 (which are shown in more
detail in FIGS. 17a to 17c). The legs 516 of the trampoline are
attached to the frame 520 of the trampoline which accommodates the
trampoline mat 522. The netting is supported from the upper
portions 508 of the support members 508.
[0120] FIG. 16a shows a cylindrical support member 508 which is
attached to the leg 516 of a trampoline. It can also be seen that
spring loaded buttons 522 on the leg 516 extend through an aperture
(not shown) in the leg. Likewise, a spring loaded button 524 can be
seen to extend through an aperture (not shown) in the upper portion
510 of the support member 508.
[0121] FIG. 16, shows the same arrangement as shown in FIG. 16a,
but the upper portion 510 of the support member 508 has been
detached from the lower portion 512 by depressing the spring loaded
button 524 to release the button from the aperture 526 so that the
upper portion can be slid off the end of the lower portion 512. So
as to ensure a snug fit between the upper portion and the lower
portion 510,512, the lower portion 512 has an outer profile 528,
running from its upper end to just past the spring loaded button
524, which is smaller in diameter than the interior of the upper
portion 510.
[0122] FIG. 16c, shows the same arrangement as shown in FIGS. 16a
and 16b, but the upper portion 510 is not present and the leg 516
has been detached from the frame 520. The frame has a downwardly
projecting stub 534 which has an aperture 230 which can receive the
spring loaded button 522 located on the leg 516. The outer profile
532 of the leg 516, running from its upper end to just past the
spring loaded button 524, has a smaller internal diameter than the
interior of the downwardly projecting leg 534.
[0123] FIGS. 17a to 17c show in detail the clamp 518 which is used
to attach the lower part 512 of the support members 508 to a leg
516 of the trampoline 500. The clamp 518 is formed having an upper
clamping member 600 and a lower clamping member 602 which are
substantially similar in shape to one another. The upper and lower
clamping members 600,602 are pivotally attached to one another by
means of a pivot 604 which is located at one end of the clamping
members. The upper and lower clamping members 600,602 are both
formed from pressed steel and each member has two opposing edges
that are bent downwardly so as to form jaw-like structures. The
upper clamping member 600 has a planar outer surface 606 and the
downwardly facing edges are formed with an undulating inner surface
608 which incorporates a first part-circular profile 610 and a
second part-circular profile 612. The first profile 610 forms part
of a circle which is slightly smaller in diameter than that of the
second profile 612. The lower clamping member 602 has similar
features to that of the upper clamping member 600, in that it has a
planar outer surface 614, and the downwardly facing edges are
formed with an undulating inner surface 616 having a first
part-circular profile 618 and a second part-circular profile 620.
The first profile 618 has a profile of part of a circle which is
slightly smaller in diameter than that of the second profile
620.
[0124] When both inner surfaces 608,616 are rotated towards each
other about the pivot 604, the first profiles 610,618 and second
profiles 612,620 define a first space 622 and a second space 624
which can accommodate the exterior of the lower part 512 of a
support member 508 and a leg 516 respectively.
[0125] In order to lock clamp in a certain position, a threaded
bolt 526 is used to connect the upper and lower clamping members
600,602 together. The shank of the threaded bolt 526 is able to
pass through an aperture 628 in the planar outer surface 606, but
the head 630 of the bolt 626 is larger than the aperture and
therefore abuts part of the outer surface 606 surrounding the
aperture. The opposing end of the bolt 626 is receivable in a
threaded portion 632 located through the planer surface 614 of the
lower clamping member 602.
[0126] In order to attach the enclosure 502 to the trampoline, the
spring loaded button 522 of the leg 516 is depressed so that it is
flush with the outer profile 524 of the leg and the end slid into
the interior of the downwardly projecting stub 534. The leg can be
rotated or adjusted so that the spring loaded button 522 protrudes
through the aperture 530 in the frame and locks the leg 516 in
place. As the lower portion 512 is attached to the leg 516, all
that is required to fit the enclosure support member is to slide
the end profile 528 into the interior of the upper portion 510 when
the spring loaded button 524 is depressed. The upper portion 510
can then be rotated or adjusted, so that the spring loaded button
524 protrudes through the aperture 526 in the upper portion and
locks the support 508 in place. The enclosure net 502 can then be
suspended between multiple supports surrounding the trampoline
frame 520 so as to form a complete enclosure. To remove the
enclosure support, the reverse of the above procedure is
undertaken. If required, the support 508 need not be used with the
trampoline and the lower portion 512 can be removed from the legs
by removing the clamps 518. To remove the clamps 518, the threaded
nut 626 is rotated to a position where it is no longer received in
the threaded portion 632. As the upper and lower clamping members
600,602 are no longer locked in position, the members can move away
from each other by rotation about the pivot 604 and the clamp can
be removed from the lower portion 512 of the support and the leg
516. The reverse of the above procedure is used to replace the
clamps 518.
[0127] The aforegoing embodiments are presented by way of example
rather than limitation and numerous possible modifications and
variants will readily present themselves to those skilled in the
art.
* * * * *