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Publication numberUS20040171461 A1
Publication typeApplication
Application numberUS 10/756,182
Publication dateSep 2, 2004
Filing dateJan 13, 2004
Priority dateJan 15, 2003
Publication number10756182, 756182, US 2004/0171461 A1, US 2004/171461 A1, US 20040171461 A1, US 20040171461A1, US 2004171461 A1, US 2004171461A1, US-A1-20040171461, US-A1-2004171461, US2004/0171461A1, US2004/171461A1, US20040171461 A1, US20040171461A1, US2004171461 A1, US2004171461A1
InventorsKeith Alexander
Original AssigneeAlexander Keith Vivian
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Leg structure for a trampoline
US 20040171461 A1
Abstract
A leg structure 40 for a trampoline having a base frame formed from a plurality of interconnectable base sections includes two end sections 42, 44 arranged to support respective adjacent base sections 46, 48, and a central section 54 arranged to support the base sections 46, 48 supported by the end sections at the point of attachment of the base sections. A trampoline support frame has the base frame and a plurality of leg structures 40 supporting joins between respective pairs of adjacent base sections 46, 48. A trampoline has a flexible mat 1, a base frame formed from a plurality of interconnectable base sections 46, 48, a plurality of resiliently flexible rods 2 each having a lower end retained in the base frame and an upper end retained in the flexible mat, and leg structures 40 supporting joins between respective pairs of adjacent base sections 46, 48.
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Claims(26)
1. A leg structure for a trampoline having a base frame formed from a plurality of interconnectable base sections comprising:
two end sections arranged to support respective adjacent base sections; and
a central section arranged to support the base sections supported by the end sections at the point of attachment of the base sections.
2. A leg structure as claimed in claim 1 further comprising a substantially U-shaped frame terminating in the two end sections.
3. A leg structure as claimed in claim 2 wherein the central section comprising a substantially V-shaped supporting brace secured to the U-shaped frame.
4. A leg structure as claimed in claim 1 wherein the end sections are arranged to be secured to the respective base sections.
5. A leg structure as claimed in claim 1 further comprising a cradle mounted on the central section arranged to support the base section.
6. A leg structure for a trampoline comprising:
means for supporting two adjacent base sections of a base frame formed from a plurality of base sections; and
means for supporting the point of attachment of the adjacent base sections.
7. A leg structure for a trampoline as claimed in claim 6 wherein the means for supporting the adjacent base sections is/are arranged to be secured to the base sections.
8. A leg structure for a trampoline as claimed in claim 6 wherein the means for supporting the point of attachment of the adjacent base sections is/are not arranged to be secured to the base sections.
9. A trampoline support frame comprising:
a base frame formed from a plurality of interconnectable base sections; and
a plurality of leg structures supporting joins between respective pairs of adjacent base sections.
10. A trampoline support frame as claimed in claim 9 wherein at least one leg structure further comprises:
two end sections arranged to support respective adjacent base sections; and
a central section arranged to support the base sections supported by the end sections at the point of attachment of the base sections.
11. A trampoline support frame as claimed in claim 10 wherein the end sections of the leg structure are arranged to be secured to the respective base sections.
12. A trampoline support frame as claimed in claim 10 wherein the leg structure further comprises a cradle mounted on the central section arranged to support the base sections.
13. A trampoline support frame as claimed in claim 9 further comprising a plurality of tubular holders arranged to retain the lower ends of respective resiliently flexible rods.
14. A trampoline support frame as claimed in claim 13 wherein adjacent base sections are coupled by an extending tongue portion of one base section engaging into a recess in an adjacent base section.
15. A trampoline support frame as claimed in claim 14 wherein the tubular holders are mounted on the exterior of the base sections.
16. A trampoline support frame as claimed in claim 14 wherein the tubular holders are located at least partly within the base sections.
17. A trampoline support frame as claimed in claim 16 wherein the tongue portion of each base section is provided with a slot arranged to receive at least one of the tubular holders of the adjacent base section.
18. A trampoline comprising:
a flexible mat;
a base frame formed from a plurality of interconnectable base sections;
a plurality of resiliently flexible rods each having a lower end retained in the base frame and an upper end retained in the flexible mat; and
a plurality of leg structures supporting joins between respective pairs of adjacent base sections.
19. A trampoline as claimed in claim 18 wherein at least one leg structure further comprises:
two end sections arranged to support respective adjacent base sections; and
a central section arranged to support the base sections supported by the end sections at the point of attachment of the base sections.
20. A trampoline as claimed in claim 19 wherein the end sections of the leg structure are arranged to be secured to the respective base sections.
21. A trampoline as claimed in claim 19 wherein the leg structure further comprises a cradle mounted on the central section arranged to support the base sections.
22. A trampoline as claimed in claim 18 further comprising a plurality of tubular holders arranged to retain the respective lower ends of the resiliently flexible rods.
23. A trampoline as claimed in claim 22 wherein adjacent base sections are coupled by an extending tongue portion of one base section engaging into a recess in an adjacent base section.
24. A trampoline as claimed in claim 23 wherein the tubular holders are mounted on the exterior of the base sections.
25. A trampoline as claimed in claim 23 wherein the tubular holders are located at least partly within the base sections.
26. A trampoline as claimed in claim 25 wherein the tongue portion of each base section is provided with a slot arranged to receive at least one of the tubular holders of the adjacent base section.
Description
    FIELD OF INVENTION
  • [0001]
    The invention relates to a trampoline for sporting and/or recreational use which is soft-edged relative to conventional trampolines which support the mat of the trampoline via a solid peripheral frame exposed to the springs between the frame and the mat. More particularly, the invention relates to a leg structure for a soft-edged trampoline.
  • BACKGROUND TO INVENTION
  • [0002]
    U.S. Pat. specification No. 6,319,174 discloses a form of soft-edged trampoline in which the mat of the trampoline is supported by a plurality of resiliently flexible rods received in a frame of the trampoline at the lower ends of the rods and coupled to the periphery of the bouncing mat of the trampoline at their upper ends, and which avoids the need for a solid frame about the exterior of the bouncing mat and exposed springs between the frame and periphery of the mat.
  • SUMMARY OF INVENTION
  • [0003]
    The invention provides improved or at least alternative leg structure for a soft-edged trampoline.
  • [0004]
    In this specification (including claims) the term “trampoline” is intended to extend to smaller trampolines commonly referred to as rebounders also, as well as larger trampolines of all sizes.
  • [0005]
    In broad terms in one form the invention comprises the leg structure for a trampoline having a base frame formed from a plurality of interconnectable base sections comprising: two end sections arranged to support respective adjacent base sections; and a central section arranged to support the base sections supported by the end sections at the point of attachment of the base sections.
  • [0006]
    In another form in broad terms the invention comprises the leg structure for a trampoline comprising means for supporting two adjacent base sections of a base frame formed from a plurality of base sections; and means for supporting the point of attachment of the adjacent base sections.
  • [0007]
    In a further form in broad terms the invention comprises a trampoline support frame comprising a base frame formed from a plurality of interconnectable base sections; and a plurality of leg structures supporting joins between respective pairs of adjacent base sections.
  • [0008]
    In another form in broad terms the invention comprises a trampoline comprising a flexible mat; a base frame formed from a plurality of interconnectable base sections; a plurality of resiliently flexible rods each having a lower end retained in the base frame and an upper end retained in the flexible mat; and a plurality of leg structures supporting joins between respective pairs of adjacent base sections.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0009]
    Preferred forms of the leg structure for a trampoline are described with reference to the accompanying drawings by way of example and without intending to be limiting, wherein:
  • [0010]
    [0010]FIG. 1 is a perspective view of one preferred form trampoline;
  • [0011]
    [0011]FIG. 1A is an enlarged view showing the connection of two of the adjacent base sections of the trampoline of FIG. 1;
  • [0012]
    [0012]FIG. 2 shows a base section of a further preferred form trampoline in which the tubular holders are located at least partly within each base section;
  • [0013]
    [0013]FIG. 3 shows a tongue section forming part of the base section of FIG. 2;
  • [0014]
    [0014]FIG. 4 is a perspective view of a further preferred form trampoline; and
  • [0015]
    [0015]FIG. 4A is an enlarged view of the leg structure of the trampoline of FIG. 4.
  • DETAILED DESCRIPTION OF PREFERRED FORMS
  • [0016]
    Referring to FIG. 1, one preferred form trampoline comprises a flexible mat 1 on which users may bounce, a plurality of resiliently flexible rods 2, and a base frame 3. The preferred form trampoline is circular in shape but it will be appreciated that the trampoline could be any other desired shape, such as oval, square, rectangular or similar.
  • [0017]
    The preferred form base frame 3 is in turn formed from a plurality of interconnectable base sections. Each base section is preferably formed from steel, aluminium or other suitable material.
  • [0018]
    [0018]FIG. 1A shows an enlarged version of two of the base sections 4 and 5. Each base section is provided with a tongue portion at one end, for example tongue portion 6 shown on base section 5. Each base section is also provided with a recess, for example recess 7 into which the extending tongue portion of one base section is arranged to engage. As shown in FIG. 1A, the base sections could have a substantially square cross-section and the tongue portion 6 could be of substantially circular cross-section although it will be envisaged that the cross-section of the base section, the recess in the base section and/or the tongue section could be of oval, square, rectangular or similar cross-sections.
  • [0019]
    Each base section is preferably provided with a plurality of tubular holders, for example 8, arranged to retain the lower ends of the flexible rods 2. The tubular holders 8 could be mounted on the exterior of the base sections as shown. It will be appreciated that the holders could be mounted in the base sections such that they are positioned on either the interior or exterior of the assembled trampoline.
  • [0020]
    Rods 2 are typically fibreglass rods but may alternatively be formed of spring steel, for example. The lower ends of the rods are retained in the tubular holders mounted on the exterior of the base sections and the upper ends of the rods are each retained in the flexible mat 1 in a suitable fitting, for example.
  • [0021]
    It will be appreciated that the number of base sections forming the assembled trampoline could be varied but is preferably in the range from 4 to 6.
  • [0022]
    In one preferred form, the base frame 3 could be positioned on the ground or other substantially horizontal surface. Alternatively, the trampoline could include a plurality of leg structures, for example leg 9. As shown in FIG. 1, leg 1 could include a pair of end sections 10 and 11 arranged to support respective adjacent base sections. The end sections of the leg 9 could be secured to the respective base sections and each base section could include sockets arranged to retain respective end sections of the legs.
  • [0023]
    [0023]FIG. 2 illustrates an alternative form base section 20 in which the tubular holders, for example tubular holders 22 and 23, that are arranged to retain the lower ends of the flexible rods, are located at least partly within base section 20. Recess 24 provided in base section 20 that is arranged to receive an extending tongue portion of an adjacent base section could be partially obstructed by the lower end of tubular holder 23.
  • [0024]
    Referring to FIG. 3, the tongue portion 26 of the adjacent base section is formed so as to engage in recess 24. The preferred form tongue 26 is provided with a slot 28 or other suitable aperture. The slot 28 is shaped and positioned so as to receive at least one of the tubular holders of the adjacent base section, for example tubular holder 23. In this way, the tongue portion 26 is able to engage completely within the recess 24 in the adjacent base section.
  • [0025]
    It will be appreciated that the tongue section 26 is shaped and sized so as to engage within recess 24. It will also be appreciated that further configurations of tongue section are possible. For example, the tongue section could be shaped to be positioned to one side only of the tubular holder 23 within recess 24. The base section(s) of FIGS. 2 and 3 are shown as having circular cross-section although it is possible to have other configurations of cross-section.
  • [0026]
    In use, the trampoline is subject to a twisting moment caused by the mat tension positioned above the frame. Connections between the base sections must successfully carry this twisting moment. It is important that the assembled trampoline retain the desired oval, square or rectangular shape regardless of this twisting moment. The use of shorter tongues, or tongues provided with recesses, can result in an assembled frame that is less able to resist the twisting moment caused by the mat tension. Furthermore, the larger the number of interconnectable base sections forming the base frame, the less able the connected base frame is able to resist these forces.
  • [0027]
    [0027]FIG. 4 shows an alternative preferred form leg structure intended to increase the stability of the base frame. The leg 40 includes end sections 42 and 44 that are arranged to support adjacent base sections 46 and 48 respectively of the base frame. Referring to FIG. 4A, each base frame is provided with a tubular socket into which the end section 42 of the leg structure 40 is arranged to locate. Recess 50 could also have an associated fastening component, for example clamp bolt 52 so that end section 42 is secured to base section 46.
  • [0028]
    As shown in both FIGS. 4 and 4A, the leg structure is preferably formed as a substantially U-shaped frame terminating in the end sections 42 and 44. Leg structure 40 also includes central section 54 secured to the U-shaped frame of the leg structure. The central section 54 preferably comprises a substantially V-shaped supporting brace secured to the U-shaped frame.
  • [0029]
    The leg structure 40 may also further comprise a cradle 56 or cup mounted on the central section. In use, the leg structure is positioned and shaped so that the end sections 42 and 44 support respective adjacent base sections and the central section is arranged to support the same base sections at the point of attachment of the base sections. Cradle 56 is positioned in use directly beneath the point of attachment of base sections 46 and 48 for example.
  • [0030]
    Cradle 56 is preferably shaped so as to have an access of curvature similar to the cross-section of the base sections, and is arranged to support the point of attachment of the adjacent base sections in which the cradle 56 is not secured to either of the base sections 46 or 48. The base sections are positioned unsecured on the cradle.
  • [0031]
    Central section 54 prevents or reduces the relative twisting of the base sections by an opposing moment comprising an upward reaction from central structure 54 and a downward reaction resulting from the clamp 52 or other fastening within the leg socket 50. In this way, the moment is effectively converted to tension in the lower member of the leg and compression at the joint between the base sections. This couple is reacted by an equal and opposite couple from the next frame section.
  • [0032]
    The foregoing describes the invention including preferred forms thereof. Alterations and modifications as will be obvious to those skilled in the art are intended to be incorporated within the scope hereof, as defined by the accompanying claims.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2370990 *Jun 4, 1941Mar 6, 1945Nissen George PTumbling device
US2534019 *Apr 5, 1946Dec 12, 1950Griswold Laurence VFoldable frame for trampolins, beds, or the like
US2999558 *Jul 31, 1957Sep 12, 1961Continental Rubber WorksStrap for a tumbling device
US3116809 *Jun 1, 1961Jan 7, 1964Nissen CorpSupporting stand for rebound tumbling apparatus
US3201126 *Jan 30, 1964Aug 17, 1965Nissen CorpGame apparatus with target and trampoline
US4341379 *Jul 25, 1980Jul 27, 1982Milligan Michael RSpotting deck for a trampoline
US4351413 *May 15, 1979Sep 28, 1982Simon Wayne EDeceleration apparatus for safety nets
US6237169 *Oct 18, 1999May 29, 2001Lai Fen YingFoldable trampoline
US6319174 *Oct 26, 2000Nov 20, 2001Keith Vivian AlexanderSoft-edged recreational trampoline
USRE30344 *Apr 4, 1978Jul 22, 1980Temple Baptist ChurchRound trampoline
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7396318May 12, 2005Jul 8, 2008Ca06, LlcSpring arrangement for a recreational structure
US7494444May 12, 2005Feb 24, 2009Ca06, LlcRecreational structure using a sleeve-joint coupling
US7628731Apr 21, 2006Dec 8, 2009Ca06, LlcSpring arrangement for a recreational structure
US7678024 *Jun 26, 2008Mar 16, 2010Board & Batten International Inc.Trampoline
US7927254Dec 15, 2004Apr 19, 2011Cao6, LlcRecreational structure using a sleeve-joint coupling
US8137242Apr 21, 2006Mar 20, 2012Ca06, LlcRecreational structure using a coupling member
US8303469Nov 3, 2008Nov 6, 2012Board & Batten International Inc.Trampoline
US8574132Oct 7, 2011Nov 5, 2013Ca06, LlcTrampoline with sleeve joint coupling
US20060128529 *May 12, 2005Jun 15, 2006Craig AdamsRecreational structure using a sleeve-joint coupling
US20060172861 *Jan 28, 2005Aug 3, 2006Shen-Tai Industry Co., Ltd.Small-size trampoline
US20060258509 *May 12, 2005Nov 16, 2006Craig AdamsSpring arrangement for a recreational structure
US20090005221 *Jun 26, 2008Jan 1, 2009Keith Vivian AlexanderTrampoline
US20090287011 *May 13, 2009Nov 19, 2009Wayne Errol EvansProcess for the preparation of an alkylene carbonate and an alkylene glycol
EP1824571A1 *Dec 8, 2005Aug 29, 2007Board & Batten International Inc.A trampoline
EP1824571A4 *Dec 8, 2005Dec 3, 2008Board & Batten Int IncA trampoline
EP2207602A2 *Nov 3, 2008Jul 21, 2010Board & Batten International Inc.Trampoline and base frame structure
EP2207602A4 *Nov 3, 2008Nov 6, 2013Board & Batten Int IncTrampoline and base frame structure
WO2009061217A2Nov 3, 2008May 14, 2009Board & Batten International IncTrampoline and base frame structure
WO2009061217A3 *Nov 3, 2008Jul 2, 2009Keith Vivian AlexanderTrampoline and base frame structure
Classifications
U.S. Classification482/27
International ClassificationA63B5/11
Cooperative ClassificationA63B5/11, A63B21/026
European ClassificationA63B5/11
Legal Events
DateCodeEventDescription
May 17, 2004ASAssignment
Owner name: BOARD & BATTEN INTERNATIONAL INC., CAYMAN ISLANDS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ALEXANDER, KEITH VIVIAN;REEL/FRAME:015337/0714
Effective date: 20040406