CA1128085A - Round trampoline with u-shaped leg - Google Patents
Round trampoline with u-shaped legInfo
- Publication number
- CA1128085A CA1128085A CA320,755A CA320755A CA1128085A CA 1128085 A CA1128085 A CA 1128085A CA 320755 A CA320755 A CA 320755A CA 1128085 A CA1128085 A CA 1128085A
- Authority
- CA
- Canada
- Prior art keywords
- mat
- frame
- frame rail
- sections
- shaped leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B5/00—Apparatus for jumping
- A63B5/11—Trampolines
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/02—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices using resilient force-resisters
- A63B21/023—Wound springs
Abstract
ABSTRACT OF THE DISCLOSURE
A round trampoline having a sectional, circular frame combined with a circular mat of lesser diameter than the frame resiliently supported from the frame by a plurality of radially arranged coil springs. A
plurality of U-shaped legs support the frame with each U-shaped leg being of rigid, one-piece construction and rigidly connected to the frame in bridging relation to the joints in the segments of the frame to prevent relative rotation between the segments and eliminate bending of the frame at the joints. The mat includes a pair of intersecting and over-lapping strips oriented in perpendicular relation to each other to form a reinforced center jumping area with the portions of the mat externally of the intersecting portions being of mesh material to enable passage of air in order to prevent ballooning of the mat and to eliminate the feeling of being air supported when contacting the mat.
A round trampoline having a sectional, circular frame combined with a circular mat of lesser diameter than the frame resiliently supported from the frame by a plurality of radially arranged coil springs. A
plurality of U-shaped legs support the frame with each U-shaped leg being of rigid, one-piece construction and rigidly connected to the frame in bridging relation to the joints in the segments of the frame to prevent relative rotation between the segments and eliminate bending of the frame at the joints. The mat includes a pair of intersecting and over-lapping strips oriented in perpendicular relation to each other to form a reinforced center jumping area with the portions of the mat externally of the intersecting portions being of mesh material to enable passage of air in order to prevent ballooning of the mat and to eliminate the feeling of being air supported when contacting the mat.
Description
11;28~85 The present inventlon generally relates to a round trampoline and more particularly a trampoline of this type in which the circular frame forming the trampoline is sectional and provided with U-shaped supporting legs bridging the joints between the sections with the U-shaped legs being free of and not connected with adjacent legs or other legs on the frame with the circular frame supporting a mat having a central double thickness or reinforced area and a peripheral area of mesh material enabling air passage therethrough.
My prior U.S. Patent No. 3,948,575, issued to the present patentee on April 6, 1976, discloses a circular trampoline of the type disclosed herein. The references of record in that patent disclosure various trampoline structures and while prior trampolines have functioned successfully, improvements of the structural characteristics thereof are desirable in order to overcome certain problems relating to the strength of the frame especially in the joints between adjacent segments of the frame and in the mat which tends to balloon or provide a "squooshy" feeling when constructed of air impervious material throughout its area.
In general, the present invention provides a substantially round trampoline comprising a sectional, substan-tially annular frame including a frame rail formed by a plurality of sections and means for joining the ends of adjacent sections. U-shaped legs bridge the joint between adjacent sections with each leg including upper ends secured to the sections of the frame rail in spaced relation to the joint between adjacent sections of the frame rail thereby preventing relative rotation between adjacent sections of the frame rail and preventing bending of the frame rail.
These and other features of the invention will become more apparent from the following description wherein reference ws/~
' llZ~3~85 is made to the appended drawings in which:
Figure 1 is a perspective view showing the round trampoline of the present invention.
Figure 2 is a detailed elevational vlew of one of the U-shaped legs and the associated joint between adjacent sections of the frame.
Figure 3 is a fragmental plan view of a portion of the frame and periphery of the mat.
Figure 4 is a detailed sectional view illustrating the pad associated with the trampoline.
Referring now to the drawings, the trampoline of the present invention is generally designated by reference numeral 10 which includes a sectional, substantially circular frame 12 provided with U-shaped ws/~ ~
1~2~ 8S
supporting legs 14 which support the frame 12 on a suitable support surface S. A substantially circular mat 16 is resiliently mounted within frame 12 by a plurality of coiled springs 18. The springs 18 are placed radially around the frame 12 which distributes the weight of a person jumping on the trampoline evenly to all of the springs 18 with resultant longer spring life. This arrangement also provides forces which tend to retain the jumper in the center of the mat 16 thus providing better body control and less chance of injury which some-times can occur when a person using a trampoline jumps to the side edge portion thereof and engages the frame or possibly the ground surface.
Mat 16 includes a pair of strips 22 and 24 each having ends thereof curved to the same radius and being arranged in perpendicular relation to provide a double thickness center jumping area with the intersecting portions of the mat being stitched at 28 and 30 so that the jumping area 26 is reinforced. A backing ring 31 reinforces the perimeter of the mat and is stitched to the strips 22 and 24 by stitching 32 and filler pieces 33 of vinyl covered nylong are stitched to the ring 31 and strips 22 and 24. A plurality of straps 34 are secured to the ring 31 and a conventional D-ring 36 is arranged for receiving a hook end of springs 18. The other hook end of the springs 18 i9 arranged in a respective hole 38 provided in rail 40 of frame 12.
The mat material is preferably of woven polypropylene or similar material with the material being of mesh construction so that those areas which are of single thickness, such as all of the areas externally of the central jumping area 26 will enable air passage therethrough.
This reduces the ballooning effect or air support of the mat during use thereby eliminating the soft or "squooshy" feeling which occurs when the entire mat is of air impervious material.
As illustrated in Fig. 2, the frame rail 40 is in the form 3 ~28~P85 of sections with the joint 42 between adjacent sections being connected by a connecting plug 44 rigidly secured to one of the sections of the frame rail 40 and telescoped into the other of the sections. In spaced relation to the joint 42, the frame rail 40 is provided with a depending tubular sleeve 46 fixed thereto such as by welding or the like in perpendicular depending relation.
The sleeves 46 are parallel to each other and equally spaced from the joint 42 between adjacent sections of the frame rail 40.
A U-shaped supporting leg 48 rigidly connects the frame sections and supports the frame. The U-shaped leg 48 is of one-piece construction and includes a horizontally disposed bottom or bight portion 50 and upwardly inclined and diverging legs 52 each of which terminates in a vertical upwardly extending upper end portion 54 that is telescoped into a depending sleeve 46 thereby bridglng the joint 42 and preventing relative rotation of the adjacent sections of the frame 40 due to the telescopic engagement between the upper ends 54 of the legs and the sleeves 46. This prevention of rotation prevents bendin8 of the frame and rigidly connects adjacent sections of the frame rail 40 into a rigid continuous truss-like frame structure peripherally of the mat w;th the entire area enclosed by the frame being free of connecting braces or other components so that only the bight portions 50 of the plurality of U-shaped supporting legs 48 form supporting means for the trampoline.
While the telescopic engagement between the upper ends of the legs 48 and the sleeves 46 provides a rigid connection, the jamming of the lower ends of the sleeves 46 around the curved portion of the legs 52 where the ends 54 are formed serves to retain the legs assembled when lifting the trampo~ine such as when moving it from one area to another.
While the dimensional characteristics of the trampoline may vary, an 1128~85 overall diameter of approximately 13 1/2 feet has been found satisfactory with 100 springs 18 being employed. Frame pads 56 are provided over the springs 18 and the frame rail 40 as illustrated in Fig. 4 with the pads 56 being preferably in the form of a hollow enclosure formed by any suitable waterproof material such as vinyl material or the like filled with a resilient material such as foam rubber, foam plastic or other cushioning material to completely eliminate the possibility of injury due to persons using the trampoline coming into contact with the frame rail, springs or associated components. The pad 56 has a depending padded skirt 58 around the frame rail 40 which retains the pad in place and protects against contact with the rail during use of the trampoline.
My prior U.S. Patent No. 3,948,575, issued to the present patentee on April 6, 1976, discloses a circular trampoline of the type disclosed herein. The references of record in that patent disclosure various trampoline structures and while prior trampolines have functioned successfully, improvements of the structural characteristics thereof are desirable in order to overcome certain problems relating to the strength of the frame especially in the joints between adjacent segments of the frame and in the mat which tends to balloon or provide a "squooshy" feeling when constructed of air impervious material throughout its area.
In general, the present invention provides a substantially round trampoline comprising a sectional, substan-tially annular frame including a frame rail formed by a plurality of sections and means for joining the ends of adjacent sections. U-shaped legs bridge the joint between adjacent sections with each leg including upper ends secured to the sections of the frame rail in spaced relation to the joint between adjacent sections of the frame rail thereby preventing relative rotation between adjacent sections of the frame rail and preventing bending of the frame rail.
These and other features of the invention will become more apparent from the following description wherein reference ws/~
' llZ~3~85 is made to the appended drawings in which:
Figure 1 is a perspective view showing the round trampoline of the present invention.
Figure 2 is a detailed elevational vlew of one of the U-shaped legs and the associated joint between adjacent sections of the frame.
Figure 3 is a fragmental plan view of a portion of the frame and periphery of the mat.
Figure 4 is a detailed sectional view illustrating the pad associated with the trampoline.
Referring now to the drawings, the trampoline of the present invention is generally designated by reference numeral 10 which includes a sectional, substantially circular frame 12 provided with U-shaped ws/~ ~
1~2~ 8S
supporting legs 14 which support the frame 12 on a suitable support surface S. A substantially circular mat 16 is resiliently mounted within frame 12 by a plurality of coiled springs 18. The springs 18 are placed radially around the frame 12 which distributes the weight of a person jumping on the trampoline evenly to all of the springs 18 with resultant longer spring life. This arrangement also provides forces which tend to retain the jumper in the center of the mat 16 thus providing better body control and less chance of injury which some-times can occur when a person using a trampoline jumps to the side edge portion thereof and engages the frame or possibly the ground surface.
Mat 16 includes a pair of strips 22 and 24 each having ends thereof curved to the same radius and being arranged in perpendicular relation to provide a double thickness center jumping area with the intersecting portions of the mat being stitched at 28 and 30 so that the jumping area 26 is reinforced. A backing ring 31 reinforces the perimeter of the mat and is stitched to the strips 22 and 24 by stitching 32 and filler pieces 33 of vinyl covered nylong are stitched to the ring 31 and strips 22 and 24. A plurality of straps 34 are secured to the ring 31 and a conventional D-ring 36 is arranged for receiving a hook end of springs 18. The other hook end of the springs 18 i9 arranged in a respective hole 38 provided in rail 40 of frame 12.
The mat material is preferably of woven polypropylene or similar material with the material being of mesh construction so that those areas which are of single thickness, such as all of the areas externally of the central jumping area 26 will enable air passage therethrough.
This reduces the ballooning effect or air support of the mat during use thereby eliminating the soft or "squooshy" feeling which occurs when the entire mat is of air impervious material.
As illustrated in Fig. 2, the frame rail 40 is in the form 3 ~28~P85 of sections with the joint 42 between adjacent sections being connected by a connecting plug 44 rigidly secured to one of the sections of the frame rail 40 and telescoped into the other of the sections. In spaced relation to the joint 42, the frame rail 40 is provided with a depending tubular sleeve 46 fixed thereto such as by welding or the like in perpendicular depending relation.
The sleeves 46 are parallel to each other and equally spaced from the joint 42 between adjacent sections of the frame rail 40.
A U-shaped supporting leg 48 rigidly connects the frame sections and supports the frame. The U-shaped leg 48 is of one-piece construction and includes a horizontally disposed bottom or bight portion 50 and upwardly inclined and diverging legs 52 each of which terminates in a vertical upwardly extending upper end portion 54 that is telescoped into a depending sleeve 46 thereby bridglng the joint 42 and preventing relative rotation of the adjacent sections of the frame 40 due to the telescopic engagement between the upper ends 54 of the legs and the sleeves 46. This prevention of rotation prevents bendin8 of the frame and rigidly connects adjacent sections of the frame rail 40 into a rigid continuous truss-like frame structure peripherally of the mat w;th the entire area enclosed by the frame being free of connecting braces or other components so that only the bight portions 50 of the plurality of U-shaped supporting legs 48 form supporting means for the trampoline.
While the telescopic engagement between the upper ends of the legs 48 and the sleeves 46 provides a rigid connection, the jamming of the lower ends of the sleeves 46 around the curved portion of the legs 52 where the ends 54 are formed serves to retain the legs assembled when lifting the trampo~ine such as when moving it from one area to another.
While the dimensional characteristics of the trampoline may vary, an 1128~85 overall diameter of approximately 13 1/2 feet has been found satisfactory with 100 springs 18 being employed. Frame pads 56 are provided over the springs 18 and the frame rail 40 as illustrated in Fig. 4 with the pads 56 being preferably in the form of a hollow enclosure formed by any suitable waterproof material such as vinyl material or the like filled with a resilient material such as foam rubber, foam plastic or other cushioning material to completely eliminate the possibility of injury due to persons using the trampoline coming into contact with the frame rail, springs or associated components. The pad 56 has a depending padded skirt 58 around the frame rail 40 which retains the pad in place and protects against contact with the rail during use of the trampoline.
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A substantially round trampoline comprising a sectional, substantially annular frame including a frame rail formed by a plurality of sections, means joining the ends of adjacent sections, a U-shaped leg bridging the joint between adjacent sections with the U-shaped leg including upper ends secured to the sections of the frame rail in spaced relation to the joint between adjacent sections of the frame rail thereby preventing relative rotation between adjacent sections of the frame rail and preventing bending of the frame rail.
2. The structure as defined in claim 1 wherein each frame rail section includes a depending member rigid therewith disposed in adjacent but spaced relation to each end of the frame rail section, each U-shaped leg including substantially vertical upper ends telescoped in relation to the depending members on the frame rail sections for rigidifying the frame rail sections and leg and preventing rotation of the frame rail sections with the U-shaped leg bridging the joint between adjacent sections and being of one-piece construction and forming the sole support for the trampoline.
3. The structure as defined in claim 1 together with a mat supported within said annular frame, said mat being substantially concentric with respect to the frame, a plurality of radial springs of equal length and equally spaced circumferen-tially between the mat and frame, said mat being constructed of a dual thickness central jumping area, the portion of the mat exteriorly of the central jumping area being of mesh construction to enable passage of air therethrough to prevent ballooning of the mat and eliminate the soft or "squooshy" feeling caused by air support of the mat during use.
4. The structure as defined in claim 2 together with a mat supported within said annular frame, said mat being substantially concentric with respect to the frame, a plurality of radial springs of equal length and equally spaced circum-ferentially between the mat and frame, said mat being constructed of a dual thickness central jumping area, the portion of the mat exteriorly of the central jumping area being of mesh construction to enable passage of air therethrough to prevent ballooning of the mat and eliminate the soft or "squooshy" feeling caused by air support of the mat during use.
5. The structure as defined in claim 4 wherein said springs exert an inward force on said frame rail to retain the sections in assembled relation, said U-shaped leg engaging adjacent sections of the frame rail preventing outward expansion of the frame rail.
6. The structure as defined in claim 5 together with a peripheral cushioning pad overlying the frame rail and extending radially inwardly to cover a substantial portion of said springs, said pad including a depending padded skirt extending downwardly around the outside of the frame rail a short vertical distance to retain the pad in position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA320,755A CA1128085A (en) | 1979-02-02 | 1979-02-02 | Round trampoline with u-shaped leg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA320,755A CA1128085A (en) | 1979-02-02 | 1979-02-02 | Round trampoline with u-shaped leg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1128085A true CA1128085A (en) | 1982-07-20 |
Family
ID=4113446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA320,755A Expired CA1128085A (en) | 1979-02-02 | 1979-02-02 | Round trampoline with u-shaped leg |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1128085A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4900011A (en) * | 1986-12-30 | 1990-02-13 | Leopold Nolet | Exerciser and playpen structure having a trampoline like bottom |
-
1979
- 1979-02-02 CA CA320,755A patent/CA1128085A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4900011A (en) * | 1986-12-30 | 1990-02-13 | Leopold Nolet | Exerciser and playpen structure having a trampoline like bottom |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |