Rebounding apparatus with tensioned elastic cords
A trampoline with a frame has a rebounding mat that is tensioned to the frame with a plurality of flexible and cordlike linear elastic members. Preferably each cordlike elastic member is connected to the frame and the rebounding mat at one of two alternative positions to alter the tension. The alternative positions permit a tensioning process that extends the lifetime of elastic cords having a fabric sheath. This independent tension of each elastic member is via connector member that grips the rebounding mat but also grasps opposing the ends of the elastic members as well as central portion thereof so that two segment of the cord between each end and the central portion are preferably wrapped around the trampoline frame.
1. A trampoline comprising:
a horizontally extending frame that defines a central opening;
a jumping surface comprising a mat that is connected to the frame and that is suspended within the opening; and
a plurality of legs supporting the frame,
wherein at least one of the legs extends outwardly of the frame as viewed from the top, and
wherein the at least one of the legs has
an upper portion that is disposed below the frame, which upper portion has an upper end attached to the frame, a lower end located at an elevation below the upper end, and which upper portion does not touch the ground when the trampoline is in use with the legs resting on the ground,
a lower portion that is attached to the upper portion, which lower portion touches the ground when the trampoline is in use with the legs resting on the ground and extends outside the perimeter of the frame as viewed from the top, and
a lower region of the lower portion that extends substantially vertically.
2. The trampoline of claim 1 wherein the horizontal extending frame is round as viewed from the top.
3. The trampoline of claim 1 wherein the lower portion of each of the legs has an upper region that extends horizontally outward from the outwardly facing side surface, the lower region that extends substantially vertically, and a curved middle region that extends between the upper and lower regions.
4. The trampoline of claim 3 where each curved middle region is substantially a quarter of a circle.
5. A stack of trampolines comprising plural trampolines according to claim 1 stacked vertically, one on top of the other, in nesting fashion, with the legs of successive trampolines not being in vertical alignment.
6. The stack of claim 5 wherein a leg connected to one trampoline may be offset and adjacent to the leg of another sacked trampoline in either of two opposing directions around the frame perimeters.
7. The trampoline of claim 1 wherein:
the frame has a side surface, and the upper end is attached to at least a portion of the side surface of the frame.
8. A trampoline comprising:
a horizontally extending frame that defines a central opening;
a jumping surface comprising a mat that is connected to the frame and that is suspended within the opening; and
a plurality of equal length legs supporting the frame,
wherein at least one of the legs extends outwardly of the frame as viewed from the top, and
wherein the at least one outwardly-extending leg has a lower portion that descends substantially vertically toward the ground.
9. The trampoline of claim 8 wherein the horizontal extending frame is round as viewed from the top.
10. A stack of trampolines comprising plural trampolines according to claim 8 stacked vertically, one on top of the other, in nesting fashion, with the legs of successive trampolines not being in vertical alignment.
11. The stack of claim 10 wherein a leg connected to one trampoline may be offset and adjacent to the leg of another sacked trampoline in either of two opposing directions around the frame perimeters.
12. The trampoline of claim 8 wherein a majority of the legs extend outwardly of the frame as viewed from the top, and
wherein the outwardly-extending legs have a lower portion that descends substantially vertically toward the ground.
13. The trampoline of claim 8 wherein the at least one outwardly-extending leg has a curved upper portion.
14. The trampoline of claim 8 wherein at least half of the legs extend outwardly of the frame as viewed from the top, and the outwardly-extending legs have a curved upper portion and a lower portion of the same leg that descends substantially vertically toward the ground.