Patent ID: 7862479

Claim:
A trampoline, comprising: a first frame assembly, the first frame assembly including a base frame member; a first connecting member pivotably connected approximately at a first end of the base frame member and a second connecting member pivotably connected approximately at a second end of the base frame member; a center post positioned between the first connecting member and the second connecting member and coupled to the base frame member at a first end; a center bracket slidably engaged to the center post; a first peripheral frame member pivotably connected to the first connecting member and a second peripheral frame member pivotably connected to the second connecting member wherein both first and second connecting frame members are connected to the center bracket; a supporting bracket coupled to a second end of the center post, the supporting bracket having a horizontally-oriented protrusion projecting inwardly relative to the trampoline and an opening; a crank shaft rotationally coupled to the second end of the center post, the crank shaft having a first gear portion; an elongated threaded member passing through the opening of the support bracket and rotatably coupled to the center bracket while extending along the center post, the elongated threaded member having a second gear portion in rotational connection with the first gear portion, wherein upon rotational force being applied to the elongated member via the crank shaft, the elongated threaded member rotates to cause the first and second peripheral frame members to collapse into one another or expand away from one another; at least two arcuate frame members connected to the first and second peripheral frame members and defining a circle in an expanded state; and a resilient web attached to the frame assembly by a plurality of springs.