Abstract: A coupling device for a recreational structure comprises a first arm member and a second arm member. The first arm member comprises first and second ends that are arranged substantially in a plane. The first end comprises an external surface that is capable of receiving an internal surface of a first horizontal frame member of the recreational structure and the second end comprising either an external surface that is capable of receiving one of an internal surface of a second horizontal frame member of the recreational structure or an internal surface that is capable of receiving an external surface of the second horizontal frame member of the recreational structure. The second arm member is arranged along a longitudinal axis and is capable of receiving a vertical frame member of the recreational structure.

Abstract: A spring arrangement for a trampoline includes a rebounding surface, a frame structure having a top portion and a bottom portion, and a plurality of spring members that are mechanically coupled between the rebounding surface and the frame structure. A first group of spring members are mechanically coupled to the top portion of the frame structure and a second group of spring members are mechanically coupled to the bottom portion of the frame structure. In one exemplary embodiment, the spring members of the first group and the second group are alternately arranged along the frame structure. In another exemplary embodiment, the frame structure is formed by a plurality of frame members.

Abstract: A frame structure for a safety enclosure for a recreational structure includes at least one substantially rigid horizontal support member, at least one vertical pole member having a top end, a substantially vertical portion and portion that is not substantially vertical, and at least one end cap member. The end cap member mates with the top end of the vertical pole member and releasably receiving a horizontal support member. In one exemplary embodiment, the vertical pole member can be part of a safety enclosure. In another exemplary embodiment, at least one horizontal support member is flexibly rigid. One exemplary embodiment provides a netting-type material that is attached to one of a horizontal support member and an end cap member, such that the netting-type material forms a substantially cylindrical shaped safety enclosure space.