Patent ID: 7331904

Claim:
A trampoline comprising: a trampoline frame; a trampoline mat operatively surrounded by said trampoline frame; and a plurality of trampoline spring members operatively coupled between said trampoline frame and said trampoline mat, each trampoline spring member comprising: a first spring coupler located at a first end of said spring member; a second spring coupler located at a second end of said spring member; a first spring member section coupled to said first spring coupler; a second spring member section coupled to said second spring coupler; at least a third spring member section coupled between said first spring member section and said second spring member section, said third spring member section having a spring constant greater than the spring constants of said first and second spring member sections; wherein the effective spring constant of said spring members increases stepwise with increases in the forces transmitted by trampoline users, and overall spring member deflections are dampened with increases in the forces transmitted by trampoline users.