Springfree Trampoline

The design was created by Keith Vivian Alexander, a professor in the Mechanical Engineering Department at the University of Canterbury in Christchurch, New Zealand.

These were: Alexander's goal was to increase the trampoline's safety by re-engineering the spring technology.

In 1999, Alexander released his first prototype utilising glass-reinforced plastic rods, and the first commercial versions began selling in late 2004.

[2] The Springfree trampoline's design includes the use of glass-reinforced plastic rods articulating below the jumping surface, as opposed to the radiating steel spring coils of a Nissen trampoline.

The jumping surface is lowered around 450mm below the jumping surface of a traditional trampoline, and the base's rigidity is derived from a tubular steel assembly with angled supports.