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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 ...
Keith Vivian Alexander is a New Zealand mechanical engineer and inventor. He is a professor of mechanical engineering at the University of Canterbury, in Christchurch, [1] and the inventor of the springfree trampoline.
Parts books were often issued as microfiche, though this has fallen out of favour. Now, many manufacturers offer this information digitally in an electronic parts catalogue. This can be locally installed software, or a centrally hosted web application. Usually, an electronic parts catalogue enables the user to virtually disassemble the product ...
JumpSport, Inc. is a manufacturer of recreational trampolines and accessories that are distributed worldwide. JumpSport markets and sells a patented trampoline safety net enclosure which was invented by one of the company's founders, Mark Publicover .
Helical coil springs designed for tension A heavy-duty coil spring designed for compression and tension The English longbow – a simple but very powerful spring made of yew, measuring 2 m (6 ft 7 in) long, with a 470 N (105 lbf) draw weight, with each limb functionally a cantilever spring.
Nissen set up a manufacturing plant for his company in England in 1956 headed up by Ted Blake an English trampoline pioneer, first in Hainault then Romford and finally Brentwood, Essex by the mid-1960s, and manufactured trampolines there for many years. Brentwood still has a thriving trampolining community but no longer a local factory.