Lappset Group Oy

Markku Koivurova

A spring articulation structure particularly for play, fitness training and sports instruments, said structure comprising a core element (,) supported in between two rubber rings (,) and provided with a shaft element (,) fitted in said core element; a shell compactly surrounding the core element and the rubber rings and attached to a bottom plate (,), the top part (,&prime;) of said shell being in the middle provided with a aperture (,) with a downwardly narrowing conical surface (,) for the shaft element (,); and a cylindrical element (,) resting on top of the top part (,&prime;) of the shell and surrounding the shaft element (,).

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Rovaniemi, Finland

Markku Koivurova