Patent Number: 6,305,674

Title: Spring articulation structure

Abstract: A spring articulation structure particularly for play, fitness training and sports instruments, said structure comprising a core element (1) supported in between two rubber rings (2) and provided with a shaft element (5) fitted in said core element; a shell compactly surrounding the core element and the rubber rings and attached to a bottom plate (9), the top part (3') of said shell being in the middle provided with a aperture (8) with a downwardly narrowing conical surface (7) for the shaft element (5); and a cylindrical element (4) resting on top of the top part (3') of the shell and surrounding the shaft element (5).

Inventors: Koivurova; Markku (Rovaniemi, FI)

Assignee: Lappset Group Oy

International Classification: A63G 31/00 (20060101); A63G 31/14 (20060101); A63G 13/00 (20060101); F16M 001/00 ()

Expiration Date: 10/23/2018