This swivel office chair automatically adjusts to the weight of the user.

By the twisting of the axles, on which the retaining springs are mounted, were earlier susceptible to fatigue fractures between the bellows and mounting eyelets.

A specially developed iglidur® bushing disconnects the retaining spring from the rotary movements of the axles. Thus the required test cycles can be outperformed by many times.

Thomas Michelsen, König + Neurath, Kurben