Importance

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Abstract

A chair is provided comprising a seating platform having a front edge and a back edge, a seat carrier that carries the seating platform and is connected to one of a central chair column and a plurality of chair legs, a rest carrier that proceeds toward the back under the seating platform and upward behind the seating platform, and a backrest carried on the rest carrier. The seating platform, close to its front edge, is hinged to the seat carrier pivotable around a transversely proceeding, first swivelling axis and, offset therefrom toward the back edge, is hinged to the rest carrier pivotable around a parallel, second swivelling axis. The rest carrier is hinged to the seat carrier pivotable around a third swivelling axis that is located between the first and second swivelling axis and parallel thereto. A spring is provided under the seating platform and supported thereat which exerts a pre-stress force acting upwardly on the seating platform and toward the front on the back rest. The rest carrier comprises an extension that extends forward of the third swivelling axis and forms a lever arm. The spring has its end remote from the seating platform supported on the rest carrier extension and the seating platform comprises a vertical motion latitude relative to at least one of the seat carrier and the rest carrier.

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First Claim