Patent ID: 6523896
Filing Date: 2003-02-25
Classification: A47C

Abstract:
A chair 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, 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 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 forms a lever arm that extends forward of the third swivelling axis; 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.