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Chair

  • US 6,523,896 B1
  • Filed: 07/05/2000
  • Issued: 02/25/2003
  • Est. Priority Date: 07/06/1999
  • Status: Expired due to Fees
First Claim
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1. 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.

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