Patent ID: 6969116

Claim:
A chair having synchronous movement of back and seat assemblies and backward and forward passive tilt capabilities comprising: a chair having a seat assembly, a back assembly and a frame assembly for supporting said seat and said back assemblies; a first link operatively connected to said back assembly, to said frame assembly and to said seat assembly; a first pivot connecting said frame assembly and said first link wherein said first link pivots relative to said frame assembly; a second pivot connecting said first link and said seat assembly wherein said first link pivots relative to said seat assembly, whereby said second pivot is approximately located beneath a chair occupant's hip joint; a second link operatively connected to said frame assembly and to a third link; a third pivot connecting said frame assembly and said second link; said third link operatively connected to said seat assembly and to said second link; a fourth pivot connecting said second link and said third link; and a biasing member mounted to said frame assembly and being deformable; said first pivot is located more rearwardly and upwardly than said second, third and fourth pivots; said second pivot is located more rearwardly and upwardly than said third and fourth pivots; and said third pivot is located more rearward and upwardly than said fourth pivot.