Patent ID: 8070230

Claim:
A chair comprising: at least two seat carriers, each further comprising an upper arched guide and a lower arched guide; at least two back rest carriers, each further comprising a restrictedly guided region; a back rest arranged on the back rest carriers, wherein the restrictedly guided region of the back rest carriers is respectively guided between the upper arched guide and the lower arched guide of the corresponding seat carriers, thus allowing the back rest carriers to be inclined relative to the seat carriers, wherein the upper arched guide and the lower arched guide are embodied at least in certain regions as an arc of a circle portion and wherein the arc of a circle portion of the upper arched guide and the arc of a circle portion of the lower arched guide have the same centre of a circle; a base carrier; at least one pull spring lever which is articulated to the seat carrier by means of a rear seat coupling shaft; at least two coupling levers which are articulated to the seat carrier by means of a front seat coupling shaft, wherein the at least one pull spring lever is articulated by means of a main shaft and the at least two coupling levers are articulated to the base carrier by means of a base coupling shaft; at least two pull rods which are arranged in an articulated manner on the at least one back rest carrier and at least two pull levers which are arranged on the main shaft and which are each articulated to the at least two pull rods.