Patent ID: 7195310

Claim:
A chair comprising: a support assembly comprising legs adapted to position on a fixed surface; a backrest having lower ends pivoted to the support assembly whereby the backrest is rotatable with respect to the support assembly to selectively change a tilting angle of the backrest with respect to the support assembly; a slide movably fit over a portion of the support assembly and pivoted to the backrest, the slide further comprising fastening means to selectively secure the slide with respect to the support assembly thereby releasably securing the tilting angle of the backrest with respect to the support assembly; and extendible means connecting between the slide and the portion of the support assembly, to induce a force to the slide with the movement of the slide with respect to the portion of the support assembly; wherein the extendible means comprises a resilient member that induces a tensile force with the movement of the slide from a first position to a second position when the backrest is rotated to change the tilting angle thereof from an original angular position to a destination angular position and wherein the tensile force helps returning the slide from the second position to the first position when the backrest is moved from the destination angular position to the original angular position.