Patent attributes
A chair includes a support assembly comprised of a first leg set having two space first bars and a second leg set having two space second bars located between and pivoted to the first bars. A backrest has is rotatable with respect to the support assembly to selectively change a tilting angle thereof. A tubular slide is movably fit over a free end of each first bar and is pivoted to the backrest. The slide has a fastening device to selectively secure the slide with respect to the first bar thereby releasably securing the backrest at a desired tilting angle. A wire and a spring are selectively connected between the slide and the first bar to prevent the slide from undesired separation from the first bar and to induce a returning force to move the backrest from a tilted position back to a regular position.
