Patent ID: 8282166

Claim:
A chair comprising: a base structure bearing a seat, the base structure including two rear tubular elements open at the top; a backrest having two tubular portions open at the bottom and aligned to said tubular elements of the base structure; and two elastic devices, each of which has a top support inserted in one of the tubular portions of the backrest, a bottom support inserted in the corresponding tubular element of the base structure, and an elastic element having a top stretch fixed to the top support and a bottom stretch fixed to the bottom support, wherein the top support and the bottom support are each formed by a pair of side parts, fixed to one another on opposite sides of the top stretch or of the bottom stretch of the elastic element, the elastic element being flexurally deformable to enable tilting between the top support and the bottom support, each of said elastic devices comprising a plurality of sectors set on top of one another and arranged between the top support and the bottom support, wherein the elastic element has a central stretch extending through said sectors and wherein, in a resting position of the elastic element, a plurality of slits are formed on the rear side of each elastic device between each pair of adjacent sectors.