Abstract: A chair with a frame with tubular elements, which comprises two inverted V-shaped elements that form the front legs and rear legs, are parallel and are joined substantially at their inner curvature to a rod-like crossmember, two L-shaped elements connected by the crossmember on which they are arranged in a parallel configuration so as to form a support for the back and for the seat, respectively with first substantially vertical portions thereof and second substantially horizontal portions.

Abstract: An antipanic table, particularly for a conference room chair, the antipanic table comprising a flat supporting body and a joint that is embedded at least partially in the flat body and has two movement units: a unit for tilting the flat body from a substantially horizontal arrangement to a substantially vertical arrangement and vice versa about a tilting axis that coincides substantially with the longitudinal axis of an armrest of the chair to which the antipanic table is adapted to be applied, a unit for the rotation of the flat body about a rotation axis that is perpendicular thereto.

Abstract: A metallic frame for chairs with tubular elements, comprising two inverted V-shaped elements that form the legs of a chair, which are parallel and joined substantially at their inside curvature to a rod-like crossmember, two L-shaped elements connected by the crossmember on which they are arranged in a parallel configuration so as to form a support for the back and for the seat, respectively with their first portions, which are substantially vertical, and second portions, which are substantially horizontal.

Abstract: A chair with a frame with tubular elements, which comprises two inverted V-shaped elements that form the front legs and rear legs, are parallel and are joined substantially at their inner curvature to a rod-like crossmember, two L-shaped elements connected by the crossmember on which they are arranged in a parallel configuration so as to form a support for the back and for the seat, respectively with first substantially vertical portions thereof and second substantially horizontal portions. The chair is provided with means for locking vertical stacking with similar chairs.

Abstract: A device for adjusting the height of a back-rest of a seat back portion, in particular in office chairs, comprising a guide element rigid with a support plate of a seating portion, a slide for supporting the back-rest, the slide being engagable with the guide element and slidable along it, and means which are elastically selectively engageable with a toothed portion to ensure the stability of the position of the slide relative to said guide.The elastic means are able to slide freely along the passive flanks of teeth of a toothed portion during the raising of the back rest, and are locked by the active flanks after each passage over a tooth.