TILT CHAIR HAVING A FLEXIBLE BACK, ADJUSTABLE ARMRESTS AND ADJUSTABLE SEAT DEPTH, AND METHODS FOR THE USE THEREOF

A tiltable chair including a housing, a back support pivotally attached to the housing about a first horizontal axis and a seat support pivotally attached to the back support about a second horizontal axis and moveably supported by a curved track formed on the housing. A leaf spring includes a first end supported by the housing and a second end biasing the back support and seat support in an upward direction. Preferably, a fulcrum member, which includes a support surface having a curvilinear contour, is moveably supported in the housing and engages a bottom surface of the spring intermediate the first and second ends of the spring. Preferably, a linkage mechanism including a first and second link is adapted to adjust the position of the fulcrum. In another preferred embodiment, a gear housing is removably disposed in said housing and coupled to the fulcrum. In one preferred embodiment, rearward and forward tilt limiters are provided. In various preferred embodiments, the chair further includes a backrest having a plurality of openings, and armrests that are vertically, laterally and pivotally adjustable. In a preferred embodiment, a kit for assembling a seating structure includes a tilt housing having a plurality of connector arrangements comprising at least a first and second connector arrangement, a first seating arrangement having a first mounting arrangement configured to be connected to the first connector arrangement, and a second seating arrangement having a second mounting arrangement configured to be connected to the second connector arrangement. Fauteuil basculant comprenant un logement, un support arrière fixé de manière pivotante au logement autour d'un premier axe horizontal et un support de siège fixé de manière pivotante au support arrière autour d'un second axe horizontal et supporté de manière amovible par une courbe formée dans le logement. Un ressort à lames comprend une première extrémité supportée par le logement et une seconde extrémité poussant le support arrière et le support de siège vers le haut. De préférence, un pivot, qui comprend une surface de support à contour curvilinéaire et est supporté de manière amovible dans le logement, entre en contact avec une surface inférieure du ressort entre les premières et secondes extrémités du ressort. De préférence, un mécanisme de liaison comprenant une première et une seconde liaison est conçu pour régler la position du pivot. Dans un autre mode de réalisation préféré, un logement d'engre