Abstract: A chair provided with a seat and a back rest, said seat (1) having a general saddle shape, a saddle-like member (2,3 ) projecting out from a mid part of each longitudinal side of said saddle shaped seat to support the rear, upper thigh portion of a chair user. The back rest (4) has a comparatively narrow, upwardly directed mid portion (5), and two branches (6, 7) projecting laterally therefrom, and intended to be used for elbow and/or forearm support. The chair can be used for sitting posture in both directions, i.e. facing away from or facing the back rest. In either of these sitting postures, the chair occupant can assume a sitting posture with a large open angle between the upper part of the body and the thigh section, the sitting posture then approaching that of a kneeling-like sitting posture.

Abstract: A sitting device with a seat, the inclination of which may be altered relative to a floor, supporting means along being arranged below and substantially in front of said seat for the knee or calf leg portions of the user, the supporting means being arranged at the front portion of the frame of the device in the form of two cushions spaced apart to provide a free space from the front and in towards the seat, and the seat being fixedly connected to the frame, said frame being provided with substantially curved runners to contact the floor and said supporting means being arranged at the front ends of the runners. The runners may at a middle portion thereof have a bend to define a transition between sections of the runners. The sitting device may have a back rest. Instead of a fixedly connected seat and runners, the seat may be hinged connected to the frame and forwardly tiltable.

Abstract: An adjustable chair includes a pair of upwardly extending spaced uprights having a plurality of horizontal grooves provided along the substantial length thereof at inner surfaces of the uprights and facing each other, a foot rest plate and a seat bottom plate member having opposite ends respectively disposed in opposite ones of the grooves at desired vertical locations along the uprights. The foot rest and the seat bottom are interchangeable and are tightly held in place by fastening means extending between the uprights.