Abstract: The invention is directed to a base for chairs or tables having at least one centrally located column structure. Specifically, the invention is directed to a base composed of several parts, comprising a hub and load-carrying arms radiating therefrom. According to the invention, each arm is separately manufactured and provided with a cavity at least at its proximal end and is individually joined to protrusions on the hub which are inserted into said cavities, and the joint between arms and protrusions is glued.

Abstract: The invention is directed to a base for chairs or tables having at least one centrally located column structure. Specifically, the invention is directed to a base composed of several parts, comprising a hub and load-carrying arms radiating therefrom. According to the invention, each arm is separately manufactured and provided with a cavity at least at its proximal end and is individually joined to protrusions on the hub which are inserted into said cavities, and the joint between arms and protrusions is glued.

Abstract: The invention relates to a hub construction for a rotatable chair, whereby an uncomplicated and robust plain bearing design is provided. The plain bearing parts are manufactured of metal in such a way that the bearing surface on the underlying pin is softer than that of the overlying sleeve. A plain bearing according to the invention may be provided with an adjustable device for obtaining higher friction and thus an increased rotational resistance. In the upper part of the pin is arranged a horizontal bore, into which is fitted a plug shaped body, the ends of which extend outside the mouths of the bore in the bearing surface as an adjusting screw in the upper end of the pin is tightened against the middle section of the plug-shaped body.

Abstract: The invention relates to a hub construction for a rotatable chair, which automatically returns to the initial position when the chair is relieved. In a prior art hub the return force was counteracted mainly by the friction in the hub bearing, which, regardless thereof that the hub was loaded, was not always sufficient for the hub to maintain its rotational position, for example, when the sitting person lifted his feet off the floor. For obtaining higher friction when the hub is loaded, it has been provided with a brake. The brake can preferably be a pair of spring discs which are compressed when the hub is loaded, whereby the brake disc makes contact with the brake surface.

Abstract: The invention is directed to a base for pieces of furniture having at least one supporting column structure. The base comprises a central hub receiving the lower end of a column and a number of arms radiating from the hub. The object of the invention is to provide a furniture base which allows varying its height. This is accomplished by changing the angle between hub and arms, or by shifting the points of attachment of the arms on the hub in the vertical direction.

Abstract: The invention relates to a hub construction for a rotatable chair, which automatically returns to the initial position when the chair is relieved. In a prior art hub the return force was counteracted mainly by the friction in the hub bearing, which, regardless thereof that the hub was loaded, was not always sufficient for the hub to maintain its rotational position, for example, when the sitting person lifted his feet off the floor. For obtaining higher friction when the hub is loaded, it has been provided with a brake. The brake can preferably be a pair of spring discs which are compressed when the hub is loaded, whereby the brake disc makes contact with the brake surface.

Abstract: The invention relates to a hub construction for a rotatable chair, whereby an uncomplicated and robust plain bearing design is provided. The plain bearing parts are manufactured of metal in such a way that the bearing surface on the underlying pin is softer than that of the overlying sleeve. A plain bearing according to the invention may be provided with an adjustable device for obtaining higher friction and thus an increased rotational resistance. In the upper part of the pin is arranged a horizontal bore, into which is fitted a plug shaped body, the ends of which extend outside the mouths of the bore in the bearing surface as an adjusting screw in the upper end of the pin is tightened against the middle section of the plug-shaped body.

Abstract: The invention is related to a hub construction for a rotatable chair, which automatically returns to the initial position when the chair is relieved. The hub construction comprises a vertical shaft (1) fastened to the lower side of the seat of the chair and a hub (2) on the leg portion of the chair, to which hub (2) the lower portion of the shaft (1) is rotatably fastened. The return movement is achieved by means of a cam surface (5) acting in the axial direction and located on the end of a spring loaded sleeve (6) enclosing the shaft (1), which cam surface (5) is arranged to cooperate with a radially directed guide pin (4). The invention is characterized in that the guide pin (4) is fastened to the lower portion of the shaft (3) and that the spring loaded sleeve (6) is mounted torsionally rigidly on the hub (2).

Abstract: The present device is a locking mechanism for a piece of seating furniture that is continuously foldable, comprising a cylindrical bushing (3), which is fixed to the frame of the piece of seating furniture and which is provided with a pair of diagonally arranged holes (4) for an upwards inclined carrier bar (6), which is fixed to the seat part, and comprising a locking member (7) jointly operative with the carrier bar (6) as well as a control member (8) acting upon the locking member (7).