Abstract: The invention relates to an item of seating furniture comprising a seat, a column, a base, a spring device for cushioning the up and down movement of the seat and a pendulum device for inducing a pendular response of the column by means of the seat, and a device for automatically adjusting the pendular return force in accordance with the weight of a person occupying the seat

Abstract: An office chair has a seating element with an upright tubular element (3) and a base, the seating element being connected to the base by means of the support element (1) so as to be swiveled and reset. Rubber buffers (19, 24) are provided between a connecting element (2) of the base, ring discs (11) and (17) and a tubular element (8) extending from the seating element downward and allow an oscillating movement of the seating element. The rubber buffers at least partially enclose the connecting element (2), thereby retaining the same. A pneumatic spring (4) allows to adjust the height of the seat. A thumb screw (16) allows to adjust the restoring force by compressing the rubber buffers (19, 24) to a greater or lesser extent.

Abstract: The disclosure relates to a chair comprising a seat part, at least one leg part, at least one foot part that consists of a predetermined plurality of foot elements and at least one spring assembly. According to the disclosure, at least one designated foot element and/or a sub-section of said element is configured to be mobile and is subject to a restoring moment under the action of a load.

Abstract: The invention relates to a chair comprising a seat part (2), at least one one leg part (3), at least one foot part (5) that consists of a predetermined plurality of foot elements (4) and at least one spring assembly (6). According to the invention, at least one designated foot element (4) and/or a sub-section (4?) of said element is configured to be mobile and is subject to a resotring moment under the action of a load.

Abstract: The invention concerns a floor construction comprising a plurality of surface portions (12) which each comprise at least one respective material with possibly different properties, in particular properties in regard to human perception when standing on the surface portions (12), wherein the different surface portions (12) are of such an arrangement and configuration that when moving on the floor construction (10) a continuously changing, unforeseeable sequence of different surface portions (12) has to be unavoidably stepped upon.