Abstract: A chair, in particular an office chair, has a so-called synchronous mechanism in the form of a front seat support member stationary in relation to a chair column and a rear seat support member pivotable about a pivot axle in relation to the front seat support member and bearing a back-rest. A seat supports itself on the two seat support members. A blocking lever of a blocking mechanism and having a stop face is articulated on the rear seat support member at a distance from the pivot axle. This stop face is moved by gravity into engagement with a blocking face stationary in relation to the front seat support member. For releasing this locking, the blocking lever is lifted by a blocking actuator arm.

Abstract: A chair has a chair column on which a front seat support member is fixed. A rear seat support member provided with a back-rest support for a back-rest is joined to the front seat support member by a pivot axle. A seat is supported on the two seat support members. The seat is supported in relation to the rear seat support member by a supporting axle, which is adjustable in height relative to the rear seat support member by a seat pitch adjuster. The seat pitch adjuster can be a retrofit kit.

Abstract: A work box comprises a central box unit and two lateral box units. Each of the box units has a bottom wall, a front end wall, a rear end wall, two opposing lateral side walls, and adjacent surfaces of complementary shape so that when the work-box is closed it forms an essentially solid block. Guide means of the work-box is arranged between the central box unit and the lateral box units, respectively. The bottom wall of the central box unit comprises downwardly inclined slanted wall portions, with the contour of the central box unit essentially corresponding to a triangular prism. The central box unit opens in an upward direction and has a lower edge defined by the slanted wall portions of its bottom wall, which faces in a downward direction. The upper edges of the front end, rear end, and side walls of the lateral box units define a plane that is parallel to the slanted wall portions of the central box unit.