Abstract: The chair, particularly an office chair, has a backrest articulated to a seat support by way of a rest support. A seat surface is movable synchronously with the backrest. A front region of the seat surface is connected to the seat support via a sliding guide and a rear region is connected to the seat support via a seat link. A distance from an upper pivot point, which connects the seat link to the seat surface, to the backrest is shorter than the distance from a lower pivot point, which connects the seat link to the seat support, to the backrest. The movements of the backrest and of the seat surface are synchronized by a sliding guide provided between the seat link and the rest support.

Abstract: A chair, in particular an office chair, is described. The chair has a backrest that is inclinable with regards to a seat carrier via a backrest carrier. The chair has a seat surface that can be moved synchronously with the backrest and is supported on the seat carrier via at least one seat link. A coupling link is provided for synchronization between the movement of the backrest and the movement of the seat surface. The coupling link is connected rotatably, on one side to the seat surface and, on another side, to the backrest link.

Abstract: A chair, in particular an office chair, has a backrest that is articulated on a seat carrier via a backrest carrier, and has a seat surface that can be moved synchronously with the backrest. The front region of the seat surface is connected to the seat carrier via a sliding guide. The rear region of the seat surface is connected to the seat carrier via a seat link. A top point of rotation connects the seat link to the seat surface. A bottom point of rotation connects the seat link to the seat carrier. The distance between the top point of rotation and the backrest is smaller than the distance between the bottom point of rotation and the backrest. A sliding guide for the seat surface is provided in the backrest carrier for synchronizing the movement of the backrest and the movement of the seat surface.

Abstract: A chair, in particular an office chair, is described. The chair has a backrest that is inclinable with regards to a seat carrier via a backrest carrier. The chair has a seat surface that can be moved synchronously with the backrest and is supported on the seat carrier via at least one seat link. A coupling link is provided for synchronization between the movement of the backrest and the movement of the seat surface. The coupling link is connected rotatably, on one side to the seat surface and, on another side, to the backrest link.

Abstract: A spring unit (11) for the weight setting of a chair (1), in particular an office chair, having a gas spring (12) and having a number of further spring elements (17, 18, 19; 27, 28) which can be connected up to the gas spring (12) individually or in combination. The spring unit (11) is expediently arranged between a seat carrier (7) connected to a rotary column (8) of the chair (1), and the seat (3), or a backrest link (4) which extends at least approximately parallel to said seat (3) and belongs to a backrest (2).

Abstract: A footrest is fastened via a telescopically extendable connecting element to an office chair, in particular to an office chair having a backrest that can be tilted into a rest position. This results in an especially comfortable and ergonomic seating position, and in particular a situation in which the office chair is pushed away from the footrest when the footrest is not needed.

Abstract: A chair (1, 1′), in particular an office chair, having a backrest (6) which is arranged such that it can be rotated about a first point of rotation (8) in relation to a seat carrier (2) and which can be inclined from a rest position, and having a seat surface (10) which is connected to the backrest (6) such that it can be rotated about a second point of rotation (12) and which can be inclined synchronously with the backrest, is intended, in particular in terms of its tendency to tilt, also to be suitable for a particularly pronounced inclination movement of the backrest (6) with an inclination of, for example, up to 40° in relation to the starting position of the same. For this purpose, according to the invention, in the rest position, the first point of rotation (8) is positioned at approximately the same height as, or higher than, the second point of rotation (12).

Abstract: A chair, in particular an office chair, has a backrest that is articulated on a seat carrier via a backrest carrier, and has a seat surface that can be moved synchronously with the backrest. The front region of the seat surface is connected to the seat carrier via a sliding guide. The rear region of the seat surface is connected to the seat carrier via a seat link. A top point of rotation connects the seat link to the seat surface. A bottom point of rotation connects the seat link to the seat carrier. The distance between the top point of rotation and the backrest is smaller than the distance between the bottom point of rotation and the backrest. A sliding guide for the seat surface is provided in the backrest carrier for synchronizing the movement of the backrest and the movement of the seat surface.

Abstract: The chair, particularly an office chair, has a backrest articulated to a seat support by way of a rest support. A seat surface is movable synchronously with the backrest. A front region of the seat surface is connected to the seat support via a sliding guide and a rear region is connected to the seat support via a seat link. A distance from an upper pivot point, which connects the seat link to the seat surface, to the backrest is shorter than the distance from a lower pivot point, which connects the seat link to the seat support, to the backrest. The movements of the backrest and of the seat surface are synchronized by a sliding guide provided between the seat link and the rest support.

Abstract: A footrest is fastened via a telescopically extendable connecting element to an office chair, in particular to an office chair having a backrest that can be tilted into a rest position. This results in an especially comfortable and ergonomic seating position, and in particular a situation in which the office chair is pushed away from the footrest when the footrest is not needed.

Abstract: A longitudinal adjusting element has a housing (1) which is filled with a pressurizing medium and in which a piston (12) including a piston rod (16) is guided displaceably. The housing chambers (13,14) which are separated from each other by the piston (12) can be connected with each other or separated from each other with the assistance of a valve device (17). The valve device (17) has at least two overflow ducts (16,40) [sic. (26,40)] which have different throttling effects and which take effect jointly or successively while valve pin (29) is slid in to varying extents.