Abstract: A head and/or neck support for a chair, in particular for an office chair, includes a device for adjusting the swivel and height, with which the support may be moved relative to a back rest of the chair, a first receptacle for a head and/or neck cushion, and a second receptacle for fastening the support to the back rest, the support being rotatably held at one end on the second receptacle via two first swivel arms and on the other end, the first swivel arms being connected in a rotatable and swivelable manner to two second swivel arms which hold the first receptacle at the end which is opposite the swivel arms which are hingedly connected to one another.

Abstract: A chair, in particular an office chair, has: a chair column, a seat holder secured to said chair column, and a backrest, wherein an adjusting mechanism is provided with which the backrest can be inclined relative to the vertical, wherein the adjusting mechanism includes an upward-arching curved guide, which is rigidly joined to the seat holder and on which a holder element that supports the backrest is movable along an upward-arching curved path for adjusting an inclination of the backrest, wherein the seat holder is inclined to a horizontal via an adjusting device secured to the chair column, and wherein the adjusting device includes a supporting arm, secured to the chair column, on which arm the seat holder is mounted pivotably via a joint with a horizontal pivot axis.

Abstract: A seating furniture item, in particular an office chair, has a seat fastened on a seat support and a backrest fastened to a backrest support, the backrest support being articulatedly arranged on a base support and the backrest support and the seat support being articulatedly connected with each other via two levers, and in which one of the two levers is positively guided directly on the base support.

Abstract: A head and/or neck support for a chair, in particular for an office chair, includes a device for adjusting the swivel and height, with which the support may be moved relative to a back rest of the chair, a first receptacle for a head and/or neck cushion, and a second receptacle for fastening the support to the back rest, the support being rotatably held at one end on the second receptacle via two first swivel arms and on the other end, the first swivel arms being connected in a rotatable and swivelable manner to two second swivel arms which hold the first receptacle at the end which is opposite the swivel arms which are hingedly connected to one another.

Abstract: A chair, in particular an office chair, has: a chair column, a seat holder secured to said chair column, and a backrest, wherein an adjusting mechanism is provided with which the backrest can be inclined relative to the vertical, wherein the adjusting mechanism includes an upward-arching curved guide, which is rigidly joined to the seat holder and on which a holder element that supports the backrest is movable along an upward-arching curved path for adjusting an inclination of the backrest, wherein the seat holder is inclined to a horizontal via an adjusting device secured to the chair column, and wherein the adjusting device includes a supporting arm, secured to the chair column, on which arm the seat holder is mounted pivotably via a joint with a horizontal pivot axis.

Abstract: A chair has a seat, a center column, a seat support bar joined to the center column, and a mechanism provided for securing the seat with adjustable inclination to the seat support bar and including a toggle lever assembly.

Abstract: A seating furniture item, in particular an office chair, has a seat fastened on a seat support and a backrest fastened to a backrest support, the backrest support being articulatedly arranged on a base support and the backrest support and the seat support being articulatedly connected with each other via two levers, and in which one of the two levers is positively guided directly on the base support.

Abstract: A chair has a chair body, a rest, an adjusting mechanism for adjusting a height of the rest and including a securing element solidly connected to the chair body and having a free end with a slot, a threaded bolt extending through the slot and screwable into a thread in the rest, and a hand wheel to which the threaded bolt is rigidly connected, so that securing of the rest to the end portion of the securing element in clamping fashion is effected, a clamping sleeve has a throughbore through which the threaded bolt reaches in an assembled state and an end face with diameter greater than a width of the slot, a plurality of detent elements lockingly engageable by the end face of the clamping sleeve, wherein the clamping sleeve or the detent recesses have at least one oblique face, and a pressure-generating device builds up a pressure force between the hand wheel and the clamping sleeve and has at least one force component parallel to the longitudinal axis of the clamping sleeve.

Abstract: A chair has a seat, a center column, a seat support bar joined to the center column, and a mechanism provided for securing the seat with adjustable inclination to the seat support bar and including a toggle lever assembly.

Abstract: A chair, in particular an office chair, having a chair column (1), a seat holder (2) secured to it, and a backrest (3), an adjusting mechanism being provided with which the backrest can be inclined relative to the vertical, is characterized in that the adjusting mechanism includes an upward-arching curved guide (4), which is rigidly joined to the seat holder (2) and on which a holder element (5) that supports the backrest is movable along an upward-arching curved path for adjusting the inclination of the backrest. As a result, the radius of the pivot axis can be selected as substantially greater, and a considerably gentler adjustment of the backrest and a much more accurate approach to the desired final position are made possible.

Abstract: A device for adjusting a seat depth of a chair has a seat carrier, an adjusting part which is arranged pullable out on a front edge of the seat carrier, a spindle rotatably supported in the adjusting part, two nuts arranged on the spindle so that during a rotation of the spindle they move on the spindle in opposite directions, and two braces hingedly supported on the seat carrier and connected with the nuts.

Abstract: A device for adjusting a seat depth of a chair has a seat carrier, an adjusting part which is arranged pullable out on a front edge of the seat carrier, a spindle rotatably supported in the adjusting part, two nuts arranged on the spindle so that during a rotation of the spindle they move on the spindle in opposite directions, and two braces hingedly supported on the seat carrier and connected with the nuts.

Abstract: A chair has a seat surface having a front region which is turned downwardly and is pullable rearwardly under the seat surface for reducing a seat depth.

Abstract: A back for a chair has a frame, and a material piece which is held on the frame, the frame being composed of at least two frame pieces which are connectable with one another.

Abstract: In a gas pressure spring for a chair, a locking device is provided, which includes a safety sleeve formed of two semi-circular halves which are clamped on an outer tube of the gas pressure spring by clamping bolts. The outer tube is formed with an end portion of a reduced diameter and a transition zone. The two halves of the safety sleeve are formed each with an inner collar matching the transition zone of the outer tube. One of the halves is formed with a through opening for passing a height-adjusting lever towards the outer tube.