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EP0540711B1 - Siege de travail, notamment siege de bureau - Google Patents

Siege de travail, notamment siege de bureau Download PDF

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Publication number
EP0540711B1
EP0540711B1 EP92910163A EP92910163A EP0540711B1 EP 0540711 B1 EP0540711 B1 EP 0540711B1 EP 92910163 A EP92910163 A EP 92910163A EP 92910163 A EP92910163 A EP 92910163A EP 0540711 B1 EP0540711 B1 EP 0540711B1
Authority
EP
European Patent Office
Prior art keywords
seat
work chair
chair according
pivot
backrest
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92910163A
Other languages
German (de)
English (en)
Other versions
EP0540711A1 (fr
Inventor
Peter Tobler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EQUUS MARKETING AG
Original Assignee
EQUUS MARKETING AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EQUUS MARKETING AG filed Critical EQUUS MARKETING AG
Publication of EP0540711A1 publication Critical patent/EP0540711A1/fr
Application granted granted Critical
Publication of EP0540711B1 publication Critical patent/EP0540711B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers

Definitions

  • the invention relates to a work chair, in particular an office chair, with a seat support, a seat which can be pivoted in front on the seat support about an axis of rotation and is also approximately horizontally movable relative to the seat support, a backrest support which is articulated by means of an axis of rotation on the seat support and which has a pivot axis with the Seat is connected and a backrest which is coupled to the backrest support.
  • pivoting the backrest in one direction causes the seat to pivot in the same direction.
  • the pivoting of the seat is usually only half as large as the pivoting of the backrest (US-A-2 859 799, CH-A-629 945).
  • These work chairs have five disadvantages in particular, namely a physiologically unnatural movement when pivoting the backrest, a negative influence on the sitting posture, lack of weight neutrality, a relatively complex construction and a bulky appearance that no longer meets today's aesthetic needs.
  • There are certain correlations between these disadvantages Missing e.g. the weight neutrality and the spring force of a compensation device, which counteracts the force on the backrest, which causes the weight of the user, is poorly adjusted, this can also contribute to poor sitting posture, as will be explained in more detail later.
  • a lever is sufficient to raise the backrest. This releases the springs that were tensioned backwards when swiveling.
  • the backrest and seat then return to the original position or to an intermediate position desired by the user. If the user slipped a little when swiveling backwards, his pelvis is now in a sloping position to the rear. He has a bad posture that can easily lead to back pain.
  • the energy used to swivel the backrest is largely stored in the springs in the work chair of CH-A-629 945 and is released when a locking device is released in order to move the backrest and upper body of the chair user forward again. If the user leaves the chair without moving the backrest forward and is e.g. the locking device is released by cleaning personnel, the backrest swings forward with great force and speed. This poses a significant risk of injury.
  • US-A-4,834,454 describes a chair in which a seat on the front of the seat support is pivotable about an axis of rotation.
  • An L-shaped backrest support can be pivoted about a pivot axis arranged on the seat support.
  • the L-shaped backrest support is connected to the seat at the end of the horizontal bar of the L by means of a pivot axis. If the backrest is pivoted backwards, the backrest support, which is firmly connected to the backrest, lifts the rear part of the seat. At the same time, the seat is pushed back a little.
  • a work chair with a synchronous mechanism is to be created in which the user's body performs physiologically natural movements.
  • the movement sequence should also lead to a good sitting posture.
  • the construction of the chair should be simple. But it should also meet the highest possible aesthetic requirements that are placed on work chairs, especially office chairs.
  • the invention also has the advantage of a particularly simple construction, which also allows an aesthetically particularly appealing design of the work chair. In practice, only one lever is required, namely the backrest support.
  • the angle of inclination of the plane in which the axis of rotation of the backrest support and the articulation axis of the backrest support are located on the seat is advantageously in the range from 60 to 70 degrees. Tests have shown that the chair is perceived by the user as particularly comfortable at such an angle of inclination. With this angle of inclination there is also a movement sequence of the seat and backrest which does not lead to a shirt pull-out effect.
  • the distance between the axis of rotation and the articulation axis is advantageously approximately 80 to 120 mm, preferably approximately 100 mm. This results in favorable conditions for a weight balance and an optimal way for backward movement of the seat when the backrest is pivoted backwards.
  • the backrest is expediently articulated to the backrest support. This enables a favorable movement of the backrest.
  • the backrest is designed as a pendulum backrest, the lordosis, i.e. the physiological curvature of the spine of the chair user to the front, intensified.
  • the spring element which strives to move the backrest and the seat forward, advantageously has a relatively steep characteristic, so that the spring force increases with increasing inclination of the backrest and thus counteracts the force on the backrest caused by the weight of the upper body of the chair user.
  • the articulation axis is expediently located in the region of the rear half of the seat. This arrangement results in favorable conditions for weight compensation.
  • the front of the seat can be stored in different ways. So it is possible that the front seat is connected to the seat support by means of a flexible connecting piece.
  • An expedient embodiment provides a connection via a support lever.
  • This support lever is advantageously arranged approximately vertically in the front position of the backrest. The result of this is that when the backrest is pivoted backwards, the front part of the seat is slightly lowered. This slightly reduces the pressure on the body in the area of the hollow of the knee, which contributes to the desired relaxation of the body and promotes blood circulation.
  • the seat it is also possible for the seat to be connected at the front to the seat support by means of a sliding piece running in a guide. This results in a simple construction.
  • the spring element is advantageously an elastomer block.
  • Elastomer blocks which are known under the name "cell volcano”, also have movement-damping properties. This prevents the backrest from rapidly advancing.
  • An elastomer block or a coil spring are advantageous because, in contrast to a gas spring, they have a relatively steep spring characteristic. The restoring force exerted by the elastomer block or the mechanical spring at the start of a backward movement of the backrest is therefore low. Thanks to the mechanism according to the invention, there is extensive force compensation in this area between the force acting on the seat and the force acting on the backrest.
  • the seat and backrest can be made from a single flexible part, e.g. Plastic part. It is also possible that the seat shell and backrest shell are made from a single part, e.g. Plastic part exist, which has an articulated section. Such constructions are made possible by the arrangement according to the invention of the axis of rotation of the backrest support and of the articulation axis which connects the backrest support to the seat, because in this arrangement an undesired movement between the seat and backrest, which would lead to a shirt pull-out effect, is avoided.
  • a clamping device for example a lamella clamping device, advantageously serves to lock the seat and the backrest in the desired position. Since the seat in the design of the work chair according to the invention has a relatively large travel path when the backrest moves, a locking device acting on the seat only has to absorb relatively small forces, so that a clamping device can be used for locking instead of the usual gas spring. Such clamping devices are cheap to manufacture and, in contrast to gas springs, also do not have any disposal problems.
  • the seat is advantageously strongly shaped, i.e. with depressions corresponding to the contours of the human body. This counteracts the risk of slipping even when the seat is inclined relatively strongly.
  • the arrangement of the axis of rotation, the articulation axis and the articulation point is expediently such that, in the normal position, the angle of inclination of the seat to the rear is approximately 3 degrees and includes an angle of approximately 103 degrees with the plane in which the articulation axis and the articulation point of the backrest lie , and that when the backrest support is pivoted about 34 degrees backward, the seat is pivoted upward about 5 degrees.
  • This configuration has proven to be very practical ergonomically.
  • the seat support 11 is carried in the usual manner by a base with a standpipe 13 and a height lift. Of these parts, only the standpipe 13 is indicated in the drawing.
  • the seat 15 is advantageously strongly shaped, that is to say has a recess 16 at the rear, which counteracts slipping forward. Padding 18 can also be provided in the usual way.
  • the backrest 29 can also have padding 30.
  • the seat 15 is in the region of its front end on the seat support 11 e.g. supported by a support lever 17.
  • the support lever 17 has an articulated connection 19 with the seat support 11 and an articulated connection 21 with the seat 15.
  • the support of the seat 15 on the seat support 11 could also be carried out, for example, by means of a flexible connecting piece made of elastomeric material.
  • the chair also has a backrest support 25 which is articulated to the seat support 11 with an axis of rotation 23.
  • This backrest support 25 is a two-armed lever.
  • One arm 27 of the two-armed lever is coupled to the backrest 29, which is designed as a pendulum backrest.
  • the other arm 31 of the two-armed lever 25 is coupled to the seat 15.
  • the arm 27 is coupled approximately in the middle or somewhat below the center of the backrest 29, e.g. by means of a joint 33.
  • the other arm 31 is coupled in the area of the rear half of the seat 15 via the articulation axis 35. There is a distance of about half the seat length or slightly more, e.g. two thirds of the seat length.
  • the position of the articulation axis 35 with respect to the axis of rotation 23 is of particular importance.
  • the articulation axis 35 is located at a location which lies in front of and above the axis of rotation 23. It is important that in the normal sitting position, ie with the backrest 29 in a practically vertical position, the angle of inclination of the plane 36 in which the two axes 23, 35 lie is in the range from 45 to 80 degrees, advantageously 60 to 70 degrees. From this area, when the backrest 29 is pivoted backwards, the articulation axis 35 moves in the direction of the arrow 45. This requires a relatively small force necessary.
  • the seat 15 is also moved relatively strongly to the rear.
  • the distance between the axes 23 and 35 is approximately 80 to 120 mm, advantageously approximately 100 mm. This results in favorable conditions for weight compensation.
  • the spring element 39 On the two-armed lever 25 there is a nose 37, to which a spring element 39 engages. This spring element 39 tends to move the backrest 29 forward, i.e. to put them back in their normal sitting position.
  • the spring element 39 is advantageously a coil spring, e.g. a compression spring which is guided by a telescopic device 41.
  • an elastomer block e.g. from "Zellvulkolan", find use.
  • a locking device 42 with an actuating lever 44 is shown schematically.
  • a simple clamping device e.g. Slat clamping device, serve. Because, as mentioned in the introduction, there is a weight balance and the seat has a relatively long travel path, only relatively small forces have to be absorbed when locking, so that a clamping device is sufficient.
  • FIGS. 3 and 4 clearly show that the backrest follows the upper body faithfully and that the shirt is therefore not removed.
  • the exemplary embodiment according to FIGS. 3 and 4 differs from the previously described exemplary embodiment essentially by the other support of the seat 15 on the seat support 11 and the different arrangement of the spring 39.
  • This can e.g. be a rod 22 which is supported by the tabs 24 of the seat 15.
  • the spring element 39 e.g. an elastomer block ("cell volcano") is arranged practically parallel to the seat 15 and is supported at one end at 26 on the seat support 11 in order to act on the seat 15 at the other end.
  • the spring element 39 transmits its force via the rod 22 and the tabs 24 to the seat 15 and strives to move the seat 15 forward into the position of FIG. 3.
  • the backrest support 25 can be given various shapes. A possible variant is shown in Fig. 3a. The possibility of connecting the axes 23, 35 and 33 in different ways gives the designer many options for a pleasant design of the work chair. For example, a backrest support 25 can be provided on each side, the two backrest supports being connected to one another by the hinge axis 23. An extension 46 can also serve as an armrest (FIG. 3a).
  • the exemplary embodiment according to FIGS. 5 and 6 differs from that of FIGS. 3 and 4 essentially in that the rear part of the seat 15 and the lower part Part of the backrest (29 to 28) are hinged together.
  • the seat shell and backrest shell can thus consist of a single elastic part, for example a plastic part, or a single part which has an articulated section 28.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
  • Plural Heterocyclic Compounds (AREA)

Claims (21)

  1. Chaise de travail, en particulier chaise de bureau, comprenant un support de siège (11), un siège (15), qui peut pivoter, à l'avant, sur le support de siège autour d'un axe (21) et qui est en outre mobile approximativement horizontalement par rapport au support de siège (11), un support de dossier (25), qui est articulé sur le support de siège au moyen d'un axe d'articulation (23) et qui est réalisé sous la forme d'un levier à deux bras, dont un bras (31) est relié au siège (15) par un axe d'articulation (35), un dossier (29), qui est accouplé au support de dossier (25), l'axe d'articulation (35) étant disposé en avant de l'axe d'articulation (23) et plus haut que celui-ci, caractérisée en ce que l'angle d'inclinaison du plan (36), dans lequel se trouve les deux axes (35, 23) est dans la fourchette de 45 à 80 degrés par rapport à l'horizontal, lorsque le dossier (29) se trouve dans la position avant.
  2. Chaise de travail selon la revendication 1, caractérisée en ce que l'angle d'inclinaison est dans la fourchette de 60 à 70 degrés.
  3. Chaise de travail selon la revendication 1 ou 2, caractérisée en ce que la distance entre l'axe d'articulation (23) et l'axe d'articulation (35) s'élève à environ 80 à 120 mm, de préférence 100 mm.
  4. Chaise de travail selon l'une quelconque des revendications 1 à 3, caractérisée en ce que le dossier (29) est relié de manière articulée au support de dossier (25) en un point d'articulation (33).
  5. Chaise de travail selon l'une quelconque des revendications 1 à 4, caractérisée en ce que le point d'articulation (33) du dossier (29) est disposé derrière l'axe d'articulation (23) dans un angle de 10 à 20 degrés, de préférence 15 degrés, par rapport à la verticale passant par l'axe d'articulation (23).
  6. Chaise de travail selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'il est prévu un élément à ressort (39), qui sollicite le dossier (29) vers l'avant.
  7. Chaise de travail selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'axe d'articulation (35) se trouve dans la région de la moitié arrière du siège (15).
  8. Chaise de travail selon l'une quelconque des revendications 1 à 7, caractérisée en ce que le dossier (29) est un dossier oscillant.
  9. Chaise de travail selon l'une quelconque des revendications 1 à 8, caractérisée en ce que le siège (15) est relié, à l'avant, au support de siège (11) au moyen d'une pièce de liaison flexible.
  10. Chaise de travail selon l'une quelconque des revendications 1 à 8, caractérisée en ce que le siège (15) est relié de manière articulée au support de siège (11) par un levier d'appui (17).
  11. Chaise de travail selon la revendication 10, caractérisée en ce que le levier d'appui (17) est disposé à peu près verticalement dans la position normale du dossier (29).
  12. Chaise de travail selon l'une quelconque des revendications 1 à 11, caractérisée en ce que le siège (15) est relié, à l'avant, au support de siège (11) au moyen d'une pièce coulissante (22) qui courre dans une coulisse (20).
  13. Chaise de travail selon l'une quelconque des revendications 6 à 12, caractérisée en ce que l'élément à ressort (39) est un bloc d'élastomère.
  14. Chaise de travail selon l'une quelconque des revendications 6 à 13, caractérisée en ce que l'élément à ressort (39) est un ressort à boudin.
  15. Chaise de travail selon la revendication 10, caractérisée en ce que l'élément à ressort (39) est accroché au support de dossier (25).
  16. Chaise de travail selon la revendication 10, caractérisée en ce que l'élément à ressort (39) est disposé pratiquement parallèlement au siège (15) et est accroché à celui-ci.
  17. Chaise de travail selon l'une quelconque des revendications 1 à 16, caractérisée en ce que le siège (15) et le dossier (29) se composent d'une seule pièce élastique à la flexion, par exemple une pièce en matière synthétique.
  18. Chaise de travail selon l'une quelconque des revendications 1 à 16, caractérisée en ce que le siège (15) et le dossier (29) se composent d'une seule pièce, par exemple une pièce en matière synthétique, qui présente une partie souple (28).
  19. Chaise de travail selon l'une quelconque des revendications 1 à 18, caractérisée en ce qu'il est prévu un dispositif de blocage, par exemple un dispositif de blocage à lamelle, pour arrêter le siège (15) et le support de dossier (25) dans la position désirée.
  20. Chaise de travail selon l'une quelconque des revendications 1 à 19, caractérisée en ce que le siège (15) est fortement galbé.
  21. Chaise de travail selon l'une quelconque des revendications 4 à 20, caractérisée en ce que la disposition de l'axe d'articulation (23), de l'axe d'articulation (35) et du point d'articulation (33) est telle que, dans la position normale, l'angle d'inclinaison du siège (15) vers l'arrière est d'environ 3 degrés et le siège forme un angle d'environ 103 degrés avec le plan dans lequel se trouvent l'axe d'articulation (35) et le point d'articulation du dossier (29), et en ce que, après un pivotement du support de dossier (25) d'environ 34 degrés vers l'arrière, le siège a pivoté d'environ 5 degrés vers le haut.
EP92910163A 1991-05-24 1992-05-22 Siege de travail, notamment siege de bureau Expired - Lifetime EP0540711B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH154991 1991-05-24
CH1549/91 1991-05-24
PCT/CH1992/000097 WO1992020262A1 (fr) 1991-05-24 1992-05-22 Siege de travail, notamment siege de bureau

Publications (2)

Publication Number Publication Date
EP0540711A1 EP0540711A1 (fr) 1993-05-12
EP0540711B1 true EP0540711B1 (fr) 1996-09-18

Family

ID=4213011

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92910163A Expired - Lifetime EP0540711B1 (fr) 1991-05-24 1992-05-22 Siege de travail, notamment siege de bureau

Country Status (8)

Country Link
EP (1) EP0540711B1 (fr)
JP (1) JPH06500944A (fr)
AT (1) ATE142857T1 (fr)
AU (1) AU1692092A (fr)
CA (1) CA2087981A1 (fr)
DE (1) DE59207171D1 (fr)
ES (1) ES2094355T3 (fr)
WO (1) WO1992020262A1 (fr)

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US8973995B2 (en) 2009-02-25 2015-03-10 Donati S.P.A. Device for synchronizing the tilt of a chair back and seat
US10098466B2 (en) 2013-12-17 2018-10-16 Donati S.P.A. Chair with adjustable backrest
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement

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AT411210B (de) 2002-03-05 2003-11-25 Hansen Eckhard Dipl Ing Stuhl
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CN101801241B (zh) * 2007-03-13 2013-06-05 Hni技术公司 动态座椅靠背腰部支撑系统
CN102098945B (zh) 2008-05-02 2013-11-06 霍沃思公司 用于重力响应式椅子的张力机构
US8449037B2 (en) 2010-04-13 2013-05-28 Herman Miller, Inc. Seating structure with a contoured flexible backrest
USD657166S1 (en) 2010-04-13 2012-04-10 Herman Miller, Inc. Chair
USD653061S1 (en) 2010-04-13 2012-01-31 Herman Miller, Inc. Chair
USD650206S1 (en) 2010-04-13 2011-12-13 Herman Miller, Inc. Chair
USD637423S1 (en) 2010-04-13 2011-05-10 Herman Miller, Inc. Chair
USD652657S1 (en) 2010-04-13 2012-01-24 Herman Miller, Inc. Chair
USD639091S1 (en) 2010-04-13 2011-06-07 Herman Miller, Inc. Backrest
MX2012012739A (es) 2010-05-05 2013-04-09 Allsteel Inc Sistema de paneles de pared movible y desinstalable para paneles de pared acristalados a tope.
JP5789753B2 (ja) * 2010-06-30 2015-10-07 コクヨ株式会社 椅子
DE202010013747U1 (de) * 2010-09-30 2012-01-13 Bock 1 Gmbh & Co. Kg Synchronmechanik
JP2012135454A (ja) * 2010-12-27 2012-07-19 Kokuyo Co Ltd 椅子
JP5863352B2 (ja) * 2011-09-16 2016-02-16 株式会社イトーキ 椅子
WO2014144143A1 (fr) 2013-03-15 2014-09-18 Hni Technologies Inc. Chaise ayant une flexion arrière activée
CN106413479A (zh) * 2014-03-28 2017-02-15 多纳蒂股份公司 用于同步椅子的椅背和椅座的倾斜的装置
USD731833S1 (en) 2014-04-17 2015-06-16 Allsteel Inc. Chair
WO2015160693A1 (fr) 2014-04-17 2015-10-22 Hni Technologies Inc. Support lombaire souple
DE102014220695A1 (de) 2014-10-13 2016-04-28 Haworth Gmbh Stuhl, insbesondere Bürostuhl
USD743180S1 (en) 2014-10-15 2015-11-17 Hni Technologies Inc. Chair
US9801470B2 (en) 2014-10-15 2017-10-31 Hni Technologies Inc. Molded chair with integrated support and method of making same
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
ES3035683T3 (en) 2019-02-21 2025-09-08 Steelcase Inc Body support member
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
NO348018B1 (no) * 2023-10-23 2024-06-24 Sykkylven Staal As Sittemøbel med bevegelig sete og rygg

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DE8614186U1 (de) * 1986-05-26 1986-07-17 Drabert Söhne GmbH & Co, 4950 Minden Stuhl
DE3700447A1 (de) * 1987-01-09 1988-07-21 Vogt Bueromoebel Sitzmoebel
US4834454A (en) * 1987-05-15 1989-05-30 Faultless-Doerner Manufacturing Inc. Office chair with tiltable seat and back
DE3900220A1 (de) * 1989-01-05 1990-07-12 Wilkhahn Wilkening & Hahne Stuhl

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8973995B2 (en) 2009-02-25 2015-03-10 Donati S.P.A. Device for synchronizing the tilt of a chair back and seat
US10098466B2 (en) 2013-12-17 2018-10-16 Donati S.P.A. Chair with adjustable backrest
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement

Also Published As

Publication number Publication date
CA2087981A1 (fr) 1992-11-25
WO1992020262A1 (fr) 1992-11-26
ATE142857T1 (de) 1996-10-15
EP0540711A1 (fr) 1993-05-12
AU1692092A (en) 1992-12-30
DE59207171D1 (de) 1996-10-24
JPH06500944A (ja) 1994-01-27
ES2094355T3 (es) 1997-01-16

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