EP0247311B1 - Chair - Google Patents

Chair Download PDF

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Publication number
EP0247311B1
EP0247311B1 EP87104184A EP87104184A EP0247311B1 EP 0247311 B1 EP0247311 B1 EP 0247311B1 EP 87104184 A EP87104184 A EP 87104184A EP 87104184 A EP87104184 A EP 87104184A EP 0247311 B1 EP0247311 B1 EP 0247311B1
Authority
EP
European Patent Office
Prior art keywords
seat
support
lever
seat support
parallelogram
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
EP87104184A
Other languages
German (de)
French (fr)
Other versions
EP0247311A3 (en
EP0247311A2 (en
Inventor
Max Lanuzzi
Fredi Dubach
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.)
Drabert Soehne GmbH and Co
Original Assignee
Drabert Soehne GmbH and Co
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 Drabert Soehne GmbH and Co filed Critical Drabert Soehne GmbH and Co
Publication of EP0247311A2 publication Critical patent/EP0247311A2/en
Publication of EP0247311A3 publication Critical patent/EP0247311A3/en
Application granted granted Critical
Publication of EP0247311B1 publication Critical patent/EP0247311B1/en
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
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
    • A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for 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
    • A47C1/03255—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

Definitions

  • the invention relates to a chair with a seat support, on which a seat plate is supported by means of a rear link, and also with a backrest support, which is articulated on the seat support, the seat plate being additionally connected to the seat support via a front link.
  • Such chairs are known in various designs, including from DE-A 35 37 203.
  • the invention has for its object to provide a chair of the type mentioned in such a way that an adjustment of the adjusting force for the backrest is not necessary and thus the restoring force for the backrest increases with increasing user weight.
  • the seat support is connected via a front and a rear parallelogram link to a fixed inclination support which is fixed to the lower part of the chair, the parallelogram links being additionally articulated by means of a parallel guide link and a first energy store between the seat support and inclination support and a second energy storage between backrest support and seat support are effective.
  • both energy stores are preloaded to a greater or lesser extent depending on the user weight. This has the consequence that the movement of the backrest runs more or less smoothly with the synchronized movement of the seat coupled therewith.
  • the chair is shown in the extreme inclination positions of the backrest, specifically drawn in the front end position and dashed lines in the rear end position. Leaning against the backrest causes the seat 11 to move in synchronism with the backrest movement. The size of the restoring forces for this movement is automatically adjusted by the adjusting mechanism described in more detail below in accordance with the body weight of the user.
  • parallelogram links 3 are articulated, the ends of which are connected via a parallel guide link 4.
  • the parallelogram link 3 are also articulated on a seat support 7.
  • the parallelogram link 3 and the parallel guide link 4 articulated together.
  • a second energy accumulator 15 is likewise designed as a tension spring and is articulated on the one hand at the articulation point 3a and on the other hand at the articulation point 12a.
  • the articulation point 12a is the articulation point of the rear link 12 on the seat 11.
  • the rear link 12 is articulated on the seat support 7 with its other end.
  • the seat 11 is also attached to the seat support 7 via the handlebar 10.
  • the backrest support 14a the front, angled region 14 of which is connected to a link 13 is articulated on the seat support 7 so as to be pivotable about the articulation point 14b.
  • the link 13 is in turn articulated approximately in the middle of the rear link 12.
  • the embodiment according to FIGS. 6 and 7 differs from the embodiment according to FIGS. 2 to 5 only in the different design and arrangement of the energy accumulator 15 ⁇ .
  • the energy accumulator 15 ⁇ is articulated on the one hand at the articulation point 14c and on the other hand at the articulation point 7a of the seat support 7.
  • the mode of operation of the adjusting mechanism can be seen from a comparison of FIG. 2 with FIG. 3.
  • the parallelogram 3 moves against the force of the tension spring 5 to the right. This reduces the distance between the parallel guide link 4 and the inclination bracket 1 from the value A (FIG. 2) to the value C.
  • the seat bracket 7 is also moved more or less far forward by the pivoting movement of the parallelogram link 3 according to the weight of the user (dimension D).
  • the energy accumulator 5 is preloaded to a greater or lesser extent in accordance with the user weight.
  • the energy accumulator 15 is also biased more or less strongly by the parallel displacement in accordance with the user weight, with the result that the movement of the backrest with the synchronized movement of the seat coupled therewith runs more or less smoothly.

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

Description

Die Erfindung betrifft einen Stuhl mit Sitzträger, an welchem eine Sitzplatte mittels eines hinteren Lenkers abgestützt ist, ferner mit einem Rückenlehnenträger, der am Sitzträger angelenkt ist, wobei die Sitzplatte zusätzlich über einen vorderen Lenker mit dem Sitzträger verbunden ist.The invention relates to a chair with a seat support, on which a seat plate is supported by means of a rear link, and also with a backrest support, which is articulated on the seat support, the seat plate being additionally connected to the seat support via a front link.

Derartige Stühle sind in verschiedenen Ausführungen bekannt, unter anderem aus DE-A 35 37 203. Ein ähnlicher Stuhl, bei dem die Verbindung zwischen Sitzplatte und zusätzlichem vorderen Lenker mit dem Sitzträger fehlt, ist bekannt aus DE-PS 28 22 574.Such chairs are known in various designs, including from DE-A 35 37 203. A similar chair, in which the connection between the seat plate and additional front handlebar with the seat support is missing, is known from DE-PS 28 22 574.

Bei allen derartigen bekannten Stühlen muß die Verstellkraft für die Rückenlehnenneigung vom Benutzer eingestellt werden. Es handelt sich um einen zusätzlichen Verstellvorgang, neben anderen vom Benutzer ohnehin vorzunehmenden Verstellvorgängen, wie Höhenverstellung. In der Praxis führen die vielen Verstellmöglichkeiten dazu, daß sie häufig entweder nicht wahrgenommen werden oder daß sogar Fehleinstellungen vorgenommen werden.In all such known chairs, the adjustment force for the backrest inclination must be set by the user. It is an additional adjustment process, in addition to other adjustment processes to be carried out by the user anyway, such as height adjustment. In practice, the many adjustment options mean that they are often either not noticed or that incorrect settings are even made.

Ausgehend von dem bekannten Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Stuhl der eingangs erwähnten Art so auszubilden, daß eine Einstellung der Verstellkraft für die Rückenlehne nicht erforderlich ist und damit mit zunehmendem Benutzergewicht die Rückstellkraft für die Rückenlehne zunimmt.Based on the known prior art, the invention has for its object to provide a chair of the type mentioned in such a way that an adjustment of the adjusting force for the backrest is not necessary and thus the restoring force for the backrest increases with increasing user weight.

Die Lösung dieser Aufgabe erfolgt dadurch, daß die Sitzträger über einen vorderen und einen hinteren Parrallelogrammlenker mit einem ortsfesten Neigungsträger verbunden ist, der am Stuhlunterteil fest ist, wobei die Parallelogrammlenker zusätzlich mittels eines Parallelführungslenkers gelenkig verbunden sind und ein erster Kraftspeicher zwischen Sitzträger und Neigungsträger sowie ein zweiter Kraftspeicher zwischen Rückenlehnenträger und Sitzträger wirksam sind.This object is achieved in that the seat support is connected via a front and a rear parallelogram link to a fixed inclination support which is fixed to the lower part of the chair, the parallelogram links being additionally articulated by means of a parallel guide link and a first energy store between the seat support and inclination support and a second energy storage between backrest support and seat support are effective.

Bei einem derartigen Stuhl werden beide Kraftspeicher entsprechend dem Benutzergewicht mehr oder weniger stark vorgespannt. Dies hat zur Folge, daß die Bewegung der Rückenlehne mit der damit gekoppelten Synchronbewegung des Sitzes mehr oder weniger leichtgängig abläuft.In such a chair, both energy stores are preloaded to a greater or lesser extent depending on the user weight. This has the consequence that the movement of the backrest runs more or less smoothly with the synchronized movement of the seat coupled therewith.

Bevorzugte Ausführungsformen der Erfindung sind in den Unteransprüchen beschrieben.Preferred embodiments of the invention are described in the subclaims.

Nachstehend werden bevorzugte Ausführungsformen der Erfindung anhnad der Zeichnung im einzelnen erläutert. Es zeigen:

Figur 1 -
eine schematische Seitenansicht eines Stuhls,
Figur 2 -
eine schematische Seitenansicht des Sitzbereichs in einer ersten Position ohne Belastung durch einen Benutzer,
Figur 3 -
eine nur einen Teilbereich von Figur 2 dar stellende Seitenansicht bei Belastung durch einen Benutzer,
Figur 4 -
eine Seitenansicht des Stuhls bei nach vorne verschwenkter Rückenlehne,
Figur 5 -
die Seitenansicht gemäß Figur 4 bei nach hinten verschwenkter Rückenlehne,
Figur 6 -
eine zu Figur 5 analoge Seitenansicht einer zweiten Ausführungsform,
Figur 7 -
eine Ansicht von unten auf die Darstellung gemäß Figur 6.
Preferred embodiments of the invention are explained in detail below with reference to the drawing. Show it:
Figure 1 -
a schematic side view of a chair,
Figure 2 -
FIG. 2 shows a schematic side view of the seating area in a first position without any load from a user,
Figure 3 -
only one part of Figure 2 side view when loaded by a user,
Figure 4 -
a side view of the chair with the backrest pivoted forward,
Figure 5 -
3 the side view according to FIG. 4 with the backrest pivoted backwards,
Figure 6 -
5 shows a side view analogous to FIG. 5 of a second embodiment,
Figure 7 -
a bottom view of the representation of Figure 6.

In Figur 1 ist der Stuhl in den extremen Neigungspositionen der Rückenlehne dargestellt, und zwar durchgehend gezeichnet in der vorderen Endstellung und gestrichelt in der hinteren Endstellung. Durch das Anlehnen an die Rückenlehne wird bewirkt, daß sich der Sitz 11 synchron zur Rückenlehnenbewegung mitbewegt. Die Größe der Rückstellkräfte für diese Bewegung wird durch den nachstehend näher beschriebenen Einstellmechanismus entsprechend dem Körpergewicht des Benutzers automatisch eingestellt.In Figure 1, the chair is shown in the extreme inclination positions of the backrest, specifically drawn in the front end position and dashed lines in the rear end position. Leaning against the backrest causes the seat 11 to move in synchronism with the backrest movement. The size of the restoring forces for this movement is automatically adjusted by the adjusting mechanism described in more detail below in accordance with the body weight of the user.

An einem Neigungsträger 1, der mit dem Stuhlunterteil 2 verbunden ist, sind Parallelogrammlenker 3 angelenkt, deren Enden über einen Parallelführungslenker 4 verbunden sind. Die Parallelogrammlenker 3 sind außerdem an einem Sitzträger 7 angelenkt. Ein erster Kraftspeicher 5, der in allen Ausführungsbeispielen als Zugfeder ausgebildet ist, ist einerseits am Sitzträger 7 und andererseits am Anlenkpunkt 6 befestigt. Am Anlenkpunkt 6 laufen der Parallelogrammlenker 3 und der Parallelführungslenker 4 gelenkig zusammen.On an inclination bracket 1, which is connected to the lower chair part 2, parallelogram links 3 are articulated, the ends of which are connected via a parallel guide link 4. The parallelogram link 3 are also articulated on a seat support 7. A first energy accumulator 5, which is designed as a tension spring in all exemplary embodiments, is fastened on the one hand to the seat support 7 and on the other hand to the articulation point 6. At pivot point 6 the parallelogram link 3 and the parallel guide link 4 articulated together.

Ein zweiter Kraftspeicher 15 ist bei den Ausführungsformen gemäß Figuren 2 bis 5 ebenfalls als Zugfeder ausgebildet und einerseits am Gelenkpunkt 3a sowie andererseits am Gelenkpunkt 12a angelenkt. Der Gelenkpunkt 12a ist der Anlenkpunkt des hinteren Lenkers 12 am Sitz 11. Der hintere Lenker 12 ist mit seinem anderen Ende am Sitzträger 7 angelenkt.In the embodiments according to FIGS. 2 to 5, a second energy accumulator 15 is likewise designed as a tension spring and is articulated on the one hand at the articulation point 3a and on the other hand at the articulation point 12a. The articulation point 12a is the articulation point of the rear link 12 on the seat 11. The rear link 12 is articulated on the seat support 7 with its other end.

Der Sitz 11 ist ferner über den Lenker 10 am Sitzträger 7 befestigt.The seat 11 is also attached to the seat support 7 via the handlebar 10.

Weiterhin ist am Sitzträger 7 um den Gelenkpunkt 14b verschwenkbar der Rückenlehnenträger 14a angelenkt, dessen vorderer, abgewinkelter Bereich 14 mit einem Lenker 13 verbunden ist. Der Lenker 13 ist seinerseits etwa in der Mitte des hinteren Lenkers 12 angelenkt.Furthermore, the backrest support 14a, the front, angled region 14 of which is connected to a link 13, is articulated on the seat support 7 so as to be pivotable about the articulation point 14b. The link 13 is in turn articulated approximately in the middle of the rear link 12.

Die Ausführungsform gemäß Figuren 6 und 7 unterscheidet sich von der Ausführungsform gemäß Figuren 2 bis 5 lediglich durch die unterschiedliche Ausbildung und Anordnung des Kraftspeichers 15ʹ. Der Kraftspeicher 15ʹ ist bei der zweiten Ausführungsform einerseits am Gelenkpunkt 14c und andererseits am Gelenkpunkt 7a des Sitzträgers 7 angelenkt.The embodiment according to FIGS. 6 and 7 differs from the embodiment according to FIGS. 2 to 5 only in the different design and arrangement of the energy accumulator 15ʹ. In the second embodiment, the energy accumulator 15ʹ is articulated on the one hand at the articulation point 14c and on the other hand at the articulation point 7a of the seat support 7.

Aus einem Vergleich von Figur 2 mit Figur 3 ist die Wirkungsweise des Einstellmechanismus sichtbar. Bei Be lastung gemäß Pfeil B (vgl. Figur 3) wandern die Parallelogrammlenker 3 gegen die Kraft der Zugfeder 5 nach rechts. Hierdurch verringert sich der Abstand zwischen dem Parallelführungslenker 4 und dem Neigungsträger 1 vom Wert A (Figur 2) auf den Wert C. Auch wird der Sitzträger 7 durch die Schwenkbewegung der Parallelogrammlenker 3 entsprechend dem Gewicht des Benutzers mehr oder weniger weit nach vorn bewegt (Maß D).The mode of operation of the adjusting mechanism can be seen from a comparison of FIG. 2 with FIG. 3. At Be load according to arrow B (see FIG. 3), the parallelogram 3 moves against the force of the tension spring 5 to the right. This reduces the distance between the parallel guide link 4 and the inclination bracket 1 from the value A (FIG. 2) to the value C. The seat bracket 7 is also moved more or less far forward by the pivoting movement of the parallelogram link 3 according to the weight of the user (dimension D).

Der bisher beschriebene Mechanismus dient nicht nur zur Sitzfederung in Abhängigkeit von dem Gewicht des Benutzers sondern auch dazu, die gewichtsabhängige Einstellung und Synchronbewegung des Neigungsmechanismus zu bewerkstelligen:The mechanism described so far is not only used for seat suspension depending on the weight of the user but also to accomplish the weight-dependent adjustment and synchronous movement of the tilt mechanism:

Wird der Stuhl benutzt, so wird der Kraftspeicher 5 entsprechend dem Benutzergewicht mehr oder weniger stark vorgespannt. Gleichzeitig wird der Kraftspeicher 15 durch die Parallelverschiebung entsprechend dem Benutzergewicht ebenfalls mehr oder weniger stark vorgespannt mit der Folge, daß die Bewegung der Rückenlehne mit der damit gekoppelten Synchronbewegung des Sitzes mehr oder weniger leicht gängig abläuft.If the chair is used, the energy accumulator 5 is preloaded to a greater or lesser extent in accordance with the user weight. At the same time, the energy accumulator 15 is also biased more or less strongly by the parallel displacement in accordance with the user weight, with the result that the movement of the backrest with the synchronized movement of the seat coupled therewith runs more or less smoothly.

Der am Sitzträger 7 im Punkt 14b gelagerte Rückenlehnenträger 14a verschwenkt den Lenkhebel 13 über den Bereich 14. Der Lenker 13 verschwenkt über den Lenker 12 den Sitz 11 derart, daß in Verbindung mit dem vorderen Lenker 10 der Sitz aus der Normalstellung heraus hinten stärker als vorn abgesenkt wird und dabei der Rückenlehne folgend eine Bewegung nach hinten ausführt.The backrest support 14a mounted on the seat support 7 at point 14b pivots the steering lever 13 over the region 14. The handlebar 13 pivots the seat 11 via the handlebar 12 in such a way that, in conjunction with the front handlebar 10, the seat out of the normal position is stronger at the rear than at the front is lowered and moves backwards following the backrest.

Bei Entlastung des Stuhls werden die Ausgangspositionen wieder eingenommen.When the chair is relieved, the starting positions are taken up again.

Claims (8)

  1. Chair featuring a seat support, on which a seat plate (11) is propped by means of a back lever, as well as a backrest support (14a) linked to the seat support (7) in a pivotable fashion, with the seat plate (11) additionally connected to the seat support (7) via a front lever (10),
    characterized in that the seat support (7) is connected, through a front and a back parallelogram lever (3), to a fixed tilt support (1) rigidly fastened to the bottom part of the seat (2), with the parallelogram levers (3) being additionally connected to each other in a pivotable manner by a parallelogram lever (4) and an energy accumulator (5) acting between the seat support (7) and the tilt support (1) and another energy accumulator (15) acting between the backrest support (14a) and the seat support (7).
  2. Chair according to Claim 1
    characterized in that an energy accumulator (5) is connected on the one hand to the seat support (7) and on the other hand to a joint (6) of the parallelogram lever (4) and the parallelogram lever (3).
  3. Chair according to Claim 1 or 2
    characterized in that another energy accumulator (15) is connected on the one hand to the pivotal point (12a) of the lever (12) at the seat (11) and on the other hand to a joint (3a) of the parallelogram lever (4) and the parallelogram lever (3).
  4. Chair according to one or several of Claims 1 to 3 characterized in that the second energy accumulator (15') is both linked to the seat support (7) and the backrest support (14a).
  5. Chair according to one or several of Claims 1 to 4 characterized in that a portion (14) of the backrest support (14a) reaches beyond its pivotal point (14b) at the seat support (7) and that this portion is connected to a lever (13), which, in turn, is linked to the back lever (12) connecting the seat support (7) to the seat (11).
  6. Chair according to one or several of Claims 1 to 5 characterized in that the parallelogram levers (3) are triangular in shape, with a joint in each corner.
  7. Chair according to one or several of Claims 1 to 6 characterized in that the energy accumulators (5 and 15) are springs.
  8. Chair according to one or several of Claims 1 to 6 characterized in that at least one energy accumulator (15') is a pneumatic spring device.
EP87104184A 1986-05-26 1987-03-21 Chair Expired - Lifetime EP0247311B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19863617624 DE3617624A1 (en) 1986-05-26 1986-05-26 CHAIR
DE8614185U DE8614185U1 (en) 1986-05-26 1986-05-26 chair
DE3617624 1986-05-26

Publications (3)

Publication Number Publication Date
EP0247311A2 EP0247311A2 (en) 1987-12-02
EP0247311A3 EP0247311A3 (en) 1988-04-06
EP0247311B1 true EP0247311B1 (en) 1991-03-13

Family

ID=42108201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104184A Expired - Lifetime EP0247311B1 (en) 1986-05-26 1987-03-21 Chair

Country Status (8)

Country Link
US (1) US4761033A (en)
EP (1) EP0247311B1 (en)
JP (1) JPS6365817A (en)
AU (1) AU581367B2 (en)
CA (1) CA1278992C (en)
DE (3) DE8614185U1 (en)
DK (1) DK166401B1 (en)
NO (1) NO166518C (en)

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USD463144S1 (en) 2000-09-28 2002-09-24 Formway Furniture Limited Chair
DE10122945A1 (en) * 2001-05-11 2002-12-12 Armin Sander Chair, especially office chair
DE10219478B4 (en) * 2002-04-30 2006-07-13 Klöber GmbH Chair with user weight dependent power storage
EP2561777A1 (en) * 2011-08-25 2013-02-27 Uhlenbrock, Johannes Synchronisation mechanism for a chair
DE202014100062U1 (en) * 2014-01-08 2015-04-10 Innotec Motion GmbH Seating furniture with springy backrest
US11589678B2 (en) 2019-01-17 2023-02-28 Hni Technologies Inc. Chairs including flexible frames

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EP0281845A1 (en) * 1987-02-25 1988-09-14 Köhl Gmbh Swivel chair or seat with synchronized inclination of backrest and seat
US4966411A (en) * 1987-10-24 1990-10-30 Kokuyo Co., Ltd. Chair provided with a backrest
DE3900220A1 (en) * 1989-01-05 1990-07-12 Wilkhahn Wilkening & Hahne CHAIR
US4943114A (en) * 1989-02-06 1990-07-24 Giancarlo Piretti Chair backrest linkage mechanism
JPH03222907A (en) * 1989-11-30 1991-10-01 Itoki Kosakusho Co Ltd Elastic force regulator of desk
US5224758A (en) * 1989-12-27 1993-07-06 Itoki Crebio Corporation Tilting control assembly for chair
DE4019876A1 (en) * 1990-06-22 1992-01-02 Simon Desanta CHAIR, ESPECIALLY OFFICE CHAIR
US5318345A (en) * 1991-06-07 1994-06-07 Hon Industries, Inc. Tilt back chair and control
AU665208B2 (en) * 1991-08-22 1995-12-21 Duffield, Anne Constance Weight compensating chair backrest
CA2319884C (en) 1992-06-15 2001-12-04 Herman Miller, Inc. Pneumatic support column for a chair
DE4233628A1 (en) * 1992-10-06 1994-04-07 Comforto Gmbh Chair, especially office or work chair
AU7244294A (en) * 1993-06-02 1994-12-20 Sava Cvek Articulated support chair
DE4327373C2 (en) * 1993-08-14 1997-07-17 Girsberger Holding Ag Chair, especially office chair
EP1258216A3 (en) * 1997-02-28 2003-01-22 Kjartan Alvestad Adjustment device for beds and other reclining or seating furniture
US6139103A (en) * 1997-03-12 2000-10-31 Leggett & Platt, Inc. Synchronized chair seat and backrest tilt control mechanism
JP3136280B2 (en) * 1997-04-28 2001-02-19 株式会社いのうえアソシエーツ Chair
DE29718696U1 (en) * 1997-10-21 1998-02-26 InterCo Gesellschaft für die Planung und den Vertrieb von Reha Hilfen mbH, 53783 Eitorf Movable seating arrangement
US5979984A (en) * 1997-10-24 1999-11-09 Steelcase Development Inc. Synchrotilt chair with forwardly movable seat
ITTO980034A1 (en) * 1998-01-16 1999-07-16 Miotto Int Comp MECHANICAL DEVICE FOR THE CONTROL OF THE SYNCHRONOUS MOVEMENT OF THE SEAT AND BACKREST OF A SEAT.
US6250715B1 (en) 1998-01-21 2001-06-26 Herman Miller, Inc. Chair
DE19823632C1 (en) 1998-05-27 1999-09-30 Roeder Peter Office chair
US6709058B1 (en) * 1999-04-09 2004-03-23 Humanscale Corp. Ergonomic chair
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NO871685D0 (en) 1987-04-23
NO166518B (en) 1991-04-29
CA1278992C (en) 1991-01-15
DK166401B1 (en) 1993-05-17
DE3768556D1 (en) 1991-04-18
AU7335587A (en) 1987-12-03
EP0247311A3 (en) 1988-04-06
DK265487D0 (en) 1987-05-25
DE3617624A1 (en) 1987-12-03
AU581367B2 (en) 1989-02-16
US4761033A (en) 1988-08-02
NO871685L (en) 1987-11-27
EP0247311A2 (en) 1987-12-02
DE8614185U1 (en) 1986-07-17
JPS6365817A (en) 1988-03-24
NO166518C (en) 1991-08-07
DK265487A (en) 1987-11-27

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