EP2100539A1 - Dispositif de dossier - Google Patents

Dispositif de dossier Download PDF

Info

Publication number
EP2100539A1
EP2100539A1 EP09154755A EP09154755A EP2100539A1 EP 2100539 A1 EP2100539 A1 EP 2100539A1 EP 09154755 A EP09154755 A EP 09154755A EP 09154755 A EP09154755 A EP 09154755A EP 2100539 A1 EP2100539 A1 EP 2100539A1
Authority
EP
European Patent Office
Prior art keywords
backrest
chair
pivot
pivotally connected
pivot axis
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.)
Withdrawn
Application number
EP09154755A
Other languages
German (de)
English (en)
Inventor
Ralph-Christian Schmidt
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.)
Savo AS
Original Assignee
Savo AS
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 Savo AS filed Critical Savo AS
Publication of EP2100539A1 publication Critical patent/EP2100539A1/fr
Withdrawn legal-status Critical Current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
    • A47C1/03294—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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/405—Support for the head or the back for the back with double backrests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs

Definitions

  • the present invention relates to a device for a chair, such as a desk chair, comprising an undercarriage, a column and/or a support unit, a chair seat and a backrest.
  • a seat plate is generally attached to a support unit by it self, or also to a column, a lower portion of which in turn is attached to an undercarriage.
  • the undercarriage comprises a number of feet with wheels to be able to move the chair while a user is sitting in the chair.
  • the backrest may be attached to a rear portion of the seat plate, or to a rear portion of the support unit under the seat plate. Possibly, a lower portion of the backrest is attached, via a joint, to said seat plate or support unit in order to make possible to change the angle of the backrest relative to the seat plate.
  • the curvature of the user's back is changed relative to an upright sitting position.
  • the upper part of the user's back take up a part of the body weight relative to that of an upright sitting position, in which mainly the seat and the underside of the thighs take up the load.
  • the backrest withdraws from the user's back upon reclining, and the user looses contact with the backrest.
  • an adaptive support of the user's back upon reclining the backrest is obtained by virtue of the backrest being split horizontally and hinged at a vertical distance from the seat plate.
  • a breakpoint in the backrest is formed, where the angle of the upper part of the backrest may be changed.
  • the angle of the upper part of the backrest may be changed as a function of the reclined angle of the chair seat.
  • the present invention thus relates to a device for a chair comprising an undercarriage with a support unit for a chair seat and a backrest, the chair seat being pivotally connected to the support unit about a first pivot axis, and the backrest being pivotally connected to the chair seat, characterized in that:
  • the present invention also relates to a chair comprising a device as described above.
  • a chair comprising a device as described above.
  • front In the following description, the terms “front”, “in front of” and “forward” are used with respect to the horizontal direction onto which the face and the chest of the person sitting in the chair is facing during normal use.
  • back at the back of
  • behind or “backwards” are used with respect to the opposite horizontal direction, i.e. the direction onto which the back of a person sitting in the chair is mostly facing during normal use.
  • pivoting elements such as pivotal joints, attachments, connections or pivoting axes, etc. discussed in the application, shall be considered to be pivotal about axes that are horizontal and perpendicular to the plane of symmetry through the chair, unless specifically stated otherwise.
  • “Middle” and “middle portion” implies areas of the chair positioned in the immediate vicinity of the plane of symmetry through the chair, as opposed to "right”, “left” and “outer transverse areas", which are the areas furthest away from the plane of symmetry.
  • Figure 1 shows an embodiment of the present device for a chair comprising an undercarriage 10 with an upwards-extending support unit 20 supporting a chair seat 30 with a backrest 40.
  • the front lower edge of the chair seat 30 is pivotally connected to a front part of the support unit 20 about a first axis 1, which herein is termed a seat joint, which renders possible to tilt the seat by lowering or raising the rear part of the chair seat.
  • the rear part of the chair seat 30 comprises a substantially vertical lower backrest part 42 of the backrest 40, which may be rigid or semi-rigid in order to provide the desired combination of comfort and support for the user's back.
  • the height of the lower backrest part 42 may be selected freely but, preferably, it extends up to the lumbar region of the user of the chair, and the upper edge thereof is pivotally connected to the upper backrest part 41 about a second pivot axis 2, positioned at a backrest joint, which allows the angle of the upper backrest part 41 to be changed relative to the chair seat 30 and/or the lower backrest part 42.
  • a pulling element 50 here appearing in the form of an angled bow at a first end of a substantially horizontal part, is pivotally connected to the support unit 20 about a third pivot axis 3, herein termed a pulling element joint positioned behind the first pivot axis 1, and also that the pulling element 50, at a second end of an upright part, is pivotally connected to an upper part of the upper backrest part 41 about a fourth pivot axis 4, herein termed a neck joint.
  • the chair seat 30, at the underside thereof, is pivotally connected to the pulling element 50, here on the substantially horizontal part of the angled bow, about a fifth pivot axis 5, herein termed a syncro-joint, in an area behind both the first pivot axis 1 in the seat joint and the third pivot axis 3 in the pulling element joint.
  • the syncro-joint is shown as a displaceable joint in figure 1 and 2 , in which the chair seat 30 and the pulling element 50 may be displaced relative to each other during pivoting about the fifth pivot axis 5.
  • Such a displacement is necessary to allow pivoting about the pivot axes, in which the first 1, third 3, and fifth 5 pivot axes form pivotal corners of a triangular structure, and in the same manner as that of the second 2, fourth 4, and fifth 5 pivot axes.
  • one or more of the axes in each of these two triangular structures may be displaceable or have a predetermined slack to allow pivoting and avoid locking of the structures.
  • a slide track or a longitudinal recess that receives a pivot bolt, a double joint, a rail or similar, and combinations thereof, may be used to allow for a displacement between the elements connected about said pivot axes.
  • the deflection angle of the pulling element 50 will be larger than the deflection angle of the chair seat 30 relative to the support unit 20 when reclining the chair seat/backrest.
  • This angular difference between the chair seat 30 and the pulling element 50 causes the upper backrest part 41 to be pivoted backwards relative to the lower backrest part 42 and the seat 30 about a second pivot axis 2 in the backrest joint.
  • the angle at the rear of the backrest 40, between the lower 41 and upper 42 backrest parts, will thus be changed from an angle ⁇ when in the upright position ( figure 1 ) to an angle ⁇ when in the reclined position ( figure 2 ), where ⁇ > ⁇ .
  • the total curvature of the backrest 40 is increased, and the effect for the user will be increased support in the vertical position area of the backrest joint, such as in the lumbar region of the user when reclining the chair.
  • Figure 3 shows an alternative embodiment of the chair of figure 1 , wherein the upper end of the pulling element 50 comprises a headrest 60, and wherein the headrest joint is positioned at the lower edge of the headrest 60.
  • the seat joint which pivots about a first pivot axis 1 in this embodiment, is further shown as being displaceable, whereby the chair seat 30 and the support unit 20 may be displaced to some degree relative to each other, mainly horizontally back and forth.
  • at least one of the second 2, fourth 4 or fifth 5 axes are displaceable, or at least one of these elements, which are connected about these pivot axes, are flexible so as to avoid locking of the aforementioned triangular structure, but this is not shown.
  • a coiled spring 7 is positioned between the underside of the pulling element 50 and the support unit 20.
  • a spring provides a certain resistance against reclining and resets the chair seat and the backrest to an upright starting position after use.
  • this function may be provided by alternative positioning of any type of spring, such as between one or more of: the support unit 20 and the chair seat 30, the support unit 20 and the pulling element 50, the pulling element 50 and the chair seat 30, the pulling element 50 and the upper back part 41, the upper back part 41 and the lower back part 42, etc.
  • the spring may comprise one or more springs selected from: a coil spring, a leaf spring, a torsion spring or a flexible material.
  • a reclining the chair of figure 3 will lead to the same movement and curving of the backrest as that corresponding to what is shown in figure 2 .
  • the headrest 60 will assume a more upright position than that of the upper backrest part 41 owing to the fact that the upper backrest part will pivot about the fourth pivot axis relative to the headrest 60, whereby the head is held more upright than the upper part of the user's back, yet somewhat more reclined than the lower backrest part 42 of the chair seat 30.
  • the chair seat with backrest and particularly the cores thereof, are made of rigid or semi-rigid materials, such as plastics, wood, metal, composites or similar, preferably with an outer padding toward the side of the user.
  • the backrest may alternatively be made of softer materials, such as flexible plastics, particularly in sections replacing, for example, the physical joints described above.
  • Figure 5 shows an embodiment having the backrest 40 split horizontally in three places, wherein the parts are connected to each other about three respective pivot axes 201, 202, and 203 in the form of three joints.
  • the angle between the lower 41 and the upper 42 backrest parts still has the same angle ⁇ as in figure 5 , but with this embodiment a less sharp transition is obtained in the backrest upon reclining than that of the split in the back using one joint only, as shown in the figures above.
  • joints having a limited pivot angle are used for such pivoting, whereby the pivoting takes place within a predetermined area for each of the joints. This may be of particular importance should even more joints be used in the back of the chair, which is a foreseen alternative.
  • Figure 5 also shows an alternative embodiment wherein the joins, which provide the pivot option in the backrest, may be displaced vertically in order to change the height of the pivot point or pivot area, e.g. for adaptation thereof to the user's height.
  • the displacement may, for example, be provided by virtue of rails in the upper and the lower back parts of the chair, which preferably may be locked to keep the breakpoint area in the back in a desired position.
  • the chair also comprises a height-adjustable headrest 80 in order to adapt the chair further to the user's height.
  • the headrest 80 may be mounted onto the upper backrest part and may, as an alternative, be pivotal for adaptation to the user's sitting position.
  • the back of the chair will imitate the user's spine to a greater extent and be further adaptable thereto.
  • the upper part of the upper backrest part 41 may be provided with one or more joints.
  • the entire back of the chair may be envisaged to consist of joints only, possibly having small intermediate pieces, which preferably have individual deflection angles, and more preferably having individually adjustable deflections from the chair seat and upwards to the uppermost joint toward the pulling element or the headrest.
  • a flexible material instead of using joints in order to pivot the shape of the backrest, a flexible material, as shown in figure 6 , may be used as an alternative.
  • a flexible element 210 such as a plate of plastics, wood, metal, fibreglass or other suitable material, providing the desired flexibility.
  • the entire backrest 40 i.e. both the lower and upper parts, may be made from a flexible material assuming a curvature adapted to the user upon reducing the distance between the upper end of the backrest and the rear edge of the chair seat.
  • the flexible material should have a resistance against allowing it to be bent from its convex shape toward the user's back, to a concave shape, which would be unfavourable.
  • the material may possibly have an increasing flexibility in an upwards direction, e.g. from the rear edge of the chair seat and towards the upper edge of the backrest 40, for example by virtue of a decreasing material thickness or a variable thickness in order to obtain flexibility in certain areas.
  • the device according to the present invention has been shown by virtue of pivot axes positioned in the core of the seat back, theoretically depicted as a plane in the transverse direction having no or minimal horizontal transverse curvature, as opposed to that normally depicted for a backrest.
  • the backrest is illustrated having a curved shape with an extension in the forward direction of side supports relative to the thickness of the core.
  • the middle part of the backrest is the area behind the dashed vertical line in the back, whereas the side supports on the right and left sides of the chair are areas in front of the dashed line.
  • FIG 7B an example of horizontal frame parts is shown in perspective, the frame parts of which may provide such a curvature in the transverse direction of the backrest 40.
  • the joints providing the pivot area of the backrest may be positioned at the outer transverse sides of the backrest 40, in pairs and in parallel upwards at each side of the backrest, as shown in the figure by virtue of the four pairs of joints having pivot axes 211-214.
  • the central and middle part of the backrest 40 will be squeezed together upon reclining, as shown in figure 8 .
  • the pivot axes 211-214 of the four pairs of joints used keep their distances relative to each other, but the effective length of the middle "spine" of the chair is shortened from a length "k" in the upright position, as shown in figures 7A and 7B , to a shorter length "l” in the reclined position, as shown in figure 8 .
  • Such a reduction in length of the middle portion of the backrest will smooth out the curvature of the backrest relative to the curvature of the user's own back, whereby the user will not experience a "shirt lift" in the back, i.e.
  • the shortening from value k to value l may assume any value in accordance with what is desired to achieve, but may be e.g. a shortening in the range of 60% to 10%, possibly in the range of 40% to 25%.
  • the present invention provides a device, and a chair provided with such a device, providing good support for the user's back, possibly also for the user's head, by ensuring full contact between the back of the chair and the user's back, possibly also correct positioning of the headrest relative to the user's head.
  • the device is simple and can be made with few parts and is uncomplicated to assemble, which provides high flexibility and user friendliness and also reduces the risk of malfunctioning, such as unintentional locking of mechanisms. Moreover, the device provides for advanced adjustment of the backrest in a simple manner otherwise requiring many and complicated parts in addition to required support- or frame structures.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
EP09154755A 2008-03-10 2009-03-10 Dispositif de dossier Withdrawn EP2100539A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO20081244A NO328092B1 (no) 2008-03-10 2008-03-10 Ryggestotteanordning

Publications (1)

Publication Number Publication Date
EP2100539A1 true EP2100539A1 (fr) 2009-09-16

Family

ID=40740129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09154755A Withdrawn EP2100539A1 (fr) 2008-03-10 2009-03-10 Dispositif de dossier

Country Status (2)

Country Link
EP (1) EP2100539A1 (fr)
NO (1) NO328092B1 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011157392A1 (fr) * 2010-06-15 2011-12-22 Claudia Plikat Chaise
WO2013164078A1 (fr) * 2012-05-04 2013-11-07 Sander, Armin Chaise, en particulier chaise de bureau
US20150102647A1 (en) * 2013-10-10 2015-04-16 James E. Grove Dynamic lumbar support for a chair
US20160235203A1 (en) * 2015-02-12 2016-08-18 Wilkhahn Wilkening + Hahne Gmbh + Co. Seating furniture product
CN103167815B (zh) * 2010-06-15 2016-12-14 克劳迪娅·普利卡特 座椅
EP3345508A1 (fr) * 2017-01-04 2018-07-11 Design Ballendat GmbH Chaise à coque en une seule pièce
US10028586B2 (en) * 2012-10-18 2018-07-24 Vitra Patente Ag Seat with relative synchronous displacement between back incline and seat incline
EP3468417A4 (fr) * 2016-06-11 2019-10-30 Humanscale Corporation Siège à dossier articulé
US10842281B2 (en) 2012-09-20 2020-11-24 Steelcase Inc. Control assembly for chair
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11229294B2 (en) 2012-09-20 2022-01-25 Steelcase Inc. Chair assembly with upholstery covering
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11617444B2 (en) 2020-03-02 2023-04-04 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11812870B2 (en) 2021-02-10 2023-11-14 Steelcase Inc. Body support structure

Citations (5)

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Publication number Priority date Publication date Assignee Title
EP0343450A1 (fr) * 1988-05-26 1989-11-29 R O E D E R Gmbh Chaise, notamment chaise de travail ou de bureau
EP0559185A1 (fr) * 1992-03-03 1993-09-08 Sdm Hansen Ag Dispositif de réglage synchronisé pour chaises de bureau
DE4216159A1 (de) * 1992-05-15 1993-11-18 Kloeber Gmbh Arbeitsstuhl mit Rückenlehne und Rücken-Becken Synchronmechanik
DE19930922A1 (de) * 1998-07-09 2000-05-04 Okamura Corp Stuhl
US20020149247A1 (en) * 1999-04-09 2002-10-17 Niels Diffrient Ergonomic chair

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343450A1 (fr) * 1988-05-26 1989-11-29 R O E D E R Gmbh Chaise, notamment chaise de travail ou de bureau
EP0559185A1 (fr) * 1992-03-03 1993-09-08 Sdm Hansen Ag Dispositif de réglage synchronisé pour chaises de bureau
DE4216159A1 (de) * 1992-05-15 1993-11-18 Kloeber Gmbh Arbeitsstuhl mit Rückenlehne und Rücken-Becken Synchronmechanik
DE19930922A1 (de) * 1998-07-09 2000-05-04 Okamura Corp Stuhl
US20020149247A1 (en) * 1999-04-09 2002-10-17 Niels Diffrient Ergonomic chair

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2011267475B2 (en) * 2010-06-15 2015-12-24 MillerKnoll, Inc Chair
CN103167815A (zh) * 2010-06-15 2013-06-19 克劳迪娅·普利卡特 座椅
JP2013528452A (ja) * 2010-06-15 2013-07-11 クラウディア プリカット 椅子
CN103167815B (zh) * 2010-06-15 2016-12-14 克劳迪娅·普利卡特 座椅
US9510684B2 (en) 2010-06-15 2016-12-06 Johann Burkhard Schmitz Chair
WO2011157392A1 (fr) * 2010-06-15 2011-12-22 Claudia Plikat Chaise
US10383446B2 (en) 2010-06-15 2019-08-20 Herman Miller, Inc. Chair
JP2015519111A (ja) * 2012-05-04 2015-07-09 株式会社イトーキ 椅子、特に事務用椅子
JP2016073806A (ja) * 2012-05-04 2016-05-12 株式会社イトーキ 椅子、特に事務用椅子
JP2016093536A (ja) * 2012-05-04 2016-05-26 株式会社イトーキ 椅子、特に事務用椅子
US9609952B2 (en) 2012-05-04 2017-04-04 Itoki Corporation Chair, especially, office chair
JP2016105787A (ja) * 2012-05-04 2016-06-16 株式会社イトーキ 椅子
CN104470404B (zh) * 2012-05-04 2019-07-05 株式会社伊藤喜 办公椅
CN104470404A (zh) * 2012-05-04 2015-03-25 株式会社伊藤喜 椅特别是办公椅
WO2013164078A1 (fr) * 2012-05-04 2013-11-07 Sander, Armin Chaise, en particulier chaise de bureau
US11304528B2 (en) 2012-09-20 2022-04-19 Steelcase Inc. Chair assembly with upholstery covering
US11229294B2 (en) 2012-09-20 2022-01-25 Steelcase Inc. Chair assembly with upholstery covering
US11464341B2 (en) 2012-09-20 2022-10-11 Steelcase Inc. Chair assembly with upholstery covering
US10842281B2 (en) 2012-09-20 2020-11-24 Steelcase Inc. Control assembly for chair
US10028586B2 (en) * 2012-10-18 2018-07-24 Vitra Patente Ag Seat with relative synchronous displacement between back incline and seat incline
US9357849B2 (en) * 2013-10-10 2016-06-07 James E. Grove Dynamic lumbar support for a chair
US20150102647A1 (en) * 2013-10-10 2015-04-16 James E. Grove Dynamic lumbar support for a chair
US9700138B2 (en) * 2015-02-12 2017-07-11 Wilkhahn Wilkening + Hahne Gmbh + Co. Seating furniture product
US20160235203A1 (en) * 2015-02-12 2016-08-18 Wilkhahn Wilkening + Hahne Gmbh + Co. Seating furniture product
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11963621B2 (en) 2015-04-13 2024-04-23 Steelcase Inc. Seating arrangement
EP3468417A4 (fr) * 2016-06-11 2019-10-30 Humanscale Corporation Siège à dossier articulé
EP3345508A1 (fr) * 2017-01-04 2018-07-11 Design Ballendat GmbH Chaise à coque en une seule pièce
US11109683B2 (en) 2019-02-21 2021-09-07 Steelcase Inc. Body support assembly and method for the use and assembly thereof
US11602223B2 (en) 2019-02-21 2023-03-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11910934B2 (en) 2019-02-21 2024-02-27 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11786039B2 (en) 2019-12-13 2023-10-17 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11805913B2 (en) 2019-12-13 2023-11-07 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11357329B2 (en) 2019-12-13 2022-06-14 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11617444B2 (en) 2020-03-02 2023-04-04 Steelcase Inc. Body support assembly and methods for the use and assembly thereof
US11812870B2 (en) 2021-02-10 2023-11-14 Steelcase Inc. Body support structure

Also Published As

Publication number Publication date
NO20081244L (no) 2009-09-11
NO328092B1 (no) 2009-12-07

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