US3583759A - Molded chair shell - Google Patents
Molded chair shell Download PDFInfo
- Publication number
- US3583759A US3583759A US866914A US3583759DA US3583759A US 3583759 A US3583759 A US 3583759A US 866914 A US866914 A US 866914A US 3583759D A US3583759D A US 3583759DA US 3583759 A US3583759 A US 3583759A
- Authority
- US
- United States
- Prior art keywords
- shell
- waist portion
- chair
- inch
- waist
- 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
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/12—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats with shell-shape seat and back-rest unit, e.g. having arm rests
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C5/00—Chairs of special materials
- A47C5/04—Metal chairs, e.g. tubular
- A47C5/06—Special adaptation of seat upholstery or fabric for attachment to tubular chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C5/00—Chairs of special materials
- A47C5/12—Chairs of special materials of plastics, with or without reinforcement
-
- 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
- A47C7/02—Seat parts
- A47C7/029—Seat parts of non-adjustable shape adapted to a user contour or ergonomic seating positions
-
- 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
- A47C7/02—Seat parts
- A47C7/16—Seats made of wooden, plastics, or metal sheet material; Panel seats
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S297/00—Chairs and seats
- Y10S297/02—Molded
Definitions
- 97l 3583759 SHEET 1 OF 2 INVENTOR. 4/050 ,4 KRAMER 1 m Eum+ MOLDED CHAIR sasu.
- a further ob ject has been to overcome such problems with respect to chairs in which such a shell is flexibly secured in a frame at two laterally spaced points under the seat portion and at a single central point behind the middle of the back portion that pennit the desired distortion of the shell relative the rigid under structure.
- FIG. 1 is a side view of a chair incorporating a frame and a chair shell produced according to this invention
- FIG. 2 is a flattened diagrammatic view graphically showing various formation thicknesses of a preferred form of a molded chair shell
- FIGS. 3, 4 and are cross-sectional views taken, respectively, in the planes 3-3, 4-4 and 5-5 of FIG. 2;
- FIG. 6 is a cross section of the waist portion of the shell of FIG. 1 showing the concavoconvex nature of the shell at the waist portion;
- FIG. 7 is a partial plan view of an alternate construction according to this invention.
- FIG. 8 is a cross section on line 8-8 of FIG. 7;
- FIG. 9 is a cross section on line 9-9 of FIG. 7;
- FIG. 10 is a schematic sketch illustrating a functional design principle embodied in the chair shell of this invention.
- FIG. 11 is a cross section of the waist portion of a flanged chair shell of the prior art
- FIG. 12 is a cross section of an alternate edge reinforced waist section of a prior art chair shell design.
- FIG. 13 is a cross section of an alternate structure stiffening and reinforcing the shell waist portion.
- Typical of such prior art construction is the flange l6, seen in FIG. 11, at the margin of the waist portion of shell 18.
- the fissures mentioned generally occurred in the region indicated 20 in FIG. 11. Their occurrence becomes particularly apparent when the shell is flexed in directions tending to open the ell-shaped whereupon the forces applied to the shell tend to close the ell-shape. In that case the surface 20 is subjected to compressive forces tending to reduce its surface dimensions.
- FIG. 12 An alternate solution to the problem is illustrated in FIG. 12 in which, in lieu of the flange 16, as shown in FIG. 11, the chair shell 22 at the marginal edges of its waist portion has a thickened edge 24 materially greater than the medial thickness of the waist 22 to resist the flexural and torsional forces.
- the chair shell can be made so rigid and be so inflexibly mounted in a chair frame that no flexure in the waist portion between the seat and the back portion is permitted. This, however, defeats the purpose of this chair design which is purposely flexible.
- the seat portion and the back portion are mounted in supporting frame structure at two points laterally spaced apart and located beneath the seat portion and at a single centrally located point behind the back portion.
- the chair comprises supporting frame structure including an upright column 30 having splayed feet 32 to bear on the floor. Rising above column 30 and extending rearward is an ogeeshaped arm 34 which is medial of the frame. Forward curving support arm 36 is bifurcated to provide two arms 38 that spread from the central column 30 forward and laterally to support the seat. Central arm 40 medial of flared arms 38 carries a stop or bumper 42.
- the chair shell 44 comprises a seat portion 46 and a back portion 48 integrally joined by the concavoconvex flangeless waist portion 47.
- a flexible mount 50 is secured to the center back 48 and is also secured to bar 34 by a fastening 52.
- each of the anns 38 is likewise secured beneath the seat portion at points laterally spaced apart with respect to the median of the shell 44 and approximately in the fore-to-aft middle of seat portion 46.
- the forward edge of seat 46 is cantilevered with respect to the remainder of the structure. Bar 40 and the bumper 42 carried thereby may be used to limit downward deflection of seat 46.
- a chair shell designed to accommodate predetermined stresses and strains may have applied to it forces that exceed the structural limitations and flexural characteristics of the material.
- an overweight person or, as is more likely, a normal weight person may sit on the chair in such manner that an excessive amount of loading force is applied to the forward portion of the seat ahead of the pivots thus tending to longitudinally straighten the waist portion.
- This may subject the skin surfaces of the shell to excessive compressive and tensile forces.
- bumpers 42 as mounted on bars 40, may be provided.
- the spacing between the bumpers 42 and the bottom of the shell in the at rest" position permits the designer to vary the stopping action of the bumper with respect to any particular shell design.
- a shell may be designed with such heavy cross sections that the stops may not be needed to prevent excessive forces. This, however, defeats the purpose of the invention because such a heavy shell would not have the desired flexure characteristics.
- FIG. 2 shows a preferred form of fiberglass-reinforced molded shell as it would appear when flattened to schematically depict its shape and structural thicknesses.
- the shell is formed by laying up fiberglass-reinforcing filaments and fluid plastic material prior to molding in a variety of thicknesses in the pattern shown in FIG. 2.
- area 62 which has a final molded thickness in the range of between about 0.090 inch and about 0.120 inch.
- edge areas 64, 66, 68 and 70 are built up to a substantial thickness comparable to area 60.
- area 60 has a thickness of 0.109 inch
- area 62 has a thickness of 0.120 inch
- the marginal area 72 of the waist 47 has a thickness of 0.100 inch.
- the shell is thickened to 0.300 inch in areas 74 and 76, in the latter of which is mounted stud 70, as seen in FIG. 5, by which mount 54 is attached to seat portion 46.
- FIG. 10 a hollow-walled hemisphere in the nature of a flexible hemispherical shell, for example, a half a rubber ball, is shown.
- a hollow-walled hemisphere in the nature of a flexible hemispherical shell, for example, a half a rubber ball, is shown.
- FIGS. 7, 0 and 9 is shown an alternative construction in which the chair shell 90, which may be of substantially uniform thickness throughout, is provided with auxiliary flexible means that bolster and reinforce the shell between its point of attachment to the resilient mount 50 and its points of attachment to the resilient mounts 54.
- a flexible preformed arcuate resilient metallic member 92 having the upstanding portion 94 and the bifurcated legs 96 and 98, is provided. Member 92 is secured mechanically or adhesively in close proximity to the back and underside of the shell separated from the chair frame structure by the resilient mounts 50 and 54,54.
- Member 92 has a predetermined flexibility of such a nature that it, added to the flexibility of the shell 90, in the medial waist portion of said shell, is less than the flexibility of the otherwise unsupported margins of the waist portion 47 which is preferably flangeless. In this arrangement there is appreciably less resistance to flexure at the waist margins than in the stiffer medial portion of the waist thus permitting flexing without undue elongation at the waist margins.
- FIG. 13 Further modes of stiffening or strengthening a shell of substantially uniform thickness is shown in FIG. 13.
- the shell 100 has a main rib I02 and, as desired, supplementary ribs 104 extending through the back side of the waist portion of the shell.
- ribs 102, I04 By proportioning ribs 102, I04, various degrees of stiffness or resilience can be obtained without interfering with waist cupping while avoiding the application of excessive elongation forces at the margins of the waist.
- a chair comprising:
- an ell-shaped chair shell of fiberglass-reinforced molded plastic material having a seat portion and a back portion integrally joined thereto by a flexible concavoconvex waist portion;
- said shell being secured by resilient mounts to supporting frame structure at two points laterally spaced apart and located beneath the seat portion and at one centrally located point behind the back portion; the resilient mounts as said points permitting the concavoconvex waist portion to cup as the relative positions of the seat and back portions change under loading;
- the improvement comprising: flexible means separated from said frame by said mounts and in close proximity to said shell;
- said flexible means extending between said one centrally located point and each of said two laterally spaced apart points and imparting to said shell, medial of said waist portion, a flexural rigidity appreciably greater than the flexural rigidity of the margins of said waist portion.
- a chair according to claim 4 in which said shell, medial of said waist portion has a molded thickness of about 0. inch and the margins of said waist portion taper therefrom to a thickness of about 0100 inch.
Landscapes
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs Characterized By Structure (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US86691469A | 1969-10-16 | 1969-10-16 | |
GB8965/71A GB1276273A (en) | 1969-10-16 | 1971-04-07 | Chairs |
FR7112692A FR2133165A5 (de) | 1969-10-16 | 1971-04-09 | |
DE2118216A DE2118216C3 (de) | 1969-10-16 | 1971-04-10 | L-förmige Sitzschale für Sitzmöbel |
Publications (1)
Publication Number | Publication Date |
---|---|
US3583759A true US3583759A (en) | 1971-06-08 |
Family
ID=43060071
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US866914A Expired - Lifetime US3583759A (en) | 1969-10-16 | 1969-10-16 | Molded chair shell |
Country Status (4)
Country | Link |
---|---|
US (1) | US3583759A (de) |
DE (1) | DE2118216C3 (de) |
FR (1) | FR2133165A5 (de) |
GB (1) | GB1276273A (de) |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4781417A (en) * | 1987-12-07 | 1988-11-01 | Ford Motor Company | Upholstered seat cushion support |
US5123702A (en) * | 1990-10-24 | 1992-06-23 | Shelby Williams Industries, Inc. | Interaction-high density stacking chair |
US5308142A (en) * | 1992-01-23 | 1994-05-03 | Steelcase, Inc. | Chair with arm mounted motion control |
US5516134A (en) * | 1994-09-20 | 1996-05-14 | Perfect Season, Inc. | Seat for a wheeled vehicle |
US5577811A (en) * | 1995-06-07 | 1996-11-26 | Hon Industries Inc. | Ergonomic chair |
US5733003A (en) * | 1995-08-25 | 1998-03-31 | Xsci, Inc. | Child safety seat |
US5887951A (en) * | 1995-09-15 | 1999-03-30 | Willingham; W. Preston | Orthopedic seating orthosis for correcting posture and restricting gluteal spreading |
US6179255B1 (en) | 1999-07-22 | 2001-01-30 | John W. Radford | Seat mounting assembly |
US6811227B2 (en) | 2003-03-24 | 2004-11-02 | Lear Corporation | Firm cushion |
US6874831B1 (en) * | 2000-07-06 | 2005-04-05 | Compagnie Plastic Omnium | Front structure for a motor vehicle |
US20070007812A1 (en) * | 2003-08-28 | 2007-01-11 | Peter Doricko | Seat area |
US7523992B1 (en) * | 2007-08-02 | 2009-04-28 | Da Yin Wei Tong Co., Ltd. | Mechanisms for flexibly securing J-bar to chair backrest and chair headrest respectively |
US20100038946A1 (en) * | 2008-08-11 | 2010-02-18 | Hni Technologies Inc. | Seat damper assembly |
US9560917B2 (en) | 2014-11-26 | 2017-02-07 | Steelcase Inc. | Recline adjustment system for chair |
USD802951S1 (en) | 2016-04-12 | 2017-11-21 | Steelcase Inc. | Chair |
USD804209S1 (en) | 2016-04-12 | 2017-12-05 | Steelcase Inc. | Chair |
USD804839S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD804841S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD804876S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD804840S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD804875S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD808187S1 (en) | 2016-04-12 | 2018-01-23 | Steelcase Inc. | Seating shell |
USD821793S1 (en) | 2016-04-12 | 2018-07-03 | Steelcase Inc. | Seating shell |
US10016061B2 (en) * | 2016-02-15 | 2018-07-10 | Interstuhl Bueromoebel Gmbh & Co. Kg | Backrest for an office chair |
US10021984B2 (en) | 2015-04-13 | 2018-07-17 | Steelcase Inc. | Seating arrangement |
US10194750B2 (en) | 2015-04-13 | 2019-02-05 | Steelcase Inc. | Seating arrangement |
US10966527B2 (en) | 2017-06-09 | 2021-04-06 | Steelcase Inc. | Seating arrangement and method of construction |
US11109683B2 (en) | 2019-02-21 | 2021-09-07 | Steelcase Inc. | Body support assembly and method for the use and assembly thereof |
USD932203S1 (en) | 2016-04-12 | 2021-10-05 | Steelcase Inc. | Seating arrangement |
US11259637B2 (en) | 2015-04-13 | 2022-03-01 | 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 |
US11382429B2 (en) * | 2018-05-30 | 2022-07-12 | Aichi Co., Ltd. | Backrest and chair |
US11589678B2 (en) | 2019-01-17 | 2023-02-28 | Hni Technologies Inc. | Chairs including flexible frames |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2222840C2 (de) * | 1972-05-10 | 1984-05-17 | Baresel-Bofinger, Rudolf, 7129 Ilsfeld | Sessel |
JPS5588713A (en) * | 1978-12-27 | 1980-07-04 | Tachikawa Spring Co | Sheet for car in synthetic resin |
DE8504604U1 (de) * | 1985-02-19 | 1986-06-19 | Eisen- Und Drahtwerk Erlau Ag, 7080 Aalen | Sitzmöbel |
US5567012A (en) * | 1986-04-10 | 1996-10-22 | Steelcase, Inc. | Chair control |
US5050931A (en) * | 1986-04-10 | 1991-09-24 | Steelcase Inc. | Controlled deflection front lip for seating |
DE3622038A1 (de) * | 1986-07-01 | 1988-01-07 | Kembo Bv | Stuhl oder sessel |
DE3633696A1 (de) * | 1986-10-03 | 1988-04-14 | Froescher August Gmbh Co Kg | Stuhl |
DE10397012A5 (de) | 2002-02-13 | 2014-11-27 | Herman Miller, Inc. | Neigesessel mit flexibler Lehne, einstellbaren Armlehnen und einstellbarer Sitztiefe und Verfahren für seine Verwendung |
US7077478B2 (en) * | 2004-05-31 | 2006-07-18 | Honda Motor Co., Ltd. | Seat for vehicle |
DE202010000811U1 (de) * | 2010-01-12 | 2011-05-19 | Topstar GmbH, 86863 | Sitz- oder Liegemöbel |
USD657166S1 (en) | 2010-04-13 | 2012-04-10 | 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 |
USD653061S1 (en) | 2010-04-13 | 2012-01-31 | Herman Miller, Inc. | Chair |
US8449037B2 (en) | 2010-04-13 | 2013-05-28 | Herman Miller, Inc. | Seating structure with a contoured flexible backrest |
USD639091S1 (en) | 2010-04-13 | 2011-06-07 | Herman Miller, Inc. | Backrest |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3133765A (en) * | 1962-08-30 | 1964-05-19 | Ion Corp | Chair |
US3235309A (en) * | 1963-12-23 | 1966-02-15 | Brunswick Corp | Chair |
US3328085A (en) * | 1966-02-09 | 1967-06-27 | Gen Tire & Rubber Co | Seat suspension |
US3476342A (en) * | 1968-01-26 | 1969-11-04 | Griggs Equipment Inc | Chair bracket |
-
1969
- 1969-10-16 US US866914A patent/US3583759A/en not_active Expired - Lifetime
-
1971
- 1971-04-07 GB GB8965/71A patent/GB1276273A/en not_active Expired
- 1971-04-09 FR FR7112692A patent/FR2133165A5/fr not_active Expired
- 1971-04-10 DE DE2118216A patent/DE2118216C3/de not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3133765A (en) * | 1962-08-30 | 1964-05-19 | Ion Corp | Chair |
US3235309A (en) * | 1963-12-23 | 1966-02-15 | Brunswick Corp | Chair |
US3328085A (en) * | 1966-02-09 | 1967-06-27 | Gen Tire & Rubber Co | Seat suspension |
US3476342A (en) * | 1968-01-26 | 1969-11-04 | Griggs Equipment Inc | Chair bracket |
Cited By (46)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4781417A (en) * | 1987-12-07 | 1988-11-01 | Ford Motor Company | Upholstered seat cushion support |
US5123702A (en) * | 1990-10-24 | 1992-06-23 | Shelby Williams Industries, Inc. | Interaction-high density stacking chair |
US5308142A (en) * | 1992-01-23 | 1994-05-03 | Steelcase, Inc. | Chair with arm mounted motion control |
US5516196A (en) * | 1992-01-23 | 1996-05-14 | Steelcase, Inc. | Chair with arm mounted motion control |
US5516134A (en) * | 1994-09-20 | 1996-05-14 | Perfect Season, Inc. | Seat for a wheeled vehicle |
US5577811A (en) * | 1995-06-07 | 1996-11-26 | Hon Industries Inc. | Ergonomic chair |
US5733003A (en) * | 1995-08-25 | 1998-03-31 | Xsci, Inc. | Child safety seat |
US5887951A (en) * | 1995-09-15 | 1999-03-30 | Willingham; W. Preston | Orthopedic seating orthosis for correcting posture and restricting gluteal spreading |
US6179255B1 (en) | 1999-07-22 | 2001-01-30 | John W. Radford | Seat mounting assembly |
US6874831B1 (en) * | 2000-07-06 | 2005-04-05 | Compagnie Plastic Omnium | Front structure for a motor vehicle |
US6811227B2 (en) | 2003-03-24 | 2004-11-02 | Lear Corporation | Firm cushion |
US20070007812A1 (en) * | 2003-08-28 | 2007-01-11 | Peter Doricko | Seat area |
US7523992B1 (en) * | 2007-08-02 | 2009-04-28 | Da Yin Wei Tong Co., Ltd. | Mechanisms for flexibly securing J-bar to chair backrest and chair headrest respectively |
US20100038946A1 (en) * | 2008-08-11 | 2010-02-18 | Hni Technologies Inc. | Seat damper assembly |
US8322794B2 (en) * | 2008-08-11 | 2012-12-04 | Hni Technologies Inc. | Seat damper assembly |
US9560917B2 (en) | 2014-11-26 | 2017-02-07 | Steelcase Inc. | Recline adjustment system for chair |
US11259637B2 (en) | 2015-04-13 | 2022-03-01 | Steelcase Inc. | Seating arrangement |
US11963621B2 (en) | 2015-04-13 | 2024-04-23 | Steelcase Inc. | Seating arrangement |
US11553797B2 (en) | 2015-04-13 | 2023-01-17 | Steelcase Inc. | Seating arrangement |
US11324325B2 (en) | 2015-04-13 | 2022-05-10 | Steelcase Inc. | Seating arrangement |
US11096497B2 (en) | 2015-04-13 | 2021-08-24 | Steelcase Inc. | Seating arrangement |
US10575648B2 (en) | 2015-04-13 | 2020-03-03 | Steelcase Inc. | Seating arrangement |
US10194750B2 (en) | 2015-04-13 | 2019-02-05 | Steelcase Inc. | Seating arrangement |
US10021984B2 (en) | 2015-04-13 | 2018-07-17 | Steelcase Inc. | Seating arrangement |
US10016061B2 (en) * | 2016-02-15 | 2018-07-10 | Interstuhl Bueromoebel Gmbh & Co. Kg | Backrest for an office chair |
USD821793S1 (en) | 2016-04-12 | 2018-07-03 | Steelcase Inc. | Seating shell |
USD804839S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD808187S1 (en) | 2016-04-12 | 2018-01-23 | Steelcase Inc. | Seating shell |
USD804875S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD804841S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD804840S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
USD804209S1 (en) | 2016-04-12 | 2017-12-05 | Steelcase Inc. | Chair |
USD932203S1 (en) | 2016-04-12 | 2021-10-05 | Steelcase Inc. | Seating arrangement |
USD802951S1 (en) | 2016-04-12 | 2017-11-21 | Steelcase Inc. | Chair |
USD804876S1 (en) | 2016-04-12 | 2017-12-12 | Steelcase Inc. | Chair |
US11825955B2 (en) | 2017-06-09 | 2023-11-28 | Steelcase Inc. | Seating arrangement and method of construction |
US10966527B2 (en) | 2017-06-09 | 2021-04-06 | Steelcase Inc. | Seating arrangement and method of construction |
US11382429B2 (en) * | 2018-05-30 | 2022-07-12 | Aichi Co., Ltd. | Backrest and chair |
AU2019279177B2 (en) * | 2018-05-30 | 2022-07-14 | Aichi Co., Ltd. | Backrest and chair |
US11589678B2 (en) | 2019-01-17 | 2023-02-28 | Hni Technologies Inc. | Chairs including flexible frames |
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 |
Also Published As
Publication number | Publication date |
---|---|
FR2133165A5 (de) | 1972-11-24 |
DE2118216A1 (de) | 1972-10-12 |
GB1276273A (en) | 1972-06-01 |
DE2118216B2 (de) | 1979-11-08 |
DE2118216C3 (de) | 1980-07-24 |
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