EP1559348A2 - Flexibler Stuhl mit Basissäule - Google Patents

Flexibler Stuhl mit Basissäule Download PDF

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Publication number
EP1559348A2
EP1559348A2 EP05250489A EP05250489A EP1559348A2 EP 1559348 A2 EP1559348 A2 EP 1559348A2 EP 05250489 A EP05250489 A EP 05250489A EP 05250489 A EP05250489 A EP 05250489A EP 1559348 A2 EP1559348 A2 EP 1559348A2
Authority
EP
European Patent Office
Prior art keywords
seat
frame
chair
seat bottom
attached
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Withdrawn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
EP05250489A
Other languages
English (en)
French (fr)
Inventor
Charles O. Perry
Marco C. Perry
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1559348A2 publication Critical patent/EP1559348A2/de
Withdrawn legal-status Critical Current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
    • A47C11/00—Benches not otherwise provided for
    • A47C11/005—Benches not otherwise provided for having multiple separate seats
    • 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
    • A47C3/02—Rocking chairs
    • A47C3/021—Rocking chairs having elastic frames
    • 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
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • 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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
    • 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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs

Definitions

  • the present invention relates to chairs, and more particularly to flexible chairs that combine functionality and comfort.
  • a chair that flexes, where as the back tilts, the seat travels forward and slightly upward.
  • a chair is illustrated in Fig. 1, and is disclosed in U.S. Patent Re. 36, 335, which is incorporated herein by reference.
  • the chair includes a single continuous frame 1, a seat 2 and a pivoting back 3 attached thereto. Ergometric adjustment of the chair is accomplished by tilting of the back 3 and flexure of the frame 1. Flexure of the frame 1 urges the back 3 into a normal upright position for stacking and uniform appearance.
  • the back 3 is curved and hollow, and engages the frame 1 at upper and lower curved sections of the frame 1, which sections have radii of curvatures less than that of the back 3 and which sections are positioned at a downward angle such that the effective horizontal radii of the sections in the upright position is shorter than the actual radii, causing the back 3 to rest against the curved sections and limit forward tilting of the back 3.
  • the radial movement disengages the back 3 from the curved sections due to the difference in radii, until the angle of tilt is such that the effective radii are again equal and the back 3 again rests against the curved sections of the frame and limits tilting backward.
  • the above described chair relies on the flexing of that portion of the chair frame that forms the chair's legs. Such a chair, therefore, is not compatible with a post base, and is not adjustable.
  • the present invention is a flexible chair that provides a back that tilts and a seat that travels forward and slightly upward, but in a manner that is adjustable and that is compatible with a post base.
  • the present invention is a chair on which a user can sit and recline, that includes a seat frame, a seat bottom attached to the seat frame, a seat back have a lower portion thereof rotatably attached to the seat frame, a back frame rotatably attached to an upper portion of the seat back and having at least one lower end that is slidably engaged with the seat frame or the seat bottom, a support post attached to and supporting the back frame, and at least one spring for applying a bias force between the lower end and the seat frame or the seat bottom.
  • the seat back pivots and the seat bottom slides forward.
  • the chair on which a user can sit and recline includes a seat frame, a seat bottom attached to the seat frame, a seat back have a lower portion thereof rotatably attached to the seat frame, a back frame rotatably attached to an upper portion of the seat back, a support post attached to and supporting the back frame, and a link member rotatably attached to the seat frame or the seat bottom, and attached to the support post.
  • the chair on which a user can sit and recline includes a seat frame, a seat bottom attached to the seat frame, a seat back have a lower portion thereof rotatably attached to the seat frame, a back frame rotatably attached to an upper portion of the seat back and having a pair of lower ends that are each slidably engaged with the seat frame or the seat bottom, a support post attached to and supporting the back frame, and a pair of springs each for applying a bias force between one of the lower ends and the seat frame or the seat bottom.
  • the seat back pivots and the seat bottom slides forward.
  • Figs 2-4 illustrate the chair 10 of the present invention.
  • the chair 10 is mounted on a post 12, and includes a seat bottom 14, a seat back 16, a seat frame 18, and a back frame 20.
  • the seat bottom 14 is supported by the seat frame 18.
  • Frame 18 includes a pair of first (lower) portions 18a on which the seat bottom 14 rests, and second (upper) portions 18b that rotatably attach to a lower portion of the seat back 16 (at lower pivot points 22).
  • the seat frame 18 can terminate at the lower pivot points 22, or can extend across the seat back 16 in a continuous fashion (in the same manner as disclosed in U.S. Patent Re. 36,335, which is incorporated herein by reference).
  • the back frame 20 includes first (upper) portions 20a that extend up and rotatably attach to the seat back 16 (at upper pivot points 24).
  • the back frame upper portions 20a can terminate at the upper pivot points 24, or can extend across the seat back 16 in a continuous fashion (in the same manner as disclosed in U.S. Patent Re. 36,335).
  • the back frame 20 also each includes second (lower) portions 20b that extend under the seat bottom 14 (to form rails on which the seat bottom 14 glides as further explained below).
  • a pair of glide blocks 26 are connected to the seat bottom 14, or to the seat frame lower portions 18a directly or to one of one or more cross members 28 that extend between the seat frame lower portions 18a (as illustrated in Fig. 4).
  • the glide blocks 26 each include an aperture 26a through which one of the back frame lower portions 20b slidably extend.
  • the glide blocks 26 are preferably made of a low friction material, such as acetal, brass, etc.
  • Compression springs 30 are mounted to exert a bias force between the glide blocks 26 and flanges 32 at the ends of back frame lower portions 20b. This bias force pushes the seat frame 18 backward (relative to the back frame 20) to return the seat bottom and back 14/16 to their default positions.
  • the back frame 20 is attached to the post 12, preferably via a cross member 34 extending between the back frame lower portions 20b.
  • the post 12 is fixed to the ground.
  • the back frame lower portions 20a extend down at a forward angle or position, so when the chair is in the reclined position, the back frame lower portions 20a do not protrude rearwardly to create a hazard in a row of auditorium seating behind the chair.
  • the post 12 is preferably centralized and minimized, to prevent vandalism (gum, etc.) and abuse (feet, etc.) coming from the rear row.
  • the seat back 16 pivots in the reverse direction, and the seat bottom 14 slides/drops back, until the chair 1 is back in its default position.
  • Fig. 5 illustrates the critical dimensions that adjust the feel and operation of the chair 1.
  • the angle A2 (between vertical V and seat frame first portions 18a) affects how reclined the seat is, relative to the floor.
  • the angle A1 (between vertical V and back frame lower portions 20b) dictates how much the seat bottom 14 lifts as it moves forward. The greater A1 is, the more the seat bottom 14 lifts during its forward motion.
  • the dimension B (horizontal distance from the post 12 and the upper pivot points 24) helps dictate the force needed to recline the chair 1. When the user tries to recline the chair by leaning back, the seat back 16 tilts back and pushes the seat bottom 14 forward and slightly up, in the direction of the arrows.
  • the springs 30 apply a backward force on the seat frame 18 (against the reclining force of the user). This backward force can slightly bend backward the back frame upper portions 20a.
  • the longer dimension B is, the more the back frame upper portions 20a bend.
  • adjusting the dimension B, the stiffness of back frame upper portions 20a, and/or the spring constants for springs 30 will modify the feel of the chair for optimal comfort.
  • a manual adjustment for adjusting the spring constant for or the bias force from springs 30 can be included.
  • the flange 32 can be threaded onto the end of back frame lower portion 20b to extend its length, thus reducing the bias force of the spring. When the user leaves the chair, it returns to its default position under the bias force of the springs 30.
  • Fig. 6 illustrates an alternative embodiment, where a pivoting link assembly 40 supports the seat frame 18, and the back frame 20 is fixed to the post without any sliding contact with the seat frame/bottom 18/14.
  • Pivoting link assembly 40 includes an L shaped link member 42 that is rotatably connected to the seat frame 18 and the post 12, and a spring 44 (e.g. torsion or leaf spring) that exerts a bias force downward on one end of link member 42.
  • spring 44 e.g. torsion or leaf spring
  • Fig. 7 illustrates another alternate embodiment of the flexible chair 1, where back frame lower portions 20b are attached to post 12 (without sliding contact with seat frame 18), and a U-shaped link member 50 is attached (e.g. with a weld joint 51) to the post 12 at its center.
  • the ends of link member 50 are rotatably attached (e.g. with a pin joint 52) to the seat frame 18.
  • the seat bottom 14 moves forward against the torsion movement of link member 50, which essentially acts as the return spring.
  • Fig. 8A illustrates how post 12 can include a bottom portion 60 rotatably supporting a cantilevered swing arm 62 on which the chair 1 of the present invention (of any of the above described embodiments) is mounted.
  • the bottom portion 60 may also serve as a leg for a table 64, as shown in Fig. 8A.
  • Fig. 8B illustrates how post 12 can include a standard piston (for adjusting elevation) and a 5 star caster base 70 at its lower end.
  • Fig. 9 illustrates how post 12 can include a horizontal beam 80 on which a plurality of chairs 1 of the present invention (of any of the above described embodiments) can be mounted, for compact auditorium seating.
  • the present invention is not limited to the embodiment(s) described above and illustrated herein, but encompasses any and all variations falling within the scope of the appended claims.
  • the lower portions 18a of frame 18 can be omitted, and the seat bottom 14 can be supported by the frame 18 attached to the edge of seat bottom 14.
  • the seat frame could be a hinge or other member attached to or even integrally extending from the seat bottom, that provides a rotatable connection between the seat bottom and the seat back.
  • seat frame 18 could be combined into a single member attached between the seat bottom/back 14/16.
  • back frame could be configured to have a single lower portion slidably engaged with the seat bottom 14.
EP05250489A 2004-01-29 2005-01-31 Flexibler Stuhl mit Basissäule Withdrawn EP1559348A2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US54064704P 2004-01-29 2004-01-29
US540647P 2004-01-29
US36543 2005-01-14
US11/036,543 US20050194823A1 (en) 2004-01-29 2005-01-14 Flexible chair with post base

Publications (1)

Publication Number Publication Date
EP1559348A2 true EP1559348A2 (de) 2005-08-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05250489A Withdrawn EP1559348A2 (de) 2004-01-29 2005-01-31 Flexibler Stuhl mit Basissäule

Country Status (3)

Country Link
US (1) US20050194823A1 (de)
EP (1) EP1559348A2 (de)
JP (1) JP2005211668A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1872688A1 (de) * 2006-06-29 2008-01-02 Oki Electric Industry Company, Limited Sitz
CN105962672A (zh) * 2016-06-18 2016-09-28 中山市联润五金机械有限公司 一种可折叠转椅
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
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2661841A1 (en) * 2006-08-30 2008-03-06 Itoki Corporation Chair
US8820827B2 (en) * 2011-04-15 2014-09-02 Series International Llc Removable seating system
US20130320740A1 (en) * 2012-06-05 2013-12-05 Kristen Samiee System and Method for Converting a Chair into a Yoga Chair

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE36335E (en) 1988-04-25 1999-10-12 Perry; Charles O. Flexible chair

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US2303308A (en) * 1939-07-11 1942-11-24 Warren Mcarthur Corp Metal furniture
US3049375A (en) * 1961-03-17 1962-08-14 Gustave A Carlson Reclining chairs
US3337266A (en) * 1966-02-01 1967-08-22 Belvedere Products Inc Compensating back chair
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US5114210A (en) * 1989-01-11 1992-05-19 Maxton Fox Commercial Furniture Pty. Ltd. Tilting chair with improved lumbar support
US4913492A (en) * 1989-04-03 1990-04-03 Sears Manufacturing Company Recliner for vehicle seat
US4937900A (en) * 1989-04-13 1990-07-03 Bridges Bobby L Electric sofa bed
US6467842B1 (en) * 2001-04-09 2002-10-22 Aur Hann Co., Ltd. Locating structure of a reclining leisure chair
US6644743B1 (en) * 2003-03-04 2003-11-11 Chang-Chen Lin Chair chassis

Patent Citations (1)

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USRE36335E (en) 1988-04-25 1999-10-12 Perry; Charles O. Flexible chair

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1872688A1 (de) * 2006-06-29 2008-01-02 Oki Electric Industry Company, Limited Sitz
US7819473B2 (en) 2006-06-29 2010-10-26 Oki Electric Industry Co., Ltd. Chair
US11324325B2 (en) 2015-04-13 2022-05-10 Steelcase Inc. Seating arrangement
US11096497B2 (en) 2015-04-13 2021-08-24 Steelcase Inc. Seating arrangement
US11259637B2 (en) 2015-04-13 2022-03-01 Steelcase Inc. Seating arrangement
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement
US11963621B2 (en) 2015-04-13 2024-04-23 Steelcase Inc. Seating arrangement
CN105962672A (zh) * 2016-06-18 2016-09-28 中山市联润五金机械有限公司 一种可折叠转椅
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
US11357329B2 (en) 2019-12-13 2022-06-14 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

Also Published As

Publication number Publication date
JP2005211668A (ja) 2005-08-11
US20050194823A1 (en) 2005-09-08

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