US20080238165A1 - Recline Mechanism For Seating Furniture - Google Patents

Recline Mechanism For Seating Furniture Download PDF

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Publication number
US20080238165A1
US20080238165A1 US10/577,115 US57711504A US2008238165A1 US 20080238165 A1 US20080238165 A1 US 20080238165A1 US 57711504 A US57711504 A US 57711504A US 2008238165 A1 US2008238165 A1 US 2008238165A1
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US
United States
Prior art keywords
cavity
seating furniture
frame
extending portion
support member
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.)
Abandoned
Application number
US10/577,115
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English (en)
Inventor
Paul Matthew Freestone
Murray Neil Pilcher
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.)
Furnware Ltd
Original Assignee
Furnware Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34511355&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20080238165(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Furnware Ltd filed Critical Furnware Ltd
Publication of US20080238165A1 publication Critical patent/US20080238165A1/en
Assigned to FURNWARE LIMITED reassignment FURNWARE LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FREESTONE, PAUL MATTHEW, PILCHER, MURRAY NEIL
Abandoned 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
    • 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
    • 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • 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
    • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable 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
    • A47C7/36—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
    • A47C7/448—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks

Definitions

  • This invention relates to furniture and in particular though not solely to a recline mechanism for use in seats or chairs which allows for tilt adjustment of the seatback and/or base of the seat or chair.
  • Seating furniture such as chairs, seats or even sofas may be of a fixed design wherein the base of the seat (hereinafter referred to as the seat base, base or simply seat) is substantially immovable (although it may include a cushion) but is not tiltable with respect to the frame of the item of furniture.
  • the seatback of the chair is also substantially immovable and therefore the item of furniture is not readily adjustable to a user's changing seating position. Accordingly, after long periods of use in such a fixed item of seating furniture a user often becomes uncomfortable and/or develops an altered seating position which is unsupported by the structure of the seating furniture and which may ultimately lead to posture problems or, for example, backache.
  • Seating furniture may also come in an adjustable variety whereby the seat and/or back of the chair is adjustable with respect to the frame of the chair in order to adapt to a user's posture or seating position.
  • many office chairs include a number of user alterable features including seat and seatback angle adjustment.
  • a complicated mechanism is provided for locking the seat and/or seatback in position once a suitable angle has been attained by the user.
  • a spring or an alternative biasing mechanism is usually required in order to provide resistance to the movement of the seat and/or back over their range of movement so that the user does not completely lose support during the adjustment process.
  • the invention may broadly be said to consist in seating furniture including:
  • housing/cavity and extending portion may be respectively positioned on the support member and frame or vice versa
  • the present invention is described herein with reference to the housing being positioned on the support member for sake of clarity and readability. It will be appreciated this is purely exemplary, and the invention is not restricted to this configuration.
  • the extending portion of the frame is fixed relative to at least a portion of the frame to which the support member is connected.
  • the biasing means comprises an elastic material, preferably an elastically compressible or extensible material.
  • biasing means may be configured to apply a restorative reaction force to the effects of extension or compression.
  • the extending portion may for example may be at least partially enveloped by, or fixed to, the biasing means which in turn is fixed to the cavity wall.
  • any rotation of extending portion would cause an extension of the biasing means and thereby generate a reactionary restorative biasing force against the rotation.
  • the invention is henceforth described with reference to a compressible biasing means, though again this is for exemplarily purposes only and does not exclude the invention from utilising extensible biasing means.
  • the biasing means is cylindrical or tubular in shape.
  • the invention may broadly be said to consist in seating furniture including:
  • At least an end portion of the extending portion of the frame is rod-like in shape and the biasing means is positioned about the extending portion.
  • the cavity in the housing is substantially triangular in cross-section.
  • the cavity in the housing has a centrally-waisted configuration in cross-section, i.e. two opposing triangular portions joined at a common apex in a substantially “bow-tie” shape.
  • the plate-like extending portion extends longitudinally into the centrally-waisted cavity and is pivotable laterally about a central pivot point of the cavity.
  • the rod-like extending portion extends laterally into the centrally-waisted cavity and is pivotable longitudinally about a central pivot point of the cavity.
  • biasing means are provided about both ends of the rod-like shaped end portion of the extending portion of the frame.
  • said housing is integral with said support member.
  • said housing is connectable to said support member.
  • said housing comprises a first section integrally formed with the support member and a second section connectable to the first section wherein the cavity is formed between the first and second sections.
  • said support member includes a seat.
  • said support member includes a seatback.
  • the support member is provided with stopper means adapted to contact the frame.
  • the frame is provided with stopper means against which the support member comes into contact.
  • said biasing means is formed from elastomeric material or natural rubber.
  • the biasing force provided by the biasing means is adjustable by altering the length of the elastomeric or natural rubber material within the cavity.
  • the biasing force provided by the biasing means is adjustable by altering the density of the elastomeric or natural rubber material within the cavity.
  • FIGS. 1A to 1C are a series of side-elevational views of a chair incorporating a recline mechanism according to the present invention being utilised by a user in various seating positions;
  • FIG. 2 is a side-elevational view of the seat base of the seat shown in FIGS. 1A to 1C ;
  • FIGS. 3A to 3C are a series of cross-sectional side-elevational views of the recline mechanism shown in FIG. 2 in different positions with the seat base removed for clarity;
  • FIG. 4 is a side-elevational view of the seatback of the seat shown in FIGS. 1A to 1C ;
  • FIGS. 5A to 5C are a series of cross-sectional side-elevational views of the recline mechanism shown in FIG. 4 in different positions with the seat back removed for clarity.
  • FIG. 6A shows a perspective view of a second embodiment of a chair according to the present invention.
  • FIG. 6B shows a side elevation of the chair shown in FIG. 6A ;
  • FIG. 6C shows an underside plan view of the chair shown in FIG. 6A ;
  • FIG. 6D shows a rear side elevation view of the chair shown in FIG. 6A ;
  • FIG. 6E shows a front side elevation view of the chair shown in FIG. 6A ;
  • FIG. 7A shows a perspective view of second embodiment of a chair according to the present invention.
  • FIG. 7B shows a side elevation of the chair shown in FIG. 7A ;
  • FIG. 7C shows an underside plan view of the chair shown in FIG. 7A ;
  • FIG. 7D shows a rear side elevation view of the chair shown in FIG. 7A ;
  • FIG. 7E shows a front side elevation view of the chair shown in FIG. 7A ;
  • a chair or seat 1 in accordance with the present invention is shown in use by a user in three distinct positions.
  • the chair includes support members which provide support to a user in use.
  • the support members include a seatback 2 and a seat or seat base 3 .
  • FIG. 1A shows the user reclining so that the seatback 2 is tilted backwards and the front edge of seat 3 is tilted downwards.
  • the seat In FIG. 1B the seat is in a “neutral” position wherein the user's torso is substantially vertical so that the seatback 2 is also substantially vertical and the seat 3 is substantially horizontal.
  • FIG. 1C the user is leaning slightly forward so that the seatback 2 is not substantially contacting the user and is in a similar position to that shown in FIG. 1B whereas the seat 3 is tilted forward in a similar manner to that shown in FIG. 1A .
  • FIGS. 1A to 1C show the range of movement of the seatback 2 and seat 3 of the chair incorporating a recline mechanism 4 in accordance with a preferred embodiment of the present invention.
  • the recline mechanism 4 could be associated with either the seatback 2 or the seat 3 or alternatively, as shown, both the seatback 2 and the seat 3 could have associated recline mechanisms 4 .
  • the invention will be described with reference to a standard four legged chair it should be understood that the invention could equally be utilised in, for example, an office chair, sofa, stool, bench, or even in lounging furniture such as a sofa.
  • Seat 1 includes a frame including a seatback supporting portion 5 , a seat base supporting portion 6 and legs 7 .
  • the frame may for example be constructed from metal such as solid or hollow tubular steel, from wood or even from a suitably sturdy plastics material.
  • Seat base 3 may be constructed from a suitably flexible plastics material such as polypropylene and contoured to receive a user's buttocks and upper thighs.
  • the seat could also be formed from wood such as plywood or metal, both of which may also be suitably (but more permanently) deformed to a user's body shape.
  • the recline mechanism 4 comprises two parts, a first section 8 and a second section 9 .
  • the first section 8 is formed integrally with the seat base 3 while second section 9 is separately formed and adapted to be coupled or attached to the first section 8 .
  • the recline mechanism 4 could be formed from a unitary component which is adapted to be attached to the seat base 3 or could alternatively be totally integral with the seat base 3 .
  • the recline mechanism 4 could be formed from an aluminium extrusion or from pressed or cast steel which may then be moulded within a plastics seat base 3 .
  • FIGS. 3A to 3C show in detail the operation of the recline mechanism associated with seat base 3 .
  • the front edge of the seat base 3 has been tilted downwards, similar to the position shown in FIGS. 1A and 1C .
  • the seat base 3 is in a static position without a user in the seat.
  • the seat base 3 is in a position similar to that shown in FIG. 1B with the user sitting normally.
  • the recline mechanism 4 comprises a housing including a cavity 10 .
  • An extending portion 11 of the seat supporting part of the frame is received within cavity 10 .
  • Extending portion 11 is substantially immovable with respect to the frame and so is fixed in position irrespective of the user's sitting position and the position of the seat base.
  • the housing of the recline mechanism 4 is attached to or integrally formed with the seat base 3 and therefore moves with seat base 3 so that cavity 10 effectively translates about extending part 11 during tilting movement of seat base 3 . It will be appreciated that once the extending portion 11 is captive within cavity 10 , the seat base is effectively connected to the frame.
  • the extending part 11 could comprise a flat plate extending substantially horizontally and laterally beneath the seat base 3 .
  • the housing of the recline mechanism 4 could extend laterally substantially the whole width of seat base 3 or could extend only a portion of the width of the seat base 3 .
  • a plurality of separate housings could be aligned across the width of the underside of seat base 3 through each of which the extending part 11 extends.
  • Extending part 11 could alternatively comprise a “T” or “I” shaped rod extending laterally beneath seat base 3 and including perpendicularly attached end parts, one of which is shown in FIGS. 3A to 3C and which comprises a short length of, for example, steel rod.
  • extending part 11 could in fact be any shape capable of transferring rotational movement between the frame and the housing. Accordingly, the extending part could have a square, rectangular, hexagonal, oval or other non-circular cross-section and could be solid or hollow.
  • Biasing means 12 are also provided within cavity 10 between the walls of the cavity and the extending part 11 of the frame.
  • the shape of cavity 10 in FIGS. 3A to 3C is a centrally waisted shape akin to a “bow-tie” shape and the extending part 11 pivots about the central region 13 of cavity 10 (although, as mentioned above, it is the cavity which moves or translates about the extending part).
  • the cavity therefore includes two substantially triangular shaped lobes joined at a pivot point at their apexes and the biasing means 12 cushions the motion of the extending part 11 as it moves between the sidewalls of the cavity in response to tilting forward and backward of the seat base 3 .
  • Biasing means 12 is a unitary elastically compressible material such as an elastomer or natural rubber.
  • the biasing means 12 in FIGS. 3A to 3C could comprise four separate portions of elastomeric material, one on either side of the extending portion in each of the lobes forming the cavity.
  • the biasing means 12 could be solid or hollow and could be, for example wedge shaped to substantially match the shape of each half-lobe.
  • the flat plate forming the extending portion 11 would therefore extend longitudinally through the cavity 10 which pivots laterally about the pivot point.
  • the biasing means 12 could be formed in a tubular shape which is easily slipped over the end of a rod comprising the end portion of extending portion 11 .
  • the biasing means 12 may comprise two tubular sections of elastomeric material, each one positioned over a respective end of a rod forming the end part of the extending portion 11 . in this case, the rod forming the extending portion would extend laterally into the cavity and pivot longitudinally about the pivot point of the cavity.
  • Biasing means 12 acts to cushion the movement of the extending part as the user tilts the seat base forward and backward of its static position.
  • the biasing means also provides a restorative force to assist in returning the seat base to its static or neutral position as it decompresses.
  • Seatback 2 includes supporting surface 14 against which the user's back rests in use.
  • the backside of seatback 2 includes a recline mechanism 4 which, as previously described with reference to the seat base 3 , comprises a housing including a cavity 10 .
  • the housing could be a two part housing as shown in FIG. 4 with first 8 and second 9 sections or could be a unitary housing attached to or integral with seatback 2 .
  • the seatback 2 could be formed from a plastics material such as polypropylene or alternatively from wood such as plywood or even from metal such as aluminium or steel.
  • the recline mechanism 4 could be formed as an aluminium extrusion or from pressed or cast steel that could then be integrally moulded into a plastics seatback 2 .
  • the housing of the recline mechanism 4 could extend laterally across the entire width of the seatback 2 or could extend only a portion of the width of the seatback.
  • a plurality of separate housings could be spaced across the width of the seatback with their cavities 10 aligned with one another.
  • An extending part 11 of the frame of the seat extends through the cavity (or cavities) formed in the housing and a biasing means 12 is provided between the wall of the cavity and extending portion 11 of the frame.
  • the biasing means 12 is preferably tubular and is formed from an elastomeric material or natural rubber but could equally be formed without a central opening or could be formed in a different shape such as a wedge shape. However, it has been found that the tubular shape shown in FIG. 4 does provide satisfactory results in the present invention.
  • FIG. 4 shows the shape of cavity 10 when there is no user in the seat.
  • FIG. 5A shows the position of the housing and therefore the seatback when the user is in a normal seating position (that is, slightly reclined)
  • FIG. 5C shows the position of the housing and therefore the seatback in a substantially fully reclined position.
  • the extending portion 11 of the frame may comprise a plate extending laterally from the seat back supporting part 4 of the frame which is rigidly connected to the frame so that it does not move although the housing of the recline mechanism 4 translates about it. It can be seen from the series of drawings in FIGS. 5A to 5C that as the user reclines the seatback 2 further, the volume of the portion of the cavity 10 in which the biasing means 12 is positioned is reduced and therefore the compressive state of the biasing means is altered. Accordingly, during the complete range of movement of the seatback 2 the biasing means will provide some resistance to that movement or, in the case of the seatback moving from a reclined position towards its static position then the biasing means will assist in restoring the seatback's position as it decompresses.
  • the length of tube positioned within cavity 10 may be adjusted so that a longer tube will of course increase the resistance and restorative force provided by the biasing means 12 and a shorter length of tube would reduce the amount of resistance and restorative force provided.
  • stoppers may be provided on the frame to contact with the seatback and/or seat base, halting further motion prior to the biasing means reaching its compressibility limit thereby avoiding premature damage to the biasing means.
  • the support member 2 , 3 could be provided with a stopper or stoppers positioned so as to contact the frame during movement.
  • FIGS. 6A-6F show a further embodiment of the present invention where like components in common with the previously described embodiments are like numbered.
  • the set base supporting portion 6 and a pair of legs 7 on each side of the chair 1 are formed from a single continuous tube bent into an ‘n’ shape.
  • the seat 3 is mounted slightly higher above the seat base supporting portion 6 than in the previous embodiment to reduce the possibility of a user trapping and possibly injuring fingers between the frame and seat 3 during tilting.
  • Stoppers 15 are also positioned on the seat base supporting portion 6 either side of the recline mechanism 4 to limit the maximum extent of seat 3 tilt.
  • FIGS. 7A-7F shows a further variant of the embodiment of FIGS. 1-6 .
  • the embodiment shown in FIG. 7A-7F utilises a skid-leg configuration.
  • This configuration replaces the four conventional legs located at the corners of a typical seat with a pair of ‘C’ shape frames 27 on opposing sides of the chair 1 .
  • the fore leg 7 is replaced by a floor contacting portion 16 forming the lower side of the C-shaped legs 27 connected to an upright rearward leg portion 17 in turn connected to a seat base supporting section 18 orientated substantially parallel to the floor contacting portion 16 .
  • the C-shaped leg configuration enables multiple chairs 1 to be nested without the need to completely pick up a chair before stacking it over another chair. This can be particularly useful in schools and the like.
US10/577,115 2003-10-24 2004-10-22 Recline Mechanism For Seating Furniture Abandoned US20080238165A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ529154A NZ529154A (en) 2003-10-24 2003-10-24 Recline mechanism for seating furniture
NZ529154 2003-10-24
PCT/NZ2004/000262 WO2005039361A2 (en) 2003-10-24 2004-10-22 Recline mechanism for seating furniture

Publications (1)

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US20080238165A1 true US20080238165A1 (en) 2008-10-02

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Application Number Title Priority Date Filing Date
US10/577,115 Abandoned US20080238165A1 (en) 2003-10-24 2004-10-22 Recline Mechanism For Seating Furniture

Country Status (7)

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US (1) US20080238165A1 (ja)
EP (1) EP1679994A2 (ja)
JP (1) JP2007508891A (ja)
AU (1) AU2004283634C1 (ja)
CA (1) CA2543258A1 (ja)
NZ (1) NZ529154A (ja)
WO (1) WO2005039361A2 (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8636322B1 (en) * 2012-11-09 2014-01-28 Hong Woei Enterprise Co., Ltd. Seat backrest auto back-up unit
US20140239686A1 (en) * 2011-08-04 2014-08-28 Cramer Llc Ergonomic seating assemblies and methods
WO2015117225A1 (en) * 2014-02-04 2015-08-13 Teknion Limited Chair with coupled seat and backrest tilt mechanism
US20160157615A1 (en) * 2014-12-04 2016-06-09 Pro-Cord S.P.A. Chair with elastically-deformable seat and backrest
US20160255960A1 (en) * 2014-12-04 2016-09-08 Pro-Cord S.P.A. Chair with elastically-deformable seat and/or backrest
US11510495B1 (en) 2021-05-14 2022-11-29 Steelcase Inc. Chair having an accessory hook
USD1009536S1 (en) 2021-05-17 2024-01-02 Steelcase Inc. Chair

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
CN102151026B (zh) 2007-01-29 2016-05-18 赫尔曼米勒有限公司 座位结构及其使用方法
US7695067B2 (en) 2007-03-02 2010-04-13 Goetz Mark W Ergonomic adjustable chair
US8944507B2 (en) 2009-10-13 2015-02-03 Herman Miller, Inc. Ergonomic adjustable chair mechanisms
CN117355239A (zh) * 2021-02-24 2024-01-05 理斯罗知识产权有限公司 对座椅的改进

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140239686A1 (en) * 2011-08-04 2014-08-28 Cramer Llc Ergonomic seating assemblies and methods
US9498066B2 (en) * 2011-08-04 2016-11-22 Cramer Llc Ergonomic seating assemblies and methods
US10226129B2 (en) 2011-08-04 2019-03-12 Cramer Llc Ergonomic seating assemblies and methods
US8636322B1 (en) * 2012-11-09 2014-01-28 Hong Woei Enterprise Co., Ltd. Seat backrest auto back-up unit
WO2015117225A1 (en) * 2014-02-04 2015-08-13 Teknion Limited Chair with coupled seat and backrest tilt mechanism
US20160157615A1 (en) * 2014-12-04 2016-06-09 Pro-Cord S.P.A. Chair with elastically-deformable seat and backrest
US20160255960A1 (en) * 2014-12-04 2016-09-08 Pro-Cord S.P.A. Chair with elastically-deformable seat and/or backrest
US9826838B2 (en) * 2014-12-04 2017-11-28 Pro-Cord S.P.A. Chair with elastically-deformable seat and/or backrest
US11510495B1 (en) 2021-05-14 2022-11-29 Steelcase Inc. Chair having an accessory hook
US11857083B2 (en) 2021-05-14 2024-01-02 Steelcase Inc. Chair having a flexible support member
USD1009536S1 (en) 2021-05-17 2024-01-02 Steelcase Inc. Chair

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Publication number Publication date
WO2005039361A2 (en) 2005-05-06
NZ529154A (en) 2006-07-28
WO2005039361A3 (en) 2005-06-02
EP1679994A2 (en) 2006-07-19
JP2007508891A (ja) 2007-04-12
CA2543258A1 (en) 2005-05-06
AU2004283634A1 (en) 2005-05-06
AU2004283634C1 (en) 2011-12-08
AU2004283634B2 (en) 2010-03-11

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