EP0250207A2 - Improvements in and relating to adjustable chairs - Google Patents

Improvements in and relating to adjustable chairs Download PDF

Info

Publication number
EP0250207A2
EP0250207A2 EP87305331A EP87305331A EP0250207A2 EP 0250207 A2 EP0250207 A2 EP 0250207A2 EP 87305331 A EP87305331 A EP 87305331A EP 87305331 A EP87305331 A EP 87305331A EP 0250207 A2 EP0250207 A2 EP 0250207A2
Authority
EP
European Patent Office
Prior art keywords
seat portion
base
chair
seat
relative
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.)
Granted
Application number
EP87305331A
Other languages
German (de)
French (fr)
Other versions
EP0250207B1 (en
EP0250207A3 (en
Inventor
Adrian Michael Reed
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.)
MINES & WEST BUSINESS FURNITURE LIMITED
Original Assignee
Mines & West Business Furniture 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
Application filed by Mines & West Business Furniture Ltd filed Critical Mines & West Business Furniture Ltd
Publication of EP0250207A2 publication Critical patent/EP0250207A2/en
Publication of EP0250207A3 publication Critical patent/EP0250207A3/en
Application granted granted Critical
Publication of EP0250207B1 publication Critical patent/EP0250207B1/en
Expired legal-status Critical Current

Links

Images

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
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
    • 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

Definitions

  • the present invention relaes to improvements in adjustable chairs.
  • a chair comprising a base, a seat and means adjustably mounting the seat on the base, the seat comprising a seat portion and a back rest portion, and the adjustable mounting means comprising a first support member and a second support member, each support member being pivotally connected to the base and the seat portion for pivotal movement relative to the base and the seat portion about generally horizontal axes extending transversely of the seat portion, the support members forming opposite sides of a quadrilateral linkage, the other sides of which are provided by the base and seat portion, which extends generally between the front and rear of the seat portion and which permits movement of the seat portion relative to the base.
  • the back rest portion may be connected for movement with one of the support members so as to move relative to the seat portion with movement of the seat portion relative to the base.
  • the quadrilateral linkage is advantageously arranged to enable the seat portion to move between a rearward lower position and a forward upper position.
  • the quadrilateral linkage may be arranged so that the angle between the seat and back rest portions decreases as the seat portion moves forwardly.
  • the chair may include stop means for limiting movement of the seat portion relative to the base.
  • Resilient means for biassing the seat portion to its forward position may also be provided.
  • the resilient means may be adjustable to adjust the biassing force and may be lockable to lock the chair in any desired position. Alternatively, the locking means may be provided separately from the biassing means.
  • the chair shown in the drawings comprises a base 1, a seat 2, comprising a seat portion 3 and a back rest portion 4, and adjustable mounting means 5 for adjustably mounting the seat 2 on the base 1 and permitting the seat to move between the positions shown in full and broken lines in Figure 1.
  • the seat and back rest portions 3,4 are shown diagrammatically and in use of the invention may comprise a load bearing part, which may be in the form of a frame work or, as shown, a shell, which may for example be moulded.
  • the load bearing part may be cushioned and upholstered.
  • the base 1 comprises an upright 6 which is supported on the ground by any suitable means.
  • upright 6 is supported by a plurality of generally radially extending legs 7 provided at their ends with castors or glides 8.
  • Upright 6 may be rotatable and adjustable in length relative to legs 7.
  • Cantilevered from the upper end of upright 6 is a pair of fixed support members 9 between which and the seat portion 3 the adjustable mounting means 5 are connected.
  • the base 1 may take other conventional forms. For example, it may comprise four legs interconnected by a framework which provides one or two fixed support members equivalent to members 9.
  • the adjustable mounting means 5 comprise two support members 10,11, each of which is connected to the member 9 of the base and to the seat portion 3 for pivotal movement relative thereto ab out generally horizontal axes 12,13,14 and 15 which extend transversely of the seat portion 3.
  • Support members 10,11 form the opposite sides of a quadrilateral linkage of which the other sides are provided by base support member 9 and seat portion 3 and which, as shown, extends generally centrally between the front and rear of the seat portion 3.
  • axes 12 and 13, 13 and 15, 15 and 14, and 14 and 12 are arranged so that seat portion 3 will, as shown in Figure 1, move relative to base 1 between a lower rearward position, shown in full lines in Figure 1 in which the seat portion may be generally rearwardly inclined, and a raised forward position, shown in broken lines in Figure 1, in which the seat portion may be substantially horizontal or slightly forwardly inclined.
  • the back rest portion 4 is advantageously connected for movement with the rearward support member 11 so that it has a fixed orientation relative to member 11 and as a consequence pivots relative to seat portion 3 as seat portion 3 is moved relative to base 1.
  • the quadrilateral linkage is designed so that, as seat portion 3 moves from its rear ward position to its forward position, the angle between the seat portion and the back rest portion decreases.
  • the back rest portion may be generally vertical.
  • resilient biassing means are provided, for biassing the seat portion to its forward position and counterbalancing the weight of the user so that the seat portion will move to its rearward position under the control of the user and specifically by the user repositioning himself in the chair.
  • the resilient biassing means 16 acts generally between axes 13 and 14 of the quadrilateral linkage, and is in the form of a "gas spring", one end of which is pivotally connected to the seat portion 3 in the region of axis 14 and the other end of which is pivotally connected to upright 6 with the line of action of the "gas spring" approximately passing through axis 13.
  • the gas spring may be arranged to provide an adjustable bias, for adjustment by the user depending on the user's weight, and it may also be provided with a manually operable lock so that the user can lock the seat portion in a required position relative to the base.
  • the gas spring 16 incorporates limits on its extension and contraction and these provide stops for limiting movement of the seat portion 3 relative to the base.
  • support members 10 and 11 are provided at each end with transversely projecting portions 10a,11a, the ends of which have blind bores for receiving stub shafts about which the members 10,11 pivot and which define the axes 12 to 15.
  • the stub shafts are mounted in base members 9 with the members 10,11 extending from between the members 9.
  • the stub shafts are mounted in a similar pair of support members 17 which are fixed to the underside of the seat portion 3.
  • biassing means may take other forms.
  • they may be provided by an adjustable torsion spring or bar incorporated in one or more of the pivot axes 12 to 15 of the quadrilateral linkage, or a tension or compression spring acting between opposed pairs of axes of the linkage.
  • the biassing means are adjustable to permit adjustment to take account of varying user weights.
  • stop means for limiting movement of the seat portion relative to the base may be, as shown, provided by the biassing means, or may be provided separately.
  • components of the quadrilateral linkage may be brought into abutment in the limit positions of the linkage.
  • locking means where provided, for locking the seat portion in a desired position relative to the base portion, may, as shown be incorporated in the biassing means or may be provided separately, for example in the form of a mechanical lock acting on one or more of the piv ot axes.
  • both of axes 12 and 13 are positioned further to the rear of the chair with the members 10,11 extending forwardly therefrom to their pivotal connections with the seat portion, member 11 being longer than member 10.
  • members 10,11 may be duplicated and extend to either side of single members 9,17.
  • member 11 may be replaced by a pair of members extending between pivot axes 13 and 15 but each shaped to form a loop between these pivot axes and which serve as the arm rests of the chair.

Abstract

The seat (2) of a chair is mounted on a base (1) by pivotal support members (10,11) which form, together with the seat and base, a quadrilateral linkage having generally horizontal axes extending transversely of the seat, the linkage extending generally between the front and rear of the seat. The spacing of the pivot axes of the support members (10,11) are selected so that the seat is movable relative to the base. Specifically, the seat portion (3) of the seat is movable between a rearwardly inclined lower position and a forward upper position. The back rest portion (4) of the seat (2) may be connected for movement with the rear-most one of the support members (11) so that it inclines relative to the seat portion (3) as the seat portion moves relative to the base.
Resilient biassing means, as shown in the form of a gas spring (16), is provided for biassing the seat portion (3) to its forward upper position and for counterbalancing the weight of the user, the user then being able to move the seat portion (3) to its rearward position by adjustment of the user's position on the chair. Locking means may be provided separately or in association with the biassing means, operable by the user to lock the chair in a desired position.

Description

  • The present invention relaes to improvements in adjustable chairs.
  • According to the present invention, there is provided a chair comprising a base, a seat and means adjustably mounting the seat on the base, the seat comprising a seat portion and a back rest portion, and the adjustable mounting means comprising a first support member and a second support member, each support member being pivotally connected to the base and the seat portion for pivotal movement relative to the base and the seat portion about generally horizontal axes extending transversely of the seat portion, the support members forming opposite sides of a quadrilateral linkage, the other sides of which are provided by the base and seat portion, which extends generally between the front and rear of the seat portion and which permits movement of the seat portion relative to the base.
  • The back rest portion may be connected for movement with one of the support members so as to move relative to the seat portion with movement of the seat portion relative to the base.
  • The quadrilateral linkage is advantageously arranged to enable the seat portion to move between a rearward lower position and a forward upper position. Where the back rest portion is connected for movement with one of the support members, the quadrilateral linkage may be arranged so that the angle between the seat and back rest portions decreases as the seat portion moves forwardly.
  • The chair may include stop means for limiting movement of the seat portion relative to the base. Resilient means for biassing the seat portion to its forward position may also be provided. The resilient means may be adjustable to adjust the biassing force and may be lockable to lock the chair in any desired position. Alternatively, the locking means may be provided separately from the biassing means.
  • An embodiment according to the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
    • Figure 1 is a diagrammatic side elevation of an embodiment of a chair in accordance with the present invention, showing the chair in two positions; and
    • Figure 2 is a diagrammatic front elevation of the chair of Figure 1, showing the chair in the position shown in solid lines in Figure 1.
  • The chair shown in the drawings comprises a base 1, a seat 2, comprising a seat portion 3 and a back rest portion 4, and adjustable mounting means 5 for adjustably mounting the seat 2 on the base 1 and permitting the seat to move between the positions shown in full and broken lines in Figure 1.
  • In Figures 1 and 2, the seat and back rest portions 3,4 are shown diagrammatically and in use of the invention may comprise a load bearing part, which may be in the form of a frame work or, as shown, a shell, which may for example be moulded. The load bearing part may be cushioned and upholstered.
  • As shown, the base 1 comprises an upright 6 which is supported on the ground by any suitable means. As shown, upright 6 is supported by a plurality of generally radially extending legs 7 provided at their ends with castors or glides 8. Upright 6 may be rotatable and adjustable in length relative to legs 7. Cantilevered from the upper end of upright 6 is a pair of fixed support members 9 between which and the seat portion 3 the adjustable mounting means 5 are connected. It will be appreciated that the base 1 may take other conventional forms. For example, it may comprise four legs interconnected by a framework which provides one or two fixed support members equivalent to members 9.
  • The adjustable mounting means 5 comprise two support members 10,11, each of which is connected to the member 9 of the base and to the seat portion 3 for pivotal movement relative thereto ab out generally horizontal axes 12,13,14 and 15 which extend transversely of the seat portion 3. Support members 10,11 form the opposite sides of a quadrilateral linkage of which the other sides are provided by base support member 9 and seat portion 3 and which, as shown, extends generally centrally between the front and rear of the seat portion 3. The distances between axes 12 and 13, 13 and 15, 15 and 14, and 14 and 12 are arranged so that seat portion 3 will, as shown in Figure 1, move relative to base 1 between a lower rearward position, shown in full lines in Figure 1 in which the seat portion may be generally rearwardly inclined, and a raised forward position, shown in broken lines in Figure 1, in which the seat portion may be substantially horizontal or slightly forwardly inclined.
  • The back rest portion 4 is advantageously connected for movement with the rearward support member 11 so that it has a fixed orientation relative to member 11 and as a consequence pivots relative to seat portion 3 as seat portion 3 is moved relative to base 1. The quadrilateral linkage is designed so that, as seat portion 3 moves from its rear ward position to its forward position, the angle between the seat portion and the back rest portion decreases. When the seat portion is in its forward position, the back rest portion may be generally vertical.
  • As shown, resilient biassing means are provided, for biassing the seat portion to its forward position and counterbalancing the weight of the user so that the seat portion will move to its rearward position under the control of the user and specifically by the user repositioning himself in the chair. As shown, the resilient biassing means 16 acts generally between axes 13 and 14 of the quadrilateral linkage, and is in the form of a "gas spring", one end of which is pivotally connected to the seat portion 3 in the region of axis 14 and the other end of which is pivotally connected to upright 6 with the line of action of the "gas spring" approximately passing through axis 13. The gas spring may be arranged to provide an adjustable bias, for adjustment by the user depending on the user's weight, and it may also be provided with a manually operable lock so that the user can lock the seat portion in a required position relative to the base. The gas spring 16 incorporates limits on its extension and contraction and these provide stops for limiting movement of the seat portion 3 relative to the base.
  • In the embodiment shown, support members 10 and 11 are provided at each end with transversely projecting portions 10a,11a, the ends of which have blind bores for receiving stub shafts about which the members 10,11 pivot and which define the axes 12 to 15. At the lower ends of the members 10,11, the stub shafts are mounted in base members 9 with the members 10,11 extending from between the members 9. At their upper ends, the stub shafts are mounted in a similar pair of support members 17 which are fixed to the underside of the seat portion 3.
  • It will be appreciated that the biassing means may take other forms. For example, they may be provided by an adjustable torsion spring or bar incorporated in one or more of the pivot axes 12 to 15 of the quadrilateral linkage, or a tension or compression spring acting between opposed pairs of axes of the linkage. Advantageously, the biassing means are adjustable to permit adjustment to take account of varying user weights. Additionally, stop means for limiting movement of the seat portion relative to the base may be, as shown, provided by the biassing means, or may be provided separately. For example, components of the quadrilateral linkage may be brought into abutment in the limit positions of the linkage. Additionally, locking means, where provided, for locking the seat portion in a desired position relative to the base portion, may, as shown be incorporated in the biassing means or may be provided separately, for example in the form of a mechanical lock acting on one or more of the piv ot axes.
  • It will be appreciated from the foregoing that numerous modifications may be made to the dimensions of the quadrilateral linkage, in its positioning and orientation relative to the base 1, and in relation to the numbers of support members 10,11 which are used in the linkage.
  • In relation to the positioning and orientation of the linkage relative to the base 1, in a modification, both of axes 12 and 13 are positioned further to the rear of the chair with the members 10,11 extending forwardly therefrom to their pivotal connections with the seat portion, member 11 being longer than member 10. With such a modification, it is not possible to connect the back rest portion with one of the links 10,11 and it therefore has a fixed position relative to the seat portion.
  • In relation to the numbers of members 10,11 provided, it will be appreciated that members 10,11 may be duplicated and extend to either side of single members 9,17. In a further modification, member 11 may be replaced by a pair of members extending between pivot axes 13 and 15 but each shaped to form a loop between these pivot axes and which serve as the arm rests of the chair.

Claims (14)

1. A chair comprising a base (1), a seat (2) and means (5) adjustably mounting the seat on the base, the seat comprising a seat portion (3) and a backrest portion (4) and the adjustable mounting means (5) comprising a first support member (10) and a second support member (11), each support member being pivotally connected to the base (1) and the seat portion (3) for pivotal movement relative to the base and the seat portion about generally horizontal axes (12,13,14,15) extending transversely of the seat portion (3), the support members forming opposite sides of a quadrilateral linkage, the other sides of which are provided by the base (1) and seat portion (3), which extends generally between the front and rear of the seat portion and which permits movement of the seat portion relative to the base.
2. A chair as claimed in claim 1, wherein the quadrilateral linkage is arranged to permit the seat portion (3) to move relative to the base (1) between a rearward lower position and a forward upper position.
3. A chair as claimed in either claim 1 or claim 2, wherein the back rest portion (4) is connected for movement with one of the support members (11) so as to move relative to the seat portion (3) with movement of the seat portion relative to the base (1).
4. A chair as claimed in claim 3, wherein the quadrilateral linkage is arranged to cause the angle between the back rest portion (4) and the seat portion (3) to decrease as the seat portion moves from its rearward position to its forward position.
5. A chair as claimed in any one of the preceding claims, including stop means for limiting movement of the seat portion (3) relative to the base (1).
6. A chair as claimed in any one of the preceding claims, including biassing means for biassing the seat portion to its forward position and for permitting the seat portion to move to its rearward position in use.
7. A chair as claimed in claim 6, wherein the biassing means act on one of the pivotal connections of the support members (10,11).
8. A chair as claimed in either claim 6 or 7, wherein the biassing means act between an opposite pair of the pivotal connections of the support members (10,11).
9. A chair as claimed in any one of the preceding claims, including locking means for fixing the seat portion (3) relative to the base (1) in a desired position.
10. A chair as claimed in claim 9, wherein the locking means are associated with the biassing means.
11. A chair as claimed in any one of the preceding claims, wherein the biassing means comprises a member (16) having a variable length which is pivotally connected to the seating portion (3) in the region of the forward-most pivo t axis (14) of the forward pivotal support member (10) on the seating portion (3) and to the base (1) in the region of the rear-most pivot axis (13) of the rear pivotal support member (11) on the base (1).
12. A chair as claimed in claim 11, wherein the biassing member (16) includes releasable locking means for preventing variation in the length thereof.
13. A chair as claimed in any one of the preceding claims, wherein the distance between the pivotal axes (13,15) of the rearward support member (11) is longer than the distance between the pivot axes (12,14) of the forward connecting member (10).
14. A chair as claimed in claim 13, wherein the pivotal support members (10,11) extend rearwardly from their pivotal connections with the base (1) to their pivotal connections with the seat portion (3).
EP19870305331 1986-06-16 1987-06-16 Improvements in and relating to adjustable chairs Expired EP0250207B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868614651A GB8614651D0 (en) 1986-06-16 1986-06-16 Chair adjustment mechanism
GB8614651 1986-06-16

Publications (3)

Publication Number Publication Date
EP0250207A2 true EP0250207A2 (en) 1987-12-23
EP0250207A3 EP0250207A3 (en) 1988-04-27
EP0250207B1 EP0250207B1 (en) 1992-06-10

Family

ID=10599534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870305331 Expired EP0250207B1 (en) 1986-06-16 1987-06-16 Improvements in and relating to adjustable chairs

Country Status (4)

Country Link
EP (1) EP0250207B1 (en)
DE (1) DE3779696T2 (en)
ES (1) ES2033312T3 (en)
GB (1) GB8614651D0 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3737492A1 (en) * 1987-11-05 1989-05-18 Wilkhahn Wilkening & Hahne Chair
DE3737491A1 (en) * 1987-11-05 1989-05-18 Wilkhahn Wilkening & Hahne Chair
DE4409098A1 (en) * 1994-03-17 1995-09-21 Froescher Gmbh & Co Kg Incline adjustable chair
EP0645976A4 (en) * 1992-06-15 1996-05-22 Miller Herman Inc Office chair.
EP1060694A1 (en) 1999-06-17 2000-12-20 König + Neurath AG Chair, particularly office-chair
DE10064204A1 (en) * 2000-12-22 2002-07-04 Wilkhahn Wilkening & Hahne Chair has slide attached to seat front which moves in inclined guide and curved levers attached to sides of back rest and rear of seat
US6945602B2 (en) 2003-12-18 2005-09-20 Haworth, Inc. Tilt control mechanism for chair
US7721399B2 (en) 2005-10-25 2010-05-25 Global Total Office An Ontario Limited Partnership Having Global Upholstery Co.Inc. As Its General Partner Method for replacing a telescoping cylinder in a reconfigurable chair
US8157326B2 (en) 2006-05-11 2012-04-17 Tech-Nicon International Management Services Limited Seat

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01297009A (en) * 1987-12-28 1989-11-30 Isao Hosoe Seat surface for human engineering chair
DE3837727A1 (en) * 1988-11-07 1990-05-10 Link Wilhelm Kg CHAIR, ESPECIALLY OFFICE CHAIR
GB2293312B (en) * 1994-08-03 1999-01-20 Crispin Hall Variable ratio synchronised chair movement
US5899530A (en) * 1995-08-23 1999-05-04 Global Upholstery Company Control mechanism for a chair
DE19728838C1 (en) 1997-07-05 1999-01-14 Koenig & Neurath Ag Chair, especially office chair
US6644741B2 (en) 2001-09-20 2003-11-11 Haworth, Inc. Chair
US20030132653A1 (en) * 2001-10-18 2003-07-17 Doug Thole Tension control mechanism for a chair

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461472A1 (en) * 1979-07-23 1981-02-06 Drabert Soehne HEADQUARTERS, IN PARTICULAR HEADQUARTERS FOR CONSULTING DATA VIEWING DEVICES
US4502729A (en) * 1981-08-19 1985-03-05 Giroflex Entwicklungs Ag Chair, especially a reclining chair

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2461472A1 (en) * 1979-07-23 1981-02-06 Drabert Soehne HEADQUARTERS, IN PARTICULAR HEADQUARTERS FOR CONSULTING DATA VIEWING DEVICES
US4502729A (en) * 1981-08-19 1985-03-05 Giroflex Entwicklungs Ag Chair, especially a reclining chair

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3737492A1 (en) * 1987-11-05 1989-05-18 Wilkhahn Wilkening & Hahne Chair
DE3737491A1 (en) * 1987-11-05 1989-05-18 Wilkhahn Wilkening & Hahne Chair
DE3737491C2 (en) * 1987-11-05 2003-03-20 Wilkhahn Wilkening & Hahne chair
DE3737492C2 (en) * 1987-11-05 2003-03-27 Wilkhahn Wilkening & Hahne Chair with four swivel joints
EP0645976A4 (en) * 1992-06-15 1996-05-22 Miller Herman Inc Office chair.
DE4409098A1 (en) * 1994-03-17 1995-09-21 Froescher Gmbh & Co Kg Incline adjustable chair
EP1060694A1 (en) 1999-06-17 2000-12-20 König + Neurath AG Chair, particularly office-chair
DE10064204A1 (en) * 2000-12-22 2002-07-04 Wilkhahn Wilkening & Hahne Chair has slide attached to seat front which moves in inclined guide and curved levers attached to sides of back rest and rear of seat
US6945602B2 (en) 2003-12-18 2005-09-20 Haworth, Inc. Tilt control mechanism for chair
US7721399B2 (en) 2005-10-25 2010-05-25 Global Total Office An Ontario Limited Partnership Having Global Upholstery Co.Inc. As Its General Partner Method for replacing a telescoping cylinder in a reconfigurable chair
US8157326B2 (en) 2006-05-11 2012-04-17 Tech-Nicon International Management Services Limited Seat

Also Published As

Publication number Publication date
ES2033312T3 (en) 1993-03-16
EP0250207B1 (en) 1992-06-10
DE3779696D1 (en) 1992-07-16
DE3779696T2 (en) 1993-01-21
GB8614651D0 (en) 1986-07-23
EP0250207A3 (en) 1988-04-27

Similar Documents

Publication Publication Date Title
EP0250207A2 (en) Improvements in and relating to adjustable chairs
US4979778A (en) Synchrotilt chair
US5931531A (en) Chair having adjustable synchronous tilting
US5536067A (en) Chair
US5054857A (en) Convertible chair
US10058180B2 (en) Chair, in particular office chair
AU617070B2 (en) Reclining chair
EP1100357B1 (en) A chair
US4411469A (en) Chair, particularly a data display chair
JP3255592B2 (en) Furniture components for stools and connection reinforcements with interlocking backrest and seat adjustment
US6969116B2 (en) Chair with backward and forward passive tilt capabilities
US20030230918A1 (en) Dynamically balanced seat assembly having independently and arcuately movable seat and backrest and method
EP1410738A1 (en) Chair with movable seat and backrest
CA2302063C (en) Ergonomic chair
EP0283170A1 (en) Improvements in pedestal chairs
EP0284272A1 (en) Improvements in and relating to chairs
EP0941679A2 (en) Rocking and gliding mechanism
EP0271962A2 (en) A point-synchronized adjustment device for office chairs
US2927630A (en) Adjustable reclining chairs
US5127705A (en) Multifunction and multiposition chair
WO1995025452A1 (en) A chair with a reclinable backrest
JP3046348B2 (en) Torsion spring and adjustable mounting mechanism for chair using torsion spring
CA2017585A1 (en) Device for adjustably inclining, in conjugate manner, the backrest and seat of an armchair
EP0368471A1 (en) Pedestal chair
GB2325152A (en) Improvements relating to chairs

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RBV Designated contracting states (corrected)

Designated state(s): BE DE ES FR GB IT NL SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE DE ES FR GB IT NL SE

17P Request for examination filed

Effective date: 19880907

17Q First examination report despatched

Effective date: 19891116

DIN1 Information on inventor provided before grant (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MINES AND WEST LIMITED

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MINES & WEST BUSINESS FURNITURE LIMITED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE ES FR GB IT NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920610

Ref country code: NL

Effective date: 19920610

Ref country code: BE

Effective date: 19920610

ITF It: translation for a ep patent filed

Owner name: JACOBACCI CASETTA & PERANI S.P.A.

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19920617

REF Corresponds to:

Ref document number: 3779696

Country of ref document: DE

Date of ref document: 19920716

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920910

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930302

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2033312

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930430

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920910

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19991007

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050616

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19920630