EP0490131A1 - Stuhl mit neigbarer Rückenlehne - Google Patents

Stuhl mit neigbarer Rückenlehne Download PDF

Info

Publication number
EP0490131A1
EP0490131A1 EP91119795A EP91119795A EP0490131A1 EP 0490131 A1 EP0490131 A1 EP 0490131A1 EP 91119795 A EP91119795 A EP 91119795A EP 91119795 A EP91119795 A EP 91119795A EP 0490131 A1 EP0490131 A1 EP 0490131A1
Authority
EP
European Patent Office
Prior art keywords
seat
joint
joints
fact
cylindrical
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Withdrawn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
EP91119795A
Other languages
English (en)
French (fr)
Inventor
Luca Marani
Andrea Marani
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.)
M PIU' DI MARANI GIORGIO E C SNC
Original Assignee
M PIU' DI MARANI GIORGIO E C SNC
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 M PIU' DI MARANI GIORGIO E C SNC filed Critical M PIU' DI MARANI GIORGIO E C SNC
Publication of EP0490131A1 publication Critical patent/EP0490131A1/de
Withdrawn legal-status Critical Current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
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • A47C1/03274—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs of torsion type

Definitions

  • the present invention relates to a chair comprising a supporting base, a seat and a back operatively connected to the seat so as to be able to be moved from an upright or rest position to a reclined position.
  • the chair is of the type including a linkage system forming an articulated quadrilateral in which the seat corresponds to a substantially horizontal upper side and the back is secured to a side articulated at one end to said upper side and at the other end to a lower side carried by the said supporting base.
  • a chair of this type is described in EP-A-0 249 584, while in FR-A-2 045 120 there is described a chair in which the seat is supported by an articulated quadrilateral structure the movement of which is controlled by the back through a separate lever system.
  • the articulated quadrilateral is in fact a parallelogram, so that the movement of the seat, consequent to the reclining movement of the back, is a translatory movement, i.e. parallel to itself.
  • the object of the present invention is to provide a chair in which the reclining movement of the back promotes a rearward displacement and lifting of the front portion, and a rearward displacement and lowering of the rear portion of the seat which is operatively connected to the back. This is obtained by providing a linkage system in which the articulated quadrilateral is different from a parallelogram, i.e. at least two opposite sides are not parallel to each other.
  • a chair according to the present invention comprises:
  • reference numeral 1 indicates the seat and 2 indicates the back which are made, for example, from tube lengths bent into U-shape and hinged to each other at their ends by means of equal and aligned cylindrical joints 3-3'.
  • the seat and back are provided with respective stiffening crosspieces 4 and 5 for the purpose specified below.
  • the crosspiece 5 of the back has secured thereto, with symmetrical arrangement, a fork which is formed by a pair of equal projections 6-6' directed downwards, suitably inclined forwards and articulated at their lower ends at joints 7-7' to a fork which is formed, for example, by a pair of arms 8-8' presenting a slight L-shaped profile (Figure 5), projecting from the top portion of a conventional column C supported by a conventional base B.
  • the joints 7-7' are aligned with each other and parallel to joints 3-3'.
  • the joints 7-7' lie on an imaginary vertical plane which may also contain the other joints 3-3' or, as shown in the drawings, said joints 3-3' are located rearwardly with respect to said imaginary vertical plane, so that when the back is reclined rearwards, the rear portion of the seat is caused to move rearwards and to be lowered slightly, but it is never lifted up.
  • the column C carries the joint 9 for a connecting rod 10 which, in turn, is articulated at its other end at joint 11 to the center of the front of seat 1.
  • the joints 9 and 11 are parallel to each other and to the previously mentioned joints.
  • the joint 11 is located at a higher level than the joint 9.
  • the springs 13-13' are preferably of different characteristics. Only one of them is pre-loaded to act on the seat and back in the rest condition of the chair. The other spring will act subsequently, when the back is reclined rearwards and its action is added to the action of the other spring when said back is about to undergo the last part of said rearwards movement.
  • the chair is completed by an abutment member for limiting the rearward movement of its back, comprising, for example, a finger 14 secured centrally of the crosspiece 5, directed downwards and forwards and of such a length as to interfere with the crosspiece 4.
  • abutment member for limiting the rearward movement of its back, comprising, for example, a finger 14 secured centrally of the crosspiece 5, directed downwards and forwards and of such a length as to interfere with the crosspiece 4.
  • the rear portion of the said seat (see, in Figure 5, the joints 3 -3' in the two indicated positions) will be caused to move rearwardly and downwardly, with a slight "diving" movement.
  • the weight of the user's body bearing on the seat and the elastic reaction of one and then of both springs 13-13' counteract the rearwards rotation of the back, partly balancing the force whereby the user can cause said rotation.
  • the imaginary straight line R1 passing through the joint 9 and the joints 3-3' progressively approaches the imaginary stationary straight line R2 passing through said joint 9 and joints 7-7', though it never reaches nor it passes over this latter straight line R2.
  • the maximum rearward rotation of the back is determined by the abutment of the finger 14 against the crosspiece 4 of the seat, as shown in Figure 5 by dash-and-dot lines.
  • the linkage provided by the various joints (3, 7, 9, 11) can be assimilated to an articulated quadrilateral in which at least two opposite sides are not parallel (in the present case, each side is different from the others), so that the rearward movement of the side actuated by the back will promote the simultaneous lifting of one end (front portion) and lowering of the other end (back portion) of the side corresponding to the seat: it is to be made clear that this particular situation is not to be confused with the situation of an articulated parallelogram where (as shown in the prior art) the movement of the side corresponding to the seat will be a translatory movement (i.e. parallel to itself).
  • the embodiment of Figure 6 differs from the just described embodiment in the feature that the seat 1 and the back 2 are of reduced dimensions.
  • the joints 103, 103' (corresponding to joints 3, 3') have been arranged inwards of the joints 107, 107' (corresponding to joints 7, 7').
EP91119795A 1990-12-14 1991-11-21 Stuhl mit neigbarer Rückenlehne Withdrawn EP0490131A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT12561A IT1241914B (it) 1990-12-14 1990-12-14 Sedia o poltrona di tipo operativo, particolarmente per l'ufficio, conschienale ad assetto variabile e bilanciato dal peso corporeo dell' utente che grava sul sedile.
IT1256190 1990-12-14

Publications (1)

Publication Number Publication Date
EP0490131A1 true EP0490131A1 (de) 1992-06-17

Family

ID=11141626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119795A Withdrawn EP0490131A1 (de) 1990-12-14 1991-11-21 Stuhl mit neigbarer Rückenlehne

Country Status (5)

Country Link
EP (1) EP0490131A1 (de)
JP (1) JPH053817A (de)
CA (1) CA2056753A1 (de)
IE (1) IE914006A1 (de)
IT (1) IT1241914B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7048335B2 (en) 2003-06-05 2006-05-23 Steelcase Development Corporation Seating unit with crossbar seat support

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247312A2 (de) * 1986-05-26 1987-12-02 Drabert Söhne GmbH & Co. Stuhl
EP0271600A1 (de) * 1986-12-19 1988-06-22 C.O.M. Cooperativa Operai Mobilieri S.C.R.L. Verstellbarer Stuhl

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0247312A2 (de) * 1986-05-26 1987-12-02 Drabert Söhne GmbH & Co. Stuhl
EP0271600A1 (de) * 1986-12-19 1988-06-22 C.O.M. Cooperativa Operai Mobilieri S.C.R.L. Verstellbarer Stuhl

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7048335B2 (en) 2003-06-05 2006-05-23 Steelcase Development Corporation Seating unit with crossbar seat support

Also Published As

Publication number Publication date
IT9012561A0 (it) 1990-12-14
JPH053817A (ja) 1993-01-14
IE914006A1 (en) 1992-06-17
CA2056753A1 (en) 1992-06-15
IT9012561A1 (it) 1992-06-14
IT1241914B (it) 1994-02-01

Similar Documents

Publication Publication Date Title
US4962962A (en) Piece of seating furniture
US4684173A (en) Chair with rearwardly inclinable seat and back rest carrier
US4226473A (en) Reclining chair
CA1278992C (en) Chair
US5427433A (en) Rocking, gliding chair and mechanism
US5772278A (en) Recliner chair having wall-avoiding linkage arrangement
JP2618637B2 (ja) 背もたれを丁番付けした椅子
US4979778A (en) Synchrotilt chair
US6886888B2 (en) Synchronizing mechanism for correlated seat/backrest motion of an office chair
US5314237A (en) Reclining chair
US6557940B2 (en) Chair assisting rising movements
US20150245713A1 (en) Chair, in particular office chair
US4185869A (en) Two-way wall-avoiding recliner chair
CA2550165A1 (en) Chair with backward and forward passive tilt capabilities
US5080435A (en) Chair
US4880272A (en) Seat furniture
US3371959A (en) Stop means for a recliner chair
US4848841A (en) Sitting device
US4078841A (en) TV chair with double pillow case and two-step ottoman
US4357049A (en) One-way recliner chair
GB2380399A (en) Power operated lift reclining chair
CA1250799A (en) Convertible chair
EP0490131A1 (de) Stuhl mit neigbarer Rückenlehne
US2681691A (en) Reclining chair
WO1995025452A1 (en) A chair with a reclinable backrest

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: A1

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

17P Request for examination filed

Effective date: 19921104

17Q First examination report despatched

Effective date: 19940124

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19940604