US20080012412A1 - Chair with seat and backrest with synchronised movement - Google Patents
Chair with seat and backrest with synchronised movement Download PDFInfo
- Publication number
- US20080012412A1 US20080012412A1 US11/772,967 US77296707A US2008012412A1 US 20080012412 A1 US20080012412 A1 US 20080012412A1 US 77296707 A US77296707 A US 77296707A US 2008012412 A1 US2008012412 A1 US 2008012412A1
- Authority
- US
- United States
- Prior art keywords
- backrest
- seat
- support base
- support structure
- chair
- 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
Links
- 230000001360 synchronised effect Effects 0.000 title description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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
- A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
- A47C1/03233—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of a rack-and-pinion or like gearing mechanism
-
- 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
- A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
- A47C1/03238—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of peg-and-notch or pawl-and-ratchet mechanism
-
- 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
- A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
Definitions
- the present invention relates to a chair with seat and backrest with synchronised movement.
- the invention relates to a chair comprising a support base, a seat that is movable relative to the support base between a lowered position and a raised position, and a backrest articulated to the support base around a transverse axis and oscillating around said axis between a position of maximum forward inclination and a position of maximum backward inclination, and in which the seat and the backrest are mutually connected in such a way that when the backrest is in the position of maximum forward inclination, the seat is in lowered position and when the backrest is in the position of maximum backward inclination, the seat is in the raised position.
- Chairs of the type defined above are known in the field as “weight-activated chairs”.
- the weight of the user tends to push the seat downward and tends to maintain the backrest in the position of maximum forward inclination.
- the backward thrust is contrasted by the weight of the user bearing down on the seat.
- Chairs of this kind are normally provided with an elastic device which tends to thrust the seat towards the lowered position and the backrest towards the position of maximum forward inclination, so the backwards thrust on the backrest has to overcome both the weight bearing down on the seat and the elastic force which tends to maintain the backrest in the position of maximum forward inclination.
- the object of the present invention is to provide a chair of the type indicated above having a simpler, more economical and more compact structure than prior art chairs.
- said object is achieved by a chair having the characteristics set out in claim 1 .
- FIG. 1 is a partial perspective view of a chair according to the present invention
- FIG. 2 is an exploded perspective view of the part of chair shown in FIG. 1 ,
- FIGS. 3 and 4 are longitudinal sections according to the line III-III of FIG. 1 , showing the chair according to the invention in two positions,
- FIG. 5 is a partial cross section according to the line V-V of FIG. 1 .
- FIGS. 6 and 7 are bottom plan views of the chair according to the invention.
- the reference number 10 designates a chair according to the present invention.
- the chair 10 comprises a fixed support base 12 , a seat 14 and a backrest 16 .
- the support base 12 comprises a transverse element 18 with a channel shape, provided at its lateral ends with two flanges 20 extending upwards.
- the base 12 is connected to a vertical central upright (not shown) with adjustable height, projecting upwards from a support formed by a plurality of radial arms provided at their outer ends with casters, according to an arrangement that is widely known in the office chair industry.
- the backrest 16 comprises a support structure 22 that bears a shaped panel 24 to support the occupant's back.
- the support structure 22 of the backrest 16 has two lateral sections 26 that extend in the longitudinal direction.
- the two lateral sections 26 are articulated to the flanges 20 of the support base 12 around a transverse horizontal axis 28 .
- the two lateral sections 26 of the backrest 16 are provided with transverse holes 30 with mutually aligned axes, which are connected by means of trunnions (not shown) to corresponding holes 32 provided at the top ends of the flanges 20 of the support base 12 .
- the two lateral sections 26 of the backrest 16 are provided with respective connecting portions 34 which extend forward relative to the articulation axis 28 .
- the connecting portions 34 are provided at their front ends with transverse holes 36 with mutually aligned axes.
- the backrest 14 comprises a support structure 38 and a panel 40 .
- the support structure 38 in turn comprises a transverse element 42 and two longitudinal elements 44 fastened to the transverse element 42 .
- the two longitudinal elements 44 have respective longitudinal guides engaged by blocks 46 fastened to the lower part of the panel 40 .
- This arrangement enables to adjust the position of the panel 40 in the longitudinal direction relative to the support structure 38 .
- One of the two blocks 46 is provided with an arresting device that allows to lock the panel 40 in a pre-selected position, disengageable by means of a lever 48 .
- the transverse element 42 of the support structure of the backrest 38 is provided at its lateral ends with two vertical arms 50 that are fixed relative to the transverse element 42 .
- the two arms 50 are provided with respective holes with transverse axis 52 .
- the vertical arms 50 of the transverse element 42 are articulated to the connecting portions 34 of the backrest 16 by means of two pivot pins 54 , each of which engages two aligned holes 36 , 52 .
- the pivot pins 54 achieve an articulated connection between the transverse element 42 of the support structure of the backrest 38 and the support structure of the backrest 22 , around an axis designated with the reference 56 .
- the articulation axis 56 is parallel and displaced forward relative to the articulation axis 28 between the backrest 16 and the support base 12 .
- the support structure of the backrest 38 is connected to the support base 12 by means of two rocking levers 58 .
- Each rocking lever 58 has a first end articulated to the support base 12 and a second end articulated to the support structure of the backrest 38 . More specifically, the second end of each lever 58 is articulated to a respective longitudinal element 44 of the support structure of the backrest 38 .
- the axes of articulation of the levers 58 are respectively designated by the references 60 and 62 . Said axes are mutually parallel and they are parallel to the axes of articulation 28 and 56 defined previously. In the example shown in the figures, two levers 58 are provided, but a single lever 58 could also be sufficient to achieve the same result.
- the support base 12 bears an elastic element constituted by a flexing bar 64 .
- the flexing bar 64 extends in the transverse direction, parallel to the axes of articulation 28 , 56 .
- the ends of the flexing bar 64 extend in the transverse direction beyond the transverse element 42 of the support structure of the seat 38 . Said ends engage respective holes of two vertical levers 66 .
- the top ends of the vertical levers 66 are articulated to the connecting portions 34 of the backrest 16 .
- the top ends of the levers 66 are articulated to the connecting portions 34 by means of the same pivot pins 54 that connect in articulated fashion the connecting portions 34 of the backrest 16 to the vertical flanges 50 of the support structure of the backrest 38 .
- the flexing bar 34 can be constituted by a metal rod with any cross section, e.g. circular, square, rectangular, etc.
- the flexing bar 64 could also be formed as a leaf spring, with a plurality of mutually fastened superposed strips. A central part of the flexing bar 64 is fastened to the support base 12 whilst the lateral portions of the flexing bar 64 can deform elastically relative to the fixed central portion.
- the support base 12 comprises two fixed pivot pins 68 and two movable pivot pins 70 .
- the pivot pins 68 , 70 are provided with through holes with transverse axis through which extends the flexing bar 64 .
- the holes of the pivot pins 68 , 70 are mutually aligned and the movable pivot pins 70 are positioned exteriorly in the transverse direction relative to the fixed pivot pins 68 .
- the movable pivot pins 70 extend through respective transverse slots 72 of the support base 12 .
- the movable pivot pins 70 engage with play the flexing bar 64 and can be displaced relative to the support base 12 by means of an adjustment mechanism that enables to move the pivot pins 70 jointly.
- the displacement of the pivot pins 70 varies the free inflexion length of the lateral ends of the bar 64 . Consequently, displacing the movable pivot pins 70 varies the stiffness of the flexing bar 64 .
- FIGS. 6 and 7 show an example of the adjustment mechanism that controls the movement of the movable pivot pins 70 .
- Each movable pivot pin 70 is fastened to a respective adjustment rod 74 .
- the two rods 74 are positioned on the lower surface of the support base 12 and have respective racks 76 that mesh with a same gearwheel 78 freely rotatable around a vertical axis.
- One of the two adjustment rods 74 is provided with an actuation grip 80 . If the grip 80 is moved in the transverse direction, the two rods 74 are jointly moved in the direction indicated by the arrows 82 in FIGS. 6 and 7 .
- FIG. 6 shows the condition in which the pivot pins 70 are in the outermost position, which corresponds to the maximum stiffness of the flexing bar 64 .
- FIG. 7 shows the condition in which the pivot pins 70 are in the innermost position, which corresponds to the maximum flexibility (or minimum stiffness) of the flexing bar 74 .
- FIGS. 3 and 4 show the two extreme positions of the chair according to the present invention.
- the flexing bar 64 is in non-deformed position.
- the backrest 16 is in the position of maximum forward inclination and the seat 14 is in its fully lowered position.
- the chair assumes this configuration when it is not occupied by a user or when the user sits on the seat 14 but exerts no backwards force on the backrest 16 .
- FIG. 4 shows the backrest 16 in the configuration of maximum backward inclination.
- the flexing bar 64 is in the condition of maximum inflexion and the seat 14 is in the fully raised position. This is the configuration assumed by the chair when the user bears backwards on the backrest with all his/her weight.
- the rearward thrust imparted by the user is contrasted by the weight of the user on the seat 14 and by the return force of the flexing bar 64 .
- connection between the seat 14 and the support base 12 is achieved by means of the rocking levers 58 and by means of the connecting portions 34 .
- the geometry of this connection is such that the seat moves forward during its motion from the lowered position to the raised position and, simultaneously, it changes its inclination relative to a horizontal plane. This movement of the backrest enables to obtain ideal conditions from the ergonomic viewpoint in any position of the chair.
- a flexing bar 64 as an elastic element to return the backrest 16 in the position of maximum forward inclination enables considerably to reduce the dimensions of the support base 12 .
- the mechanism for adjusting the stiffness of the elastic organ also becomes particularly simple.
- the ends of the flexing bar can be connected to downward extensions of the vertical arms 50 .
Abstract
Chair comprising a support base, a seat including a support structure that is movable relative to the support base between a lowered position and a raised position, and a backrest having a support structure articulated to the support base around a transverse axis and oscillating around said axis between a position of maximum forward inclination and a position of maximum backward inclination, in which the seat and the backrest are mutually connected in such a way that when the backrest is in the position of maximum forward inclination the seat is in the lowered position and when the backrest is in the position of maximum backward inclination the seat is in the raised position. The support structure of the seat is connected to the support base by means of at least one rocking lever articulated to the support base and to the support structure of the backrest around two mutually parallel transverse axes. The support structure of the backrest comprises two lateral sections each of which has a connecting portion that extends beyond the axis of articulation of the backrest to the support base, the connecting portions being articulated to the support structure of the seat around a transverse axis displaced forward relative to the axis of articulation of the backrest.
Description
- This application claims benefit of European patent application number 06425482.4, filed Jul. 11, 2006, which is herein incorporated by reference.
- 1. Field of the Invention
- The present invention relates to a chair with seat and backrest with synchronised movement.
- More specifically, the invention relates to a chair comprising a support base, a seat that is movable relative to the support base between a lowered position and a raised position, and a backrest articulated to the support base around a transverse axis and oscillating around said axis between a position of maximum forward inclination and a position of maximum backward inclination, and in which the seat and the backrest are mutually connected in such a way that when the backrest is in the position of maximum forward inclination, the seat is in lowered position and when the backrest is in the position of maximum backward inclination, the seat is in the raised position.
- 2. Description of the Related Art
- Chairs of the type defined above are known in the field as “weight-activated chairs”. The weight of the user tends to push the seat downward and tends to maintain the backrest in the position of maximum forward inclination. When the user bears the weight backwards on the backrest, the backward thrust is contrasted by the weight of the user bearing down on the seat. Chairs of this kind are normally provided with an elastic device which tends to thrust the seat towards the lowered position and the backrest towards the position of maximum forward inclination, so the backwards thrust on the backrest has to overcome both the weight bearing down on the seat and the elastic force which tends to maintain the backrest in the position of maximum forward inclination.
- The object of the present invention is to provide a chair of the type indicated above having a simpler, more economical and more compact structure than prior art chairs.
- According to the present invention, said object is achieved by a chair having the characteristics set out in claim 1.
- The chair according to the present invention shall now be described in detail with reference to the accompanying drawings, provided purely by way of non limiting example, in which:
-
FIG. 1 is a partial perspective view of a chair according to the present invention, -
FIG. 2 is an exploded perspective view of the part of chair shown inFIG. 1 , -
FIGS. 3 and 4 are longitudinal sections according to the line III-III ofFIG. 1 , showing the chair according to the invention in two positions, -
FIG. 5 is a partial cross section according to the line V-V ofFIG. 1 , and -
FIGS. 6 and 7 are bottom plan views of the chair according to the invention. - With reference to
FIGS. 1 and 2 , thereference number 10 designates a chair according to the present invention. Thechair 10 comprises afixed support base 12, aseat 14 and abackrest 16. - The
support base 12 comprises atransverse element 18 with a channel shape, provided at its lateral ends with twoflanges 20 extending upwards. Thebase 12 is connected to a vertical central upright (not shown) with adjustable height, projecting upwards from a support formed by a plurality of radial arms provided at their outer ends with casters, according to an arrangement that is widely known in the office chair industry. - The
backrest 16 comprises asupport structure 22 that bears ashaped panel 24 to support the occupant's back. Thesupport structure 22 of thebackrest 16 has twolateral sections 26 that extend in the longitudinal direction. The twolateral sections 26 are articulated to theflanges 20 of thesupport base 12 around a transversehorizontal axis 28. The twolateral sections 26 of thebackrest 16 are provided withtransverse holes 30 with mutually aligned axes, which are connected by means of trunnions (not shown) to correspondingholes 32 provided at the top ends of theflanges 20 of thesupport base 12. The twolateral sections 26 of thebackrest 16 are provided with respective connectingportions 34 which extend forward relative to thearticulation axis 28. The connectingportions 34 are provided at their front ends withtransverse holes 36 with mutually aligned axes. - With reference still to
FIGS. 1 and 2 , thebackrest 14 comprises asupport structure 38 and apanel 40. Thesupport structure 38 in turn comprises atransverse element 42 and twolongitudinal elements 44 fastened to thetransverse element 42. The twolongitudinal elements 44 have respective longitudinal guides engaged byblocks 46 fastened to the lower part of thepanel 40. This arrangement enables to adjust the position of thepanel 40 in the longitudinal direction relative to thesupport structure 38. One of the twoblocks 46 is provided with an arresting device that allows to lock thepanel 40 in a pre-selected position, disengageable by means of alever 48. - The
transverse element 42 of the support structure of thebackrest 38 is provided at its lateral ends with twovertical arms 50 that are fixed relative to thetransverse element 42. The twoarms 50 are provided with respective holes withtransverse axis 52. Thevertical arms 50 of thetransverse element 42 are articulated to the connectingportions 34 of thebackrest 16 by means of twopivot pins 54, each of which engages two alignedholes pivot pins 54 achieve an articulated connection between thetransverse element 42 of the support structure of thebackrest 38 and the support structure of thebackrest 22, around an axis designated with thereference 56. Thearticulation axis 56 is parallel and displaced forward relative to thearticulation axis 28 between thebackrest 16 and thesupport base 12. - The support structure of the
backrest 38 is connected to thesupport base 12 by means of tworocking levers 58. Each rockinglever 58 has a first end articulated to thesupport base 12 and a second end articulated to the support structure of thebackrest 38. More specifically, the second end of eachlever 58 is articulated to a respectivelongitudinal element 44 of the support structure of thebackrest 38. The axes of articulation of thelevers 58 are respectively designated by thereferences articulation levers 58 are provided, but asingle lever 58 could also be sufficient to achieve the same result. - With reference to the
FIGS. 2 and 5 , thesupport base 12 bears an elastic element constituted by aflexing bar 64. Theflexing bar 64 extends in the transverse direction, parallel to the axes ofarticulation flexing bar 64 extend in the transverse direction beyond thetransverse element 42 of the support structure of theseat 38. Said ends engage respective holes of twovertical levers 66. The top ends of thevertical levers 66 are articulated to the connectingportions 34 of thebackrest 16. In the embodiment illustrated in the figures, the top ends of thelevers 66 are articulated to the connectingportions 34 by means of thesame pivot pins 54 that connect in articulated fashion the connectingportions 34 of thebackrest 16 to thevertical flanges 50 of the support structure of thebackrest 38. Theflexing bar 34 can be constituted by a metal rod with any cross section, e.g. circular, square, rectangular, etc. Theflexing bar 64 could also be formed as a leaf spring, with a plurality of mutually fastened superposed strips. A central part of theflexing bar 64 is fastened to thesupport base 12 whilst the lateral portions of theflexing bar 64 can deform elastically relative to the fixed central portion. - With reference to
FIGS. 2 and 5 , thesupport base 12 comprises two fixedpivot pins 68 and twomovable pivot pins 70. Thepivot pins flexing bar 64. The holes of thepivot pins movable pivot pins 70 are positioned exteriorly in the transverse direction relative to the fixedpivot pins 68. Themovable pivot pins 70 extend through respectivetransverse slots 72 of thesupport base 12. Themovable pivot pins 70 engage with play theflexing bar 64 and can be displaced relative to thesupport base 12 by means of an adjustment mechanism that enables to move thepivot pins 70 jointly. The displacement of thepivot pins 70 varies the free inflexion length of the lateral ends of thebar 64. Consequently, displacing the movable pivot pins 70 varies the stiffness of the flexingbar 64. -
FIGS. 6 and 7 show an example of the adjustment mechanism that controls the movement of the movable pivot pins 70. Eachmovable pivot pin 70 is fastened to arespective adjustment rod 74. The tworods 74 are positioned on the lower surface of thesupport base 12 and haverespective racks 76 that mesh with asame gearwheel 78 freely rotatable around a vertical axis. One of the twoadjustment rods 74 is provided with anactuation grip 80. If thegrip 80 is moved in the transverse direction, the tworods 74 are jointly moved in the direction indicated by thearrows 82 inFIGS. 6 and 7 .FIG. 6 shows the condition in which the pivot pins 70 are in the outermost position, which corresponds to the maximum stiffness of the flexingbar 64.FIG. 7 shows the condition in which the pivot pins 70 are in the innermost position, which corresponds to the maximum flexibility (or minimum stiffness) of the flexingbar 74. -
FIGS. 3 and 4 show the two extreme positions of the chair according to the present invention. In the configuration shown inFIG. 3 , the flexingbar 64 is in non-deformed position. Thebackrest 16 is in the position of maximum forward inclination and theseat 14 is in its fully lowered position. The chair assumes this configuration when it is not occupied by a user or when the user sits on theseat 14 but exerts no backwards force on thebackrest 16. -
FIG. 4 shows thebackrest 16 in the configuration of maximum backward inclination. The flexingbar 64 is in the condition of maximum inflexion and theseat 14 is in the fully raised position. This is the configuration assumed by the chair when the user bears backwards on the backrest with all his/her weight. The rearward thrust imparted by the user is contrasted by the weight of the user on theseat 14 and by the return force of the flexingbar 64. - The connection between the
seat 14 and thesupport base 12 is achieved by means of the rocking levers 58 and by means of the connectingportions 34. The geometry of this connection is such that the seat moves forward during its motion from the lowered position to the raised position and, simultaneously, it changes its inclination relative to a horizontal plane. This movement of the backrest enables to obtain ideal conditions from the ergonomic viewpoint in any position of the chair. - The use of a flexing
bar 64 as an elastic element to return thebackrest 16 in the position of maximum forward inclination enables considerably to reduce the dimensions of thesupport base 12. With an elastic organ constituted by a flexing bar, the mechanism for adjusting the stiffness of the elastic organ also becomes particularly simple. - In a possible variant, the ends of the flexing bar can be connected to downward extensions of the
vertical arms 50. - While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. Chair comprising:
a support base,
a seat including a support structure that is movable relative to the support base between a lowered position and a raised position, and
a backrest having support structure articulated to the support base around a transverse axis and oscillating around said axis between a position of maximum forward inclination and a position of maximum backward inclination,
in which the seat and the backrest are mutually connected in such a way that when the backrest is in the position of maximum forward inclination the seat is in the lowered position and when the backrest is in the position of maximum backward inclination the seat is in the raised position,
wherein:
the support structure of the seat is connected to the support base by means of at least one rocking lever articulated to the support base and to the support structure of the backrest around two mutually parallel transverse axes,
the support structure of the backrest comprises two lateral sections each of which has a connecting portion that extends beyond the axis of articulation of the backrest to the support base, the connecting portions being articulated to the support structure of the seat around a transverse axis displaced forward relative to the axis of articulation of the backrest.
2. Chair as claimed in claim 1 , wherein it comprises an elastic device tending to thrust the backrest towards its position of maximum forward inclination and the seat towards the lowered position, the elastic device comprising a transverse flexing bar having a central portion that is fixed relative to the support base and two ends connected to said connecting portions of the backrest.
3. Chair as claimed in claim 2 , wherein the flexing bar is connected to the connecting portions of the backrest by means of two vertical levers.
4. Chair as claimed in claim 2 , wherein it comprises a device for adjusting the stiffness of the flexing bar including two movable pivot pins having respective transverse holes, mutually aligned, through which the flexing bar extends.
5. Chair as claimed in claim 4 , wherein the adjustment device comprises two rods fastened to the respective movable pivot pins and provided with respective racks meshing with a same gearwheel.
6. Chair as claimed in claim 1 , wherein the support base comprises two lateral flanges extending upward whereto are articulated said lateral sections of the support structure of the backrest.
7. Chair as claimed in claim 6 , wherein the support structure of the backrest comprises a transverse element provided with two lateral vertical arms whose top ends are articulated to said connecting portions of the backrest.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06425482.4 | 2006-07-11 | ||
EP06425482A EP1878360A1 (en) | 2006-07-11 | 2006-07-11 | Chair with seat and backrest with synchronized movement |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080012412A1 true US20080012412A1 (en) | 2008-01-17 |
Family
ID=37496876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/772,967 Abandoned US20080012412A1 (en) | 2006-07-11 | 2007-07-03 | Chair with seat and backrest with synchronised movement |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080012412A1 (en) |
EP (1) | EP1878360A1 (en) |
JP (1) | JP2008018239A (en) |
CN (1) | CN101103865A (en) |
CA (1) | CA2593292A1 (en) |
MX (1) | MX2007008192A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170052602A1 (en) * | 2014-07-31 | 2017-02-23 | Hewlett-Packard Development Company, L.P. | ION Writing Calibration |
US10178913B2 (en) * | 2013-09-24 | 2019-01-15 | Ue Furniture Co., Ltd. | Chassis of swivel chair |
US20190053626A1 (en) * | 2017-08-16 | 2019-02-21 | Sedus Stoll Ag | Connection Assembly for a Backrest and Office or Conference Chair |
US10231546B2 (en) * | 2017-03-02 | 2019-03-19 | Knoll, Inc. | Chair back tilt mechanism |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUB20159640A1 (en) * | 2015-12-22 | 2017-06-22 | Pro Cord Spa | FOLDING CHAIR |
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US4840426A (en) * | 1987-09-30 | 1989-06-20 | Davis Furniture Industries, Inc. | Office chair |
US4877291A (en) * | 1987-12-14 | 1989-10-31 | Taylor William P | Reclining chair |
US5308145A (en) * | 1992-02-12 | 1994-05-03 | Kimball International Marketing, Inc. | Reclining chair |
US5580127A (en) * | 1993-05-27 | 1996-12-03 | Pro-Cord S.R.L. | Chair with tilting backrest |
US5909923A (en) * | 1997-10-24 | 1999-06-08 | Steelcase Inc. | Chair with novel pivot mounts and method of assembly |
US6609755B2 (en) * | 2001-06-15 | 2003-08-26 | Hon Technology Inc. | Ergonomic chair |
US20030230918A1 (en) * | 2002-06-18 | 2003-12-18 | Hector Serber | Dynamically balanced seat assembly having independently and arcuately movable seat and backrest and method |
US20050146184A1 (en) * | 2003-12-30 | 2005-07-07 | Machael Jay R. | Chair with backward and forward passive tilt capabilities |
US7273253B2 (en) * | 2004-06-09 | 2007-09-25 | Kimball International, Inc. | Chair ride mechanism with tension assembly |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1315528B1 (en) * | 2000-10-18 | 2003-02-18 | Enrico Cioncada | VARIABLE TRIM ARMCHAIR |
-
2006
- 2006-07-11 EP EP06425482A patent/EP1878360A1/en not_active Withdrawn
-
2007
- 2007-07-03 US US11/772,967 patent/US20080012412A1/en not_active Abandoned
- 2007-07-04 MX MX2007008192A patent/MX2007008192A/en not_active Application Discontinuation
- 2007-07-09 JP JP2007179728A patent/JP2008018239A/en active Pending
- 2007-07-11 CN CNA2007101290938A patent/CN101103865A/en active Pending
- 2007-07-11 CA CA002593292A patent/CA2593292A1/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US4840426A (en) * | 1987-09-30 | 1989-06-20 | Davis Furniture Industries, Inc. | Office chair |
US4877291A (en) * | 1987-12-14 | 1989-10-31 | Taylor William P | Reclining chair |
US5308145A (en) * | 1992-02-12 | 1994-05-03 | Kimball International Marketing, Inc. | Reclining chair |
US5580127A (en) * | 1993-05-27 | 1996-12-03 | Pro-Cord S.R.L. | Chair with tilting backrest |
US5909923A (en) * | 1997-10-24 | 1999-06-08 | Steelcase Inc. | Chair with novel pivot mounts and method of assembly |
US6609755B2 (en) * | 2001-06-15 | 2003-08-26 | Hon Technology Inc. | Ergonomic chair |
US20030230918A1 (en) * | 2002-06-18 | 2003-12-18 | Hector Serber | Dynamically balanced seat assembly having independently and arcuately movable seat and backrest and method |
US7234775B2 (en) * | 2002-06-18 | 2007-06-26 | Hector Serber | Dynamically balanced seat assembly having independently and arcuately movable seat and backrest and method |
US20050146184A1 (en) * | 2003-12-30 | 2005-07-07 | Machael Jay R. | Chair with backward and forward passive tilt capabilities |
US6969116B2 (en) * | 2003-12-30 | 2005-11-29 | Hni Technologies Inc. | Chair with backward and forward passive tilt capabilities |
US7273253B2 (en) * | 2004-06-09 | 2007-09-25 | Kimball International, Inc. | Chair ride mechanism with tension assembly |
Cited By (6)
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US10178913B2 (en) * | 2013-09-24 | 2019-01-15 | Ue Furniture Co., Ltd. | Chassis of swivel chair |
US20170052602A1 (en) * | 2014-07-31 | 2017-02-23 | Hewlett-Packard Development Company, L.P. | ION Writing Calibration |
US10231546B2 (en) * | 2017-03-02 | 2019-03-19 | Knoll, Inc. | Chair back tilt mechanism |
US10743667B2 (en) | 2017-03-02 | 2020-08-18 | Knoll, Inc. | Chair back tilt mechanism |
US20190053626A1 (en) * | 2017-08-16 | 2019-02-21 | Sedus Stoll Ag | Connection Assembly for a Backrest and Office or Conference Chair |
US10610023B2 (en) * | 2017-08-16 | 2020-04-07 | Sedus Stoll Ag | Connection assembly for a backrest and office or conference chair |
Also Published As
Publication number | Publication date |
---|---|
CA2593292A1 (en) | 2008-01-11 |
CN101103865A (en) | 2008-01-16 |
JP2008018239A (en) | 2008-01-31 |
MX2007008192A (en) | 2009-01-07 |
EP1878360A1 (en) | 2008-01-16 |
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