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WO2018149931A1 - Chaise - Google Patents

Chaise Download PDF

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Publication number
WO2018149931A1
WO2018149931A1 PCT/EP2018/053817 EP2018053817W WO2018149931A1 WO 2018149931 A1 WO2018149931 A1 WO 2018149931A1 EP 2018053817 W EP2018053817 W EP 2018053817W WO 2018149931 A1 WO2018149931 A1 WO 2018149931A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
backrest
chair
frame
lever arm
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.)
Ceased
Application number
PCT/EP2018/053817
Other languages
English (en)
Inventor
Oliver Deichmann
Blasius Osko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2018149931A1 publication Critical patent/WO2018149931A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

Definitions

  • Embodiments of the present invention relate to a chair with a backrest, in particular to a chair having an inclination resistance of its backrest that depends on a user's load on the seat surface.
  • a movable backrest is particularly important for a chair used for working.
  • the force with which the user weighs on the seat is transferred to the back rest.
  • the power transmission is achieved by a relatively complex mechanical system.
  • an additional power accumulator, such as a spring is also usually required. Accordingly, such chairs are comparatively expensive.
  • the chair includes an elastically deformable seat, a backrest, and a coupling mechanics arranged between the seat and the backrest so that an inclination resistance of the backrest depends on a user's load on the seat, and that the seat is, depending on a user's load on the backrest, upwardly curved and/or at least partially raised.
  • the chair includes an elastically deformable seat, a backrest, and a rigid first coupling element comprising a first lever arm supporting the backrest, and a second lever arm arranged at the seat so that the elastically deformable seat is deformed when a user is leaning back on the backrest.
  • the method includes providing a frame, attaching an elastically deformable seat to the frame, mounting a lever to the frame in an articulated manner, the lever including a first lever arm and a second lever arm, and attaching a backrest to the first lever arm, so that the second lever arm is arranged at the seat, typically at a back side of the seat opposite a seat area of the seat.
  • FIG. 1 shows a schematic side view of a chair when the backrest of the chair is not loaded according to an embodiment
  • FIG. 2 shows a schematic side view of the chair illustrated in Fig. 1 when the backrest is loaded according to an embodiment
  • FIG. 3 shows a schematic front view of the chair illustrated in Fig. 1 when the backrest is not loaded according to an embodiment
  • FIG. 4 shows a schematic front view of the chair illustrated in Fig. 1 when the backrest is loaded according to an embodiment
  • FIGS. 5 and 6 show sections of schematic front views of chair according to embodiments
  • FIGS. 7 and 8 show sections of schematic front views of chair according to embodiments
  • FIGS. 9 and 10 show sections of schematic front views of chair according to embodiments.
  • FIG. 1 1 shows a schematic side view of a chair according to an embodiment.
  • a chair includes an elastically deformable seat, a backrest and a coupling mechanics arranged between the seat and the backrest so that an inclination resistance of the backrest depends on a user's load on the seat, and that the seat is, depending on a user's load on the backrest, upwardly curved and/or at least partially raised.
  • the seat i.e. the seat itself but not a supporting plate or structure, is upwardly curved, more typically upwardly curved and, thus, at least partially raised.
  • the change of curvature may, depending on the elastic properties of the seat, be comparatively small.
  • the change of curvature may even be hardly recognizable by the user.
  • the seat When a user is sitting on a seat area of the seat (in the following also referred to as sitting side and upper side) and leans his back against a support area of the backrest, the seat (upper side as well as back side of the seat) is upwardly curved and at least partially raised, respectively, to an extent increasing with the force exerted by the user on the backrest.
  • the coupling mechanics cause a curvature or a decrease of a radius of curvature (increase of the curvature) of the elastically deformable seat in upward direction. This ensures that the user is raised when the backrest is loaded.
  • the seat (area) is upwardly curved and at least partially raised, respectively, to an extent that depends on a balance between a user's load acting on the seat and a user's load acting on the backrest. [0026] Accordingly, the chair enables an ergonomic sitting position without an additional synchronous mechanics.
  • the chair may even be stackable.
  • the lever mechanism may be provided by a (rigid) first coupling element having a first lever arm to which the backrest is attached, and a second lever arm acting on the seat, in particular from below when the backrest is loaded.
  • An upper portion of the first lever arm may also be a part of the backrest.
  • the lever mechanism may be provided by a (rigid) first coupling element having a first lever arm supporting a support surface (typically provided by a backrest of the chair) for a user's back, and a second lever arm acting on the seat, in particular from below when the support surface is loaded.
  • a chair includes an elastically deformable seat, a support surface for a user's back, typically provided by a backrest of the seat, and a rigid first coupling element having a first lever arm supporting the support surface, and a second lever arm arranged at the seat so that the elastically deformable seat is deformed, typically upwardly curved and/or at least partially raised, when a user is leaning back on the support surface.
  • the chair and/or the coupling mechanics may include a second coupling element having a first lever arm to which the backrest is attached, and a second lever arm acting on the seat when the backrest is loaded and/or acting from below on the seat when the backrest is loaded.
  • the chair and/or the coupling mechanics may include a left and a right coupling element which are typically arranged mirror-symmetrically.
  • the respective coupling element is, at least in a side view, at least substantially L-shaped.
  • first lever arm of the respective coupling element is typically longer than the second lever arm of the respective coupling element, for example by a factor of at least two or three.
  • a remote end of the respective second lever arm i.e. an end remote from and/or facing away from the respective second lever arm, may act directly on the seat, exerts a force onto the seat and/or presses from below against the seat, at least when the backrest is loaded.
  • the remote end is typically not fixed to the seat, and therefore also called free end.
  • the free end may press from below against the bottom side of the seat.
  • the free end may slide along the bottom side of the seat.
  • shallow recess or notch at the bottom side may provide guidance for the free end.
  • the remote end may be arranged in a slot or cavity formed between the bottom side and the upper side of the seat.
  • the remote end may be connected with the seat side of the seat, typically covered by a seat upholstery. In this embodiment, the remote end may pull the seat when the user is leaning back.
  • the setup of the chair is typically simpler if the free end acts from below against the seat.
  • a connecting element may connect the second lever arm of the first coupling element and the second lever arm of the second coupling element with each other.
  • the connecting element acts from below on the seat, more typically presses from below towards a central portion (of the back side) of the seat when the backrest is loaded.
  • the connecting element may even directly press from below against the central portion of the seat.
  • the connecting element may include a rod or a strut connecting the first and second coupling elements.
  • the connecting element may be a substantially U-shaped rod or strut having a middle portion adjoining the back side of the seat.
  • the connecting element may be substantially Y-shaped or substantially T-shaped, at least when seen from above.
  • a remote end (free end) of the connecting element may act on and/or is typically in contact with the middle portion of the seat.
  • the second lever arms of the first and second coupling element may only act via the connecting element on the seat.
  • the chair and/or the coupling mechanics are typically hinge-mounted (hingedly connected) to a frame of the chair.
  • the coupling mechanics and/or the coupling element(s) may be in articulated connection with a crossbar of the frame.
  • the frame may be a welded round tube frame.
  • the seat is typically attached to the frame, more typically in articulated connection with the frame.
  • the seat is, depending on a user's load on the backrest, only partly raised or lifted (with respect to ground and legs of the chair, respectively).
  • the seat is typically not lifted from the frame in these embodiments, but only deformed and thus does not move away from the frame during the swiveling process, potential clamping points can be excluded. Accordingly, the chair can be designed in such a way that there is practically no risk of jamming (no danger of jamming).
  • the seat may be deformed completely or only partially when the backrest is tilted backwards. Further, the seat may be inclinable, at least to some extent. Thus, the sitting comfort of the chair may be further improved.
  • the seat may facilitate avoiding unwanted mechanical stress due to the (backward) moving backrest.
  • the seat may be mounted between two side portions (a left and a right one) of the frame using a respective hinge, in particular a respective hinge joint on both sides.
  • the joint axis of the hinges used for mounting the seat are at least substantially perpendicular to the joint axes of the main hinge(s) used for mounting the coupling mechanics and the coupling element(s), respectively, to the frame.
  • the main hinge is also referred to as primary hinge.
  • the main hinge(s) may be shifted in forward direction (away from the backrest) so that the backrest lowers slightly when swiveling backwards (when the user is leaning backwards). Accordingly, a user's shirt may not be pulled out of the trousers during swiveling backwards.
  • the seat may also be screwed to the frame.
  • a spacer in particular an elastic spacer held by the respective screw is arranged between the seat and the frame.
  • elastic spacer(s) may also facilitate avoiding unwanted mechanical stress due to the (backward) moving backrest.
  • the seat is operable as a spring and, thus, may store mechanical energy when the user is sitting on the seat and is leaning back on the backrest.
  • the seat is therefore also operable as a power accumulator for storing energy when a user is leaning back on the backrest and/or when the seat and the backrest are braced against each other (loaded against each other).
  • the seat is the chairs only power accumulator which is capable of storing energy when the seat and the backrest of braced against each other.
  • the chair is typically free of additional springs and/or gas struts for storing the mechanical energy when the user is sitting on the seat and is leaning back on the backrest.
  • the chair may even be free of any additional springs and/or gas struts.
  • the seat may be padded or unpadded.
  • the (unpadded) seat is at least substantially plate-shaped, but may be downwardly curved.
  • a horizontal extension of the seat may exceed a vertical thickness (layer thickness) of the seat by at least a factor of 20.
  • the seat is pre-stressed (preloaded, pretensioned) in an unloaded state (without a user sitting on the chair).
  • the seat may provide large enough elastic restoring forces to hold the backrest in a desired orientation (an upright starting position) even when no user is sitting on the seat.
  • the adjustment can be integrated relatively easily if desired.
  • the free end may be jacked up at the position pressing against the seat. This increases the pre-stressing of the seat and a greater force acts via the lever mechanism on the backrest.
  • the pre- stressing may be adjusted at junctions between the seat and the frame.
  • the (pre-stressed) seat is downwardly curved more typically downward concave in the unloaded state when seen in a front view.
  • the seat may include or may be made of wood, a metal, a plastic, a composite material and/or another elastic material. [0078] Accordingly, the proposed design can be easily adapted to the location and preferred production methods and materials, respectively.
  • the chair can, due to the flexibility with respect of the material, be designed for use in locations with specific requirements for fire protection, cleaning, weather conditions etc., e. g. at the airport, outdoors or in hospitals.
  • an elastic modulus of the seat is anisotropic.
  • the force exerted on the seat by the coupling mechanism and the coupling element(s), respectively may be better distributed in the seat. This may facilitate avoiding forming a tangible (unpleasant) bulge in the seat when the user is leaning back.
  • the composite material of the seat may include a matrix material and fibers and/or rods.
  • the seat may have grooves, notches and/or webs.
  • the fibers, the rods, the grooves, the notches and the webs, respectively are, when seen from above, at least on average aligned at least substantially parallel to a lateral edge of the seat and/or extend at least substantially from a rear edge of the seat to a front edge of the seat.
  • Canteens in companies, public authorities and universities are used mainly by employees or students and guests for informal exchanges of ideas.
  • the typical requirements for a chair in canteens such as stackability, robustness, suitability for different users, easy cleaning, and a four-legged frame can also be fulfilled by the chairs described herein at comparatively low costs.
  • a conference room In addition to classic requirements such as comfort, a conference room often has representative features that the furnishings should meet.
  • the typical requirements for a chair in conference rooms such as suitability for different users, upholstered seat and backrest, armrests, star or cross base can also be fulfilled by the chairs described herein at comparatively low costs.
  • a method for manufacturing the chairs described the herein includes providing attaching an elastically deformable seat to a frame, hinge- mounting a coupling element having a first lever arm and a second lever arm to the frame, and attaching a backrest to the first lever arm, so that the second lever arm is arranged at the seat, typically at a back side of the seat.
  • the assembly may be very simple as only a few parts may be used.
  • All common frames may be used, in particular four-legged frame, skid frame, star-foot frame, and a cantilever frame.
  • a chair in particular an office chair has a (coupling) mechanics operating between the seat of the chair and the backrest of the chair, by means of which the inclination resistance of the backrest is dependent on the load on the seat by the user.
  • the seat is at least partially raised as a function of the load on the backrest, wherein the mechanics cause the elastically deformable seat to curve upwards. This curvature or bulging ensures that the user is raised when the backrest is loaded.
  • the (coupling) mechanism may consist of only a few parts and does not require any additional height. Note that no disruptive volume under the seat is required for the power accumulator.
  • the chair may have relatively low wear and tear.
  • the components are typically easy to replace due to the simple assembly.
  • the chair proposed herein can be designed to be stackable, typically even tightly stackable.
  • the chairs described herein may be relatively light. This may facilitate transport, stacking and rearranging of the chairs.
  • the backrest is supported by a long lever arm of at least one L-shaped lever, and the short (r) lever arm of the lever acts with its free end directly on the seat.
  • the (coupling) mechanism is typically implemented as a lever mechanism, more typically as a simple lever.
  • the relationship between the length of the lever and the maximum angle between the backrest and the seat is preferably chosen in such a way that the middle of the seat is raised by at most 16 mm, more typically at most 15 mm in front view.
  • the low deformation of the seat avoids any unpleasant pressure on the user's lower thigh.
  • the seat may be provided with a plurality of weaknesses which are substantially perpendicular to the plane of the (unloaded) backrest so that the elastic curvature or bulging of the seat is uniformly or at least more uniformly formed over the entire extension and/or area of the seat.
  • the weaknesses may be formed as grooves.
  • the illustrated chair for a single person 100 has a frame 16 including four exemplary legs, a seat 14 connected to the frame 16 and a backrest 10.
  • the chair 100 includes and/or consists of the backrest 10 carried by long legs 10a of a pair of L-shaped levers 12, the elastic seat 14 and the frame 16 supporting the seat 14.
  • the seat surface is connected to the frame 16 via hinges 20.
  • the hinges 20 form pivot points which absorb the vertical forces that occur.
  • the two L-shaped levers 12 are connected to each other via a rod 19, which acts in its centre on the downwardly concave seat 14.
  • a rod 19 acts in its centre on the downwardly concave seat 14.
  • the seat 14 is arched upwards against the elasticity of the seat and against the load acting on the seat. This curvature ensures that the user is raised.
  • a large number of grooves 21 were inserted in seat 14, essentially perpendicular to the plane of the backrest 10 (see Figs. 3, 4).
  • the backrest 10 is pushed forward against the force applied by the user to the backrest 10 when the seat surface 14 is loaded.
  • the chair as proposed herein can be designed to be stackable.
  • the mechanism consists of only a few parts and does not require any additional height.
  • the chair 100 is a chair with bodyweight function.
  • the bodyweight function is realized in a cost-efficient manner using the seat as only power accumulator. Without this power accumulator, the backrest 10 would not be able to return to its original position once it has been brought into its final position if the seat is not loaded.
  • the user's load on the backrest changes continuously as the backrest swings backwards.
  • the user exerts less force on the backrest in a starting position than in the end position with backwards tilted backrest.
  • This successive increase in the force acting on the backrest is compensated for by means of the (further deforming) seat acting as power accumulator.
  • the seat is the only power accumulator for implementing the economically desired bodyweight function. No additional power accumulator other than the seat itself is required.
  • the frame is typically not deformed when the backrest is tilted backwards.
  • the chair in particular its frame may have a gas strut as hydraulic chair height adjustment mechanism.
  • the bodyweight function of the chairs described herein can be achieved with only one main hinge located under the seat.
  • the main hinge connects the lever 12 and a rear crossbar of the frame 16.
  • the main hinge is typically arranged in or at least next to a central vertical symmetry axis of the chair when seen in a front view or a back view.
  • a left and a right main hinge connect the rear crossbar of the frame 16 with the left lever 12 and the right lever 12', respectively.
  • the main hinge(s) may also provide a stopper for the backrest.
  • the chair may have secondary hinges for mounting the seat on the frame.
  • secondary hinges for mounting the seat on the frame.
  • two secondary hinges are used at the connection between the seat and the frame, in particular left secondary hinge and right secondary hinge of the seat arranged in front view at the left side and right side of the seat, respectively.
  • two secondary hinges may be used at both sides.
  • the secondary hinges may be designed in different ways. Three examples are explained in the following with regard to figure 5 and 10.
  • Figures 5 and 6 show respective sections of a chair 101 in a front view.
  • the chair 101 is typically similar as the chair 100 explained above with regard to figure 1 to figure 4.
  • a respective friction bearing is used as left secondary and right secondary hinge between the seat 14 and the frame 16.
  • Figure 5 illustrates an unloaded state of the chair 101 in which the backrest (not shown) is in the most upright orientation (also referred to as starting position).
  • Figure 6 illustrates loaded state of the chair 101 in which the backrest (not shown) is completely settled back (also referred to as end position).
  • the frame 16 is implemented as a welded round tube frame.
  • the left side of the seat 14 is screwed from below to a left tube of the frame 16.
  • the right side of the seat 14 is screwed to a right tube of the frame.
  • only a left seat connecting region next to a left edge 144 of the seat 14 is illustrated in figures 5, 6.
  • a screw 15 leading through two spacers 17 and the right tube sandwiched between the two spacers 17 may be used for mounting the seat 14 to the frame 16 in manner allowing a slight movement of the left edge 144 (and likewise the right edge) of the seat 14 with respect to the frame 16 when the backrest is pivoted with respect to the frame (and the seat 14 deformed).
  • the screw 15 rotates back and forth in the slotted hole.
  • the height of the spacers 17 between the frame 16 and the seat 14 may depend on the curvature of the seat 14 when the backrest (not shown) is in the starting position.
  • Figures 7 and 8 show respective left sections of a chair 102 in a front view.
  • the chair 102 is typically similar to the chair 101 explained above with regard to figures 5, 6.
  • hinge joints 13 are used as left secondary and right secondary hinge, respectively, between the seat 14 and the frame 16.
  • Figure 7 illustrates the chair 102 when the backrest (not shown) is in the starting position.
  • Figure 8 illustrates the chair 102 when the backrest (not shown) is in the end position.
  • the height of the spacer 17 between the frame 16 and the seat 14 may again depend on the curvature of the seat 14 when the backrest (not shown) is in the starting position.
  • Figures 9 and 10 show respective left sections of a chair 103 in a front view.
  • the chair 103 is typically similar to the chairs 101 , 102 explained above with regard to figures 5 to 8.
  • elastic spacers or buffers 17 the desired function of left secondary and right secondary hinges, respectively, between the seat 14 and the frame 16.
  • Figure 9 illustrates the chair 103 when the backrest (not shown) is in the starting position.
  • Figure 10 illustrates the chair 103 when the backrest (not shown) is in the end position.
  • the spacer 17 becomes deformed when the seat 14 is deformed (when the backrest is moved between the starting position and the end position).
  • the elastic spacer(s) 17 may be T-profiles and T-shaped in front view, respectively. [00151 ] The elastic spacer(s) 17 may for example be made of rubber, silicon or another elastic material.
  • the seat 14 can move at the lateral sides (edges).
  • the seat 14 should be a few millimetres away from the hinges (joints). This distance may again depend on the degree of curvature/bulging of the seat 14 in the starting position of the backrest.
  • Figure 1 1 illustrates a chair 104 in side views when the backrest (not shown) is in a starting position (full lines) and in an end position (dashed lines).
  • the chair 104 is typically similar to the chairs 100 - 103 explained above with regard to figures 1 to 10.
  • Figure 1 1 may even correspond to an enlarged view on the left side of the chair 100.
  • main hinge 18, a portion of the lever 12, a portion of the back side 141 and a rear edge 142 of the seat 14 are illustrated in figure 1 1 .
  • the chair 104 may be implemented so that, apart from an at most very slight change in curvature (not shown), the back side 141 (as well as the upper site) are (substantially) parallel displaced in vertical direction over the entire seat depth when the backrest is moved between the starting position and the end position.
  • longitudinal grooves or webs at the backside or the upper side of the seat 14 may ensure that the seat 14 is deformed to a correspondingly low extent over the entire seat depth.
  • the webs may ensure that the seat is not deformed at certain points, but in the longitudinal direction of the webs over their entire depth.
  • the front edge of the seat 14 may even be deformed as far up as the seat at the point where the lever 12' acts on the seat 14 from below.
  • a length of the second lever arm 10b is typically in a range from about 50 mm to 70 mm, more typically in a range from about 55 mm to 65 mm.
  • the main hinge 18 is typically arranged in a vertical position above a lower position of the backside 141 (at the lowest point of the seat's curvature) when the backrest is in the starting position and below an upper position of the backside 141 (at the lowest point of the seat's curvature) when the backrest is in the end position.
  • a chair includes a frame, an elastically deformable seat, a support surface for a user's back, and a rigid first coupling element which is in articulated connection with the frame and has a first lever arm supporting the support surface, and a second lever arm arranged at the seat so that the elastically deformable seat is operable as a spring and/or as a power accumulator for storing an energy, and typically forms the only spring and power accumulator, respectively, of the chair for this purpose, when the user leans back and/or is leaning back on the support surface.
  • the support surface is typically provided by a backrest of the chair.
  • the seat is typically upwardly curved and/or at least partially raised, more typically upwardly curved and partially raised, when the support surface and the backrest, respectively, is moved backwards and/or tilted back by the user.
  • a chair includes a frame, an elastically deformable seat attached to the frame, a coupling element in articulated connection with the frame and including a first lever arm and a second lever arm arranged at the seat, and a backrest attached to the first lever arm.
  • a method for manufacturing a chair includes providing a frame, attaching an elastically deformable seat to the frame, mounting a coupling element, in particular a lever to the frame in an articulated manner, the coupling element including a first lever arm and a second lever arm, and attaching a backrest to the first lever arm, so that the second lever arm is arranged at the seat, typically at a back side of the seat opposite a seat area of the seat.

Landscapes

  • Chairs Characterized By Structure (AREA)

Abstract

L'invention concerne une chaise qui comprend un siège élastiquement déformable (14), un dossier (10), et une mécanique de couplage (12) disposée entre le siège (14) et le dossier (10) de telle sorte qu'une résistance à l'inclinaison du dossier (10) dépend de la charge d'un utilisateur sur le siège (14), et que le siège (14), en fonction de la charge d'un utilisateur sur le dossier (10), est incurvé vers le haut et/ou au moins partiellement relevé.
PCT/EP2018/053817 2017-02-16 2018-02-15 Chaise Ceased WO2018149931A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017001503.1A DE102017001503A1 (de) 2017-02-16 2017-02-16 Ein Stuhl, inbesondere ein Bürostuhl, mit einer zwischen der Sitzfläche und der Rückenlehne wirkenden Mechanik, durch die der Neigungswiderstand der Rückenlehne in Abhängigkeit von der Belastung der Sitzfläche steht. Die Sitzfläche wird in Abhängigkeit von der Belastung der Rückenlehne wenigstens teilweise angehoben.
DE102017001503.1 2017-02-16

Publications (1)

Publication Number Publication Date
WO2018149931A1 true WO2018149931A1 (fr) 2018-08-23

Family

ID=61244600

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/053817 Ceased WO2018149931A1 (fr) 2017-02-16 2018-02-15 Chaise

Country Status (2)

Country Link
DE (1) DE102017001503A1 (fr)
WO (1) WO2018149931A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021141073A1 (fr) * 2020-01-09 2021-07-15 ＮａｔｕｒｅＡｒｃｈｉｔｅｃｔｓ株式会社 Chaise, partie de siège et dossier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5486035A (en) * 1994-08-01 1996-01-23 Koepke; Marcus C. Occupant weight operated chair
JPH10313967A (ja) * 1997-05-22 1998-12-02 Itoki Crebio Corp 椅子のロッキング強弱調節装置
US20160135603A1 (en) * 2013-06-06 2016-05-19 Itoki Corporation Chair

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251958A (en) 1989-12-29 1993-10-12 Wilkhahn Wilkening & Hahne Gmbh & Co. Synchronous adjusting device for office chairs or the like
AR057387A1 (es) 2005-06-20 2007-12-05 Humanscale Corp Aparato de asiento con movimiento reclinable
US7926879B2 (en) 2007-09-20 2011-04-19 Herman Miller, Inc. Load support structure
DE202012002288U1 (de) 2012-03-08 2012-05-11 Walter Knoll Ag & Co. Kg Funktionsstuhl
DE102013003083A1 (de) 2013-02-23 2014-08-28 Klöber GmbH Synchronmechanik für Bürostühle mit an den Benutzerschwerpunkt gekoppelter autoadaptiver Rückstellkraft

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5486035A (en) * 1994-08-01 1996-01-23 Koepke; Marcus C. Occupant weight operated chair
JPH10313967A (ja) * 1997-05-22 1998-12-02 Itoki Crebio Corp 椅子のロッキング強弱調節装置
US20160135603A1 (en) * 2013-06-06 2016-05-19 Itoki Corporation Chair

Also Published As

Publication number Publication date
DE102017001503A1 (de) 2018-08-16

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