EP0539377B1 - High density stacking flex chair - Google Patents

High density stacking flex chair Download PDF

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Publication number
EP0539377B1
EP0539377B1 EP91907969A EP91907969A EP0539377B1 EP 0539377 B1 EP0539377 B1 EP 0539377B1 EP 91907969 A EP91907969 A EP 91907969A EP 91907969 A EP91907969 A EP 91907969A EP 0539377 B1 EP0539377 B1 EP 0539377B1
Authority
EP
European Patent Office
Prior art keywords
chair
seat
connection means
frame
leg portions
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.)
Expired - Lifetime
Application number
EP91907969A
Other languages
German (de)
French (fr)
Other versions
EP0539377A1 (en
EP0539377A4 (en
Inventor
Charles O. Perry
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
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Publication of EP0539377A1 publication Critical patent/EP0539377A1/en
Publication of EP0539377A4 publication Critical patent/EP0539377A4/en
Application granted granted Critical
Publication of EP0539377B1 publication Critical patent/EP0539377B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/021—Rocking chairs having elastic frames
    • A47C3/023—Rocking chairs having elastic frames made of tubular material
    • 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
    • A47C3/04—Stackable chairs or nesting chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/44—Supports for the head or the back for the back with elastically-mounted frame

Definitions

  • the present invention relates to chair design, more specifically, to a design for a high density stacking chair with a tilting back.
  • a chair with a tiltable back portion is presented, wherein a single frame is provided, having a seat portion attached thereto, and a back portion pivotally attached thereto.
  • ergometric adjustment of the chair is accomplished by tilting of the back portion and flexure of the frame, and flexure of the frame urges the back portion into a normal upright position for stacking and uniform appearance.
  • the back portion may be curved and hollow, and engages the frame at upper and lower curved sections of the frame, which sections preferably have radii of curvatures less than that of the back portion and which sections are positioned at a downward angle such that the effective horizontal radii of the sections in the upright position is shorter than the actual radii, causing the back portion to rest against the curved sections and limit forward tilting of the chair back. Therefore when the back portion is tilted, the radial movement disengages the back portion from the curved sections due to the preferred difference in radii, until the angle of tilt is such that the effective radii are again equal and the back portion again rests against the curved sections of the frame and limits tilting backward.
  • Fig. 1 is a chair built according to the present invention.
  • Fig. 2 is the preferred embodiment of a chair built according to the present embodiment.
  • Figs. 3-5 are views taken across section 3-3 of Fig. 1 and showing the chair extending through its range of backward tilt.
  • Fig. 6 is a view taken across Section 6-6 of Fig. 4 and represents a plan view of the chair according to the present invention.
  • Fig. 7 is a perspective view of the chair according to the present invention.
  • a first embodiment of a chair according to the present invention is shown.
  • the back portion is curved to adapt to a user's back and is composed of a front section 32 and a rear section 34, each of which has a lip 33, 35 or other spacer which creates a hollow interior space between sections when they are attached.
  • the frame 10 is ideally a continuous structure, constructed of solid rod or tubular steel or the like. Alternatively, it may consist of welded or otherwise connected sections.
  • the frame 10 has an upper curved section 12 which is enclosed within the back portion 30 with cylindrical bearing sections 12a at either end and which extends through the middle of the back portion and is angled downward.
  • the frame 10 then extends from each end of the upper curved section 12 outward from the hollow interior, the back portion 30 being pivotally attached thereto at the cylindrical sections 12a.
  • This pivotal attachment can be accomplished by bearings attached to the front section 32, but is preferably accomplished by providing bearing surfaces 12b formed on plastic molded front and back sections 32 and 34.
  • the frame 10 has a pair of rear support legs 16 which extend downward and rearward to a floor surface and forwardly along the floor.
  • a pair of front support legs 18 then extend upward and rearward to the front of the seat portion 20, then rearward supporting the seat portion 20, then slightly inward, then upward into the back portion 30, then inward, where the back portion is again pivotally attached in a manner similar to the pivot connection 12a and 12b.
  • the frame 10 continues to a lower curved section 14 which is enclosed within the back portion and which extends through the back portion having a downward angle.
  • the distance d 1 between the opposing legs of the frame 10 as it sits on the floor is lesser than the width d 2 of the seat portion 20, so as to facilitate stacking a plurality of such chairs.
  • the seat supporting portion of the frame 10 is positioned inwardly from the edges of the seat portion 20 and connected by welded struts 22 to improve the support of the seat portion and lateral stability of the frame.
  • lateral stability can be provided by a pair of stabilizers 50, 52.
  • clips 24 are attached to the bottom surface of the seat portion 20 in order to easily attach/detach the seat portion to frame 10.
  • the back portion 30 is a one-piece molded unit, having openings or clips 40 which are adapted to pivotally engage the rear support legs 16 at cylindrical sections 12a. Openings or clips 42 are likewise adapted to pivotally engage the front support legs 18. In this way, the back portion 30 may be easily and securely fitted to frame 10.
  • the curved sections 12 and 14 remain in a fixed position relative to frame 10 to provide pivotal limits, as will be next described.
  • Figs. 3-5 the tilting action of the back portion 30 is illustrated.
  • the rear support legs 16 of the frame 10 are inclined at a forward angle so as to provide a natural spring-type action which holds the back portion 30 forward.
  • the curved sections 12 and 14 of frame 10 are parallel, each extending outward and downward from the back of the front section 32 at a twenty-two and one-half degree angle.
  • the radii of curvature for both curved sections 12 and 14 is lesser than that of the back portion.
  • the radius of curvature of section 12 projected at a plane inclined to the plane of section 12 by an angle of 22.5 degrees equals the radius of curvature of the back portion 30, such that the inside of the front section 32 is in contact with the curved sections 12 and 14 at points 36 and 37 as a result of the effective radius of the curved sections 12 and 14 being equal to the radius of the back portion 30.
  • the front section 32 pivots about point 50 on the upper curved section, causing the upper half of the front section to rotate backwards, and the lower half to rotate forward about point 50.
  • the seat portion 20 will be lifted by the forward rotation of the lower curved section 14. Since the back portion 30 has a greater radius of curvature than both curved sections, the back portion lifts away from the curved sections as it is tilted, reengaging the curved sections at points 38 and 39, located further down the back portion, where the effective radii of the back portion is again equal to the radii of the curved sections after the back portion has tilted 45 degrees.
  • FIG. 6 A clearer view of the relationship of the curved sections 12 and 14 to the overall frame structure 10 is illustrated in Fig. 6 where the cylindrical sections of the frame 12a are apparent providing straight bearing areas.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Stackable Containers (AREA)

Abstract

A high density stacking flex chair is disclosed. A frame has a seat attached thereto, and a back pivotally attached thereto. The back is curved and can tilt backwards, but is limited by the frame which, through the back, has a lesser radius of curvature and is angled downward, thus providing stop action for back rotation.

Description

BACKGROUND Field of the Invention
The present invention relates to chair design, more specifically, to a design for a high density stacking chair with a tilting back.
Discussion of the Prior Art
The use of low-cost, stacking chairs is well-known in the art. However, such chairs are designed not with comfort or ergonomics in mind, but rather to provide a large quantity of temporary seats for occasional use which can ordinarily be stored and take up minimal storage space. Such chairs may have some limited flexibility in the seat back portion, but provide no ergonomic benefits.
Considerable attention has been focused in recent years on better ergonomic designs, resulting in home and office chairs which demonstrate a wide variety of designs which include the ability to recline and provide lumbar support. See, for example, U.S. Patent No. 4,732,424 (EP-A-0 173 372). Such ergonomic designs do not, however, provide low cost seating. Thus, it would be desirable to combine the benefits of ergonomic design into a low cost, stackable chair.
SUMMARY OF THE INVENTION
The chair of the invention is defined by the features of claim 1, further embodiments are defined by the dependent claims.
A chair with a tiltable back portion is presented, wherein a single frame is provided, having a seat portion attached thereto, and a back portion pivotally attached thereto. In use ergometric adjustment of the chair is accomplished by tilting of the back portion and flexure of the frame, and flexure of the frame urges the back portion into a normal upright position for stacking and uniform appearance. The back portion may be curved and hollow, and engages the frame at upper and lower curved sections of the frame, which sections preferably have radii of curvatures less than that of the back portion and which sections are positioned at a downward angle such that the effective horizontal radii of the sections in the upright position is shorter than the actual radii, causing the back portion to rest against the curved sections and limit forward tilting of the chair back. Therefore when the back portion is tilted, the radial movement disengages the back portion from the curved sections due to the preferred difference in radii, until the angle of tilt is such that the effective radii are again equal and the back portion again rests against the curved sections of the frame and limits tilting backward.
A better understanding of the features and advantages of the present invention will be obtained by reference to the following detailed description of the invention and accompanying drawings which set forth an illustrative embodiment in which the principles of the invention are utilized.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a chair built according to the present invention.
Fig. 2 is the preferred embodiment of a chair built according to the present embodiment.
Figs. 3-5 are views taken across section 3-3 of Fig. 1 and showing the chair extending through its range of backward tilt.
Fig. 6 is a view taken across Section 6-6 of Fig. 4 and represents a plan view of the chair according to the present invention.
Fig. 7 is a perspective view of the chair according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Referring now to Fig. 1, a first embodiment of a chair according to the present invention is shown. There are three major portions of the chair: a frame 10, a seat portion 20, and a back portion 30. The back portion is curved to adapt to a user's back and is composed of a front section 32 and a rear section 34, each of which has a lip 33, 35 or other spacer which creates a hollow interior space between sections when they are attached.
The frame 10 is ideally a continuous structure, constructed of solid rod or tubular steel or the like. Alternatively, it may consist of welded or otherwise connected sections. The frame 10 has an upper curved section 12 which is enclosed within the back portion 30 with cylindrical bearing sections 12a at either end and which extends through the middle of the back portion and is angled downward. The frame 10 then extends from each end of the upper curved section 12 outward from the hollow interior, the back portion 30 being pivotally attached thereto at the cylindrical sections 12a. This pivotal attachment can be accomplished by bearings attached to the front section 32, but is preferably accomplished by providing bearing surfaces 12b formed on plastic molded front and back sections 32 and 34.
The frame 10 has a pair of rear support legs 16 which extend downward and rearward to a floor surface and forwardly along the floor. A pair of front support legs 18 then extend upward and rearward to the front of the seat portion 20, then rearward supporting the seat portion 20, then slightly inward, then upward into the back portion 30, then inward, where the back portion is again pivotally attached in a manner similar to the pivot connection 12a and 12b. The frame 10 continues to a lower curved section 14 which is enclosed within the back portion and which extends through the back portion having a downward angle. The distance d1 between the opposing legs of the frame 10 as it sits on the floor is lesser than the width d2 of the seat portion 20, so as to facilitate stacking a plurality of such chairs.
In the preferred embodiment of Fig. 2, the seat supporting portion of the frame 10 is positioned inwardly from the edges of the seat portion 20 and connected by welded struts 22 to improve the support of the seat portion and lateral stability of the frame. In Fig. 7, such lateral stability can be provided by a pair of stabilizers 50, 52. Additionally, clips 24 are attached to the bottom surface of the seat portion 20 in order to easily attach/detach the seat portion to frame 10.
The back portion 30 is a one-piece molded unit, having openings or clips 40 which are adapted to pivotally engage the rear support legs 16 at cylindrical sections 12a. Openings or clips 42 are likewise adapted to pivotally engage the front support legs 18. In this way, the back portion 30 may be easily and securely fitted to frame 10. The curved sections 12 and 14 remain in a fixed position relative to frame 10 to provide pivotal limits, as will be next described.
Referring now to Figs. 3-5, the tilting action of the back portion 30 is illustrated. When the chair is in its upright position, as in Fig. 3, the rear support legs 16 of the frame 10 are inclined at a forward angle so as to provide a natural spring-type action which holds the back portion 30 forward.
The curved sections 12 and 14 of frame 10 are parallel, each extending outward and downward from the back of the front section 32 at a twenty-two and one-half degree angle. The radii of curvature for both curved sections 12 and 14 is lesser than that of the back portion. But, the radius of curvature of section 12 projected at a plane inclined to the plane of section 12 by an angle of 22.5 degrees equals the radius of curvature of the back portion 30, such that the inside of the front section 32 is in contact with the curved sections 12 and 14 at points 36 and 37 as a result of the effective radius of the curved sections 12 and 14 being equal to the radius of the back portion 30.
As a user leans back on the chair, the front section 32 pivots about point 50 on the upper curved section, causing the upper half of the front section to rotate backwards, and the lower half to rotate forward about point 50. Note also that the seat portion 20 will be lifted by the forward rotation of the lower curved section 14. Since the back portion 30 has a greater radius of curvature than both curved sections, the back portion lifts away from the curved sections as it is tilted, reengaging the curved sections at points 38 and 39, located further down the back portion, where the effective radii of the back portion is again equal to the radii of the curved sections after the back portion has tilted 45 degrees.
A clearer view of the relationship of the curved sections 12 and 14 to the overall frame structure 10 is illustrated in Fig. 6 where the cylindrical sections of the frame 12a are apparent providing straight bearing areas.
It should be understood that the invention is not intended to be limited by the specifics of the above-described embodiment, but rather defined by the accompanying claims.

Claims (11)

  1. A chair, comprising:
    a seat (20) adapted to engage a user's seat;
    a back (30) generally perpendicular to said seat and adapted to engage a user's back and having upper and lower regions; and
    a frame (10) for holding and supporting said seat (20) and back portions (30), said frame comprising
    a pair of support legs (16, 18) one at each side of the seat (20) with each support leg having a back leg portion (16) pivotally attached by first connection means (12a, 42) to the upper region of said back (30), a front leg portion (18) extending upwardly to the front of said seat (20) to support said seat (20), a bottom leg portion for extending along a floor surface between said back leg portion (16) and said front leg portion (18),
    second connection means (12a, 40) pivotally connecting the rear of the seat (12) to the lower region of said back (30) at a location below the attachment (12a, 42) of the back leg portions (16) to the upper region of said back (30), whereby the flexibility of the frame (10) permitting the back (30) to resiliently tilt toward a reclining position while the user's weight is suspended from the second connection means (12a, 40).
  2. The chair of claim 1
    wherein said back (30) has a curved surface.
  3. The chair of claim 1 or 2
    characterized further by limited relative pivotal movement of the back (30) in both directions with respect to the support legs between an upright position determined by the stop means and a reclined position with the back (30) held in the upright position by the resiliency of the support legs.
  4. The chair of claim 3
    characterized further by a curved rod (12) connected between the back leg portions (16) for pivotal movement with respect to the back (30) as the back (30) pivots with respect to the legs with the curved rod (12) having a radius of curvature less than the radius of curvature of the back (30) whereby the curved rod (12) limits pivotal movement of the back (30) in both directions.
  5. The chair of claim 3
    characterized further by a first curvilinear section (12) attached to each of said back leg portions (16) at the upper region of said back (30) and extending across the upper region at a downward angle, wherein said first curvilinear section (12) has a radius of curvature less than that of said back (30), and wherein said back (30) is pivotally attached to said back leg portions (16) and first curvilinear section, and a second curvilinear section (14) attached to said connecting means at the lower region of said back (30) and extending across the lower region at said downward angle, wherein said second curvilinear section (14) has a radius of curvature less than that of said back, and said downward angle is equal to about twenty-two and one-half degrees.
  6. The chair of any of claims 1 through 5
    characterized further by said bottom leg portions being spaced apart by more than the width of the seat in order to facilitate stacking.
  7. The chair of any of claims 1 through 6
    further characterized by the second connection means (12a, 40) being located above the bottom of the back (30).
  8. The chair of any of claims 1 through 7
    further characterized by the first connection means (12a, 42) being located below the top of the back (30) and the second connection means (12a, 40) being located above the bottom of the back (30) and below the first connection means (12a, 42).
  9. The chair of any of claims 1 through 8
    further characterized by the second connection means (12a, 40) being located above the seat (20).
  10. The chair of any of claims 1 through 9
    further characterized by said front leg portions (18) extending rearwardly along the seat (20) to couple with said second connection means (12a, 40).
  11. The chair of any of claims 1 through 9
    further characterized by said front leg portions (18) extending rearwardly along the seat to form said second connection means.
EP91907969A 1990-04-10 1991-04-03 High density stacking flex chair Expired - Lifetime EP0539377B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US50671690A 1990-04-10 1990-04-10
US506716 1990-04-10
PCT/US1991/002305 WO1991015139A1 (en) 1990-04-10 1991-04-03 High density stacking flex chair

Publications (3)

Publication Number Publication Date
EP0539377A1 EP0539377A1 (en) 1993-05-05
EP0539377A4 EP0539377A4 (en) 1993-06-16
EP0539377B1 true EP0539377B1 (en) 1998-06-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91907969A Expired - Lifetime EP0539377B1 (en) 1990-04-10 1991-04-03 High density stacking flex chair

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US (1) USRE36335E (en)
EP (1) EP0539377B1 (en)
JP (2) JPH0815446B2 (en)
KR (1) KR0182297B1 (en)
AT (1) ATE167369T1 (en)
AU (1) AU651971B2 (en)
CA (1) CA2080248C (en)
DE (1) DE69129628T2 (en)
ES (1) ES2118081T3 (en)
IL (1) IL97762A (en)
NZ (1) NZ237726A (en)
WO (1) WO1991015139A1 (en)

Families Citing this family (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD460874S1 (en) 2000-04-25 2002-07-30 Chicago Textile Corporation Chair
US6722735B2 (en) 2001-04-16 2004-04-20 Ditto Sales, Inc. Chair with synchronously moving seat and seat back
US6623078B2 (en) 2001-04-30 2003-09-23 First Source Furniture Group Llc Adjustable height chair arm supported on back upright
USD477926S1 (en) 2002-05-29 2003-08-05 Lifetime Products, Inc. Chair
USD466712S1 (en) 2002-07-17 2002-12-10 Lifetime Products, Inc. Chair
USD472745S1 (en) 2002-07-23 2003-04-08 Lifetime Products, Inc. Chair back and seat
USD472723S1 (en) 2002-07-23 2003-04-08 Lifetime Products, Inc. Chair frame
US20040075328A1 (en) * 2002-10-16 2004-04-22 Royal Seating Corporation Versatile chair system
USD508339S1 (en) 2003-05-16 2005-08-16 Lifetime Products, Inc. Chair
US6974188B2 (en) * 2003-08-13 2005-12-13 Cosco Management, Inc. Chair with pivotable chair back
USD527921S1 (en) * 2003-10-06 2006-09-12 Kokuyo Co., Ltd. Chair
US20050194823A1 (en) 2004-01-29 2005-09-08 Perry Marco C. Flexible chair with post base
US7384100B2 (en) * 2004-05-06 2008-06-10 Marco C. Perry Flexible reclining chair
USD507425S1 (en) 2004-05-11 2005-07-19 Lifetime Products, Inc. Chair
US7114782B2 (en) * 2004-05-26 2006-10-03 Center For Design Research And Development N.V. Flexible chair with stiffener inserts and method for forming a chair
USD552897S1 (en) 2005-01-28 2007-10-16 Chicago Textile Corporation Chair
JP4792233B2 (en) * 2005-03-02 2011-10-12 株式会社イトーキ Chair
JP4792234B2 (en) * 2005-03-02 2011-10-12 株式会社イトーキ Chair
USD549979S1 (en) 2005-06-07 2007-09-04 Steelcase Development Corporation Seating unit
US7806473B1 (en) 2005-11-21 2010-10-05 Faiks Frederick S Stackable chair and framework therefor
ES2255466A1 (en) * 2006-02-17 2006-06-16 Sellex. S.A Seat furniture has articulation elements supporting armor support of acierated sweep or profile relative to seat and armrest through individual horizontal axes parallel to intersection of seat and armrest planes
JP4896631B2 (en) * 2006-08-29 2012-03-14 株式会社イトーキ Chair
KR100754469B1 (en) 2006-12-14 2007-09-03 김성수 chair
BRPI0823265A2 (en) * 2007-01-29 2013-11-12 Miller Herman Inc SEAT STRUCTURE AND METHODS FOR USE
WO2008112918A1 (en) * 2007-03-13 2008-09-18 Hni Technologies Inc. Dynamic chair back lumbar support system
US20090096266A1 (en) * 2007-10-11 2009-04-16 Chun-Chang Tai Seat frame assembly
USD648150S1 (en) 2009-03-09 2011-11-08 Taku Kumazawa Chair
USD656333S1 (en) 2009-05-08 2012-03-27 Aichi Co., Ltd. Chair
USD617568S1 (en) 2009-03-09 2010-06-15 Aichi Co., Ltd. Chair
USD656334S1 (en) * 2009-05-08 2012-03-27 Aichi Co., Ltd. Chair
USD609487S1 (en) * 2009-05-08 2010-02-09 Aichi Co., Ltd. Chair
USD600465S1 (en) * 2009-03-09 2009-09-22 Aichi Co., Ltd. Chair
USD668072S1 (en) 2009-03-09 2012-10-02 Aichi Co., Ltd. Chair
US20100244515A1 (en) * 2009-03-31 2010-09-30 Dragomir Ivicevic Reclining Chair
USD669278S1 (en) 2009-05-08 2012-10-23 Aichi Co., Ltd. Chair
USRE42027E1 (en) 2009-05-08 2011-01-18 Aichi Co., Ltd Chair
AU2011250605B2 (en) 2010-05-05 2016-06-16 Allsteel Inc. Moveable and demountable wall panel system for butt-glazed wall panels
US9533766B2 (en) * 2011-05-20 2017-01-03 Zodiac Seats France Kinematic seat with elastic pivot
US9504326B1 (en) 2012-04-10 2016-11-29 Humanscale Corporation Reclining chair
WO2014144143A1 (en) 2013-03-15 2014-09-18 Hni Technologies Inc. Chair with activated back flex
USD731805S1 (en) * 2013-11-20 2015-06-16 B&B Italia S.P.A. Chair
CN106455824A (en) 2014-04-17 2017-02-22 Hni技术公司 Flex lumbar support
USD731833S1 (en) 2014-04-17 2015-06-16 Allsteel Inc. Chair
US9801470B2 (en) 2014-10-15 2017-10-31 Hni Technologies Inc. Molded chair with integrated support and method of making same
USD743180S1 (en) 2014-10-15 2015-11-17 Hni Technologies Inc. Chair
DE102016102556A1 (en) * 2016-02-15 2017-08-17 Interstuhl Büromöbel GmbH & Co. KG Backrest for an office chair
DE102016102557A1 (en) 2016-02-15 2017-08-17 Interstuhl Büromöbel GmbH & Co. KG Seating furniture with a backrest stop
US11266244B2 (en) * 2018-02-16 2022-03-08 Barrett Studios, Inc. Chair assembly
JP7083157B2 (en) * 2018-05-30 2022-06-10 愛知株式会社 Backrest and chair
US11253078B2 (en) * 2018-08-02 2022-02-22 Whiteside Mfg. Co Mobile chair
US12089741B2 (en) * 2019-06-17 2024-09-17 Quali Co., Ltd. Tiltable chair
JP7382178B2 (en) 2019-08-30 2023-11-16 株式会社イトーキ Chair
US20210146634A1 (en) * 2019-11-14 2021-05-20 Aussco Hong Kong Limited Three-dimensional loop structure by additive printing
CN111288869B (en) * 2020-02-28 2021-09-24 保隆(安徽)汽车配件有限公司 Novel go-no go gauge device
JP7685205B2 (en) * 2021-02-12 2025-05-29 愛知株式会社 Backrest
IT202100006467A1 (en) * 2021-03-18 2022-09-18 Pro Cord Spa CHAIR WITH OSCILLATING SEAT AND BACK

Family Cites Families (75)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US142145A (en) * 1873-08-26 Improvement in spring rocking-chairs
DE88021C (en) *
US346454A (en) * 1886-08-03 Willis baldwin
CA632397A (en) * 1961-12-12 Mackintosh Charles Nesting chairs
US790242A (en) * 1905-02-10 1905-05-16 Maurice W Yeager Swing.
US1191438A (en) * 1914-11-30 1916-07-18 Hale & Kilburn Co Car-seat construction.
US1791453A (en) * 1927-08-23 1931-02-03 Mies Ludwig Chair
DE552781C (en) * 1929-02-01 1932-06-16 Bruno Pollak Stackable chairs, tables or the like by sliding them horizontally into one another.
US1964519A (en) * 1933-07-21 1934-06-26 Sterling M Knudsen Adjustable seat construction
US2266897A (en) * 1938-06-20 1941-12-23 American Seating Co Chair
US2419838A (en) * 1941-12-15 1947-04-29 A M Albert Nesting chair
US2345926A (en) * 1942-06-03 1944-04-04 Posture Res Corp Back rest for chairs
US2532025A (en) * 1945-02-03 1950-11-28 Dorothy K S Johnson Resiliently mounted reclining chair
NL62657C (en) * 1945-04-13 1949-03-15
US2586951A (en) * 1945-08-23 1952-02-26 Dorothy K S Johnson Spring supported chair
US2512353A (en) * 1946-04-16 1950-06-20 Newburgh Metal Mfg Corp Reclining chair
US2617471A (en) * 1946-04-19 1952-11-11 Lorenz Anton Reclining article of furniture
US2637371A (en) * 1950-07-13 1953-05-05 Harold S Boutin Chair having resilient frame
FR60468E (en) * 1950-07-27 1954-11-03 Seat or chaise longue made of metal tubes, changeable and removable with elastically oscillating support frame
US2803291A (en) * 1954-04-22 1957-08-20 Alvin F Meyer Television chair
US2961035A (en) * 1954-05-26 1960-11-22 Lorenz Anton Article of repose for supporting the body of a person
GB754209A (en) * 1954-11-12 1956-08-01 Lea Bridge Ind Ltd Improvements in chairs
US2857958A (en) * 1955-03-30 1958-10-28 Shwayder Brothers Pivoted backrest
US2874755A (en) * 1955-05-02 1959-02-24 Marion J Smith Nesting chairs
US2838095A (en) * 1955-12-07 1958-06-10 Charles U Deaton Posture chairs
US2952300A (en) * 1957-07-15 1960-09-13 Morton R Cohen Chair construction
FR77026E (en) * 1957-10-09 1962-01-08 Seat or other items such as sofa, etc.
FR1196751A (en) * 1958-06-04 1959-11-26 Reclining seat
US3115368A (en) * 1962-04-26 1963-12-24 Emil J Paidar Company Chair structure and support
US3246927A (en) * 1963-12-02 1966-04-19 Edward J Klassen Stack chair
US3266843A (en) * 1965-06-14 1966-08-16 Maurice Davis Demountable chair
US3316016A (en) * 1966-05-18 1967-04-25 Schlumberger Ltd Stack chair
US3334942A (en) * 1966-05-20 1967-08-08 Jeffrey D Breslow Children's furniture or the like
US3446532A (en) * 1967-03-13 1969-05-27 Harold W Cramer Chair
US3482874A (en) * 1968-03-13 1969-12-09 North American Aluminum Corp Stadium bench
BE760088A (en) * 1969-12-17 1971-05-17 Giroflex Entwicklungs Ag Rocking chair
US3741607A (en) * 1970-10-05 1973-06-26 H Cramer Chair
US3822079A (en) * 1972-07-28 1974-07-02 H Probber Furniture having components which can be assembled in different ways
BR7207537D0 (en) * 1972-10-27 1973-01-16 G Facury A SET OF CONVERTIBLE AND STACKABLE FURNITURE FOR LIVING ROOM
US3815955A (en) * 1972-12-29 1974-06-11 Vecta Group Chair construction
US3847433A (en) * 1973-07-12 1974-11-12 American Seating Co Stacking chair
US3999802A (en) * 1975-03-17 1976-12-28 George Pyrke Powers Chair
US4131315A (en) * 1977-04-16 1978-12-26 Firma Drabert Sohne Chair with deformable armrest
JPS5932341Y2 (en) * 1977-08-25 1984-09-11 サンウエーブ工業株式会社 “Chu” Tufted Furniture Height Adjustment Mechanism
JPS567689A (en) * 1979-06-29 1981-01-26 Toshiba Corp Controller for flow rate of sludge drawn out of final sedimentation basin
US4529246A (en) * 1980-01-07 1985-07-16 Leib Roger K Patient chair
DE3100770A1 (en) * 1981-01-13 1982-08-12 Porsche, Ferdinand Alexander, 5662 Gries, Pinzgau Resting furniture, in particular armchair
DE3139448C2 (en) * 1981-10-03 1984-06-07 Kusch & Co Sitzmöbelwerke KG, 5789 Hallenberg chair
US4548441A (en) * 1982-01-22 1985-10-22 Ogg Richard K Stacking chair
US4522444A (en) * 1982-09-15 1985-06-11 Charles Pollock Stacking chair
US4570994A (en) * 1982-12-17 1986-02-18 Charles Lowrey Foldable chair
CH662257A5 (en) * 1983-07-20 1987-09-30 Syntech Sa WORK CHAIR.
US4545615A (en) * 1983-09-06 1985-10-08 Metropolitan Furniture Corp. Furniture construction with replaceable elastomeric covering
DE8401000U1 (en) * 1984-01-14 1984-04-05 Mauser Waldeck AG, 3544 Waldeck SWIVEL CHAIR
NZ208410A (en) * 1984-06-06 1989-02-24 Atlas Furniture Ltd Chair with dual independently adjustable pivotal backrest parts
CA1249503A (en) * 1984-06-08 1989-01-31 Paolo Favaretto Chair
JPS615165A (en) * 1984-06-16 1986-01-10 株式会社アイジー技術研究所 Siding board
DE3429186A1 (en) * 1984-08-08 1986-02-20 Uredat-Neuhoff, Angela, 4592 Lindern SEAT, IN PARTICULAR OFFICE CHAIR
IL73031A (en) * 1984-09-19 1986-11-30 Yaacov Kaufman Improved self adjusting chair
CH666169A5 (en) * 1985-09-02 1988-07-15 Andre Dupraz REINFORCEMENT ELEMENT FOR FURNITURE STRUCTURE.
US4744600A (en) * 1986-05-06 1988-05-17 Itoki Co., Ltd. Cushioning mechanism for use with seat of chair and interlocking cushioning mechanism for seat and backrest
US4648653A (en) * 1986-05-30 1987-03-10 Rowland David L Stackable armchair
US4711491A (en) * 1986-06-09 1987-12-08 Jonathan Ginat Swivel tilt mechanism for chair
IT206947Z2 (en) * 1986-06-12 1987-10-26 Pro Cord Srl CHAIR WITH ARTICULATED BACKREST
DE3635811A1 (en) * 1986-10-22 1988-05-05 Ver Spezialmoebel Verwalt Chair with a chair frame composed of profile sections
CH672882A5 (en) * 1987-06-09 1990-01-15 Syntech Sa
US4840426A (en) * 1987-09-30 1989-06-20 Davis Furniture Industries, Inc. Office chair
US4819986A (en) * 1988-02-10 1989-04-11 Markus Isidoro N Reclining chair with suspended seating
WO1989010080A1 (en) * 1988-04-25 1989-11-02 Perry Charles O Reclining chair
US5383712A (en) * 1988-04-25 1995-01-24 Perry; Charles O. Flexible chair
US5338094A (en) * 1988-04-25 1994-08-16 Perry Charles O Flexible reclining chair
US5180208A (en) * 1991-02-05 1993-01-19 Victor Lawandi Quick-disconnect knockdown furniture having a flexible support with a plurality of frame member storage pockets
US5131715A (en) * 1991-03-27 1992-07-21 Balles Rosemary K Mobile chair apparatus
US5308142A (en) * 1992-01-23 1994-05-03 Steelcase, Inc. Chair with arm mounted motion control
US5626394A (en) * 1995-06-07 1997-05-06 Perry; Charles O. Tubular chair frame

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JP3065274B2 (en) 2000-07-17
IL97762A0 (en) 1992-06-21
KR0182297B1 (en) 1999-05-01
IL97762A (en) 1994-08-26
AU651971B2 (en) 1994-08-11
JPH0815446B2 (en) 1996-02-21
EP0539377A1 (en) 1993-05-05
NZ237726A (en) 1994-08-26
JPH05507632A (en) 1993-11-04
ATE167369T1 (en) 1998-07-15
CA2080248C (en) 1996-10-29
CA2080248A1 (en) 1991-10-11
AU7691691A (en) 1991-10-30
WO1991015139A1 (en) 1991-10-17
JPH1033294A (en) 1998-02-10
ES2118081T3 (en) 1998-09-16
USRE36335E (en) 1999-10-12
DE69129628D1 (en) 1998-07-23
EP0539377A4 (en) 1993-06-16
DE69129628T2 (en) 1998-10-15

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