CA2472070A1 - Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof - Google Patents

Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof Download PDF

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Publication number
CA2472070A1
CA2472070A1 CA002472070A CA2472070A CA2472070A1 CA 2472070 A1 CA2472070 A1 CA 2472070A1 CA 002472070 A CA002472070 A CA 002472070A CA 2472070 A CA2472070 A CA 2472070A CA 2472070 A1 CA2472070 A1 CA 2472070A1
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CA
Canada
Prior art keywords
support
housing
pivot
tilt
stem
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Granted
Application number
CA002472070A
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French (fr)
Other versions
CA2472070C (en
Inventor
Johann Burkhard Schmitz
Claudia Plikat
Nicolai Neubert
Carola E. M. Zwick
Roland R. O. Zwick
Chad D. Aerts
John F. Aldrich
Christopher C. Hill
Shane M. Ramsdell
James D. Slagh
Douglas M. Van De Riet
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MillerKnoll Inc
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Individual
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Priority to CA002626404A priority Critical patent/CA2626404C/en
Priority to CA2626453A priority patent/CA2626453C/en
Priority to CA2684418A priority patent/CA2684418C/en
Priority to CA002626409A priority patent/CA2626409C/en
Publication of CA2472070A1 publication Critical patent/CA2472070A1/en
Application granted granted Critical
Publication of CA2472070C publication Critical patent/CA2472070C/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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/024—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination
    • A47C1/027—Reclining or easy chairs having independently-adjustable supporting parts the parts, being the back-rest, or the back-rest and seat unit, having adjustable and lockable inclination by means of clamps or friction locking members
    • 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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/03—Reclining or easy chairs having independently-adjustable supporting parts the parts being arm-rests
    • 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
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • 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
    • 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
    • A47C7/02—Seat parts
    • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
    • 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
    • A47C7/02—Seat parts
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes
    • 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—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • 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
    • A47C7/54—Supports for the arms
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C9/00—Stools for specified purposes
    • A47C9/02—Office stools not provided for in main groups A47C1/00, A47C3/00 or A47C7/00; Workshop stools

Abstract

A tiltable chair including a housing, a back support pivotally attached to t he housing about a first horizontal axis and a seat support pivotally attached to the back support about a second horizontal axis and moveably supported by a curved track formed on the housing. A leaf spring includes a first end supported by the housing and a second end biasing the back support and seat support in an upward direction. Preferably, a fulcrum member, which includes a support surface having a curvilinear contour, is moveably supported in the housing and engages a bottom surface of the spring intermediate the first an d second ends of the spring. Preferably, a linkage mechanism including a first and second link is adapted to adjust the position of the fulcrum. In another preferred embodiment, a gear housing is removably disposed in said housing a nd coupled to the fulcrum. In one preferred embodiment, rearward and forward ti lt limiters are provided. In various preferred embodiments, the chair further includes a backrest having a plurality of openings, and armrests that are vertically, laterally and pivotally adjustable. In a preferred embodiment, a kit for assembling a seating structure includes a tilt housing having a plurality of connector arrangements comprising at least a first and second connector arrangement, a first seating arrangement having a first mounting arrangement configured to be connected to the first connector arrangement, a nd a second seating arrangement having a second mounting arrangement configured to be connected to the second connector arrangement.

Claims (150)

1. An armrest assembly for a seating structure comprising:
a support member comprising an upwardly extending curved spine portion having a first defined curvature;
a stem slidably disposed on said support member and comprising a curved portion having a second defined curvature corresponding to and mating with said first curvature of said spine portion, wherein said curved portion of said stem is slideably mated with said curved portion of said spine portion;
an armrest supported by said stem; and a latch mechanism moveable between at least an engaged position and a disengaged position, wherein said latch mechanism engages at least one of said stem and said support member to prevent movement therebetween when in said engaged position, and wherein stem is moveable relative to said support member when said latch mechanism is in the disengaged position.
2. The invention of claim 1 wherein one of said stem and said spine portion comprise a rack and wherein the latch mechanism is connected to the other of said stem and said spine portion, wherein said latch mechanism comprises a lever pivotably mounted to said other of said stem and said spine portion, said lever pivotable between said engaged and disengaged positions, wherein said lever comprises an engagement portion, wherein said engagement portion is engaged with said rack when said lever is in the engaged position, and wherein said engagement portion is disengaged from said rack when said lever is in the disengaged position.
3. The invention of claim 2 wherein said rack is disposed on said spine portion and said lever is pivotably mounted to said stem.
4. The invention of claim 3 wherein said rack comprises a sleeve mounted on said spine portion.
5. The invention of claim 1 further comprising an index member selectively engaging said at least one of said stem and said support member when said latch mechanism is in the disengaged position.
6. A method of adjusting the position of an armrest comprising:
providing a support member comprising an upwardly extending curved spine portion having a first defined curvature, and a stem slidably disposed on said support member and comprising a curved portion having a second defined curvature corresponding to and mating with said first curvature of said spine portion, an armrest supported by said stem, and a latch mechanism moveable between at least an engaged position and a disengaged position, wherein said latch mechanism engages at least one of said stem and said support member to prevent movement therebetween when in said engaged position;
moving said latch mechanism to said disengaged position;
sliding said curved portion of said stem relative to said curved spine portion while said latch mechanism is in said disengaged position; and moving said latch mechanism to said engaged position.
7. The invention of claim 6 wherein one of said stem and said spine portion comprise a rack and wherein the latch mechanism is connected to the other of said stem and said spine portion, wherein said latch mechanism comprises a lever pivotably mounted to said other of said stem and said spine portion, wherein said lever comprises an engagement portion, wherein said engagement portion is engaged with said rack when said lever is in the engaged position, and wherein said moving said latch mechanism to said disengaged position comprises pivoting said lever and thereby disengaging said engagement portion from said rack, and wherein said moving said latch mechanism to said engaged position comprises pivoting said lever and thereby engaging said engagement portion with said rack.
8. The invention of claim 7 wherein said rack is disposed on said spine portion and said lever is pivotably mounted to said stem.
9. The invention of claim 8 wherein said rack comprises a sleeve mounted on said spine portion.
10. The invention of claim 6 further comprising an index member selectively engaging said at least one of said stem and said support member when said latch mechanism is in the disengaged position.
11. An armrest assembly for a seating structure comprising:
a support member;
a stem slidably disposed on said support member and moveable relative to said support member;
an armrest supported by said stem;
a latch mechanism moveable between at least an engaged position and a disengaged position, wherein said latch mechanism engages at least one of said stem and said support member to prevent movement therebetween when in said engaged position, and wherein said stem is moveable relative to said support member when said latch mechanism is in the disengaged position; and an index member selectively engaging at least one of said support member and said stem when said latch mechanism is in the disengaged position as said stem is moved relative to said support member.
12. The invention of claim 11 wherein said at least one of said support member and said stem comprises a plurality of notches, wherein said index member successively, selectively engages at least one of said plurality of notches as said stem is moved relative to said support member.
13. The invention of claim 12 wherein one of said stem and said support member comprise a rack and wherein the latch mechanism is connected to the other of said stem and said support member, wherein said latch mechanism comprises a lever pivotably mounted to said other of said stem and said support member about a pivot axis, said lever pivotable between said engaged and disengaged positions, wherein said lever comprises an engagement portion, wherein said engagement portion is engaged with said rack when said lever is in the engaged position, and wherein said engagement portion is disengaged from said rack when said lever is in the disengaged position, and wherein said index member is pivotably mounted on said pivot axis.
14 The invention of claim 13 wherein said index member further comprises a bumper portion, wherein said bumper portion is engaged with said one of said stem and said support member when said lever is in the engaged position, and wherein said bumper portion is disengaged with said one of said stem and said support member when said lever is in the disengaged position.
15. The invention of claim 13 wherein said rack is disposed on said support member and said lever and said index member are pivotably mounted to said stem.
16. The invention of claim 15 wherein said rack comprises a sleeve mounted on said support member, and wherein said sleeve further comprises said plurality of notches.
17. A method of adjusting the position of an armrest comprising:
providing a support member, a stem slidably disposed on said support member, an armrest supported by said stem, a latch mechanism moveable between at least an engaged position and a disengaged position, wherein said latch mechanism engages at least one of said stem and said support member to prevent movement therebetween when in said engaged position, and wherein stem is moveable relative to said support member when said latch mechanism is in the disengaged position, and an index member selectively engaging at least one of said support member and said stem when said latch mechanism is in the disengaged position;
moving said latch mechanism to said disengaged position;
sliding said stem relative to said support member while said latch mechanism is in said disengaged position; and selectively engaging said at least one of said support member and said stem with said index member as said stem is slid relative to said support member.
18. The invention of claim 17 wherein said at least one of said support member and said stem comprises a plurality of notches, and wherein said selectively engaging said at least one of said support member and said stem comprises successively, selectively engaging at least one of said plurality of notches with said index member as said stem is moved relative to said support member.
19. The invention of claim 18 wherein one of said stem and said support member comprise a rack and wherein the latch mechanism is connected to the other of said stem and said support member, wherein said latch mechanism comprises a lever pivotably mounted to said other of said stem and said support member, wherein said lever comprises an engagement portion, wherein said engagement portion is engaged with said rack when said lever is in the engaged position, and wherein said moving said latch mechanism to said disengaged position comprises pivoting said lever to said disengaged position and thereby disengaging said engagement portion from said rack, and wherein said index member is pivotably mounted on said pivot axis, and further comprising pivoting said index member from a nonindexing position to an indexing position as said lever is pivoted to said disengaged position.
20. The invention of claim 19 wherein said index member further comprises a bumper portion, wherein said bumper portion is engaged with said one of said stem and said support member when said lever is in the engaged position, and wherein said bumper portion is disengaged with said one of said stem and said support member when said lever is in the disengaged position, and wherein said pivoting said index member from said nonindexing position to said indexing position comprises pivoting said bumper portion from an engaged position to a disengaged position.
21. The invention of claim 19 wherein said rack is disposed on said support member and said lever and said index member are pivotably mounted to said stem.
22. The invention of claim 21 wherein said rack comprises a sleeve mounted on said support member, and wherein said sleeve further comprises said plurality of notches.
23. An armrest assembly comprising:
a platform;
an armrest support moveably supported on said platform, wherein said armrest support is moveable relative to said platform between at least a first position and a second position;
a linear gear disposed on one of said platform and said armrest support and extending in a substantially horizontal direction;
a pinion gear rotatably mounted on the other of said platform and said armrest support about a substantially vertical rotation axis, wherein said pinion gear meshes with said linear gear as said armrest support is moved relative to said platform between said at least said first and second positions.
24. The invention of claim 23 wherein said linear gear comprises first and second linear gears disposed on said one of said platform and said armrest support, wherein said first and second linear gears are spaced apart in a parallel relationship, and wherein said pinion gear comprises a first and second pinion gear mounted on said other of said platform and said armrest support about spaced apart and parallel first and second substantially vertical rotation axes, wherein said first pinion gear meshes with said first linear gear and with said second pinion gear, and wherein said second pinion gear meshes with said second linear gear and said first pinion gear as said armrest support is moved relative to said platform between said at least said first and second positions.
25. The invention of claim 23 further comprising at least one guide member extending from one of said platform and said support member, and a track formed in the other of said platform and said armrest support, wherein said guide member moves within said track as said armrest support is moved relative to said platform between said at least said first and second positions.
26. The invention of claim 25 wherein said at least one guide member comprises a first and second guide member extending from said one of said platform and said support member in a spaced apart relationship, and wherein said at least one track comprises a first and second track formed in the other of said platform and said armrest support in a spaced apart relationship.
27. The invention of claim 23 further comprising a pawl member moveably mounted on one of said platform and said armrest support, wherein said pawl is moveable between an engaged position, wherein said pawl engages said pinion gear and whereby said pinion gear is prevented from rotating and a disengaged position wherein said pawl is disengaged from said pinion whereby said pinion gear is allowed to rotate.
28. The invention of claim 27 further comprising a spring biasing said pawl into said engaged position.
29. The invention of claim 23 wherein said platform comprises a first platform and further comprising a second platform disposed adjacent said first platform, wherein one of said first and second platforms comprises a protuberance, and the other of said first and second platforms comprises a plurality of recesses shaped to received said protuberance, and wherein said first platform is pivotally mounted to said second platform about a substantially vertical pivot axis spaced from said protuberance, wherein said first platform is pivotable relative to said second platform about said pivot axis between a plurality of pivot positions corresponding to said plurality of said recesses.
30. The invention of claim 29 wherein said first platform comprises a first member joined to a second member, wherein said one of said pinion gear and said linear gear are formed on said first member, and wherein said one of said protuberance and said plurality of recesses are formed on said second member.
31. A method of adjusting the position of an armrest comprising:
providing a platform, an armrest support moveably supported on said platform and moveable between at least a first position and a second position, a linear gear disposed on one of said platform and said armrest support and extending in a substantially horizontal direction, and a pinion gear rotatably mounted on the other of said platform and said armrest support about a substantially vertical rotation axis; and moving said armrest support relative to said platform between said at least said first and second position, and thereby meshing said pinion gear with said linear gear.
32. The invention of claim 30 wherein said linear gear comprises first and second linear gears disposed on said one of said platform and said armrest support, wherein said first and second linear gears are spaced apart in a parallel relationship, and wherein said pinion gear comprises a first and second pinion gear mounted on said other of said platform and said armrest support about spaced apart and parallel first and second substantially vertical rotation axes, and wherein said moving said armrest support relative to said platform between said at least said first and second position comprises meshing said first pinion gear with said first linear gear and with said second pinion gear, and meshing said second pinion gear with said second linear gear and said first pinion gear.
33. The invention of claim 31 further comprising at least one guide member extending from one of said platform and said support member, and a track formed in the other of said platform and said armrest support, and wherein said moving said armrest support relative to said platform between said at least said first and second position comprises moving said guide member within said track.
34. The invention of claim 33 wherein said at least one guide member comprises a first and second guide member extending from said one of said platform and said support member in a spaced apart relationship, and wherein said at least one track comprises a first and second track formed in the other of said platform and said armrest support in a spaced apart relationship and wherein said moving said guide member within said track comprises moving said first and second guide members within said first and second tracks respectively.
35. The invention of claim 31 further comprising providing a pawl member moveably mounted on one of said platform and said armrest support and moving said pawl between an engaged position, wherein said pawl engages said pinion gear whereby said pinion gear is prevented from rotating, and a disengaged position, wherein said pawl is disengaged from said pinion whereby said pinion gear is allowed to rotate.
36. The invention of claim 35 further comprising a spring biasing said pawl into said engaged position.
37. The invention of claim 31 wherein said platform comprises a first platform and further comprising a second platform disposed adjacent said first platform, wherein one of said first and second platforms comprises a protuberance, and the other of said first and second platforms comprises a plurality of recesses shaped to received said protuberance, and wherein said first platform is pivotally mounted to said second platform about a substantially vertical pivot axis spaced from said protuberance, and further comprising pivoting said first platform relative to said second platform about said pivot axis between a plurality of pivot positions corresponding to said plurality of said recesses.
38. A seating structure comprising:
a primary seat support having a rear portion and a front portion; and an auxiliary seat support having a rear portion and a front portion, wherein said rear portion of said auxiliary seat support is connected to said front portion of said primary seat support, said primary and auxiliary seat supports adapted to support the body of a user, wherein at least a portion of said auxiliary seat support is flexible, and wherein said front portion of said auxiliary seat support is moveable between at least a first and second position relative to said rear portion of said auxiliary seat support as said at least said flexible portion of said auxiliary seat support is flexed.
39. The invention of claim 38 wherein rear portion of said auxiliary seat support is pivotally connected to said front portion of said primary seat support.
40. The invention of claim 38 further comprising a linkage assembly connecting said front portion of said auxiliary seat support and one of said primary seat support and a housing, wherein said housing supports said primary seat support.
41. The invention of claim 40 wherein said linkage assembly comprises a first link pivotally mounted to said front portion of said auxiliary seat support at a first pivot axis and pivotally mounted to a second link at a second pivot axis spaced from said first pivot axis, wherein said second link is pivotally mounted to said one of said primary seat support and said housing at a third pivot axis spaced from said second pivot axis, wherein said second link is pivoted about said third pivot axis between at least a first and second pivot position as said front portion of said auxiliary seat support is moved between said at least said first and second position.
42. The invention of claim 41 wherein said first link has a track formed therein, and further comprising a guide member mounted to said one of said primary seat support and said housing, wherein said guide member is disposed in said track, wherein said first link moves relative to said guide disposed in said track as said front portion of said auxiliary seat support is moved between said at least said first and second position.
43. The invention of claim 42 wherein said track is a curvilinear slot formed in said first link.
44. The invention of claim 41 further comprising a lock device comprising a lock arm pivotally mounted to said front portion of said auxiliary seat support at a fourth pivot axis, wherein said lock arm comprises a plurality of notches shaped to releasably engage a latch member mounted on said one of said primary seat support and said housing.
45. The invention of claim 44 wherein said lock device further comprises a handle connected to said lock arm, and a spring biasing said lock arm into engagement with said latch member.
46. The invention of claim 38 wherein said auxiliary seat support comprises a rim portion and a plurality of laterally extending and longitudinally spaced ribs forming a recess with said rim, and further comprising a pad received in said recess.
47. The invention of claim 38 further comprising a one-piece, continuous flexible membrane secured to said primary and said auxiliary seat supports and defining a seat support surface adapted to contact the body of the user.
48. The invention of claim 47 wherein said membrane comprises a carrier member secured around at least a portion of a periphery of said membrane, wherein said carrier member is secured to said primary and auxiliary seat supports.
49. The invention of claim 40 further comprising a lock device releasably connected between said auxiliary seat support and said at least said one of said primary seat support and said housing in a plurality of lock positions including at least a first and second lock position corresponding to said at least said first and second position of said front portion of said auxiliary seat support, wherein said lock device maintains said position of said front portion of said auxiliary seat support when in one of said plurality of lock positions
50. A method for adjusting the depth of a seating structure comprising:
providing a primary seat support having a rear portion and a front portion, and an auxiliary seat support having a rear portion and a front portion, wherein said rear portion of said auxiliary seat support is connected to said front portion of said primary seat support, wherein at least a portion of said auxiliary seat support is flexible; and moving said front portion of said auxiliary seat support between at least a first and second position relative to said rear portion of said auxiliary seat support and thereby flexing said at least said flexible portion of said auxiliary seat support.
51. The invention of claim 50 further comprising locking said auxiliary seat support in one of a plurality of positions, including at least said first and second positions.
52. The invention of claim 50 further comprising providing a linkage assembly connecting said front portion of said auxiliary seat support and one of said primary seat support and a housing, wherein said housing supports said primary seat support, wherein said linkage assembly comprises a first link pivotally mounted to said front portion of said auxiliary seat support at a first pivot axis and pivotally mounted to a second link at a second pivot axis spaced from said first pivot axis, wherein said second link is pivotally mounted to said one of said primary seat support and said housing at a third pivot axis spaced from said second pivot axis, and wherein said moving said front portion of said auxiliary seat support between at least a first and second position relative to said rear portion of said auxiliary seat support comprises pivoting said second link about said third pivot axis between at least a first and second pivot position.
53. The invention of claim 52 wherein said first link has a track formed therein, and further comprising providing a guide member mounted to said one of said primary seat support and said housing, wherein said guide member is disposed in said track, and wherein said moving said front portion of said auxiliary seat support between at least a first and second position relative to said rear portion of said auxiliary seat support comprises moving said first link relative to said guide member as said guide member slides in said track.
54. A seating structure comprising:
a seat support comprising a forward portion, a rear portion and opposite, laterally spaced sides, wherein at least said forward portion is bendable about a substantially horizontal and laterally extending axis between at least a first and second position, wherein said forward portion has a greater curvature when in said second position compared with said first position; and a lock device moveable between at least an engaged position and a disengaged position, wherein said lock device maintains said seat support in one of said at least said first and second positions when in said engaged position, and wherein said seat support is bendable between said at least said first and second positions when said lock device is in said disengaged position.
55. The invention of claim 54 wherein said at least said forward portion that is bendable defines an upper, convex support surface.
56. A backrest for a seat structure, the backrest comprising:
a frame member;
a compliant, resilient back member having a top, a bottom and opposite sides, wherein said back member is mounted to said frame member, said back member comprising a lumbar region, a thoracic region disposed above said lumbar region, and a lower region disposed below the lumbar region, wherein said lumbar region comprises a first array of openings formed therethrough, said first array comprising a first plurality of staggered, elongated openings, wherein said first plurality of said first array openings are elongated in a direction from the top to the bottom of the back member, and wherein said thoracic region comprises a second array of openings formed therethrough, said second array comprising a second plurality of staggered, elongated openings, wherein said second plurality of said second array openings are elongated in a direction from the top to the bottom of the back member, wherein said first plurality of openings have a greater elongation on average than said second plurality of openings.
57. The invention of claim 56 wherein said lower region comprises a third array of openings formed therethrough, said third array comprising a third plurality of staggered, elongated openings, wherein said first plurality of openings have a greater elongation on average than said third plurality of openings.
58. The invention of claim 56 wherein back member has a first thickness at a center portion of said lumbar region and a second thickness at a peripheral side portion of said lumbar region, wherein said second thickness is greater than said first thickness.
59. The invention of claim 56 wherein said back member comprises a peripheral portion defining a periphery of said back member, wherein said peripheral portion comprises a plurality of openings formed therethrough.
60. The invention of claim 56 wherein said back member is bowed at said lumbar region.
61. The invention of claim 56 wherein said back member is made of polypropylene.
62. The invention of claim 56 wherein said top of said back member comprises a curved portion defining a convex forward body support surface along a peripheral portion of said back member.
63. The invention of claim 56 wherein said frame member is secured to said back member at a pair of spaced apart upper locations and a lower location.
64. The invention of claim 63 wherein said upper locations are spaced from said top of said back member.
65. The invention of claim 56 further comprising a lumbar support member connected to said frame and engaging a rear surface of said back member in said lumbar region thereof.
66. The invention of claim 65 wherein said lumbar support member comprises a laterally extending lumbar frame connected to said frame member and a flexible belt member mounted on said lumbar frame and engaging said rear surface of said back member.
67. The invention of claim 66 wherein said lumbar frame is bow shaped.
68. A backrest for a seating structure, the backcrest comprising:
a frame member comprising an upper support member and a lower support member spaced from said upper support member, said upper support member having opposite shoulder portions;
a fabric member having a front, body-supporting surface and a rear surface and comprising at least one pocket received on said opposite shoulder portions, and wherein said fabric member is connected to said lower support member and extends in tension between said upper and lower support members, and wherein said fabric member comprises a central thoracic region that is free of contact on said rear surface thereof.
69. The invention of claim 68 wherein said frame member comprises a central spine portion and wherein said opposite shoulder portion extend outwardly and forwardly therefrom.
70. The invention of claim 68 wherein said frame member further comprises a lumbar support disposed between said upper and lower portions, wherein said lumbar support engages said rear surface of said fabric.
71. The invention of claim 70 wherein said lumbar support comprises a frame member having opposite ends and a belt member extending between said opposite ends, and wherein said belt member engages said rear surface of said fabric.
72. A backrest for a seat structure, the backrest comprising:
a back member having a top, a bottom and opposite sides, said back member comprising a plurality of openings formed therein, wherein said plurality of openings transition from an obround shape to a peanut-shape to a substantially circular shape between first and second locations between said top and bottom, wherein said second location is spaced above said first location.
73. The invention of claim 72 wherein said plurality of openings further transition from said obround shape to said peanut-shape to said substantially circular shape between said first location and a third location between said top and bottom, wherein said third location is spaced below said first location.
74. A seating structure comprising:
a support housing comprising a wall and a pivot tube extending therethrough;
an insert member having an insect portion, wherein said insert member is moveably between a first position, wherein said insert member is not inserted into said tube, and a second position, wherein said insert member is inserted into said pivot tube with an interference fit, and wherein said pivot tube is expanded from a first shape to a second shape as said insert member is moved from said first position to said second position, and wherein said pivot tube is fixedly secured to said wall when said pivot tube is expanded to said second shape; and a seating component pivotally mounted on said insert member.
75. A method for assembling a seating structure comprising:
inserting a pivot tube through an opening formed in a support housing;
pivotally mounting a seating component on an insert member, wherein said insert member comprises an insert portion; and pressing said insert portion into said pivot tube with an interference fit and thereby expanding said pivot tube at said opening and fixedly securing said pivot tube to said support housing.
76. The invention of claim 75 wherein said seating component comprises a backrest.
77. A method for assembling a seating structure:
providing a pivot member extending from one of a seating component and a support, wherein said pivot member has an outer arced pivot surface formed at least around a portion of a periphery of said pivot member, wherein said outer pivot surface is defined by a radius and a first diameter and a first center defining a first pivot axis, and a key surface, at least a portion of said key surface formed at a first distance from said center, wherein said first distance is less than said radius;

providing a bearing member on the other of said seating component and said support, said bearing member having an opening defined by an inner arced pivot surface having a second radius, a second diameter, a second center defining a second pivot axis and a mouth having a width, wherein said width is less than said second diameter, wherein said width is less than said first diameter and wherein said width is greater than or equal to a sum of said first distance and said radius;
orienting said pivot member relative to said bearing member such that said at least said portion of said key surface defined by said first distance is substantially perpendicular to said mouth; and inserting said pivot member through said mouth and into said opening along a path substantially perpendicular to said first and second pivot axes until said first and second pivot axes are substantially coaxial; and rotating one of said seating component and said support such that said at least said portion of said key surface defined by said first distance is not substantially perpendicular to said mouth.
78. The invention of claim 77 wherein said key surface defines a chord of said outer arced pivot surface.
79. A chair comprising:
a housing comprising a track having a curvilinear support surface formed within a vertical plane;
a back support pivotally connected to said housing about a first horizontal axis; and a seat support pivotally connected to said back support about a second horizontal axis and moveably supported on said support surface of said track.
80. The invention of claim 79 wherein said seat support comprises a rotatable wheel, wherein said wheel engages said track.
81. The invention of claim 80 wherein said housing comprises a pair of said curvilinear tracks, and wherein said seat support comprises a pair of wheels engaging said tracks respectively.
82. The invention of claim 79 wherein at least a portion of said support surface of said track has a convex curvature.
83. A chair comprising:
a housing;
a seat support supported by said housing;
at least one leaf spring comprising a first end supported by said housing and a second end biasing said seat support in an upward direction, wherein said at least one leaf spring flexes within a substantially vertical first plane;
and a fulcrum member moveably supported by said housing and having a support surface engaging said at least one leaf spring between said first and second ends, wherein said support surface is not symmetrical about any laterally extending second vertical plane oriented substantially perpendicular to said first plane.
84. The invention of claim 83 further comprising a back support pivotally connected to said seat support at a first pivot axis, wherein said at least one leaf spring biases said seat support and said back support in said upward direction.
85. A chair comprising:
a housing;
a back support pivotally connected to said housing about a first horizontal axis;
a seat support pivotally connected to said back support about a second horizontal axis;
at least one leaf spring comprising a first end supported by said housing and a second end biasing said back support and said seat support in an upward direction; and a fulcrum member moveably supported by said housing and having a curvilinear support surface engaging said at least one leaf spring between said first and second ends, wherein a tangent of any point along said support surface slopes rearwardly and downwardly.
86. The invention of claim 85 wherein at least a portion of said support surface forms an arc.
87. The invention of claim 86 wherein said arc has a radius of between about 5 inches and 7 inches.
88. A chair comprising:
a housing;
a seat support supported by said housing;
at least one leaf spring comprising a first end supported by said housing and a second end biasing said seat support in an upward direction;
a fulcrum member moveably supported by said housing and having a support surface engaging said at least one leaf spring between said first and second ends; and a linkage assembly comprising a first and second link pivotally connected to said housing about a first pivot axis, said first link pivotally and slidably connected to said fulcrum at a second pivot axis spaced from said first pivot axis and said second link pivotally and slidably connected to said fulcrum at a third pivot axis spaced from said first and second pivot axes.
89. The invention of claim 88 wherein one of said fulcrum and said first link has a first track, wherein one of said fulcrum and said second link has a second track, and wherein the other of said fulcrum and said first and said links has a first and second guide member disposed in said first and second tracks respectively and defining said second and third pivot axes respectively.
90. The invention of claim 89 wherein said fulcrum is moveable in opposite first and second directions, and further comprising an actuator comprising an actuator member moveable in opposite third and fourth directions substantially perpendicular to said first and second directions, wherein said actuator member pivotally and slideably connected to said first and second links at fourth and fifth pivot axes respectively, wherein said fourth pivot axis is spaced from said first and second pivot axis and wherein said fifth pivot axis is spaced from said first and third pivot axis.
91. The invention of claim 90 wherein said actuator further comprises a screw threadably engaging said actuator member, wherein said screw is rotatable in a first and second rotational direction, wherein rotation of said screw in said first direction moves said actuator member in said third direction and wherein said rotation of said screw in said second direction causes said actuator member to move in said fourth direction.
92. The invention of claim 90 wherein one of said actuator member and said first link has a third track, wherein one of said actuator member and said second link has a fourth track, and wherein the other of said actuator fulcrum and said first and said links has a third and fourth guide member disposed in said third and fourth tracks respectively and defining said fourth and fifth pivot axes respectively.
93. The invention of claim 92 wherein said housing comprises a first bracket having a fifth and sixth track, wherein said fifth and sixth tracks are curved, wherein said first and second guide members are slidably disposed in said fifth and sixth tracks respectively.
94. The invention of claim 93 wherein said housing further comprises a second bracket having a seventh and eighth track, wherein said seventh and eighth tracks are curved, wherein said third and fourth guide members are slidably disposed in said seventh and eighth tracks respectively.
95. The invention of claim 94 wherein said fifth and sixth tracks have a radius substantially equal to the distance between the first and second pivot member and the first pivot axis respectively, and wherein said seventh and eighth tracks have a radius substantially equal to the distance between the third and fourth pivot member and the first pivot axis respectively.
96. A method for assembling a seating structure comprising:
providing an annular bushing having first and second opposite ends and comprising a first annular flange extending radially outward therefrom adjacent said first end thereof;
disposing a plurality of tilt control housing components on said bushing and abutting said first flange with at least one of said plurality of components; and deforming said second end of said bushing and thereby forming a second annular flange extending radially outward from said bushing; and capturing said plurality of tilt control housing components between said first and second flanges.
97. A seating structure comprising:
a housing;
a support member pivotally mounted to said housing;
a tilt limiter member moveably mounted to one of said housing and said support member;
a stop member connected to the other of said support member and said housing; and an actuator mechanism coupled to said one of said housing and said support member, said actuator mechanism comprising a spring having a first and second arm, a drive link pivotally mounted to said one of said housing and said support member about a first axis and engaging said first arm of said spring at a first location spaced from said first axis, a follower link pivotally mounted to said one of said housing and said support member about a second axis spaced from said first axis and engaging said second arm of said spring at a second location spaced from said second axis, and said follower link pivotally coupled to said tilt limiter member.
98. The invention of claim 97 wherein said actuator mechanism further comprises a coupling link pivotally connected to said follower link at a third axis and pivotally connected to said tilt limiter at a fourth axis spaced from said third axis.
99. The invention of claim 97 wherein support member comprises a bracket, and wherein said drive link and said follower link are pivotally mounted to said bracket, wherein said tilt limiter member is moveably mounted to said support member, and wherein said stop member is connected to said housing.
100. The invention of claim 99 wherein said stop member comprises a plurality of steps, wherein said tilt limiter member is moveable to a plurality of positions wherein said tilt limiter member selectively engages at least one of said plurality of steps when in one of said plurality of positions.
101. The invention of claim 97 wherein said stop member has a downwardly facing stop surface and said tilt limiter has an upwardly facing bearing surface engaging said stop surface.
102. The invention of claim 97 wherein said stop member has at least one upwardly facing stop surface and said tilt limiter has a downwardly facing bearing surface engaging said at least one stop surface.
103. The invention of claim 97 wherein said drive link comprises a rack formed therealong, and an indexing member selectively and releasably engaged with said rack.
104. The invention of claim 103 wherein said indexing member comprises a cantilevered spring having a free end selectively and releasably engaged with said rack.
105. The invention of claim 97 wherein said actuator mechanism comprises a drive shaft connected to said drive link, wherein said drive shaft is rotatably mounted to said one of said housing and said support member about said first axis, and further comprising a grippable member mounted to an end of said drive shaft.
106. The invention of claim 97 wherein said tilt limiter member comprises a first and second tilt limiter member moveably mounted to one of said housing and said support member, wherein said stop member comprises a first and second stop member connected to the other of said support member and said housing, and wherein said actuator mechanism comprises first and second springs each having a first and second arm, spaced apart first and second drive links each pivotally mounted to said one of said housing and said support member about said first axis and engaging said first arm of said first and second springs respectively at first locations on each of said first and second drive links spaced from said first axis, first and second follower links, wherein said first follower link is pivotally mounted to said one of said housing and said support member about said second axis and wherein said second follower link is pivotally mounted to one of said housing and said support member about a third axis spaced from said first axis, wherein said first and second follower links engage said second arms of said first and second springs respectively at second locations on each of said first and second follower links spaced from said second axis, and said first and second follower links pivotally coupled to said first and second tilt limiter members respectively.
107. The invention of claim 106 wherein said actuator mechanism comprises a first and second drive shaft connected to said first and second drive links respectively, wherein said first and second drive shafts are coaxially and rotatably mounted to said one of said housing and said support member about said first axis.
108. The invention of claim 106 wherein said second and third axes are coaxial.
109. A kit for assembling a seating structure comprising:
a tilt housing having a plurality of connector arrangements comprising at least a first and second connector arrangement;
a first seating arrangement having a first mounting arrangement configured to be connected to said first connector arrangement; and a second seating arrangement having a second mounting arrangement configured to be connected to said second connector arrangement.
110. The invention of claim 109 wherein said first seating arrangement comprises a seat pivotally connected to a back at a first pivot axis, wherein said first mounting arrangement comprises a first pivot structure formed on said back, and wherein said first connector arrangement comprises a second pivot structure configured for pivotal connection to said first pivot structure.
111. The invention of claim 110 wherein said first mounting arrangement further comprises a third pivot structure formed on said seat, and wherein said first connector arrangement comprises a fourth pivot structure configured for pivotal connection to said third pivot structure.
112. The invention of claim 111 wherein said fourth pivot structure comprises a guide configured to translatably support said third pivot structure.
113. The invention of claim 112 wherein said guide comprises a fender connected to said tilt housing.
114. The invention of claim 109 wherein said first seating arrangement comprises a seat connected to a back, wherein said first mounting arrangement comprises a linkage assembly pivotally connected to at least one of said seat and back and defining a first plurality of pivot structures, and wherein said first connector arrangement comprises a second plurality of pivot structures, wherein said first plurality of pivot structures is configured for pivotal connection to said second plurality of pivot structures.
115. The invention of claim 109 wherein said first connector arrangement and said first mounting arrangement form a three-bar slide configuration, and wherein said second connector arrangement and said second mounting arrangement form a four-bar configuration.
116. A method of assembling a seating structure comprising:
providing a tilt housing having a plurality of connector arrangements comprising at least a first and second connector arrangement;
selecting one of a first and second seating arrangements, wherein said first seating arrangement comprises a first mounting arrangement configured to be connected to said first connector arrangement, and wherein said second seating arrangement comprises a second mounting arrangement configured to be connected to said second connector arrangement; and connecting said selected one of said first and second seating arrangements to said tilt housing.
117. The invention of claim 116 wherein said selecting said one of said first and second seating arrangements comprises selecting said first seating ~
arrangement, wherein said first seating arrangement comprises a seat pivotally connected to a back at a first pivot axis, wherein said first mounting arrangement comprises a first pivot structure formed on said back, and wherein said first connector arrangement comprises a second pivot structure formed on said tilt housing, and wherein said connecting said selected one of said first and second seating arrangements to said tilt housing comprises pivotally connecting said first pivot structure to said second pivot structure.
118. The invention of claim 117 wherein said first mounting arrangement further comprises a third pivot structure formed on said seat, and wherein said first connector arrangement comprises a fourth pivot structure, and wherein said connecting said selected one of said first and second seating arrangements to said tilt housing further comprises pivotally connecting said third pivot structure to said fourth pivot structure.
119. The invention of claim 118 wherein said fourth pivot structure further comprises a guide configured to translatably support said third pivot structure.
120. The invention of claim 119 wherein said guide comprises a fender connected to said tilt housing.
121. The invention of claim 116 wherein said selecting said one of said first and second seating arrangements comprises selecting said first seating arrangement, wherein said first seating arrangement comprises a seat connected to a back, wherein said first mounting arrangement comprises a linkage assembly pivotally connected to at least one of said seat and back and defining a first plurality of pivot structures, and wherein said first connector arrangement comprises a second plurality of pivot structures, wherein said connecting said selected one of said first and second seating arrangements to said tilt housing comprises pivotally connecting said first plurality of pivot structures to said second plurality of pivot structures.
122. The invention of claim 116 wherein said first connector arrangement and said first mounting arrangement form a three-bar slide configuration, and wherein said second connector arrangement and said second mounting arrangement form a four-bar configuration.
123. A seating structure comprising:
a tilt housing having a support surface;
a back support pivotally connected to said tilt housing about a first pivot axis; and a tilt limiter pivotally connected to said tilt housing about a second pivot axis, said tilt limiter having a bearing surface spaced from said second pivot axis, said bearing surface supported by said support surface of said tilt housing.
124. A seating structure comprising:
a tilt housing;
a back support pivotally connected to said tilt housing about a first pivot axis, wherein said back support is pivotable about said first pivot axis in a first and second direction, said back support having a forwarding facing edge and a top and bottom surface formed along said edge;
a forward tilt limiter pivotally connected to said tilt housing about a second pivot axis, said forward tilt limner pivotable between at least a first and second forward tilt position, wherein said forward tilt limiter engages said top surface of said back support when in at least one of said first and second forward tilt positions and thereby limits the pivoting of said back support in said first direction;
a rear tilt limiter pivotally connected to said tilt housing about a third pivot axis, said rear tilt limiter pivotable between at least a first and second rear tilt position, wherein said rear tilt limiter engages said bottom surface of said back support when in at least one of said first and second rear tilt positions and thereby limits the pivoting of said back support in said second direction.
125. A seating structure comprising:
a tilt housing;
a seating structure pivotally connected to said tilt housing;
a biasing member applying a biasing force to said seating structure as said seating structure is pivoted relative to said tilt housing;
an adjustment mechanism operably connected to said biasing member, wherein said adjustment mechanism is operable to adjust said biasing force applied by said biasing member, said adjustment mechanism comprising a gear housing removably disposed in said tilt housing and rotatably connected to said tilt housing about an axis, said gear housing comprising first and second locator portions abutting said tilt housing, wherein said first locator portion prevents said gear housing from moving relative to said tilt housing in a first direction, and wherein said second locator portion prevents said gear housing from rotating relative to said tilt housing about said axis.
126. The invention of claim 125 wherein said first locator portion further prevents said gear housing from moving relative to said tilt housing in a second direction substantially perpendicular to said first direction.
127. The invention of claim 126 wherein said biasing member applies a force to said gear housing and thereby prevents said gear housing from moving in a third direction substantially perpendicular to said first and second directions.
128. The invention of claim 127 wherein said adjustment mechanism comprises a drive shaft extending from said gear housing, wherein said drive shaft is coupled to a fulcrum member, wherein said biasing member comprises a leaf spring engaging said fulcrum member.
129. The invention of claim 125 wherein said adjustment mechanism comprises first and second meshing gears disposed in said gear housing.
130. A method of assembling a seating structure comprising:
providing a tilt housing and a seating structure pivotally connected to said tilt housing;
rotatably connecting a gear housing to said tilt housing about an axis;
abutting a first locator portion of said gear housing against said tilt housing so as to prevent said gear housing from moving relative to said housing in a first direction; and abutting a second locator portion of said gear housing against said tilt housing so as to prevent said gear housing from rotating about said axis.
131. The invention of claim 130 wherein said first locator portion further prevents said gear housing from moving relative to said tilt housing in a second direction substantially perpendicular to said first direction.
132. The invention of claim 130 further comprising installing a biasing member and thereby applying a biasing force to said seating structure as said seating structure is pivoted relative to said tilt housing, and applying a force with said biasing member to said gear housing so as to thereby prevent said gear housing from moving in a third direction substantially perpendicular to said first and second directions.
133. The invention of claim 132 further comprising providing a drive shaft extending from said gear box, wherein said drive shaft is coupled to a fulcrum member, wherein said biasing member comprises a leaf spring engaging said fulcrum member, and wherein said applying said force with said biasing member to said gear housing comprises applying said force with said biasing member to said gear housing by way of said fulcrum and said drive shaft.
134. A support member for a seating structure component, support member comprising:
a first support member having a first plurality of spaced apart fins;
a second support member having a second plurality of spaced apart fins;
wherein said first support member is secured to said second support member with said first plurality of fins nested between said second plurality of fins.
135. The invention of claim 134 further comprising a back member connected to at least one of said first and second support members.
136. The invention of claim 134 further comprising a back support member moveably coupled to at least one of said first and second support members.
137. The invention of claim 136 wherein said first and second support members form a gap therebetween, wherein said back support member comprises a engaging member disposed through said gap.
138. The invention of claim 137 wherein said back support member comprises a lumbar support.
139. A seating structure comprising:
a base;
a seat supported by said base and moveable between a normal tilt position and a forward tilt position;
a backrest supported by said base and moveable between a normal position and at least one rear tilt position;

a forward tilt limiter coupled to at least one of said seat and backrest to limit the movement of the seat between the normal and forward tilt positions, said forward tilt limiter moveable between a normal setting and a forward tilt setting;
a rear tilt limiter coupled to at least one of the seat and backrest to limit the movement of the backrest between the normal and the at least one rear tilt position, said rear tilt limiter moveable between a normal setting and at least one rear tilt setting;
a forward tilt actuator coupled to the forward tilt mechanism, wherein said forward tilt actuator is oriented in generally the same orientation as the seat, and wherein the position of the forward tilt actuator is indicative of the setting of the forward tilt limiter; and a rear tilt actuator coupled to the rear tilt mechanism, wherein said rear tilt actuator is oriented in generally the same orientation as the backrest, wherein the position of the rear tilt actuator is indicative of the setting of the rear tilt limiter, and wherein said rear tilt actuator is positioned adjacent said forward tilt actuator in generally the same relationship as the seat and backrest.
140. The invention of claim 139 wherein said rear tilt actuator has generally the same shape as the backrest.
141. The invention of claim 139 wherein said forward tilt actuator has generally the same shape as the seat.
142. A control device for an adjustable seating structure, the control device comprising:
a first adjustment control positioned in an orientation approximating a seating member, said first adjustment control moveable about a horizontal axis;

a second adjustment control positioned adjacent the seat adjustment control in an orientation approximating a backrest member, said second adjustment control moveable about said horizontal axis, wherein said first adjustment control and said second adjustment control in combination generally resemble a seating structure.
143. The invention of claim 142 wherein said second adjustment control is generally shaped like the backrest member.
144. The invention of claim 142 wherein said first adjustment control is coupled to a forward tilt limiter, and wherein said second adjustment control is coupled to a rear tilt limiter.
145. A kit for assembling a seating structure comprising:
a back member;
a back support member;
a first support configuration adapted to be coupled to said back support member and adapted to support said back member; and a second support configuration adapted to be coupled to said back support member and adapted to support said back member, wherein said second support configuration provides different support to said back member when coupled to said back support member than said first support configuration.
146. The invention of claim 145 wherein said first and second support configurations are each adapted to be adjustable coupled to said back support member.
147. The invention of claim 146 wherein said back support member comprises a spine member, and wherein said first and second support configurations are adapted to be slidably mounted on said spine member.
148. A method of assembling a seating structure comprising:
providing a back member, a back support member, a first support configuration and a second support configuration, wherein said second support configuration is different than said first support configuration;
selecting one of said first and second support configurations;
coupling said selected one of said first and second support configurations to said back support member; and supporting said back member with said selected one of said first and second support configurations.
149. The invention of claim 148 wherein said coupling said selected one of said first and second support configurations to said back support member comprises adjustably coupling said selected one of said first and second support configurations to said back support member.
150. The invention of claim 149 wherein said back support member comprises a spine member, and wherein said adjustably coupling said selected one of said first and second support configurations to said back support member comprises slidably mounting said selected one of said first and second support configurations on said spine member.
CA2472070A 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof Expired - Lifetime CA2472070C (en)

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Application Number Priority Date Filing Date Title
CA002626404A CA2626404C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
CA2626453A CA2626453C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
CA2684418A CA2684418C (en) 2002-02-13 2003-02-12 Back support structure
CA002626409A CA2626409C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof

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US35647802P 2002-02-13 2002-02-13
US60/356,478 2002-02-13
US41857802P 2002-10-15 2002-10-15
US60/418,578 2002-10-15
PCT/US2003/004074 WO2003068025A2 (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and asjustable seat depth, and methods for the use thereof

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CA002626409A Division CA2626409C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
CA002626404A Division CA2626404C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
CA2684418A Division CA2684418C (en) 2002-02-13 2003-02-12 Back support structure
CA2626453A Division CA2626453C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof

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CA2472070A Expired - Lifetime CA2472070C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
CA2626453A Expired - Lifetime CA2626453C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
CA2684418A Expired - Lifetime CA2684418C (en) 2002-02-13 2003-02-12 Back support structure
CA002626409A Expired - Lifetime CA2626409C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
CA002626404A Expired - Lifetime CA2626404C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof

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CA2684418A Expired - Lifetime CA2684418C (en) 2002-02-13 2003-02-12 Back support structure
CA002626409A Expired - Lifetime CA2626409C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof
CA002626404A Expired - Lifetime CA2626404C (en) 2002-02-13 2003-02-12 Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof

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AU (5) AU2003216239B2 (en)
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CA2684418C (en) 2012-07-31
US7213886B2 (en) 2007-05-08
AU2007234517B2 (en) 2010-04-01
US7213880B2 (en) 2007-05-08
AU2003216239B2 (en) 2007-08-16
US20030178882A1 (en) 2003-09-25
AU2010202761A1 (en) 2010-07-22
WO2003068025A2 (en) 2003-08-21
GB0515244D0 (en) 2005-08-31
AU2007234518B2 (en) 2010-11-11
DE10397009A5 (en) 2014-11-13
GB0515246D0 (en) 2005-08-31
US7425037B2 (en) 2008-09-16
CA2684418A1 (en) 2003-08-21
US20060091714A1 (en) 2006-05-04
US7841666B2 (en) 2010-11-30
GB2400312B (en) 2006-07-26
GB2413954B (en) 2006-07-19
CA2626409A1 (en) 2003-08-21
GB2400312A (en) 2004-10-13
GB0414694D0 (en) 2004-08-04
AU2007234516A1 (en) 2007-12-06
CA2626404C (en) 2010-02-02
US20090127905A1 (en) 2009-05-21
GB2414391B (en) 2006-09-13
CA2626404A1 (en) 2003-08-21
US20040183350A1 (en) 2004-09-23
CA2626453A1 (en) 2003-08-21
US7419222B2 (en) 2008-09-02
GB2413954A (en) 2005-11-16
DE10392285T5 (en) 2005-05-12
GB2414176B (en) 2006-09-13
AU2007234518A1 (en) 2007-12-06
DE10397011A5 (en) 2014-11-13
US7249802B2 (en) 2007-07-31
US20060103208A1 (en) 2006-05-18

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