EP2460439A1 - Chaise en plastique d'un seul tenant - Google Patents

Chaise en plastique d'un seul tenant Download PDF

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Publication number
EP2460439A1
EP2460439A1 EP11250899A EP11250899A EP2460439A1 EP 2460439 A1 EP2460439 A1 EP 2460439A1 EP 11250899 A EP11250899 A EP 11250899A EP 11250899 A EP11250899 A EP 11250899A EP 2460439 A1 EP2460439 A1 EP 2460439A1
Authority
EP
European Patent Office
Prior art keywords
seat
rib
chair
legs
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11250899A
Other languages
German (de)
English (en)
Inventor
Michael Andrew Fewchuk
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.)
Sebel Furniture Ltd
Original Assignee
Sebel Furniture Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sebel Furniture Ltd filed Critical Sebel Furniture Ltd
Publication of EP2460439A1 publication Critical patent/EP2460439A1/fr
Withdrawn legal-status Critical Current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
    • A47C5/00—Chairs of special materials
    • A47C5/12—Chairs of special materials of plastics, with or without reinforcement

Definitions

  • the present invention relates to chairs and, in particular, to integrally moulded, one piece plastic chairs.
  • plastic chairs were originally fabricated several decades ago, a plastic shell was moulded and this was screwed or otherwise connected to a steel frame which formed at least the legs of the chair.
  • Such plastic shells did not include substantial reinforcing ribs and were thus relatively flexible.
  • the metal legs were rigid and the shell could therefore flex relative to the frame and legs.
  • Such chairs are made by injection moulding and although the moulds for such chairs are very expensive, the individual chairs produced by such moulds are inexpensive and, if able to be sold in sufficiently large numbers, more than pays for the cost of the mould or tool.
  • Educational institutions including schools and universities are a large market for such chairs.
  • a prior art chair of this type is illustrated in Figs. 1 and 2 and is known from Australian Design Registration No. 316,934 (to which US Design Patent No. D607,654 corresponds).
  • the prior art chair 1 has a seat 2 and a backrest 3 and four legs 4-7 which are respectively a left front leg 4, a right front leg 5, a left rear leg 6 and a right rear leg 7.
  • the upper portions of the front legs 4, 5 are joined by a front rib 8 and the upper portions of the rear legs 6, 7 are joined by a rear rib 9.
  • This provides a strong cross brace for each pair of legs.
  • Both the front rib 8 and rear rib 9 extend across the underside of the seat 2 and are integrally formed with it. This has the consequence that the seat 2 is relatively rigid and so provides a firm support for the sitter.
  • the genesis of the present invention is a desire to provide an essentially similar chair to that of the chair 1 but in which the seat 2 exhibits some "give” or flexibility and so is able to deform under the weight of a sitter. This has the consequence that the seat 2 to some extent moulds itself to the shape of the sitter. This has the result that the chair is more comfortable for the sitter.
  • an injection moulded one piece plastic chair comprising:
  • the chair 11 of the preferred embodiment is illustrated with those portions of the chair 11 which are the same as the chair 1 being allocated like designation numbers.
  • the seat 2, backrest 3 and legs 4-7 are as before.
  • the front rib 8 which projects from the underside of the east 2 and interconnects the front legs 4, 5 is also unchanged.
  • the rear rib 19 which interconnects the rear legs 6, 7 is changed so as to be generally arcuate or U-shaped having a cross piece 20 and a right upright 21 and a left upright 22.
  • the lower forward edge of the rear rib 19 is provided with a thickened portion 25 to increase the rigidity of the rear rib 19.
  • the thickened portion 25 is hollow and is formed by injecting gas into the thickened portion 25 thereby reducing the amount of plastic contained in the rear rib 19 and allowing the rib to cool rapidly after moulding.
  • the thickened portion 25 (which adds to the rigidity of the cross-brace between the rear legs 6,7) compensates both for the material removed from the rib 19 (relative to the rib 9 of Fig. 2 ) so as to create the gap 24 and for the fact that the rib 19 is only connected to the seat 2 by means of the uprights 21 and 22.
  • Figs. 5 and 6 it will be seen from Fig. 5 that with the chair 11 unloaded, the gap 24 between the seat 2 and cross piece 20 of rib 19, is appreciable. However, as seen in Fig. 6 , with the chair 11 loaded by the weight of the sitter, the seat 2 has moved downwardly thereby reducing the size of the gap 24. This downward movement of the seat 2 allows the seat 2 to flex and to conform to some extent to the shape of the body of the sitter. This makes the seat 2 more comfortable and is thought to prolong sitter concentration. By comparison the seat of the prior art chair 1 of Fig. 1 and 2 is not "flat" or smooth because the presence of the rib 9 creates a corresponding inflexible ridge like undulation on the upper surface of the prior art seat which can be uncomfortable.
  • each of the ribs 29-109 can operate in conjunction with the air gap 24 and provide a sufficiently rigid cross-brace for the rear legs 6,7 because each rib's stiffness is greater than a simple planar rib (such as rib 9).
  • Each rib is illustrated in cross-sectional fashion in the same manner as Fig. 5 save that the cross-hatching is omitted.
  • the increase in stiffness is achieved by a single thickened region 25 which is preferably hollow.
  • the increase in stiffness is achieved by a kink or bend.
  • the increase in stiffness is achieved by both a kink and a thickened region 35 in the middle of the rib 39, the thickened region 35 again preferably being hollow.
  • the rib 47 is provided with a J-shaped profile or cross-sectional shape to provide the increase in stiffness.
  • the rib profiles 59 and 69 respectively are provided with a thickened region 55 and 65 which are respectively of circular and approximately tear drop cross-sectional shapes. Again, preferably both thickened regions 55 and 65 are hollow.
  • the corresponding rib profiles 79 and 89 are each provided with two thickened regions 75A, 75B and 85A, 85B respectively. These thickened regions extend in the same direction in Fig. 7F and in opposite directions in Fig. 7G .
  • the increase in stiffness is achieved by a double J (or S-shaped) profile for the rib 99.
  • the rib profile 109 is provided with three thickened regions 125A, 125B and 125C.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
EP11250899A 2010-12-01 2011-11-17 Chaise en plastique d'un seul tenant Withdrawn EP2460439A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2010246557A AU2010246557B2 (en) 2010-12-01 2010-12-01 One Piece Plastic Chair

Publications (1)

Publication Number Publication Date
EP2460439A1 true EP2460439A1 (fr) 2012-06-06

Family

ID=45218580

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11250899A Withdrawn EP2460439A1 (fr) 2010-12-01 2011-11-17 Chaise en plastique d'un seul tenant

Country Status (4)

Country Link
US (1) US20120267934A1 (fr)
EP (1) EP2460439A1 (fr)
CN (1) CN102525164A (fr)
AU (1) AU2010246557B2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2014201342A1 (en) * 2013-03-14 2014-10-02 Sebel Pty Ltd Injection Moulded Unupholstered Plastic Chair
USD801096S1 (en) 2016-01-13 2017-10-31 Paragon Furniture, Inc. Chair shell
USD818732S1 (en) 2016-01-13 2018-05-29 Paragon Furniture, Inc. Chair shell
USD801097S1 (en) 2016-01-13 2017-10-31 Paragon Furniture, Inc. Chair shell
USD808678S1 (en) 2016-01-13 2018-01-30 Paragon Furniture, Inc. Chair
USD802348S1 (en) 2016-01-13 2017-11-14 Paragon Furniture, Inc. Chair shell
USD809315S1 (en) 2016-01-13 2018-02-06 Paragon Furniture, Inc. Chair
USD808677S1 (en) 2016-01-13 2018-01-30 Paragon Furniture, Inc. Chair
US10427762B1 (en) * 2018-04-25 2019-10-01 Matthew Gregory Mosher Boat seat
USD939851S1 (en) * 2020-02-05 2022-01-04 Vs Vereinigte Spezialmoebelfabriken Gmbh & Co. Kg Seat of a chair

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2032061A5 (fr) * 1969-02-17 1970-11-20 Stamp
EP0196819A2 (fr) * 1985-03-18 1986-10-08 Sebel Furniture Ltd. Chaise
DE102006008133A1 (de) * 2006-02-20 2007-08-23 Karl Kilpper Gmbh Stapelmöbelstück
US20080116727A1 (en) * 2006-11-22 2008-05-22 Lewis Dorsey Cox Stackable chair assembly
WO2009090271A1 (fr) * 2008-01-14 2009-07-23 Resinas Olot, S.A. Chaise empilable améliorée
USD607654S1 (en) 2007-09-25 2010-01-12 Sebel Furniture Limited Chair

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3455605A (en) * 1967-10-23 1969-07-15 Shell Oil Co Prefabricated plastic chair and assembly method
US3989212A (en) * 1972-07-03 1976-11-02 Royal Seating Corporation Chair and supporting base for a seat
FR2638076B1 (fr) * 1989-03-01 1991-02-01 Grosfillex Sarl Siege monolithique en matiere plastique injectee
US6254190B1 (en) * 1999-09-29 2001-07-03 Peter G. G. Gregory Chair having a seat with differential front and rear support portions
US6969113B2 (en) * 2003-06-03 2005-11-29 Dennis Michael Krawchuk Folding chair with metal inserts
US7556317B2 (en) * 2004-04-28 2009-07-07 Homecrest Outdoor Living Llc Method of tensioning fabric and furniture construction
US7458641B2 (en) * 2005-07-29 2008-12-02 Agio International Company, Limited Single frame sling chair
US7971935B2 (en) * 2006-03-24 2011-07-05 Humanscale Corporation Ergonomic side chair
US7731295B2 (en) * 2006-11-29 2010-06-08 Peter Lin Chair having adjustable weight proportion accepting elements
US7458642B1 (en) * 2007-06-25 2008-12-02 Homecrest Outdoor Living, Llc Sling chair construction having non-weight bearing material and method of constructing same
US8333430B2 (en) * 2009-06-01 2012-12-18 Adams Mfg. Corp. Adirondack chair

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2032061A5 (fr) * 1969-02-17 1970-11-20 Stamp
EP0196819A2 (fr) * 1985-03-18 1986-10-08 Sebel Furniture Ltd. Chaise
DE102006008133A1 (de) * 2006-02-20 2007-08-23 Karl Kilpper Gmbh Stapelmöbelstück
US20080116727A1 (en) * 2006-11-22 2008-05-22 Lewis Dorsey Cox Stackable chair assembly
USD607654S1 (en) 2007-09-25 2010-01-12 Sebel Furniture Limited Chair
WO2009090271A1 (fr) * 2008-01-14 2009-07-23 Resinas Olot, S.A. Chaise empilable améliorée

Also Published As

Publication number Publication date
AU2010246557A1 (en) 2012-06-21
CN102525164A (zh) 2012-07-04
US20120267934A1 (en) 2012-10-25
AU2010246557B2 (en) 2014-07-03

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