EP1331865A1 - Chaise pliante avec partie de siege sous tension - Google Patents

Chaise pliante avec partie de siege sous tension

Info

Publication number
EP1331865A1
EP1331865A1 EP00992239A EP00992239A EP1331865A1 EP 1331865 A1 EP1331865 A1 EP 1331865A1 EP 00992239 A EP00992239 A EP 00992239A EP 00992239 A EP00992239 A EP 00992239A EP 1331865 A1 EP1331865 A1 EP 1331865A1
Authority
EP
European Patent Office
Prior art keywords
seat support
seat
leg
legs
coupled
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Withdrawn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
EP00992239A
Other languages
German (de)
English (en)
Other versions
EP1331865A4 (fr
Inventor
Edward Zheng
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.)
Tofasco
Original Assignee
Tofasco
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 Tofasco filed Critical Tofasco
Publication of EP1331865A1 publication Critical patent/EP1331865A1/fr
Publication of EP1331865A4 publication Critical patent/EP1331865A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C4/00—Foldable, collapsible or dismountable chairs
    • A47C4/28—Folding chairs with flexible coverings for the seat or back elements
    • A47C4/286—Folding chairs with flexible coverings for the seat or back elements foldable side to side and front to back, e.g. umbrella type

Definitions

  • the field of the invention is collapsible furniture.
  • Folding chairs are relatively popular, because they can be stored with considerably reduced space requirements when compared to non-folding chairs. Nevertheless, folding chairs still require relatively large space, since the dimension of the folding chair is generally reduced only along one space coordinate (e.g., reduced length). To further reduce the space requirement, collapsible chairs have been developed, in which further size reduction is achieved by folding the chair along at least two space coordinates (e.g., length and width). Various collapsing chairs are known in the art.
  • Cook et al. describes in U.S. Pat. No. 5,921,621 a collapsible chair with a foldable backrest, in which the chair has four legs that support the corners of a flexible square seat. The legs are movably attached to each other at about their respective midpoints, and the seat is collapsed in width and depth by turning the legs around the midpoint. While Cooks chair is relatively easy to unfold and collapse, Cooks chair provides relatively little stability and is prone to tipping over.
  • Chen's chair advantageously collapses to a relatively compact form.
  • the position of the back support is limited to a vertical position, which may not be comfortable over a prolonged period.
  • Lee's chair provides an angled backrest, although it lacks a seat support entirely.
  • the present invention is directed to a collapsible chair that can be collapsed in a single motion, wherein the chair includes a tensioned seat coupled to a pair of seat support rods.
  • the collapsible chair has a pair of front legs, rear legs, and a pair of seat support rods wherein a backrest is coupled to the front legs, and a tensioned seat is coupled to the seat support rods.
  • the front legs, the rear legs, and the seat support rods are coupled in a manner such that the chair collapses in a single movement in which the front legs approximate each other when the rear legs and the seat support rods pivot towards the front legs.
  • contemplated chairs include a first front leg and a second front leg, a rear leg, a seat support rod, and a backrest attached to the front legs.
  • a first cross brace is rotatably coupled to the rear leg and slidably coupled to the first front leg
  • a second cross brace is rotatably coupled to the second front leg and slidably coupled to the seat support rod.
  • the seat support rod in contemplated chairs pivot in a first direction relative to the first front leg and the rear leg pivots in a direction opposite to the first direction when the first and second front legs approximate each other.
  • the chair has a second seat support rod, and a seat is attached to the seat support rods, wherein the seat is tensioned when the first and the second front legs move apart, and wherein the seat remains substantially tensioned when the seat supports a person.
  • the legs and seat support are manufactured from a metal, preferably aluminum, and the seat and backrest may be coupled together and are fabricated from a weather resistant material, preferably a synthetic polymer, and more preferably from Nylon.
  • a method of imparting collapsibility into a chair comprise one step in which a first and a second front leg, a first and a second seat support rod, and a first and a second rear leg are provided.
  • the first and the second front legs are coupled with a first cross brace, wherein the first cross brace is rotatably attached to the first front leg and slidably attached to the second front leg, and the first front leg and the second seat support rod are coupled with a second cross brace, wherein the second cross brace is rotatably attached to the first front leg and slidably attached to the second seat support rod.
  • the first front leg is rotatably coupled to the first rear leg and the first seat support rod, while the first seat support rod is slidably coupled to the first rear leg.
  • FIG. 1 is a perspective view of a collapsible chair without seat and backrest.
  • Fig. 2 is a perspective view of the collapsible chair of Fig. 1 with attached seat and backrest.
  • Fig. 3 is a perspective view of the collapsible chair of Fig. 1 in collapsed configuration.
  • Fig. 4 is a perspective view of another collapsible chair with tensioned seat and backrest.
  • Fig. 5 is a perspective view of the collapsible chair of Fig. 4 without tensioned seat and backrest.
  • a collapsible chair includes a tensioned seat coupled to a pair of seat support rods, and the chair can be collapsed in a single motion.
  • Contemplated chairs have a pair of front legs, rear legs, and a pair of seat support rods wherein a backrest is coupled to the front legs, and a tensioned seat is coupled to the seat support rods.
  • the front legs, the rear legs, and the seat support rods are coupled in a manner such that the chair collapses in a single movement in which the front legs approximate each other when the rear legs and the seat support rods pivot towards the front legs.
  • a collapsible chair 100 has a first front leg 110 and a second front leg 112, a rear leg 120, a seat support rod 130, and a backrest (not shown in Fig.l, see Fig.2).
  • a first cross brace 140 is rotatably coupled to the rear leg and slidably coupled to the first front leg 110
  • a second cross brace 150 is rotatably coupled to the second front leg 112 and slidably coupled to the seat support rod 130;
  • the backrest is attached to the first and second front legs 110 and 112, wherein the seat support rod 130 pivots in a first direction relative to the first front leg 110 and the rear leg 120 pivots in a direction opposite to the first direction when the first and second front legs 110 and 112 approximate each other.
  • the collapsible chair 200 further has a backrest 260 attached to the first and second front legs 210 and 212, and a seat 270 is attached to the seat support rods (not visible in Figure 2, see Figure 1).
  • Figure 3 depicts the collapsible chair 300 of Fig. 1 in a collapsed configuration.
  • An alternative embodiment of the inventive subject matter is depicted in Figure 4, in which a collapsible chair is depicted with a tensioned seat.
  • the chair of Figure 4 is shown without the tensioned seat.
  • the seat and the backrest are fabricated from a weather resistant material, preferably a woven synthetic polymer (e.g., Nylon) and is uniformly colored (e.g., blue).
  • a weather resistant material preferably a woven synthetic polymer (e.g., Nylon) and is uniformly colored (e.g., blue).
  • Particularly preferred seats have a width of about 21 inches and an overall length of about 24 inches.
  • a woven synthetic polymer e.g., Nylon
  • uniformly colored e.g., blue
  • Particularly preferred seats have a width of about 21 inches and an overall length of about 24 inches.
  • various alternative materials, colors, and sizes are also appropriate.
  • alternative materials may include natural and synthetic fabrics and all reasonable combinations thereof.
  • Contemplated materials may further be woven or non-woven and particularly contemplated materials include polyester, polyvinyl chloride, cotton, hemp, and wool.
  • suitable colors need not be restricted to uniform color, but appropriate colors may also include color patterns, prints, or no color at all.
  • the chair according to the inventive subject matter is sized and dimensioned to fit an average adult person, it is also contemplated that appropriate chairs may also accommodate a child, a smaller- or larger-than-average adult, or more than a single person.
  • alternative chairs may have dimensions that are wider than 21 inches, and suitable widths include 21-24, 24-30, and 30-40 inches, and wider, but also 18-21, 14-18, and 8-14 inches, and narrower.
  • the length of appropriate seats may vary between 20-42, 15-10, and 12-15 inches and less, but also between 24-27, 27-30, and more. It should further be appreciated that contemplated seats may also be tapered from the front end to the back end, or vice versa.
  • the backrest is fabricated from the same material as the seat, and that the backrest is removably or permanently coupled to the seat (e.g., sewed, coupled with a zipper, etc.)
  • the backrest has a width of about 21 inches.
  • a preferred height of the backrest is about 18 inches.
  • the width and height of suitable backrests may vary, and that width and height will depend among other things on the person's size and the number of persons to be seated in the chair.
  • alternative backrests may have a width between 18-12 inches and less, but also between 18-22 and more.
  • contemplated backrests may have a height between 12-18 inches and less, but also between 18- 25 inches and more.
  • the seat and the backrest may be coupled to the legs and seat support rods in numerous ways, including temporary and permanent coupling.
  • Temporary couplings include hook-and-loop type fasteners, snaps, buckles, slidable elements (e.g., a pouch slidably coupled to a post, a ring slidably coupled to a rod, etc.), and threadbly securable elements (e.g., laces threaded through rings).
  • Permanent couplings include sewed or glued elements.
  • the backrest may permanently coupled to the chair via a rivet.
  • the front end of the seat may be temporarily coupled to the front legs via ring-shaped openings slided over the top ends of the front legs. It is further, particularly preferred that the seat and the backrest are coupled together.
  • the attachment of the seat and/or the backrest to the chair may be directly or indirectly attached.
  • the term “direct” attachment means that the seat and/or the backrest are in immediate contact with the supporting structure, whereas the term “indirect” means that an additional element connects the seat and/or backrest with the supporting structure.
  • the seat may be directly attached to the seat support rods via a slidable pouch.
  • the seat may be indirectly coupled to the seat support rods via a ring-shaped opening in the seat that slidably engages with the rods.
  • legs, seat support rods, and cross braces of contemplated chairs may be manufactured from various materials, including metals, metal alloys, natural and synthetic polymers, and any reasonable combination thereof.
  • the legs, seat support rods, and cross braces are manufactured from black anodized aluminum tubing with a wall strength of about V 32 inch and an outer diameter of approximately 1 inch.
  • Preferred alternative materials include stainless steel, fiberglass, and wood.
  • slidable couplings are contemplated to be appropriate, and include a sliding sleeve, slide rails, guiding rings, etc.
  • a collapsible chair has two front legs, two rear legs, and two seat support rods, wherein a first pair of cross braces couples the front legs to the seat support rods, and a second pair of cross braces couples the front legs to the rear legs. It is particularly preferred, that all of the front legs, rear legs and seat support rods are coupled through the cross braces in a manner that allows collapsing the chair in a single movement, i.e., that the front legs approximate each other and the front end of the seat support rods rotates towards one end of the front legs, when the rear legs pivot towards the other end of the front legs.
  • the seat support rod pivots upwardly and the back leg pivots downwardly relative to the first front leg, when the chair is unfolded in an extended configuration. As viewed from another perspective, it is preferred that the seat and backrest fold when the front legs approximate.
  • a method of imparting collapsibility into a chair has one step in which a first and a second front leg, a first and a second seat support rod, and a first and a second rear leg are provided.
  • the first and the second front leg are coupled with a first cross brace, wherein the first cross brace is rotatably attached to the first front leg and slidably attached to the second front leg.
  • the first front leg is coupled with the second seat support rod with a second cross brace, wherein the second cross brace is rotatably attached to the first front leg and slidably attached to the second seat support rod.
  • the first front leg is rotatably coupled to the first rear leg and the first seat support rod, and in yet another step the first seat support rod is slidably coupled to the first rear leg.
  • the front leg on one side of the chair is coupled to the seat support rod on the other side of the chair via a cross brace, wherein the cross brace is on one end rotatably coupled to the front leg, and on the other end rotatably and slidably coupled to the seat support rod.
  • the front leg on the other side of the chair is coupled to the seat support rod on the opposite side of the chair via a cross brace, wherein the cross brace is on one end rotatably coupled to the front leg, and on the other end rotatably and slidably coupled to the seat support rod.
  • Both of the front legs are rotatably coupled to the respective seat support rods, wherein the coupling point to the front leg is located in about the middle of the length of the front leg, and wherein the coupling point to the seat support rod is located in about a third of the length of the seat support rod.
  • Each of the seat support rods is further rotatably and slidably coupled to the respective rear leg, wherein the point of coupling is approximately at the rear end (relative to the seat) of the seat support rod.
  • Both of the rear legs are rotatably coupled near their upper ends to the front leg, wherein the point of coupling is above the coupling point of the front leg to the seat support rod.
  • Another set of cross braces couples the upper end of the front legs with the lower end of the rear legs, wherein the coupling between the cross brace and the rear leg is rotatable, and the coupling between the cross brace and the rear leg is rotatable and slidable.
  • the number of legs, and/or seat supports may vary considerably.
  • the chair is sized and dimensioned to accommodate more than one person, three, four, or more legs, and/or seat supports may be included.
  • three or more seat support rods may be included in a chair with two front legs and two rear legs.
  • the number of cross braces may vary, and while some chairs may have only one pair of cross braces, other chairs may include three, four, or more cross braces.
  • the coupling may very depending on the particular configuration of contemplated chairs.
  • all of the couplings may be rotatable and slidable.
  • suitable couplings especially include temporary couplings such as snap connectors, connectors that are secured with a pin or other removable element, etc.
  • the coupling may be done via an intermediate rod, that rotatably couples two elements together (e.g., the intermediate rod that couples the front leg to the rear leg in Figure 2).
  • the seat is tensioned when the first and the second front legs move apart, and that the seat remains substantially tensioned when the seat supports a person.
  • tensioned seat means that the seat is substantially level when the chair is in the open configuration, wherein the term “substantially level” means that the vertical distance between any point of the seat and the seat support rod is no more than one 0.75 inch, more preferably no more than 0.5 inch, and most preferably no more than 0.25 inch.
  • open configuration refers to the configuration of the collapsible chair in which the front legs have a maximum distance from each other when the chair is opened using reasonable force (i.e. without damaging the mechanical structure).
  • the term “remains substantially tensioned” means that the vertical distance between the lowest point of the seat and the seat support rod increases no more than one inch, preferably no more than 0.75 inch, more preferably no more than 0.5 inch, and most preferably no more than 0.25 inch. Thus, it should be recognized that the tension of the seat is predominantly determined by the firmness of the material of the seat.
  • the tension in the seat remains substantially tensioned due to mechanically coupling an approximating movement of the seat support rods with a simultaneous movement of at least one of the rear legs relative to the front leg and a movement of the front legs relative to each other.
  • the prior art chairs with a seat support rod require at least two separate folding operations to collapse the chair, contemplated collapsing chairs are folded in a single movement (comparably to the collapsing of an umbrella).

Abstract

Cette invention concerne une chaise pliante (10) comportant un premier (110) et un second (112) pied avant, un pied arrière (120), une tige de maintien de siège (130), et un dossier fixé aux pieds avant. Les pieds et la tige de maintien de siège sont reliés entre eux par des compas (140, 150) de telle sorte que la tige de maintien de siège pivote dans un sens alors que le pied arrière pivote dans le sens opposé lorsque les pieds avant sont rapprochés l'un par rapport à l'autre. Selon un mode de réalisation préféré, les chaises selon l'invention comportent un siège qui est mis sous tension lorsque les pieds avant s'écartent et qui reste sensiblement sous tension lorsqu'une personne s'y assoit.
EP00992239A 2000-11-07 2000-11-07 Chaise pliante avec partie de siege sous tension Withdrawn EP1331865A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/041981 WO2002038010A1 (fr) 2000-11-07 2000-11-07 Chaise pliante avec partie de siege sous tension

Publications (2)

Publication Number Publication Date
EP1331865A1 true EP1331865A1 (fr) 2003-08-06
EP1331865A4 EP1331865A4 (fr) 2005-03-09

Family

ID=21742186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00992239A Withdrawn EP1331865A4 (fr) 2000-11-07 2000-11-07 Chaise pliante avec partie de siege sous tension

Country Status (2)

Country Link
EP (1) EP1331865A4 (fr)
WO (1) WO2002038010A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4014591A (en) * 1976-09-19 1977-03-29 Gold Medal, Inc. Collapsible chair
US4118065A (en) * 1977-08-29 1978-10-03 Watkins Mervyn M Folding patio chair

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA427677A (fr) * 1937-10-21 1945-05-22 B. O'connor John Chaise metallique repliable
US3635520A (en) * 1970-02-02 1972-01-18 Arnold L Roher Collapsible chair
FR2532535A1 (fr) * 1982-09-06 1984-03-09 Poulouin Armand Dispositif de siege pliable
DE19804546B4 (de) * 1997-02-12 2006-07-06 Karg, Peter W. In zwei Richtungen zusammenlegbarer Klappstuhl
US5984406A (en) 1997-05-16 1999-11-16 Lee; Howard Folding chair
US5921621A (en) 1998-07-21 1999-07-13 Cook; David G. Collapsible chair
TW401788U (en) 1999-06-05 2000-08-11 Ting Chin Ind Co Ltd Foldable chair

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4014591A (en) * 1976-09-19 1977-03-29 Gold Medal, Inc. Collapsible chair
US4118065A (en) * 1977-08-29 1978-10-03 Watkins Mervyn M Folding patio chair

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO0238010A1 *

Also Published As

Publication number Publication date
WO2002038010A1 (fr) 2002-05-16
EP1331865A4 (fr) 2005-03-09

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