EP1787549B1 - Coussin d'assise présentant un confort amélioré - Google Patents

Coussin d'assise présentant un confort amélioré Download PDF

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Publication number
EP1787549B1
EP1787549B1 EP05110984A EP05110984A EP1787549B1 EP 1787549 B1 EP1787549 B1 EP 1787549B1 EP 05110984 A EP05110984 A EP 05110984A EP 05110984 A EP05110984 A EP 05110984A EP 1787549 B1 EP1787549 B1 EP 1787549B1
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EP
European Patent Office
Prior art keywords
expanded
cushion according
polymer
container
cushion
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EP05110984A
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German (de)
English (en)
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EP1787549A1 (fr
Inventor
Silvano Grassi
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    • 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
    • A47C7/021—Detachable or loose seat cushions
    • 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
    • A47C7/18—Seat parts having foamed material included in cushioning part

Definitions

  • the present invention relates to a sitting cushion with improved comfort.
  • Cushions with improved comfort are currently known which are adapted particularly but not exclusively for use in the medical field for invalids, ill people, etc, who remain lying down or sitting down for a long time.
  • Bedsores are dystrophic lesions of the skin determined by prolonged mechanical compression of the skin between a contact surface and a substantially subcutaneous bone surface.
  • Immobilization of the inpatient is the basic causative factor of these sores, since it facilitates general and local morphofunctional modifications: the ill person cannot change position on his own and no longer perceives the awkward position.
  • the traditional method for preventing bedsores consists in changing position approximately every two or three hours, monitoring the trophic condition of the skin and of the contact points.
  • Cushions with improved comfort of the known type comprise, enclosed within a cover, at least one airtight hermetic container made of flexible material, which contains at least one layer of open-cell polymeric foam and at least one layer of expanded polymer, such as sponge rubber or the like.
  • the layer of open-cell polymeric foam can be for example made of expanded polyurethane treated with unsaturated acrylic resin.
  • This material is particularly suitable, because it has a certain slow shape memory which makes it self-modeling, i.e., easy to shape without particular rebound forces, therefore having more a supporting function than a load-bearing function.
  • US-A-5 390 384 discloses a seating system for use with wheelchairs, including a rigid shaped tray having a forward section to support the user's thighs and a rearward section with a depressed, contoured seating well that supports the user's buttocks including his ischial tuberosities, and that includes a bottom portion and a U-shaped rim portion extending about it.
  • the aim of the present invention is to provide a sitting cushion with improved comfort which is capable of reducing the load on the regions that are most subject to bedsores, maintaining the advantages of softness and self-shaping of known types of cushion.
  • an object of the invention is to provide a cushion which has an improved bedsore prevention action and can also modify the anteroposterior posture and the balancing suitable for the patient.
  • Another object is to provide a cushion in which the comfort requirements can be changed easily both during production and at the user's premises, depending on the needs of the inpatient or the like.
  • Another object of the present invention is to provide a sitting cushion with improved comfort which can also be used every day and can be associated with pieces of furniture such as armchairs, office chairs, sofas and the like.
  • Another object is to provide a cushion composed of elements which are easily available and can be manufactured at low cost with conventional facilities and equipment.
  • a sitting cushion with improved comfort as defined in claim 1 and in the depending claims.
  • a sitting cushion with improved comfort according to the invention in a first embodiment, is generally designated by the reference numeral 10 and is shown in cross-section in Figure 3 .
  • the cushion 10 comprises, within a cover 11, a first anatomically contoured element 14 made of expanded polymer, which forms a sitting portion 15.
  • the first element 14 made of expanded polymer has, at the ischiopubic and sacral region of a user, a compartment 16, which is open upward and downward.
  • the compartment 16 accommodates the padding 19 made of expanded polymer.
  • the hermetic container 17 is made of a polymer in electrically heat-bonded film form.
  • Said polymer is preferably thermoplastic polyurethane.
  • the first expanded polymer element 14 is generally made of sponge rubber or the like or of polyurethane.
  • the layer 18 of polymeric foam in the example of embodiment described here, is made of expanded polyurethane treated with unsaturated acrylic resin.
  • this material has a certain slow shape memory which allows it to be shaped without particular forces in the points of highest loading.
  • the anatomically contoured shape of the cushion 10, the first expanded polymer element 14 whereof is anatomically standardized, is then personalized by a self-modeling system formed by the container 17 and, when present, by the additional container 112, without having to exaggerate the amount of air inside the containers 17 and 112, which would cause instability in the posture of the user.
  • the first expanded polymer element 14, which forms the sitting portion 15, is provided with ergonomic lateral side walls 20 for guiding toward a correct posture for the user.
  • FIG. 1 A second embodiment of the invention is shown in Figure 4 and designated by the reference numeral 110 therein.
  • the cushion 110 has, in a compartment 116, a hermetic container 112, which is airtight and made of a flexible material which contains a layer 113 of open-cell polymeric foam.
  • the hermetic container 112 and the first element 114 are arranged below a container 117 which contains a layer of polymeric foam 118 made of expanded polyurethane treated with unsaturated acrylic resin.
  • the cushion 110 therefore offers, by means of the first expanded polymer element 114, greater support for the inpatient in the areas surrounding the ischiopubic and sacral regions, so that said ischiopubic and sacral region rests without being compressed by the weight of the body on the additional container 112.
  • a third embodiment of the cushion is designated by the reference numeral 210 in Figure 5 .
  • a hermetic container 212 and, together with it, a padding 219 made of expanded polymer are provided within a compartment 216 of the first element 214 made of expanded polymer.
  • the expanded-polymer padding 219 is selectively made of expanded polyurethane, polyurethane agglomerate or other similar and equivalent materials, which are adapted to lift and support the ischiopubic and sacral region in order to modify the posture without however reducing comfort.
  • the weight shifted forward is matched by a reduced need for cushioning air at the back.
  • a valve is coupled to at least one of the containers 17, 117, 112 and 212 in order to adjust the amount of air that is present inside the container.
  • valve By means of said valve, not shown for the sake of simplicity, it is possible to adjust the amount of the air inside the containers, i.e., the amount of air that is present in the cells of the layers 18 and 113 of polymeric foam, and thereby reduce the amount of self-modeling capacity of the respective containers 17 and 112.
  • the cover 11, 111 and 211 is a cover made of cellular mesh in order to facilitate breathability and is provided with a zip fastener 21, 121 and 221, or with a Velcro ® closure, in order to allow quick extraction of the various elements contained therein.
  • the hermetic enclosure 112 and 212 with a layer 113 and 213 of polymeric foam, is interchangeable with a similar complementary-shaped container having a different thickness, depending on requirements and needs of the inpatient.
  • the expanded-polymer padding 19 and 219 is interchangeable with one or more additional expanded-polymer paddings having a different thickness and/or different density.
  • the present invention provides a sitting cushion with improved comfort which can spread evenly the load on the entire surface, privileging the regions that are most subject to bedsores and maintaining the advantages of softness and self-modeling of known types of cushion.
  • the present invention provides a cushion which has an improved bedsore prevention action.
  • the present invention provides a cushion in which the comfort requirements can be changed easily both during manufacture and at the user's premises, according to requirements of the inpatient or the like.
  • the present invention provides a sitting cushion with improved comfort which is intended for everyday use and can be associated with pieces of furniture such as armchairs, office armchairs, sofas and the like.
  • the sitting portion described in the invention can in fact be given any size and accordingly can also be incorporated in per se known types of furniture, or a cushion according to the invention can simply be kept separate but on hand for easy and straightforward use whenever the sitting position entails a certain discomfort of the anatomical parts in contact.
  • the present invention provides a cushion composed of elements which are easily available and can be manufactured at low cost with conventional facilities and equipment.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Mattresses And Other Support Structures For Chairs And Beds (AREA)

Claims (15)

  1. Coussin d'assise (10, 110, 210) présentant un confort amélioré, du type comportant, enfermés dans une housse (11, 111, 211),
    - au moins une enveloppe hermétique (17, 117) étanche à l'air, faite d'une matière souple, qui contient au moins une couche (18, 118) de mousse de polymère à alvéoles ouvertes,
    - et au moins un élément (14, 114, 214) en polymère expansé tel que du caoutchouc mousse ou analogue,
    ledit élément (14, 114, 214) en polymère expansé constituant une partie formant assise (15) qui a, dans la région ischio-pubienne et la région sacrée d'un utilisateur, un compartiment (16, 116, 216) et, disposé(s) à l'intérieur dudit compartiment (16, 116, 216), au moins un parmi une enveloppe hermétique supplémentaire (112, 212) étanche à l'air, laquelle enveloppe hermétique supplémentaire (112, 212) étanche à l'air contient une couche (113, 213) de mousse de polymère, ou un rembourrage (19, 219) en polymère expansé, ou encore une combinaison de ceux-ci, ladite au moins une enveloppe hermétique (17, 117) étanche à l'air étant disposée au-dessus dudit élément (14, 114, 214) en polymère expansé et au-dessus de ladite enveloppe hermétique supplémentaire (112, 212) étanche à l'air ou dudit rembourrage (19, 219) en polymère expansé, ou de ladite combinaison de ceux-ci.
  2. Coussin selon la revendication 1, caractérisé en ce que ledit compartiment (16, 116, 216) est ouvert au moins vers le haut.
  3. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce que dans ledit compartiment (16) ne se trouve que ledit rembourrage (19) en polymère expansé.
  4. Coussin selon une ou plusieurs des revendications 1 et 2, caractérisé en ce que dans ledit compartiment (116) ne se trouve que ladite enveloppe hermétique (112) étanche à l'air, laquelle contient une couche (113) de mousse de polymère.
  5. Coussin selon une ou plusieurs des revendications 1 et 2, caractérisé en ce que ledit au moins un rembourrage (219) en polymère expansé est disposé à l'intérieur dudit compartiment (216), ainsi que ladite enveloppe hermétique supplémentaire (212) avec ladite couche (213) de mousse de polymère.
  6. Coussin selon la revendication 5, caractérisé en ce que ledit rembourrage (219) en polymère expansé est fait de polyuréthane expansé ou de polyuréthane aggloméré ou autres matières similaires et équivalentes.
  7. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce qu'une valve est montée sur au moins une desdites enveloppes hermétiques (17, 117, 112, 212) étanches à l'air afin d'ajuster la quantité d'air présente à l'intérieur de l'enveloppe hermétique (17, 117, 112, 212) étanche à l'air de façon à éviter une instabilité.
  8. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite enveloppe hermétique supplémentaire (112, 212) étanche à l'air avec ladite couche de mousse de polymère est interchangeable avec une enveloppe similaire d'une forme complémentaire ayant une épaisseur différente.
  9. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce que lesdites enveloppes hermétiques (17, 112, 212) sont en polymère sous la forme d'un film thermosoudé électriquement.
  10. Coussin selon la revendication 9, caractérisé en ce que ledit polymère est du polyuréthane.
  11. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite au moins une couche (18, 113) de mousse de polymère est enfermée dans l'enveloppe respective (17, 112, 212).
  12. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce que la mousse de polymère à alvéoles ouvertes de la couche (18, 113) est du polyuréthane expansé traité avec une résine acrylique insaturée.
  13. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce que ledit élément (14) en polymère expansé à profil anatomique est fait de polyuréthanne expansé, de polyuréthane aggloméré ou analogue.
  14. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce que ladite housse (11) est une housse en résille ou autre matière apte à respirer au moins à sa surface.
  15. Coussin selon une ou plusieurs des revendications précédentes, caractérisé en ce que l'élément (14) en polymère expansé qui constitue la partie formant assise (15) est pourvu de parois latérales ergonomiques (20) pour guider un utilisateur vers une bonne posture.
EP05110984A 2005-11-18 2005-11-18 Coussin d'assise présentant un confort amélioré Active EP1787549B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05110984A EP1787549B1 (fr) 2005-11-18 2005-11-18 Coussin d'assise présentant un confort amélioré

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05110984A EP1787549B1 (fr) 2005-11-18 2005-11-18 Coussin d'assise présentant un confort amélioré

Publications (2)

Publication Number Publication Date
EP1787549A1 EP1787549A1 (fr) 2007-05-23
EP1787549B1 true EP1787549B1 (fr) 2013-01-16

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8141957B2 (en) 2008-12-15 2012-03-27 La-Z-Boy Incorporated Cushion with plural zones of foam
IE20090204A1 (en) * 2009-03-18 2010-10-27 Patrick Noel Daly Infection control cushion structure
DE102016108014A1 (de) * 2016-04-29 2017-11-02 Odenwald-Chemie Gmbh Kissen
US10399473B1 (en) * 2018-06-04 2019-09-03 Donna Kay Moseley Portable armrest for vehicle drivers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371997A (en) * 1980-08-25 1983-02-08 Mattson Roy D Adjustable firmness cushion with multiple layered foam-filled compartments
US4753480A (en) * 1986-08-14 1988-06-28 Morell Theodore R Pad assembly for wheelchairs
US5352023A (en) * 1992-09-16 1994-10-04 Jay Medical, Ltd. Seating and back systems for a wheelchair

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370769A (en) * 1980-09-19 1983-02-01 Herzig Ralph B Cushion utilizing air and liquid
US4930171A (en) * 1989-05-03 1990-06-05 International Healthcare Products, Inc. Contour retaining support cushion
US5390384A (en) 1993-08-13 1995-02-21 Jay Medical Ltd. Self-adjusting seating system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4371997A (en) * 1980-08-25 1983-02-08 Mattson Roy D Adjustable firmness cushion with multiple layered foam-filled compartments
US4753480A (en) * 1986-08-14 1988-06-28 Morell Theodore R Pad assembly for wheelchairs
US5352023A (en) * 1992-09-16 1994-10-04 Jay Medical, Ltd. Seating and back systems for a wheelchair

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