EP0678263A1 - Luftmatratze - Google Patents

Luftmatratze Download PDF

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Publication number
EP0678263A1
EP0678263A1 EP95400101A EP95400101A EP0678263A1 EP 0678263 A1 EP0678263 A1 EP 0678263A1 EP 95400101 A EP95400101 A EP 95400101A EP 95400101 A EP95400101 A EP 95400101A EP 0678263 A1 EP0678263 A1 EP 0678263A1
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EP
European Patent Office
Prior art keywords
mattress
elastic
connecting means
mattress according
wires
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.)
Granted
Application number
EP95400101A
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English (en)
French (fr)
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EP0678263B1 (de
Inventor
Etienne Leflaive
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of EP0678263A1 publication Critical patent/EP0678263A1/de
Application granted granted Critical
Publication of EP0678263B1 publication Critical patent/EP0678263B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses
    • A47C27/081—Fluid mattresses of pneumatic type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses
    • A47C27/087—Fluid mattresses with means for connecting opposite sides, e.g. internal ties or strips

Definitions

  • the invention relates to an air mattress of the kind which has two main walls connected along their periphery to form a closed sealed chamber, and at least one valve for the introduction of a gas under pressure, in particular of compressed air. , in said room.
  • the term "mattress” will mainly be used in the description and the claims, but this term should be understood in a broad sense as encompassing any device of the mattress, cushion, box spring, etc. type. intended to be placed between a support and a load to be supported or lifted.
  • the airbags used to lift loads like jacks, also belong to the field of the invention.
  • the main property required of such a device of the mattress, cushion or box spring type is to have a certain deformability under load in order to distribute the stresses existing between the load (person or object) and the mattress, according to an area contact greater than that which would be obtained if said load was placed on a rigid support.
  • these stresses are distributed in a more continuous and more uniform manner thanks to the deformation of the mattress.
  • the deformability of the mattress is obtained by the choice of the constituent material, deformable in compression and / or in shear with a greater or lesser reversibility.
  • Air mattresses are a family of devices whose behavior is fairly close to reversibility. They are very useful for storage and transport, both because they are foldable and compact when deflated, and because they are relatively light. However, their stress distribution performance is limited by their very structure. The air mattresses known to date have indeed several drawbacks.
  • the very mechanism of deformation under load limits the performance of stress distribution.
  • the depression of a surface element of the inflatable mattress leads, on the one hand, to transmit the inflation pressure to the supported body over the extent of the depressed area, and on the other hand, to create an effect of membrane due to the normal component of the tension of the wall deformed by localized depression.
  • the calculation shows that this membrane effect is weak when there is no significant local depression causing a high angular deformation of the wall compared to its rest position.
  • the air mattress leads, on the contact surface with the supported body, to a uniform pressure equal to the inflation pressure. There is no way to act on this distribution.
  • a third drawback also results from the mechanism described above: when a surface element has started to sink, the only factor which can increase the resistance depending on the sink is the membrane effect, if one admits that the internal pressure of the mattress remains constant which is practically the case when the deformation is localized and therefore only causes a slight variation in the overall volume.
  • This type of mattress cannot accept both, under good conditions, either a distributed load, such as a lying person, or a more localized load such as a seated person.
  • a distributed load such as a lying person
  • a more localized load such as a seated person.
  • the comfort of a lying person requires a relatively low pressure in the mattress, pressure which will be insufficient to resist the action of a seated person; such a localized charge will lead to the complete insertion of the mattress under the loaded area and the coming into contact of the opposite walls.
  • a conventional air mattress does not make it possible to offer, under the effect of a load, a sufficiently progressive, that is to say a reaction starting from a zero value at the start of the deformation, and increasing with it.
  • a second family of mattresses is known, the behavior of which is also fairly close to reversibility and which makes it possible to obtain an increasing reaction with the deformation.
  • These are mattresses made of a deformable material such as a pile of fibers, or juxtaposition of springs, combination of flexible blades, cellular rubber, etc.
  • the mattresses of this second family have a much larger size and self-weight than a conventional air mattress, which is an obstacle for storage during periods of non-use and for transport. Furthermore, it is not possible to slide them in a flattened state under a load in order to lift it, as is possible with a deflated air mattress.
  • the object of the invention is, above all, to provide an air mattress which, while retaining the advantages of conventional air mattresses for storage and transport, makes it possible to offer a progressive reaction as a function of the deformation.
  • the invention also aims to allow control of the stress distribution and contact performance greater than that obtained with conventional mattresses.
  • the subject of the invention is an air mattress comprising two main walls connected along their periphery to constitute a sealed closed chamber, and at least one valve for the introduction of a pressurized gas, in particular of compressed air, into said chamber, the internal faces opposite the main walls being connected by a plurality of connection means suitable for working in traction, characterized in that the connection means are elastic with significant elongation under tension, the inflation pressure being chosen to separate the walls a sufficient distance to make the elastic connection means work in tension, said distance being greater than the length of said connection means in the non-tensioned state.
  • the elastic connections allow, on the one hand the control of the geometry of the mattress without using partitions and, on the other hand, create an elastic reaction of the mattress when it is subjected to an external pressure.
  • the elastic connecting means are elastic threads; the elastic connecting means have an elongation before rupture at least equal to 100% and preferably greater than 300%.
  • the arrangement is such that when the mattress is inflated, the elastic connection means are substantially orthogonal to the main walls.
  • the elastic connecting means have the same length, in the non-stretched state.
  • the elastic means have different lengths in the non-stretched state, so as to create different reactions depending on the zones of the mattress.
  • the surface density of the elastic connection means is at least equal to one connection means per cm2 of wall and less than or equal to 20 connection means per cm2 of wall; an average surface density corresponds to an average distance between the connecting means of approximately 5 mm.
  • the mattress is produced using a double-walled textile consisting of two textile plies made airtight, the warp and weft yarns of each ply being standard or high tenacity yarns having elongations at relatively low break, while the elastic means of connection between the two plies are elastic threads having an elongation before break greater than 100%.
  • the invention also relates to a method of manufacturing a mattress as defined above in which the connecting means are transverse elastic threads, this process being characterized by the fact that said transverse threads are put in place at " tight wire ".
  • the invention consists, apart from the arrangements set out above, of a certain number of other arrangements of which it will be more Explicitly question below about an exemplary embodiment described with reference to the accompanying drawing, but which is in no way limiting.
  • Figure 1 of this drawing is a perspective diagram, with parts broken away, of an air mattress according to the invention, in the deflated state.
  • Figure 2 shows, also in perspective, the mattress according to the invention in the inflated state, with parts torn off.
  • Figure 3 is a longitudinal section of a mattress made with a double-walled textile.
  • Figure 4 is a sectional diagram of an area of the inflated mattress, at rest.
  • Figure 5 finally shows, similarly to Figure 4, the area of the inflated mattress, subjected to a load.
  • an air mattress 1 having two main walls respectively upper and lower 2, 3 connected along their periphery by a side wall 4.
  • These walls 2, 3 and 4 are made of flexible flexible material, so that when the mattress 1 is deflated, as illustrated in FIG. 1, the walls 2 and 3 can come to bear against each other, the side wall 4 being folded, the thus flattened together which can itself be folded or rolled for easy storage.
  • At least one inflation valve 5 is provided for the introduction of a pressurized gas, in particular air, into the sealed closed chamber 6 delimited by the walls 2, 3 and 4.
  • the facing internal faces 2 a , 3 a of the main walls 2, 3 are connected by a plurality of elastic connecting wires 7 with significant elongation under tension.
  • the elastic threads 7 have an elongation before breaking at least equal to 100% and preferably greater than 300%.
  • the inflation pressure of the mattress 1 is chosen so as to separate the walls 2, 3 by a distance 1 sufficient to make the elastic threads 7 work in traction. In other words, the distance 1 is greater than the length, in the untensioned state, of the wires 7.
  • the wires 7 are preferably substantially orthogonal to the main walls 2, 3.
  • the surface density of the wires 7, on the faces 2 a , 3 a is at least equal to 1 wire per square centimeter of wall 2 or 3. This density is preferably less than or equal to 20 wires per square centimeter of wall.
  • the average distance e between the connecting wires 7 is around 5 mm.
  • the air mattress does not need to have a structure of juxtaposed elements such as contiguous tubes, used for conventional mattresses.
  • the mattress of the invention therefore makes it possible to ensure good continuity of the distribution of the stresses on the surface of the support wall 2 or 3.
  • Double-walled textile 2, 3 consisting of two textile plies 9, 10 linked together by a plurality of elastic threads 7.
  • the two textile sheets 9, 10 are made airtight by coating and / or bonding and / or any other sealing means.
  • Double-walled textiles are known and described, for example, in an article "USE OF THREE-DIMENSIONAL MATERIALS" by J.C. Malézieux published in the journal TUT (Textiles for technical use, 4th quarter 1991, n ° 2, pages 25 to 27).
  • the connecting threads between the two plies are standard or high tenacity textile threads having low elongations before breaking, generally between 8 and 20% and leading to very low elongations in service given the inflation pressures generally used and which are not taken into account in practice.
  • the connecting threads between the two plies are not elastic threads within the meaning of the invention.
  • the connecting son 7 between the plies 9, 10 are made of elastic son with great elongation before breaking, for example greater than 300% and which can reach 400% or 500%.
  • Such elastic threads 7 are known in the clothing industry for producing elastic garments.
  • the plies 9 and 10 are produced with threads 11 of warp and 12 of conventional weft, standard or high tenacity. These warp and weft threads are chosen according to the weaving criteria and the sealing ability. Take for example standard polyester flat yarn of 1,100 decitex with ten warp threads per centimeter and 10 weft threads per centimeter.
  • the connecting wires 7 are on the other hand elastic wires, for example of 600 dtex with an average modulus, between 0 and 200% elongation, of 0.2.10 ⁇ 2 N / tex (0.2 gf / tex).
  • a module of 10 ⁇ 2 N / tex (or 1gf / tex) means that a wire of 1 tex subjected to a force of 10 ⁇ 2 N will undergo an elongation of 100%.
  • the density of the connecting wires is 10 per square centimeter.
  • the distance between the plies 9 and 10, with the wires 7 stretched is chosen for example equal to 300 mm.
  • the thickness of the mattress When the mattress is inflated to a pressure of 100.102 Pa (100 gf / cm2) the thickness of the mattress, that is to say the distance between the plies 9 and 10, is approximately 180 mm. A pressure exerted on the mattress will produce, regardless of the membrane effect, a depression of 8 mm for each pressure increment of 10.102 Pa (10 gf / cm2), up to the pressure of 100.102 Pa (100 gf / cm2).
  • This value of 5 mm can be increased by choosing a longer length of connecting wires for the same inflation pressure.
  • the inflatable mattress structure according to the invention after sealing the walls 2, 3 and 4, has a thickness which is highly variable as a function of the inflation pressure, due to the elongation capacity of the connecting wires 7.
  • FIG. 4 illustrates a fraction of the mattress 1 inflated under a pressure P, the lower wall 3 of which rests on a rigid support surface 13.
  • f is the relation existing between the length of the elastic threads 7 and their tension.
  • the variation of the tension of an elastic thread 7 can be proportional to its elongation, in the manner of a spring.
  • the elastic threads 7 will therefore exert a retaining force on the wall 2 all the more reduced as they shorten under the effect of the displacement of the wall.
  • the force C necessary to move the wall 2 is therefore progressively increasing as the thickness of the mattress decreases, that is to say the length 1 - ⁇ 1 of the wires 7.
  • elastic reaction of the system similar to that obtained with a spring mattress, when it is subjected to an external compression force, due for example to a localized load. This elastic reaction results from the combined effect of the tensile elasticity of the elastic connecting wires 7 and the inflation pressure which puts these connecting wires in a prestressed state.
  • the air mattress 1 of the invention has an elastic behavior similar to that of a spring mattress, and therefore fundamentally different from that of a conventional air mattress which is not capable of opposing an increasing reaction as a function of the deformation .
  • the membrane effect described for the conventional air mattress in the event of localized action also exists for the mattress according to the invention.
  • the calculation shows that it can represent a significant part of the load, for example 10 to 40%, in the hypothesis of a seated person.
  • the distribution of the forces exerted on the wall by the connecting wires is of very great continuity owing to the very high density of the connecting wires.
  • a number of connecting wires is used from 1 to 20 per square centimeter; for a value of four connecting wires per cm2 (for example), the average distance of the connecting wires is 5 mm.
  • the mattress thus formed is therefore equivalent to a mattress with elastic springs which would have a spring every 5 mm in both directions, ie four springs per square centimeter.
  • Such a mattress allows exceptional quality in the continuity of the distribution of contact stresses, far superior to most of the solutions currently known.
  • the invention finally has another advantage, which is to be able to vary the behavior characteristics of the mattress by varying the inflation pressure.
  • a change in pressure has several effects.
  • the membrane effect is greater when the pressure is higher, the tension of the walls being proportional to the pressure and to the height of the mattress, itself a function of the pressure.
  • Another possibility is to use connecting wires of different lengths, which makes it possible to obtain a decreasing modulus as a function of the deformation.

Landscapes

  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
EP95400101A 1994-03-01 1995-01-19 Luftmatratze Expired - Lifetime EP0678263B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9402318 1994-03-01
FR9402318A FR2716788B1 (fr) 1994-03-01 1994-03-01 Matelas pneumatique.

Publications (2)

Publication Number Publication Date
EP0678263A1 true EP0678263A1 (de) 1995-10-25
EP0678263B1 EP0678263B1 (de) 1998-04-22

Family

ID=9460532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95400101A Expired - Lifetime EP0678263B1 (de) 1994-03-01 1995-01-19 Luftmatratze

Country Status (6)

Country Link
EP (1) EP0678263B1 (de)
JP (1) JPH07255570A (de)
AT (1) ATE165222T1 (de)
DE (1) DE69502128T2 (de)
ES (1) ES2117361T3 (de)
FR (1) FR2716788B1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328865A (en) * 1997-08-27 1999-03-10 Abf Ltd Mattress
FR2778451A1 (fr) * 1998-05-11 1999-11-12 Claude Roy Dispositif pour replier automatiquement une enveloppe gonflee par un fluide au cours de son vidage par depression
EP1752070A1 (de) * 2005-07-04 2007-02-14 CHIEH SHANG Co.,LTD. Aublasbares Luftkissen
US7209708B2 (en) 2001-08-06 2007-04-24 Kabushiki Kaisha Toshiba Image information input/output device and control system for the same using mobile device
GB2523889A (en) * 2013-02-14 2015-09-09 Lunar Caravans Ltd Vehicles
US9156203B2 (en) 2012-03-02 2015-10-13 Intex Recreation Corp. Method for producing an air mattress
US9254240B2 (en) 2013-07-18 2016-02-09 Intex Recreation Corp. Inflatable spa
US10076874B2 (en) 2013-11-25 2018-09-18 Intex Marketing Ltd. Welding process and product for inflatable product
CN109173107A (zh) * 2018-11-16 2019-01-11 铜仁学院 一种免电气垫及组合式气垫
FR3114228A1 (fr) 2020-09-24 2022-03-25 Airmaan Elément de mobilier gonflable en une seule pièce de structure à point lancé

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000059492A (ko) * 1999-03-04 2000-10-05 채정수 침구용 매트리스, 그의 제조방법 및 제조장치
WO2006006216A1 (ja) * 2004-07-09 2006-01-19 Ngc Corporation 体操用緩衝マット
KR100825479B1 (ko) * 2007-03-08 2008-04-28 목문수 에어 매트, 에어 매트의 내부 구조물 및 그 내부 구조물의제조방법
JP4967168B2 (ja) * 2008-06-17 2012-07-04 ブルボン電子株式会社 介護補助具
DE102025111472A1 (de) * 2025-03-25 2026-02-19 Siemens Healthineers Ag Patientenauflage, Anordnung und Verfahren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB598960A (en) * 1945-02-28 1948-03-02 Stirrat Andrew William Johnson Improvements in or relating to pneumatic cushions, mattresses and other slab-like pneumatic structures
US2753573A (en) * 1951-11-08 1956-07-10 Edward D Barker Inflatable mattress
US2872690A (en) * 1955-08-15 1959-02-10 Neisler Brothers Inc Inflatable device of predetermined surface contour and method of making same
US3008213A (en) * 1957-01-22 1961-11-14 Us Rubber Co Method of making an inflatable fabric
JPH04153313A (ja) * 1990-10-15 1992-05-26 Asahi Chem Ind Co Ltd 極細ポリウレタン弾性糸

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB598960A (en) * 1945-02-28 1948-03-02 Stirrat Andrew William Johnson Improvements in or relating to pneumatic cushions, mattresses and other slab-like pneumatic structures
US2753573A (en) * 1951-11-08 1956-07-10 Edward D Barker Inflatable mattress
US2872690A (en) * 1955-08-15 1959-02-10 Neisler Brothers Inc Inflatable device of predetermined surface contour and method of making same
US3008213A (en) * 1957-01-22 1961-11-14 Us Rubber Co Method of making an inflatable fabric
JPH04153313A (ja) * 1990-10-15 1992-05-26 Asahi Chem Ind Co Ltd 極細ポリウレタン弾性糸

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 437 (C - 0984) 11 September 1992 (1992-09-11) *

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328865B (en) * 1997-08-27 2001-03-28 Abf Ltd A mattress
GB2328865A (en) * 1997-08-27 1999-03-10 Abf Ltd Mattress
FR2778451A1 (fr) * 1998-05-11 1999-11-12 Claude Roy Dispositif pour replier automatiquement une enveloppe gonflee par un fluide au cours de son vidage par depression
WO1999058792A1 (fr) * 1998-05-11 1999-11-18 Claude Roy Dispositif pour replier automatiquement une enveloppe gonflee par un fluide au cours de son vidage par depression
US7209708B2 (en) 2001-08-06 2007-04-24 Kabushiki Kaisha Toshiba Image information input/output device and control system for the same using mobile device
EP1752070A1 (de) * 2005-07-04 2007-02-14 CHIEH SHANG Co.,LTD. Aublasbares Luftkissen
US9802359B2 (en) 2012-03-02 2017-10-31 Intex Marketing Ltd. Method for producing an inflatable product
US9156203B2 (en) 2012-03-02 2015-10-13 Intex Recreation Corp. Method for producing an air mattress
US10165869B2 (en) 2012-03-02 2019-01-01 Intex Marketing Ltd. Internal tensioning structure useable with inflatable devices
US10165868B2 (en) 2012-03-02 2019-01-01 Intex Marketing Ltd. Internal tensioning structure useable with inflatable devices
US9901186B2 (en) 2012-03-02 2018-02-27 Intex Marketing Ltd. Internal tensioning structure useable with inflatable devices
GB2523889A (en) * 2013-02-14 2015-09-09 Lunar Caravans Ltd Vehicles
GB2523889B (en) * 2013-02-14 2017-07-12 Lunar Caravans Ltd Self-supporting inflatable mattress suitable for use as a bed in a vehicle
US10815686B2 (en) 2013-07-18 2020-10-27 Intex Marketing Ltd. Inflatable spa
US10161148B2 (en) 2013-07-18 2018-12-25 Intex Marketing Ltd. Inflatable spa
US9642771B2 (en) 2013-07-18 2017-05-09 Intex Marketing Ltd. Inflatable spa
US9254240B2 (en) 2013-07-18 2016-02-09 Intex Recreation Corp. Inflatable spa
US11421434B2 (en) 2013-07-18 2022-08-23 Intex Marketing Ltd. Inflatable spa
US10076874B2 (en) 2013-11-25 2018-09-18 Intex Marketing Ltd. Welding process and product for inflatable product
US11065823B2 (en) 2013-11-25 2021-07-20 Intex Marketing Ltd. Welding process and product for inflatable product
US11654638B2 (en) 2013-11-25 2023-05-23 Intex Marketing Ltd. Welding process and product for inflatable product
CN109173107A (zh) * 2018-11-16 2019-01-11 铜仁学院 一种免电气垫及组合式气垫
CN109173107B (zh) * 2018-11-16 2023-12-05 铜仁学院 一种免电气垫及组合式气垫
FR3114228A1 (fr) 2020-09-24 2022-03-25 Airmaan Elément de mobilier gonflable en une seule pièce de structure à point lancé
WO2022064135A1 (fr) 2020-09-24 2022-03-31 Airmaan Elément de mobilier gonflable en une seule pièce de structure à point lancé

Also Published As

Publication number Publication date
JPH07255570A (ja) 1995-10-09
FR2716788A1 (fr) 1995-09-08
DE69502128D1 (de) 1998-05-28
ES2117361T3 (es) 1998-08-01
EP0678263B1 (de) 1998-04-22
DE69502128T2 (de) 1999-01-07
FR2716788B1 (fr) 1996-04-26
ATE165222T1 (de) 1998-05-15

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