EP0788752B1 - Matratze - Google Patents

Matratze Download PDF

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Publication number
EP0788752B1
EP0788752B1 EP97300343A EP97300343A EP0788752B1 EP 0788752 B1 EP0788752 B1 EP 0788752B1 EP 97300343 A EP97300343 A EP 97300343A EP 97300343 A EP97300343 A EP 97300343A EP 0788752 B1 EP0788752 B1 EP 0788752B1
Authority
EP
European Patent Office
Prior art keywords
mattress
projections
patient
supporting surface
support
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.)
Expired - Lifetime
Application number
EP97300343A
Other languages
English (en)
French (fr)
Other versions
EP0788752A1 (de
Inventor
Michael John Clancy
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.)
Hill Rom UK Ltd
Original Assignee
Hill Rom UK 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 Hill Rom UK Ltd filed Critical Hill Rom UK Ltd
Publication of EP0788752A1 publication Critical patent/EP0788752A1/de
Application granted granted Critical
Publication of EP0788752B1 publication Critical patent/EP0788752B1/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
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/12—Means, e.g. measuring means, for adapting chairs, beds or mattresses to the shape or weight of persons
    • A47C31/123—Means, e.g. measuring means, for adapting chairs, beds or mattresses to the shape or weight of persons for beds or mattresses
    • 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
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/142—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays with projections, depressions or cavities
    • A47C27/146—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays with projections, depressions or cavities on the outside surface of the mattress or cushion
    • 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
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/148—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays of different resilience
    • 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
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/15—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays consisting of two or more layers

Definitions

  • the present invention relates to mattresses, especially mattresses for relieving or reducing pressure exerted by the body of a patient lying thereon.
  • DE - A 3143883 discloses mattresses specifically for children's beds comprising a resilient core, the upper and lower sides of the mattress having plates of different thickness and/or material consistency, one plate being soft and the other plate being hard.
  • US - 5160785 discloses a resilient padding body comprising an intermediate base layer and upper protuberances extending upwardly off the surface of the base layer and bottom protuberances extending downwardly off a lower surface of the base layer.
  • US- 4999868 discloses a mattress formed with an upper variable firmness section covering a lower section of generally uniform firmness.
  • the upper section is divided along its length into four transversely extending regions, namely, a head, an upper torso and a leg support region.
  • FR - A - 2324260 discloses a mattress having the features as set forth in the preamble of claim 1 an insert with a number of protuberances therein.
  • a mattress having a first supporting surface which is of a different degree of hardness or firmness to an opposite second supporting surface, wherein each of the first and second supporting surfaces are formed by a plurality of projections and wherein the second supporting surface has a greater number of projections than the first supporting surface.
  • the mattress may thus be turned to the appropriate side for the person in question.
  • the mattress is made wholly or partly from foamed plastics material, e.g. a foamed polyurethane material, and is preferably at least flame retardant.
  • foamed plastics material e.g. a foamed polyurethane material
  • At least one of the two supporting surfaces (and preferably both patient supporting surfaces) is formed by a plurality of projections each preferably designed to flex independently of one another.
  • the projections are preferably, though not necessarily, in the form of truncated pyramids, preferably defined by two series of grooves at right angles to each other, with the grooves being wider at the patient supporting surface than at the bottom.
  • a mattress each patient. supporting surface of which is formed with a plurality of projections (e.g. truncated pyramids), one of said surfaces having a greater number of projections than the other so as to provide support for a lighter patient than the other of said surfaces.
  • projections e.g. truncated pyramids
  • the degree of support provided by the patient support surfaces can be varied.
  • either or both patient supporting surfaces may have areas which provide different amounts of support at different points. This is of advantage because different parts of the body apply different degrees of pressure to the mattress and therefore require different degrees of pressure relief.
  • each projection on the surface for supporting heavy patients preferably has a support surface having an area which is from 58.05cm 2 to 161.25cm 2 (9 to 25 square inches). If the support surface of each of the projections is square it would therefore preferably be from 7.62 x 7.62cm (3" x 3") and 12.7 x 12.7cm (5" x 5"). More preferably the support surface of each projection on the surface for heavier patients is from 77.4 to 129cm 2 (12 to 20 square inches), ideally about 93.53cm 2 (14.5 square inches). In one embodiment the area is 94.62cm 2 (14.67 square inches).
  • projections e.g. 10.16 x 10.16cm (4" x 4") in a mattress of a size approximately 190.5 x 88.9cm (75" x 35").
  • the mattress size can vary and clearly the larger the mattress the more projections.
  • the number of projections would be increased or decreased pro rata in relation to the size of mattress.
  • each projection On the surface to support a lighter patient the projections each preferably have a patient supporting surface which is from 12.9 to 102.4cm 2 (2 to 16 square inches) in area.
  • the patient support surface of each projection may be any shape but is preferably oblong or square.
  • the surface of the mattress for lighter patients preferably has from 250 to 350 more preferably 280 to 320, still more preferably 306 projections in a mattress of size about 190.5 x 88.9cm (75" x 35") with more or less projections on a pro rata basis for larger or smaller mattresses.
  • the surface of the mattress for lighter patients has three separate zones, (which are preferably all part of one member), one for the head of the patient, one for the trunk of the patient and one for the lower legs and feet.
  • the zone for the trunk is preferably more dense than the areas for the head and feet.
  • the patient support surface comprises projections each projection will be of larger patient support area in the trunk support zone than in the head and/or feet support zone.
  • each projection in the head and foot support area is oblong and has an area from 11.61cm 2 (1.8 square inches) to 18.06cm 2 (2.8 square inches), more preferably 12.9 to 16.77cm 2 (2.0 to 2.6 square inches) (in one embodiment the area is about 15.3cm 2 (2.37 square inches).
  • trunk support zone Preferably there are from 70 to 110, more preferably 80 to 100, ideally 90 projections in the trunk support zone
  • each projection is oblong and has a patient support area of 25.8 to 103.2cm 2 (4 to 16 square inches ) preferably 38.7 to 51.6cm 2 (6 to 8 square inches). In one embodiment the area is about 45.92cm 2 (7.12 square inches).
  • each of the head and feet support areas will have approximately 88 to 128 projections arranged e.g. in a 9 x 12 layout and the trunk support area will have approximately 70 to 168, more preferably 70 to 110, projections e.g. in a 9 x 10 layout.
  • the original material i.e. before forming the projections when present
  • the original material preferably has a density of from 35 to 55 kg/m 3 .
  • the projections may then be formed e.g. by cutting grooves in the material.
  • the density of the final material will then depend e.g. upon the original density, and the size, shape and number of projections, which will in turn depend upon the number and extent of the grooves.
  • the mattress may be placed with one patient support surface uppermost for light patients and with the other patient support surface uppermost for heavier patients.
  • the arrangement is that one surface is used for patients above 70kg in weight and the other support surface is used for patients below 70kg in weight.
  • the support surface for the lighter patients provides a softer surface and the patient support surface for the heavier patients provides a harder or firmer surface. There is thus a better chance that the mattress surface will conform to the body shape of the patient when in use. In the event that decubitus ulcers are not a problem, the patient may choose which surface he/she prefers.
  • the whole of the mattress may be encased in a cover which is preferably vapour permeable and fluid proof.
  • one of the support surfaces (preferably the surface for lighter patients) is provided by an insert located in a cavity formed in the main body of the mattress.
  • the advantage of one of the support surfaces being in the form of a separate insert is that the separate support surface may be changed without changing the whole mattress and also a series of such separate inserts may be provided of different firmness or hardness to use as desired.
  • the insert may be a foamed plastics material, e.g. having projections preferably in the form of truncated pyramids as described above to form the patient support surface.
  • the insert may be formed by other suitable material e.g. a 'gel'.
  • the cavity may thus for example be filled with a suitable gel. It may be necessary or desirable to encase the insert in a loose fitting cover especially when it is in the form of a gel which can offer additional fire retardant protection (if suitable material is used) and perhaps more importantly provide a low friction interface with the external cover (when used) surrounding the mattress. This would provide the additional benefit of lower shear force than would ordinarily be expected of a foam or gel mattress.
  • the matress is of any convenient size but is usually a single mattress and is preferably about 190.5cm (75") long and 88.9cm (35") wide and of a thickness between 12.7cm (5") and 16.51cm (6.5") e.g. 13.97cm (5.5"). Any other size is acceptable however e.g. 15.24 x 7.62cm (6'0 x 3'0).
  • the mattress 10 comprises a polyurethane foam base member 12 of length 1932.5 mm, width 875mm and thickness 153mm.
  • One surface of this base member 12 is formed with a series of 136 truncated pyramids 14 by means of two series of grooves 16, 18 formed at right angles and having a depth of 45mm.
  • the patient supporting surfaces of these truncated pyramids 14 are 98.6mm in length and 96mm wide.
  • the width of the grooves 16, 18 is greater at the surface than at the bottom of the grooves.
  • the support surface formed by the truncated pyramids 14 is for heavier patients e.g. those above 70kg.
  • the foam base prior to forming the grooves and truncated pyramids has the following properties Density (kg/m 3 ) 48 - 52 Hardness (N) 190 - 230 Tensile Strength (KPa) 70 min Elongation at break (%) 90 min Dry Compression Set (%) 8 max Fatigue class V
  • the other surface of the base member 12 is formed with a cavity 20 into which is placed a polyurethane foam insert 22 which is 1783mm long, 725mm wide and 55mm deep.
  • a polyurethane foam insert 22 which is 1783mm long, 725mm wide and 55mm deep.
  • One surface of the insert is formed with a series of 306 truncated pyramids 24.
  • the truncated pyramids 24 are defined by grooves of a depth 25mm the width of which are greater at the top than at the bottom.
  • the foam insert 22 is a single piece and is provided with three zones 26, 28, 30 of differing support to make the mattress more comfortable to the different areas of the body and to provide varying pressure relief to different areas of the body.
  • the two ends of the insert are provided with 108 truncated pyramids in a 9 x 12 layout to support the head and the feet and lower legs where a softer or less firm surface is required.
  • Each truncated pyramid in these zones 26 and 30 has a patient support surface which is 66mm wide (i.e. in the direction across the insert) and 23 mm long (i.e. in the direction along the length of the insert).
  • the centre zone 28 comprises 90 larger truncated pyramids in a 9 x 10 layout (10 along the length and 9 across the width) to provide a firmer or harder surface for the trunk section of the body.
  • Each truncated pyramid in this zone 28 has a patient support surface which is 66mm wide and 69.7 mm long.
  • the foam insert prior to forming the grooves and truncated pyramids has the following properties. Density (kg/m 3 ) 35 - 38 Hardness (N) 90 - 110 Tensile strength (kPa) 70 min Elongation at break (%) 120 min Compression set (%) 4 - 6 Humidity Compression Set (%) 4 - 7 Fatigue Class V

Landscapes

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

Claims (8)

  1. Matratze (10) mit einer ersten Stützfläche, die einen anderen Härtegrad oder Festigkeitsgrad aufweist als eine gegenüberliegende zweite Stützfläche, dadurch gekennzeichnet, dass sowohl die erste als auch die zweite Stützfläche durch eine Vielzahl von Erhebungen (14; 24) gebildet ist und dass die zweite Stützfläche eine größere Anzahl von Erhebungen aufweist als die erste Stützfläche.
  2. Matratze (10) nach Anspruch 1, die vollständig oder teilweise aus geschäumtem Kunststoffmaterial hergestellt ist.
  3. Matratze (10) nach Anspruch 1 oder Anspruch 2, bei der die Erhebungen (14; 24) die Form von gestutzten Pyramiden aufweisen.
  4. Matratze (10) nach einem der vorhergehenden Ansprüche, bei der eine oder beide der ersten und zweiten Stützfläche Bereiche (26, 28, 30) aufweisen, die an verschiedenen Stellen eine unterschiedlich große Stützung bieten.
  5. Matratze (10) nach Anspruch 4, bei der die zweite Stützfläche der Matratze eine Kopfzone (26), eine Rumpfzone (28) und eine Zone (30) für die Unterschenkel und Füße aufweist.
  6. Matratze (10) nach Anspruch 5, bei der die Rumpfzone (28) dichter ist als die Kopfzone (26) und die Zone (30) für die Unterschenkel und Füße.
  7. Matratze (10) nach einem der vorhergehenden Ansprüche, bei der die zweite Stützfläche durch einen Einsatz (22) bereitgestellt ist, der sich in einem Hohlraum (20) befindet, der in dem Hauptkörper (12) der Matratze (10) gebildet ist.
  8. Matratze (10) nach Anspruch 7, bei der der Einsatz (22) aus einem geschäumten Kunststoffmaterial besteht oder durch ein Gel gebildet ist.
EP97300343A 1996-02-09 1997-01-20 Matratze Expired - Lifetime EP0788752B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9602624.0A GB9602624D0 (en) 1996-02-09 1996-02-09 Mattress
GB9602624 1996-02-09

Publications (2)

Publication Number Publication Date
EP0788752A1 EP0788752A1 (de) 1997-08-13
EP0788752B1 true EP0788752B1 (de) 2002-10-16

Family

ID=10788393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97300343A Expired - Lifetime EP0788752B1 (de) 1996-02-09 1997-01-20 Matratze

Country Status (4)

Country Link
EP (1) EP0788752B1 (de)
AT (1) ATE226043T1 (de)
DE (1) DE69716317D1 (de)
GB (1) GB9602624D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015116940A1 (de) * 2014-11-11 2016-05-12 Jan Lange Stroh-Schaumstoffmatratze

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0514927D0 (en) * 2005-07-20 2005-08-24 Huntleigh Technology Plc Mattress
US8359689B2 (en) 2009-04-24 2013-01-29 Fxi, Inc. Mattress adapted for supporting heavy weight persons
GB2558746B (en) * 2016-11-14 2021-10-27 Essential Healthcare Solutions Uk Ltd Improvements to bed and mattress therefore
DE102020120186A1 (de) * 2020-07-30 2022-02-03 Emma Sleep Gmbh Schaumstoffkern für eine Matratze sowie Matratze

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2324260A1 (fr) * 1975-09-22 1977-04-15 Hargest Thomas Matelas a garniture inseree a pression variable
GB1559851A (en) * 1976-08-04 1980-01-30 Evans R J P Mattress or pad to support the human body
DE3143883A1 (de) * 1981-11-05 1983-05-11 Alvi Alfred Viehhofer Gmbh & C "matratze"
US4999868A (en) * 1990-05-11 1991-03-19 Eugene Kraft Varying firmness mattress
US5160785A (en) * 1991-06-11 1992-11-03 E. R. Carpenter Company, Inc. Padding body

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015116940A1 (de) * 2014-11-11 2016-05-12 Jan Lange Stroh-Schaumstoffmatratze

Also Published As

Publication number Publication date
GB9602624D0 (en) 1996-04-10
EP0788752A1 (de) 1997-08-13
DE69716317D1 (de) 2002-11-21
ATE226043T1 (de) 2002-11-15

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