WO2003018925A1 - Sound insulation panel - Google Patents

Sound insulation panel Download PDF

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Publication number
WO2003018925A1
WO2003018925A1 PCT/AU2002/001135 AU0201135W WO03018925A1 WO 2003018925 A1 WO2003018925 A1 WO 2003018925A1 AU 0201135 W AU0201135 W AU 0201135W WO 03018925 A1 WO03018925 A1 WO 03018925A1
Authority
WO
WIPO (PCT)
Prior art keywords
sound insulation
insulation product
sound
pockets
sheet
Prior art date
Application number
PCT/AU2002/001135
Other languages
French (fr)
Inventor
Robert George Embelton
Original Assignee
G. P. Embelton & Co. Pty. 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 G. P. Embelton & Co. Pty. Ltd. filed Critical G. P. Embelton & Co. Pty. Ltd.
Priority to AU2002328657A priority Critical patent/AU2002328657C1/en
Publication of WO2003018925A1 publication Critical patent/WO2003018925A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • E04F15/20—Separately-laid insulating layers; Other additional insulating measures; Floating floors for sound insulation
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B1/86—Sound-absorbing elements slab-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8461—Solid slabs or blocks layered
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/849—Groove or slot type openings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/8495—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the openings going through from one face to the other face of the element

Definitions

  • This invention relates to a sound insulation product
  • barrier materials which provide effective acoustic insulation often have poor structural strength, rendering them unsuitable in applications such as underlay for hard flooring or as load bearing interleaving layers between structural building elements. These materials can quickly crush or otherwise break down when subjected to mechanical forces such as, for example, those due to heavy live or dead loads being positioned on a floor or other building component supported by the barrier material, thereby losing or lessening their acoustical properties.
  • Neither of the above classes of material is generally effective as a barrier to the transmission of noise, which is more readily achieved through the mass attenuation of sound by the use of high density materials to resist penetration of acoustical energy, as distinct from absorbing it. Such materials may also serve to reflect noise.
  • the invention provides a sound insulation product in which low strength sound absorbent material is provided in pockets formed in a resilient load-bearing base.
  • the base may be in the form of a sheet, with the pockets being formed as ones of an array of apertures in the sheet.
  • the pockets may be formed to the full depth of the sheet or to partial depth.
  • the pockets may be elongate so that the load bearing resultant material and the sound absorbing materials are arranged in alternating side-by-side strips, for example, parallel strips.
  • the pockets may be open to one or both of two opposed faces of the product, or may be substantially closed.
  • the pockets may be of any convenient form, such as circular or the strip-like form above described.
  • the pockets may be substantially or wholly unconnected with each other.
  • the configuration may be selected to provide a balance between the load bearing resilient base material and the low strength acoustical absorption materials. Accordingly, other configurations can be arranged according to the physical and acoustical properties required in different situations.
  • the sheet may be formed from load-bearing flexible material such as rubber, and the sound absorbent material as foam, rockwool or other low strength sound absorbing materials.
  • a layer of high-density material to resist transmission of sound and/or reflect sound may be provided at one or both sides of the sheet. This layer may be formed, for example, of a vinyl sheet which is blended with heavy density compounds such as barium to achieve the resistance to sound transmission.
  • the invention also provides a sound insulation product having sound absorbent material reinforced with regions of load bearing material.
  • the product may be of generally laminar form, the sound absorbent material and load bearing material being arranged in alternating strips.
  • Figure 1 is a diagrammatic plan view of a sheet of a sound insulation product formed in accordance with the invention
  • Figure 2 is a cross section of the sound insulation product of Figure 1;
  • Figure 3 is a cross section of a modified sheet of sound insulation product formed in accordance with the invention:
  • Figure 4 is a cross-section of another modified sheet of sound insulation product formed in accordance with the invention:
  • Figure 5 is a perspective view of a sheet material useful in the product of Figure 4;
  • Figure 6 is a perspective view of a further product formed in accordance with the invention.
  • the sound insulation product 10 of Figure 1 is formed from a sheet 12 of material, for example formed from reconstituted tyres.
  • this sheet should be somewhat flexible and/or resilient, but with sufficient capacity to support the dead and live loadings and with good resistance to breakdown under repeatedly applied localized forces as occur when a floor is walked on.
  • the thickness may be selected in accordance with requirements. For example, the thickness may be in the range of a few millimeters (eg 5 mm) to 30 mm or 40 mm, such as of the order of one or two centimetres.
  • the material may, generally, be selected from elastomeric materials possessing good shock and impact isolation properties.
  • the sheet 12 has formed in it an array of apertures 14.
  • these apertures are circular, and arranged in a regular array, although neither the shape nor the form of the array is critical. Neither do they need to all be the same size.
  • the apertures may, for example, be of the order of 1 to 5 centimetres in size, with the centres in a rectangular array with spacing in both directions of extent of the array equal to the diameter of the apertures plus 1-5 centimetres.
  • the apertures 14 are filled with sound absorbent material 16, such as foam material, rockwool or the like.
  • the products 10 may be formed by forming the sheet 12, punching or cutting the apertures 14, or forming the sheet with apertures included, and then applying the sound absorbent material 16 to the apertures.
  • the product 10 may be laid over a formed floor, if necessary being bonded to the floor. It may likewise be applied underfloor, or generally anywhere where sound insulation is required, such as on or in walls, or in a roof. Where it is on an existing floor, it may be covered with any desired floor covering, such as tiles.
  • the product 30 shown in Figure 3 is generally similar to the product 10. It has a sheet 12, with apertures 14 filled with sound absorbent material 16, as in the product 10. However, at one face of sheet 12 there is provided a sheet 18 of sound reflective material. This may be formed, for example of vinyl material, loaded with a suitable filler which provides mass attenuation of sound.
  • the sound absorbent material 16 is applied in strip-like pockets 36 formed in a sheet 38 ( Figure 5) formed of load bearing material.
  • the cross-section of sheet 38 exhibits parallel alternating lands 42, 44 adjacent lands 42, 44 being of different heights.
  • pockets which receive the sound insulation material may be arranged in a two- dimensional array as, for example, in Figures 1 to 3 or, for example, may be strip-like as shown in Figures 4 and 5.
  • the pockets may be unconnected, or interconnected.
  • resilient loadbearing lands 42,44 alternate with the acoustically absorbent material 16 such that a high proportion of the area is comprised of the latter, the size of the stronger resilient material being determined by the loadings which need to be sustained. For example, a ratio of 80%/20% foam to resilient load bearing rubber has been found to be effective.
  • Figure 6 shows a still further embodiment.
  • the product 50 so illustrated has alternating side-by-side strips 52, 54.
  • Strips 52 are formed of sound insulation material such as acoustic foam.
  • Strips 54 are formed from resilient load bearing material.
  • Materials useful in forming load bearing components of products in accordance with the invention include material such as reconstituted rubber products marketed by G. P. Embelton and Co. Pty. Ltd., Coburg, 3058, Australia under the trademark "IMPACTAMAT". This material is formed from recycled rubber bound with a flexible binder. This material is available in densities in the range 600-900 K/cubic metre. Other rubber compounds or materials may be suitable. Also material made by the mentioned company and sold under the trademarks "SHEARFLEX” and "SUPERSHEARFLEX” may be utilised. Variants of the latter material are suitable for loads in the range 70 to 1200 KPA. Generally, the materials most useful have some resilience and capacity to recover original shape after repeated deformations.
  • the sound absorbent material will have low strength, such as having a load bearing capacity which is a fraction such as 2 to 10% of that of the selected load bearing material. Principally, this material can be selected only on the basis of sound absorbent characteristics, and ease of use in manufacture of the products in accordance with the invention. Materials that are crushable under even moderate loads may be employed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Electromagnetism (AREA)
  • Floor Finish (AREA)

Abstract

Sound insulation product (10) formed of a resilient sheet (12) having pockets (14) with sound absorbent material (16) therewithin.

Description

SOUND INSULATION PANEL
This invention relates to a sound insulation product
A difficulty in the provision of building systems having good sound and vibration insulation properties is that barrier materials which provide effective acoustic insulation often have poor structural strength, rendering them unsuitable in applications such as underlay for hard flooring or as load bearing interleaving layers between structural building elements. These materials can quickly crush or otherwise break down when subjected to mechanical forces such as, for example, those due to heavy live or dead loads being positioned on a floor or other building component supported by the barrier material, thereby losing or lessening their acoustical properties.
Another difficulty arises because resilient materials such as rubber or other elastomers which may be suitable for absorption and isolation of low frequency noise, vibration or shock, and which possess load-bearing capacity, are often ineffective as absorbers of higher frequency airborne noise.
Neither of the above classes of material is generally effective as a barrier to the transmission of noise, which is more readily achieved through the mass attenuation of sound by the use of high density materials to resist penetration of acoustical energy, as distinct from absorbing it. Such materials may also serve to reflect noise.
In one aspect, the invention provides a sound insulation product in which low strength sound absorbent material is provided in pockets formed in a resilient load-bearing base. The base may be in the form of a sheet, with the pockets being formed as ones of an array of apertures in the sheet. The pockets may be formed to the full depth of the sheet or to partial depth.
The pockets may be elongate so that the load bearing resultant material and the sound absorbing materials are arranged in alternating side-by-side strips, for example, parallel strips. The pockets may be open to one or both of two opposed faces of the product, or may be substantially closed. The pockets may be of any convenient form, such as circular or the strip-like form above described. The pockets may be substantially or wholly unconnected with each other. Generally, the configuration may be selected to provide a balance between the load bearing resilient base material and the low strength acoustical absorption materials. Accordingly, other configurations can be arranged according to the physical and acoustical properties required in different situations.
The sheet may be formed from load-bearing flexible material such as rubber, and the sound absorbent material as foam, rockwool or other low strength sound absorbing materials. A layer of high-density material to resist transmission of sound and/or reflect sound may be provided at one or both sides of the sheet. This layer may be formed, for example, of a vinyl sheet which is blended with heavy density compounds such as barium to achieve the resistance to sound transmission.
The invention also provides a sound insulation product having sound absorbent material reinforced with regions of load bearing material. The product may be of generally laminar form, the sound absorbent material and load bearing material being arranged in alternating strips.
Figure 1 is a diagrammatic plan view of a sheet of a sound insulation product formed in accordance with the invention;
Figure 2 is a cross section of the sound insulation product of Figure 1;
Figure 3 is a cross section of a modified sheet of sound insulation product formed in accordance with the invention:
Figure 4 is a cross-section of another modified sheet of sound insulation product formed in accordance with the invention: Figure 5 is a perspective view of a sheet material useful in the product of Figure 4; and
Figure 6 is a perspective view of a further product formed in accordance with the invention.
The sound insulation product 10 of Figure 1 is formed from a sheet 12 of material, for example formed from reconstituted tyres. Usually, this sheet should be somewhat flexible and/or resilient, but with sufficient capacity to support the dead and live loadings and with good resistance to breakdown under repeatedly applied localized forces as occur when a floor is walked on. The thickness may be selected in accordance with requirements. For example, the thickness may be in the range of a few millimeters (eg 5 mm) to 30 mm or 40 mm, such as of the order of one or two centimetres. The material may, generally, be selected from elastomeric materials possessing good shock and impact isolation properties.
The sheet 12 has formed in it an array of apertures 14. In the illustrated product 10, these apertures are circular, and arranged in a regular array, although neither the shape nor the form of the array is critical. Neither do they need to all be the same size. In the illustrated embodiment, the apertures may, for example, be of the order of 1 to 5 centimetres in size, with the centres in a rectangular array with spacing in both directions of extent of the array equal to the diameter of the apertures plus 1-5 centimetres.
The apertures 14 are filled with sound absorbent material 16, such as foam material, rockwool or the like.
The products 10 may be formed by forming the sheet 12, punching or cutting the apertures 14, or forming the sheet with apertures included, and then applying the sound absorbent material 16 to the apertures.
In use the product 10 may be laid over a formed floor, if necessary being bonded to the floor. It may likewise be applied underfloor, or generally anywhere where sound insulation is required, such as on or in walls, or in a roof. Where it is on an existing floor, it may be covered with any desired floor covering, such as tiles.
The product 30 shown in Figure 3 is generally similar to the product 10. It has a sheet 12, with apertures 14 filled with sound absorbent material 16, as in the product 10. However, at one face of sheet 12 there is provided a sheet 18 of sound reflective material. This may be formed, for example of vinyl material, loaded with a suitable filler which provides mass attenuation of sound.
In the product 40 of Figure 4, the sound absorbent material 16 is applied in strip-like pockets 36 formed in a sheet 38 (Figure 5) formed of load bearing material.
The cross-section of sheet 38 exhibits parallel alternating lands 42, 44 adjacent lands 42, 44 being of different heights.
Generally, pockets which receive the sound insulation material may be arranged in a two- dimensional array as, for example, in Figures 1 to 3 or, for example, may be strip-like as shown in Figures 4 and 5. The pockets may be unconnected, or interconnected.
In a specific form, resilient loadbearing lands 42,44 alternate with the acoustically absorbent material 16 such that a high proportion of the area is comprised of the latter, the size of the stronger resilient material being determined by the loadings which need to be sustained. For example, a ratio of 80%/20% foam to resilient load bearing rubber has been found to be effective.
Figure 6 shows a still further embodiment. The product 50 so illustrated has alternating side-by-side strips 52, 54. Strips 52 are formed of sound insulation material such as acoustic foam. Strips 54 are formed from resilient load bearing material.
Materials useful in forming load bearing components of products in accordance with the invention include material such as reconstituted rubber products marketed by G. P. Embelton and Co. Pty. Ltd., Coburg, 3058, Australia under the trademark "IMPACTAMAT". This material is formed from recycled rubber bound with a flexible binder. This material is available in densities in the range 600-900 K/cubic metre. Other rubber compounds or materials may be suitable. Also material made by the mentioned company and sold under the trademarks "SHEARFLEX" and "SUPERSHEARFLEX" may be utilised. Variants of the latter material are suitable for loads in the range 70 to 1200 KPA. Generally, the materials most useful have some resilience and capacity to recover original shape after repeated deformations.
Usually, the sound absorbent material will have low strength, such as having a load bearing capacity which is a fraction such as 2 to 10% of that of the selected load bearing material. Principally, this material can be selected only on the basis of sound absorbent characteristics, and ease of use in manufacture of the products in accordance with the invention. Materials that are crushable under even moderate loads may be employed.
The described embodiments of the invention have been advanced merely by way of explanation and many modifications and variations may be made without departing from the spirit and scope of the invention which includes every novel feature and combination of novel features herein described.
Throughout this specification, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
The reference to any prior art in this specification is not, and should not be taken as, an acknowledgment or any form of suggestion that that prior art forms part of the common general knowledge.

Claims

CLAIMS:-
1. A sound insulation product in which low strength sound absorbent material is provided in pockets formed in a resilient load-bearing base.
2. A sound insulation product as claimed in claim 1 , wherein the base is in the form of a sheet, with the pockets being formed as ones of an array of apertures in the sheet.
3. A sound insulation product as claimed in claim 2, wherein the pockets are formed to the full depth of the sheet.
4. A sound insulation product as claimed in claim 2, wherein the pockets are formed to a partial depth of the sheet.
5. A sound insulation product as claimed in any preceding claim, wherein the pockets are elongate so that the load bearing material and the sound absorbing material are arranged in alternating side-by-side strips.
6. A sound insulation product as claimed in claim 5, wherein said strips are parallel.
7. A sound insulation product as claimed in any preceding claim, wherein said pockets are open to one only of two opposed faces of the product.
8. A sound insulation product according to any one of claims 1 to 6, wherein said pockets are open to both of two opposed faces of the product.
9. A sound insulation product according to any one of claims 1 to 6, wherein the pockets are substantially closed.
10. A sound insulation product according to any preceding claim, wherein the pockets are substantially unconnected.
11. A sound insulation product according to any preceding claim, wherein the pockets are interconnected.
12. A sound insulation product according to any preceding claim, wherein the base is formed from load-bearing flexible material.
13. A sound insulation product according to claim 12, wherein the load-bearing flexible material is rubber.
14. A sound insulation product according to any preceding claim, wherein the sound absorbent material is foam or rockwool.
15. A sound insulation product as claimed in any preceding claim, wherein a layer of high-density material to resist transmission of sound is provided at least at one side of the product.
16. A sound insulation product as claimed in claim 15, wherein said layer is formed from a vinyl sheet which is blended with heavy density compounds to achieve the resistance to sound transmission.
17. A sound insulation product having sound absorbent material reinforced with regions of load bearing material.
18. A sound insulation product according to claim 17 of generally laminar form, the sound absorbent material and load bearing material being arranged in alternating strips.
PCT/AU2002/001135 2001-08-23 2002-08-23 Sound insulation panel WO2003018925A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002328657A AU2002328657C1 (en) 2001-08-23 2002-08-23 Sound insulation panel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPR7235A AUPR723501A0 (en) 2001-08-23 2001-08-23 Sound insulation product
AUPR7235 2001-08-23

Publications (1)

Publication Number Publication Date
WO2003018925A1 true WO2003018925A1 (en) 2003-03-06

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ID=3831188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2002/001135 WO2003018925A1 (en) 2001-08-23 2002-08-23 Sound insulation panel

Country Status (2)

Country Link
AU (1) AUPR723501A0 (en)
WO (1) WO2003018925A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012084068A3 (en) * 2010-12-21 2012-12-06 Gib Gesellschaft Für Innovative Bautechnologie Mbh Heat-conducting panel
EP3416161A1 (en) * 2017-06-13 2018-12-19 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. Sound-absorbing partition curtain
CN114718887A (en) * 2022-04-20 2022-07-08 刘西保 Noise reduction air duct of axial flow fan

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2663682A1 (en) * 1990-06-21 1991-12-27 Peugeot DEVICE WITH VARIABLE AMPLITUDE FOR THE RISE OF AT LEAST ONE VALVE OF INTERNAL COMBUSTION ENGINE.
JPH1030287A (en) * 1996-07-17 1998-02-03 Kasahara Kogyo Kk Floor material for sound insulation
JPH11200608A (en) * 1998-01-19 1999-07-27 Agency Of Ind Science & Technol Floor structural material
DE29915124U1 (en) * 1999-08-28 1999-12-09 Kakuk, Stefan, 68794 Oberhausen-Rheinhausen Screed panels
JP2001040861A (en) * 1999-07-30 2001-02-13 Kokuyo Co Ltd Filler containing oa floor panel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2663682A1 (en) * 1990-06-21 1991-12-27 Peugeot DEVICE WITH VARIABLE AMPLITUDE FOR THE RISE OF AT LEAST ONE VALVE OF INTERNAL COMBUSTION ENGINE.
JPH1030287A (en) * 1996-07-17 1998-02-03 Kasahara Kogyo Kk Floor material for sound insulation
JPH11200608A (en) * 1998-01-19 1999-07-27 Agency Of Ind Science & Technol Floor structural material
JP2001040861A (en) * 1999-07-30 2001-02-13 Kokuyo Co Ltd Filler containing oa floor panel
DE29915124U1 (en) * 1999-08-28 1999-12-09 Kakuk, Stefan, 68794 Oberhausen-Rheinhausen Screed panels

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; Class L02, AN 2001-232443/24 *
DATABASE WPI Derwent World Patents Index; Class Q43, AN 1998-163938/15 *
DATABASE WPI Derwent World Patents Index; Class Q45, AN 1999-474901/40 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012084068A3 (en) * 2010-12-21 2012-12-06 Gib Gesellschaft Für Innovative Bautechnologie Mbh Heat-conducting panel
EP3416161A1 (en) * 2017-06-13 2018-12-19 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. Sound-absorbing partition curtain
CN114718887A (en) * 2022-04-20 2022-07-08 刘西保 Noise reduction air duct of axial flow fan

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