DE10134783B4 - A sound proofing - Google Patents
A sound proofing Download PDFInfo
- Publication number
- DE10134783B4 DE10134783B4 DE10134783A DE10134783A DE10134783B4 DE 10134783 B4 DE10134783 B4 DE 10134783B4 DE 10134783 A DE10134783 A DE 10134783A DE 10134783 A DE10134783 A DE 10134783A DE 10134783 B4 DE10134783 B4 DE 10134783B4
- Authority
- DE
- Germany
- Prior art keywords
- plate
- element according
- partitions
- sound
- chambers
- 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 - Fee Related
Links
- 238000005192 partition Methods 0.000 claims abstract description 28
- -1 aluminum-polypropylene Chemical group 0.000 claims description 11
- 229920001155 polypropylene Polymers 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 3
- 238000000071 blow moulding Methods 0.000 claims description 2
- 239000011888 foil Substances 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims 3
- 238000013016 damping Methods 0.000 claims 2
- 239000002985 plastic film Substances 0.000 claims 1
- 229920006255 plastic film Polymers 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 13
- 239000000463 material Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 240000003517 Elaeocarpus dentatus Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- 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
- E04B2001/8263—Mounting of acoustical elements on supporting structure, e.g. framework or wall surface
- E04B2001/8281—Flat elements mounted parallel to a supporting surface with an acoustically active air gap between the elements and the mounting surface
-
- 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
- E04B2001/8423—Tray or frame type panels or blocks, with or without acoustical filling
- E04B2001/8433—Tray or frame type panels or blocks, with or without acoustical filling with holes in their face
-
- 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
- E04B2001/8485—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the opening being restricted, e.g. forming Helmoltz resonators
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Multimedia (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Laminated Bodies (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
Description
Die Erfindung bezieht sich auf ein Schallabschirmelement mit mindestens einer viele kleine Durchbrechungen aufweisenden schalldämpfenden Platte nach dem Oberbegriff des Anspruchs 1.The The invention relates to a Schallabschirmelement with at least a many small openings having sound-absorbing Plate according to the preamble of claim 1.
Derartige
Schallabschirmelemente, die beispielsweise durch Schalldämpfung zum
Schutz vor Schallausbreitung aus dem Lärmbereich eines Raumes in einen
Nachbarraum und/oder zum Abdecken schallreflektierender oder schallerzeugender
Bauteile verwendet werden, sind bereits bekannt (WO 00/68039,
Bei solchen Schallabschirmelementen ist es auch bereits bekannt, mehrere solcher mit vielen kleinen Durchbrechungen ver sehenen Platten parallel hintereinander vor bespielsweise der schallreflektierenden Wand anzuordnen und durch Abstandhalter voneinander im Abstand zu halten.at Such Schallabschirmelementen it is also already known, several Such with many small openings ver provided plates in parallel one behind the other before recording the sound-reflecting wall to arrange and to keep by spacers from each other at a distance.
Darüber hinaus ist es auch bekannt (DE-AS 1 180 155), eine aus mindestens drei Schichten bestehende Schalldämpfungsplatte mit gelochten Frontplatten und sandwichartig zwischen Front- und Rückplatte eingesetzter Hartfaserplatte auszurüsten; dabei sind auch große Löcher vorgesehen, welche durch das 3-Platten-System hindurchgehen und vor allem der Belüftung dienen.Furthermore It is also known (DE-AS 1 180 155), one of at least three Layers existing sound absorbing panel with perforated front panels and sandwiched between front and back Rear plate inserted Hardboard to equip; There are also big ones holes provided, which pass through the 3-plate system and especially the ventilation serve.
Bei
schallisolierenden, aus Kunststoff verformten Bauteilen ist es auch
bekannt (
Der Erfindung liegt die Aufgabe zugrunde, schalldämpfende Schallabschirmelemente der eingangs genannten Gattung hinsichtlich ihrer Schallabsorption auf möglichst einfache Weise und mit niedrigen Herstellungskosten noch weiter zu verbessern.Of the Invention is based on the object sound-absorbing Schallabschirmelemente of the type mentioned above with regard to their sound absorption on as possible simple way and with low production costs even further to improve.
Die Erfindung ist im Anspruch 1 gekennzeichnet und in weiteren Unteransprüchen und in der Beschreibung sind bevorzugte Ausbildungsformen beansprucht bzw. beschrieben.The Invention is characterized in claim 1 and in further subclaims and in the description preferred embodiments are claimed or described.
Es
hat sich sehr überraschenderweise
gezeigt, daß die
Schallabsorption dann erfindungsgemäß verbessert werden kann, wenn
hinter der Platte ein System von Kammern angeordnet ist, welche
durch Trennwände
voneinander getrennt sind. Die Platte dient dann gewissermaßen als
frontseitige Abdeckung des Kammersystems, bei dem die Trennwände im Wesentlichen
unter rech tem Winkel zur Platte verlaufen. Ein solches „Kasten-
bzw. Kassettensystem" ist
schematisch in
Bei der Erfindung werden die Kammern bevorzugt im Querschnitt rechteckförmig ausgebildet, so daß die Trennwände jeweils in einer im Wesentlichen geraden Ebene verlaufen, wodurch sich die Herstellung auch großflächiger Schallabschirmelemente sehr erleichtert. Die Trennwände können aber auch bienenwabenartig ausgebildet oder durch aneinandergelegte Rohrstücke gebildet sein. Die Kammern sollten eine lichte Breite zwischen 10 mm und 300 mm aufweisen. Die Trennwände sollten möglichst dünnwandig sein; es empfehlen sich Wandstärken zwischen 0,5 mm und 3 mm.at invention, the chambers are preferably rectangular in cross-section, So that the partitions each extending in a substantially straight plane, thereby the production of large-scale Schallabschirmelemente very relieved. The partitions can but also honeycomb-like or by juxtaposed pipe pieces be formed. The chambers should have a clear width between 10 mm and 300 mm. The partitions should be as possible thin-walled be; wall thicknesses are recommended between 0.5 mm and 3 mm.
Als Material für die Trennwände empfiehlt sich vor allem Polypropylen bei einer kasettierten Unterbodenverkleidung von Kraftfahrzeugen. Bei Hochtemperaturanwendungen sind auch Metalle, z.B. Aluminium, für die Trennwände vorteilhaft.When Material for the partitions especially polypropylene is recommended for a cased underbody paneling of motor vehicles. In high-temperature applications, metals, e.g. Aluminum, for the partitions advantageous.
Für die Platte ist ein Lochflächenverhältnis zwischen 1 % und 8 % besonders bevorzugt und der mittlere Durchmesser oder die Breite der kleinen Durchbrechungen sollte zwichen 0,05 mm und 1 mm betragen. Das System der Kammern und Trennwände sollte an der der Platte abgewandten Seite an eine Rückwand anschließen; diese kann gleichfalls als Platte ausgebildet sein. Die Rückwand kann aber auch fehlen.For the plate is a hole area ratio between 1% and 8% particularly preferred and the average diameter or The width of the small openings should be between 0.05 mm and 1 mm. The system of chambers and partitions should be at the plate facing away from a rear wall connect; this can also be formed as a plate. The back wall can but also missing.
Die Kammern sind bevorzugt luftgefüllt. Es wird vermutet, daß die Luftschwingungen hinter der mit kleinen Durchbrechungen, insbesondere kleinen kreisförmigen Löchern versehenen „Lochplatte" durch die als „Querwände" angeordneten Trennwände derart beeinflußt werden, daß ein erheblich größerer Anteil an „Schallenergie" in der davorliegenden mikroperforierten Platte gedämpft wird.The Chambers are preferably filled with air. It is believed that the Air vibrations behind the with small openings, in particular small circular holes provided "perforated plate" through the arranged as a "transverse walls" partitions in such a way affected be that one considerably larger proportion to "sound energy" in the one in front damped microperforated plate becomes.
Anhand der Zeichnung wird ein bevorzugtes Ausführungsbeispiel der Erfindung im Folgenden beschrieben. Dabei zeigen:Based The drawing will be a preferred embodiment of the invention described below. Showing:
Gemäß
Bei
einem Messungen unterworfenen Ausführungsbeispiel beträgt die Wanddicke
d der Platte
Deren
Breite B ist in der nachfolgenden Tabelle angegeben. Die Platte
Bei
dem vorliegenden Ausführungsbeispiel
weisen die Kammern
In
Das erfindungsgemäße Schallabschirmelement ist nicht nur in Räumen, sondern auch zur Abschirmung von Maschinen und lärmverursachenden Aggregaten in Kraftfahrzeugen anwendbar. Auch in Flugzeugen und insbesondere Fahrgastschiffen, in denen der Kabinenbereich besonders lärmgeschützt sein soll, ergeben sich bevorzugte Anwendungsbereiche.The Soundproofing element according to the invention is not only in rooms, but also for the shielding of machines and noise-causing aggregates applicable in motor vehicles. Also in airplanes and in particular Passenger ships in which the cabin area is particularly noise-protected should arise, there are preferred applications.
Die Herstellung des Schallabschirmelements kann durch beispielsweise folgende bevorzugte Herstellungsverfahren so erfolgen, daß die die Kammern bildenden Trennwände mit der die Kammern abdeckenden Platte bzw. Schicht eine mechanische Baueinheit bilden:
- 1. Es wird eine thermoplastische Kunststoff-Folie von einem Heizfeld erwärmt und dann insb. mittels Vakuum in ein die Kammern bildendes Tiefziehwerkzeug gezogen. Die Folie schmiegt sich der Kammerkontur an und erhärtet durch Erkalten. Die Durchbrechungen können durch Perforieren der Kammerböden, welche die Platte bzw. Schicht bilden, mittels Nadelfeldern hergestellt werden. Dies ist entweder noch im Tiefziehwerkzeug oder auch nachträglich nach dem Entformen möglich. Statt des. Vakuum-Tiefziehverfahrens ist auch ein entsprechendes Blasverfahren anwendbar, bei dem die thermoplastische Kunststoff-Folie durch den Blasdruck an die Kontur des formgebenden Blasformwerkzeugs gedrückt wird.
- 2. Es werden Vliese, Schäume, Folien oder plastische Massen in eine Kammerstruktur verpresst. Dabei ist das Kaltverpressen von vorher thermisch erhitzten thermoplastischen Materialien oder das Heißverpressen von duroplastischen Materialien möglich. Auch hier können die Durchbrechungen durch Perforieren entweder im Presswerkzeug selbst oder nachträglich eingebracht werden. Darüber hinaus ist es dabei auch möglich, schon vorab „perforiertes" Material entsprechend zu verformen. Dazu kann ein dünnes Vlies Anwendung finden, welches einen mittleren Öffnungsanteil und einen mittleren Öffnungsdurchmesser aufweist, welche den Bemessungsregeln für die Durchbrechungen des Oberbegriffs des Patentanspruchs 1 entsprechen.
- 3. Ein die Platte bzw. die Schicht einerseits und die Trennwände der Kammer andererseits integrierendes Bauteil kann auch durch Gießen, Spritzgießen, Spritzpressen oder Spritzprägen hergestellt werden. Dabei empfiehlt sich auch hier die Verwendung ein und desselben Materials für Platte und Trennwände. Nach einer bevorzugten Ausbildung werden an eine mit den Durchbrechungen versehenen insb. nadelgewalzten Folie aus Polypropylen, insb. eine Aluminiumpolypropylenverbundschicht, die Trennwände mit der Kammerstruktur aus insb. Polypropylen angespritzt.
- 1. It is heated by a heater and then esp. Pulled by vacuum into a forming the chambers deep-drawing tool a thermoplastic film. The film adapts to the chamber contour and hardens by cooling. The perforations can be made by perforating the chamber bottoms which form the plate or layer by means of needle fields. This is possible either in the deep-drawing tool or subsequently after removal from the mold. Instead of the. Vacuum thermoforming process, a corresponding blowing method is applicable, in which the thermoplastic resin film is pressed by the blowing pressure to the contour of the forming blow molding.
- 2. Nonwovens, foams, foils or plastic masses are pressed into a chamber structure. It is the cold pressing of previously thermally heated thermoplastic materials or the hot pressing of thermosetting materials possible. Again, the perforations can be introduced by perforation either in the press tool itself or subsequently. Moreover, it is also possible to correspondingly deform "perforated" material beforehand. For this purpose, a thin fleece can be used which has a mean opening proportion and a mean opening diameter, which correspond to the design rules for the apertures in the preamble of patent claim 1.
- 3. The plate or the layer on the one hand and the partitions of the chamber on the other hand integrating component can also be produced by casting, injection molding, transfer molding or injection compression molding. Here, too, the use of one and the same material for plate and partitions is recommended. According to a preferred embodiment, needle-rolled film of polypropylene, in particular an aluminum-polypropylene composite layer, which is provided with the apertures, is injection-molded onto the partitions with the chamber structure of, in particular, polypropylene.
Claims (16)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10134783A DE10134783B4 (en) | 2001-07-17 | 2001-07-17 | A sound proofing |
PCT/EP2002/006106 WO2003008237A1 (en) | 2001-07-17 | 2002-06-04 | Soundproofing element |
AT02764576T ATE283181T1 (en) | 2001-07-17 | 2002-06-04 | SOUND SHELLING ELEMENT |
DE50201635T DE50201635D1 (en) | 2001-07-17 | 2002-06-04 | A sound proofing |
EP02764576A EP1406792B1 (en) | 2001-07-17 | 2002-06-04 | Soundproofing element |
ES02764576T ES2235081T3 (en) | 2001-07-17 | 2002-06-04 | ACOUSTIC SCREENING ELEMENT. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10134783A DE10134783B4 (en) | 2001-07-17 | 2001-07-17 | A sound proofing |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10134783A1 DE10134783A1 (en) | 2003-02-13 |
DE10134783B4 true DE10134783B4 (en) | 2005-09-15 |
Family
ID=7692123
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10134783A Expired - Fee Related DE10134783B4 (en) | 2001-07-17 | 2001-07-17 | A sound proofing |
DE50201635T Revoked DE50201635D1 (en) | 2001-07-17 | 2002-06-04 | A sound proofing |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE50201635T Revoked DE50201635D1 (en) | 2001-07-17 | 2002-06-04 | A sound proofing |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1406792B1 (en) |
AT (1) | ATE283181T1 (en) |
DE (2) | DE10134783B4 (en) |
ES (1) | ES2235081T3 (en) |
WO (1) | WO2003008237A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4680963B2 (en) * | 2007-07-09 | 2011-05-11 | 株式会社神戸製鋼所 | Double wall structure with frame |
DE102010029409B4 (en) | 2010-05-27 | 2019-12-12 | Röchling Automotive AG & Co. KG | Thermal motor vehicle working space panel |
WO2013169788A2 (en) * | 2012-05-07 | 2013-11-14 | 3M Innovative Properties Company | Acoustic damping device and installation |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2950930A1 (en) * | 1978-12-27 | 1980-07-03 | Rolls Royce | ACOUSTIC LINING FOR FLOW CHANNELS, ESPECIALLY AT GAS TURBINE ENGINES |
DE29509301U1 (en) | 1995-06-07 | 1995-11-02 | Bantle, Helmut, 78727 Oberndorf | Cutters for duffle bags |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1352581A (en) * | 1963-04-03 | 1964-02-14 | Soundproofing slab of synthetic materials in the foam state, and method of manufacturing this slab | |
DE1264021B (en) * | 1962-12-01 | 1968-03-21 | Gruenzweig & Hartmann A G | Sound absorbing wall |
DE2408028B2 (en) * | 1974-02-20 | 1978-05-11 | Fa. Carl Freudenberg, 6940 Weinheim | Sound absorbing plate |
CH683855A5 (en) * | 1991-07-24 | 1994-05-31 | Zdzislaw Pregowski | Sound absorbing plate. |
CH692731A5 (en) * | 1998-01-09 | 2002-10-15 | Rieter Automotive Int Ag | Ultra-light, sound and shock absorbing kit. |
DE29803674U1 (en) * | 1998-03-03 | 1999-07-15 | M. Faist GmbH & Co. KG, 86381 Krumbach | Laminate |
WO2000068039A1 (en) * | 1999-05-06 | 2000-11-16 | Faist Automotive Gmbh & Co. Kg | Sound-shielding element, use thereof and method for producing the same |
-
2001
- 2001-07-17 DE DE10134783A patent/DE10134783B4/en not_active Expired - Fee Related
-
2002
- 2002-06-04 EP EP02764576A patent/EP1406792B1/en not_active Revoked
- 2002-06-04 ES ES02764576T patent/ES2235081T3/en not_active Expired - Lifetime
- 2002-06-04 DE DE50201635T patent/DE50201635D1/en not_active Revoked
- 2002-06-04 AT AT02764576T patent/ATE283181T1/en not_active IP Right Cessation
- 2002-06-04 WO PCT/EP2002/006106 patent/WO2003008237A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2950930A1 (en) * | 1978-12-27 | 1980-07-03 | Rolls Royce | ACOUSTIC LINING FOR FLOW CHANNELS, ESPECIALLY AT GAS TURBINE ENGINES |
DE29509301U1 (en) | 1995-06-07 | 1995-11-02 | Bantle, Helmut, 78727 Oberndorf | Cutters for duffle bags |
Also Published As
Publication number | Publication date |
---|---|
WO2003008237A1 (en) | 2003-01-30 |
ATE283181T1 (en) | 2004-12-15 |
DE50201635D1 (en) | 2004-12-30 |
DE10134783A1 (en) | 2003-02-13 |
ES2235081T3 (en) | 2005-07-01 |
EP1406792A1 (en) | 2004-04-14 |
EP1406792B1 (en) | 2004-11-24 |
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