US4709781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound-damping and heat-insulating composite plate
Assignee: Austria Metall AG
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Filing: 1985-11-18
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Granted: 1987-12-01
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Expires: 2005-11-18
Abstract
Abstract A sound-damping composite panel with elastic properties is provided by disposing a prefabricated porous core made from rubber granules or scrap, e.g. rubber tire scrap, between a pair of metal layers or sheets, e.g. of aluminum, and adhesively bonding the metal layers to the core under heat and pressure.
Inventors
- 👤 Wilhelm Scherzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:54
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/06; B32B15/18; B32B15/20; B32B25/00; B32B25/04; B32B25/042; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B32B2272/00; B32B2305/00; B32B2305/02; B32B2305/026; B32B2307/00; B32B2307/50; B32B2307/56; B32B2311/00; B32B2311/24; B32B2311/30; B32B2319/00; E04B2001/742; E04B2001/746; E04B2001/8457; E04B2001/8461; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249986; Y10T428/249987; Y10T428/24999; Y10T428/25; Y10T428/254; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31707
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
49 words
A sound-damping composite body consisting essentially of two metal cover layers and a porous core layer, said core layer being positioned between the two metal cover layers and bonded to each of said metal layers, said core layer being composed of interbonded particles of rubber forming pores between them.
Claim 2
Dependent Claim
49 words
A sound-damping composite body consisting essentially of two metal cover layers and a porous core layer, said core layer being positioned between the two metal cover layers and bonded to each of said metal layers, said core layer being composed of interbonded particles of rubber forming pores between them.
Claim 3
Dependent Claim
12 words
The body defined in claim 1 wherein said particles are rubber scrap.
Claim 4
Dependent Claim
12 words
The body defined in claim 1 wherein said particles are rubber granules.
Claim 5
Dependent Claim
65 words
The body defined in claim 1 further comprising an adhesive foil between said core and said respective metal layers, said adhesive foil having a first surface adjacent a respective metal layer whereon is formed a metal bonding adhesive affixed to said respective metal layer and a second surface of said foil adjacent said core wherein is formed a rubber bonding adhesive affixed to said core.
Claim 6
Dependent Claim
24 words
The body defined in claim 1 wherein said metal layers are bonded to said core by a thermally activated adhesive under heat and pressure.
Claim 7
Dependent Claim
15 words
The body defined in claim 1 wherein said particles are milled old pneumatic tire scrap.
Claim 8
Dependent Claim
17 words
The body defined in claim 1 wherein said particles are interbonded in said core with an adhesive.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |