US4479992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound absorbing structural element
Assignee: Matec Holding AG
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Filing: 1983-09-15
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Granted: 1984-10-30
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Expires: 2003-09-15
Abstract
Abstract A sound insulating panel is provided having a support layer of honeycomb material, and a pair of covering layers, at least one of which is air-permeable. The support, honeycomb layer has a compressive strength greater than the compressive strength of each of the covering layers, in a direction transverse to the faces thereof, and has a tensile strength which is lesser, in the general direction parallel to the faces, than that each of the covering layers. The support layer is compacted over a part of its extent to a substantially closed layer of reduced thickness, this being, preferably, in the region of the border. A method of making an insulating construction element as described.
Inventors
- 👤 Willy H/a/ eseker
- 👤 Robert Vignal
- 👤 Guy Ferrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:51
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/12; B29; B29D; B29D24/00; B29D24/002; B29D24/005; B29D24/007; B32B27/00; B32B27/12; B32B27/30; B32B27/304; B32B29/00; B32B29/02; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/04; B32B7/12; B60; B60R; B60R13/00; B60R13/02; B60R13/0212; B60R13/0225; B60R13/08; B60R13/0815; G; G10; G10K; G10K11/00; G10K11/16; G10K11/172; B29K; B29K2995/00; B29K2995/0037; B29K2995/0065; B32B2260/00; B32B2260/02; B32B2260/028; B32B2260/04; B32B2260/046; B32B2305/00; B32B2305/02; B32B2305/024; B32B2307/00; B32B2307/10; B32B2307/102; B32B2307/70; B32B2307/724; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2317/00; B32B2317/12; B32B2317/122; B32B2605/00; B32B2605/08; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24174; Y10T428/24479; Y10T428/24488; Y10T428/24777
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A sound-absorbing self-supporting roof-liner for the sheet metal roofs of automotive vehicles comprising a support layer having covering layers on each of its two outer faces, at least one said covering layer being permeable to air, the support layer being an open-cell honeycomb structure of impregnated cardboard or craft paper with cells extending substantially traversely to the faces, a said air permeable layer comprising a nonwoven resin-bonded fibrous felt, one said layer being a decorative layer of textile material or porous PVC foil, said support layer together with its covering layers moulded to the contours of the sheet metal of a vehicle roof and compacted and shaped to less than the support layer thickness over a considerable part of its surface area thereby to conform to the functional shape of the surface facing the passenger compartment.
Claim 2
Dependent Claim
136 words
A sound-absorbing self-supporting roof-liner for the sheet metal roofs of automotive vehicles comprising a support layer having covering layers on each of its two outer faces, at least one said covering layer being permeable to air, the support layer being an open-cell honeycomb structure of impregnated cardboard or craft paper with cells extending substantially traversely to the faces, a said air permeable layer comprising a nonwoven resin-bonded fibrous felt, one said layer being a decorative layer of textile material or porous PVC foil, said support layer together with its covering layers moulded to the contours of the sheet metal of a vehicle roof and compacted and shaped to less than the support layer thickness over a considerable part of its surface area thereby to conform to the functional shape of the surface facing the passenger compartment.
Claim 3
Dependent Claim
17 words
A sound-absorbing self-supporting roof-liner according to claim 1, wherein the edge the support layer is completely compacted.
Claim 4
Dependent Claim
49 words
A sound-absorbing self-supporting roof-liner according to claim 1, and in combination therewith, an automobile roof formed of a plate, said automobile roof being of contoured, non-planar configuration, said roof-liner bonded thereto, whereby to dampen noise-producing bending oscillations of the roof plate and to absorb sound generated within the automobile.
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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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |