US4494165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filament composite structures providing lightning strike and electromagnetic protection
Assignee: Technical Products Group Inc
•
Filing: 1980-11-13
•
Granted: 1985-01-15
•
Expires: 2000-11-13
Abstract
Abstract In a laminated structure, such as a structural component of an aerospace vehicle or the like, which is fabricated of layers of filament composite material, means is provided for protection against lightning strike damage and electromagnetic interference. In particular, the outer surface layer of the filament composite material is fabricated of conductive metallic-coated filaments to provide a conductive barrier to disperse the current from lightning or other electromagnetic sources. The filaments may be fabricated of a composite material such as glass which has an aluminum coating. The structure may be woven or filament wound with intermixed resin, and the metallic-coated filaments are cured simultaneously with the entire laminated structure of filament composite material.
Inventors
- 👤 Mahendra Maheshwari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:00
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/02; B32B5/00; B32B5/22; B32B5/24; B32B5/26; H; H05; H05F; H05F3/00; H05F3/02; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/20; B32B2307/202; B32B2307/212; B32B2605/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
82 words
A single, fully integrated laminated structure providing protection against lightning strike damage and electromagnetic interference, said structure comprising a lower area fabricated of filament composite material and only a surface area fabricated entirely of metallic-coated filaments, both areas and each area with the other being intermixed with epoxy resin, said structure being integrally formed in one piece by simultaneous curing of the whole integrated structure, said surface area providing a conductive barrier to disperse the current from lightning strike and electromagnetic sources.
Claim 2
Dependent Claim
82 words
A single, fully integrated laminated structure providing protection against lightning strike damage and electromagnetic interference, said structure comprising a lower area fabricated of filament composite material and only a surface area fabricated entirely of metallic-coated filaments, both areas and each area with the other being intermixed with epoxy resin, said structure being integrally formed in one piece by simultaneous curing of the whole integrated structure, said surface area providing a conductive barrier to disperse the current from lightning strike and electromagnetic sources.
Claim 3
Dependent Claim
20 words
A laminated structure as set forth in claim 1, wherein said filaments are fabricated of a composite material comprising glass.
Claim 4
Dependent Claim
18 words
A laminated structure as set forth in claim 2, wherein said filaments are coated with an aluminum material.
Claim 5
Dependent Claim
18 words
A laminated structure as set forth in claim 1 wherein said surface area is wound of metallic-coated filaments.
Claim 6
Dependent Claim
20 words
A laminated structure as set forth in claim 4, wherein said filaments are fabricated of a composite material comprising glass.
Claim 7
Dependent Claim
19 words
In a laminated structure as set forth in claim 4, wherein said filaments are coated with an aluminum material.
Claim 8
Dependent Claim
20 words
A laminated structure as set forth in claim 1, wherein said surface area of metallic-coated filaments comprises a woven layer.
Claim 9
Dependent Claim
18 words
A laminated structure as set forth in claim 1, wherein said filaments are coated with an aluminum material.
Claim 10
Dependent Claim
89 words
In an aerospace vehicle, a single, fully integrated structural element providing protection against lightning strike damage and electromagnetic interference, said structural element comprising a lower area fabricated of filament composite material and only a surface area fabricated entirely of metallic-coated filaments, both areas and each area with the other being intermixed with epoxy resin, said structural element being integrally formed in one piece by simultaneous curing of the whole integrated structural element, said surface area providing a conductive barrier to disperse the current from lightning strike and electromagnetic sources.
Claim 11
Dependent Claim
89 words
In an aerospace vehicle, a single, fully integrated structural element providing protection against lightning strike damage and electromagnetic interference, said structural element comprising a lower area fabricated of filament composite material and only a surface area fabricated entirely of metallic-coated filaments, both areas and each area with the other being intermixed with epoxy resin, said structural element being integrally formed in one piece by simultaneous curing of the whole integrated structural element, said surface area providing a conductive barrier to disperse the current from lightning strike and electromagnetic sources.
Claim 12
Dependent Claim
21 words
In an aerospace vehicle as set forth in claim 9, wherein said filaments are fabricated of a composite material comprising glass.
Claim 13
Dependent Claim
19 words
In an aerospace vehicle as set forth in claim 10, wherein said filaments are coated with an aluminum material.
Claim 14
Dependent Claim
29 words
In an aerospace vehicle as set forth in claim 9, wherein said structural component is filament wound and the surface area thereof is wound of said conductive metallic-coated filaments.
Claim 15
Dependent Claim
21 words
In an aerospace vehicle as set forth in claim 12, wherein said filaments are fabricated of a composite material comprising glass.
Claim 16
Dependent Claim
19 words
In an aerospace vehicle as set forth in claim 13, wherein said filaments are coated with an aluminum material.
Claim 17
Dependent Claim
21 words
In an aerospace vehicle as set forth in claim 9, wherein said surface area of metallic-coated filaments comprises a woven layer.
Claim 18
Dependent Claim
19 words
In an aerospace vehicle as set forth in claim 9, wherein said filaments are coated with an aluminum material.
Claim 19
Dependent Claim
86 words
In a laminated structure fabricated of layers of filament composite material and providing protection against lightning strike damage and electromagnetic interference, the improvement comprising only an outer surface layer fabricated entirely of metallic-coated filaments, both the outer surface layer and the lower layers and each layer with the other being intermixed with resin, and the outer surface layer being cured at the same time as the lower layers so that said outer surface layer is fully structurally integrated with said lower layers of filament composite material.
Claim 20
Dependent Claim
86 words
In a laminated structure fabricated of layers of filament composite material and providing protection against lightning strike damage and electromagnetic interference, the improvement comprising only an outer surface layer fabricated entirely of metallic-coated filaments, both the outer surface layer and the lower layers and each layer with the other being intermixed with resin, and the outer surface layer being cured at the same time as the lower layers so that said outer surface layer is fully structurally integrated with said lower layers of filament composite material.
Claim 21
Dependent Claim
22 words
In a laminated structure as set forth in claim 17, wherein said outer surface layer of metallic-coated filaments comprises a wound layer.
Claim 22
Dependent Claim
22 words
In a laminated structure as set forth in claim 17, wherein said outer surface layer of metallic-coated filaments comprises a woven layer.
References Cited (Backward Citations)
US2938821A
Cited
US3091561A
Cited
US3086902A
Cited
US3288175A
Cited
US3758329A
Cited
US3958066A
Cited
US3755713A
Cited
US3989984A
Cited
US4330811A
Cited
US4237514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |