US4029838A
Expired / Lapsed
US
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Hybrid composite laminate structures
Assignee: National Aeronautics and Space Administration
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Filing: 1975-09-24
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Granted: 1977-06-14
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Expires: 1995-09-24
Abstract
Abstract The invention relates to laminate structures and specifically to essentially anisotropic fiber composite laminates wherein metal foils are selectively disposed within the laminate to produce increased resistance to high velocity impact, fracture, surface erosion, and other stresses within the laminate.
Inventors
- 👤 Christos C. Chamis
- 👤 Raymond F. Lark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:57
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/14; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/088; B32B7/00; B32B7/04; B32B7/12; B64; B64C; B64C1/00; B64C1/06; B29K; B29K2705/00; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/023; B32B2307/00; B32B2307/70; B32B2307/706; B32B2311/00; B32B2311/18; B64C2001/0054; B64C2001/0072; B64C2001/0081; Y; Y02; Y02T; Y02T50/00; Y02T50/40; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/911; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249927; Y10T428/24994; Y10T428/249942; Y10T428/249945; Y10T428/24995; Y10T428/249952; Y10T428/25; Y10T428/256; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
A hybrid structural laminate comprising alternating plies of a matrix material and planar metallic foil; said matrix material being embedded with fiber elements having substantially unidirectional strength characteristics, said fiber elements being oriented within said matrix material with the longitudinal axes thereof extending in substantially the same direction; said foil plies alternating within the laminate structure with said matrix material plies, said matrix material being metal for outermost plies and non-metallic for innermost plies; and said fiber embedded metal matrix material being aluminum with boron fibers therein.
Claim 2
Dependent Claim
87 words
A hybrid structural laminate comprising alternating plies of a matrix material and planar metallic foil; said matrix material being embedded with fiber elements having substantially unidirectional strength characteristics, said fiber elements being oriented within said matrix material with the longitudinal axes thereof extending in substantially the same direction; said foil plies alternating within the laminate structure with said matrix material plies, said matrix material being metal for outermost plies and non-metallic for innermost plies; and said fiber embedded metal matrix material being aluminum with boron fibers therein.
Claim 3
Dependent Claim
17 words
The laminate of claim 1 wherein the plies are bonded together by means of an adhesive material.
Claim 4
Dependent Claim
102 words
A hybrid structural laminate comprising alternating plies of a matrix material and planar metallic foil; said matrix material being embedded with fiber elements having substantially unidirectional strength characteristics, said fiber elements being oriented within said matrix material with the longitudinal axes thereof extending in substantially the same direction; said foil plies alternating within the laminate structure with said matrix material plies, said matrix material being metal for outermost plies and nonmetallic for innermost piles; said fiber embedded matrix material being aluminum with boron fibers therein and wherein the non-metal fiber-embedded matrix material comprises graphite fibers embedded in an epoxy resin matrix material.
Claim 5
Dependent Claim
102 words
A hybrid structural laminate comprising alternating plies of a matrix material and planar metallic foil; said matrix material being embedded with fiber elements having substantially unidirectional strength characteristics, said fiber elements being oriented within said matrix material with the longitudinal axes thereof extending in substantially the same direction; said foil plies alternating within the laminate structure with said matrix material plies, said matrix material being metal for outermost plies and nonmetallic for innermost piles; said fiber embedded matrix material being aluminum with boron fibers therein and wherein the non-metal fiber-embedded matrix material comprises graphite fibers embedded in an epoxy resin matrix material.
Claim 6
Dependent Claim
14 words
The laminate of claim 3 wherein the plies of metallic foil comprise titanium metal.
Claim 7
Dependent Claim
25 words
The laminate of claim 4 wherein the titanium foil plie are disposed within the laminate at least on the upper and lower external surfaces thereof.
Claim 8
Dependent Claim
25 words
The laminate of claim 5 wherein the titanium foil plies are double layered on said surfaces and bonded together by means of an adhesive material.
Claim 9
Dependent Claim
23 words
The laminate of claim 5 wherein the titanium foil plies alternate within the laminate structure with the boron/aluminum plies and the graphite/epoxy plies.
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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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |