Patent US2083798A successfully refreshed from Google Patents.
Patent US3962976A successfully refreshed from Google Patents.
US3962976A
Expired / Lapsed
US
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Composite armor structure
Assignee: Alcoa Corp
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Filing: 1971-08-16
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Granted: 1976-06-15
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Expires: 1991-08-16
Abstract
Abstract A composite armor structure which resists passage of armor piercing projectiles and shell fragments therethrough and also resists rearward discharge of spalled material from the armor structure. A frontal plate composed of a high tensile strength aluminum alloy having an ultimate tensile strength greater than 70 ksi. A backup plate composed of an intermediate tensile strength aluminum alloy having an ultimate tensile strength of about 30 to 70 ksi. A non-metallic filler material interposed between the frontal plate and backup plate. The non-metallic filler material may be selected from the group consisting of epoxies, phenolics, polyesters, polycarbonates and high density polyvinyls.
Inventors
- 👤 Ronald A. Kelsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:03
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0442; F41H5/0457; Y; Y10; Y10S; Y10S428/00; Y10S428/911
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A composite armor structure comprising a frontal plate composed of an aluminum-zinc alloy having an ultimate tensile strength greater than 70 ksi, a backup plate composed of an aluminum-magnesium alloy having an ultimate tensile strength of about 30 to 70 ksi, a non-metallic filler material interposed between said frontal plate and said backup plate, and said filler material being selected from the group consisting of epoxies, phenolics, polyesters, polycarbonates and high density polyvinyls, whereby said composite armor structure resists passage of shell fragments therethrough and resists rearward discharge of spalled material upon frontal plate impact by a projectile.
Claim 2
Dependent Claim
98 words
A composite armor structure comprising a frontal plate composed of an aluminum-zinc alloy having an ultimate tensile strength greater than 70 ksi, a backup plate composed of an aluminum-magnesium alloy having an ultimate tensile strength of about 30 to 70 ksi, a non-metallic filler material interposed between said frontal plate and said backup plate, and said filler material being selected from the group consisting of epoxies, phenolics, polyesters, polycarbonates and high density polyvinyls, whereby said composite armor structure resists passage of shell fragments therethrough and resists rearward discharge of spalled material upon frontal plate impact by a projectile.
Claim 3
Dependent Claim
44 words
The composite armor structure of claim 1 including means securing said frontal plate to said backup plate with said filler material secured therebetween, and said frontal plate has a thickness of about one-fourth to two times that of the thickness of said backup plate.
Claim 4
Dependent Claim
39 words
The composite armor structure of claim 2 including said frontal plate is selected from the group consisting of 7075 and 7178, and said backup plate is composed of an alloy selected from the group consisting of 5083 and 5456.
Claim 5
Dependent Claim
29 words
The composite armor structure of claim 3 including said frontal plate aluminum alloy is in the T6 temper, and said backup plate aluminum alloy is in the H117 temper.
Claim 6
Dependent Claim
43 words
The composite armor structure of claim 4 including said frontal plate has a forwardly exposed substantially flat surface, said backup plate has a rearwardly exposed substantially flat surface, and said substantially flat plate surfaces are disposed generally parallel with respect to each other.
Claim 7
Dependent Claim
25 words
The composite armor structure of claim 5 including said filler material is substantially continuous and generally coextensive with said frontal plate and said backup plate.
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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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |