US3616115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight ballistic armor
Assignee: Boeing North American Inc
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Filing: 1968-09-24
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Granted: 1971-10-26
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Expires: 1988-09-24
Abstract
Abstract A lightweight composite armor plate is disclosed wherein successive layers of small discrete ceramic blocks are encapsulated within a metallic matrix by solid-state diffusion bonding. Residual stress effects from the bonding step prestress the blocks in compression, whereby a greater amount of energy from an impacting projectile is required to shatter the ceramic.
Inventors
- 👤 Norman Klimmek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:42
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; F41H5/0492; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/16; Y10T428/161; Y10T428/163; Y10T428/164; Y10T428/166; Y10T428/24; Y10T428/24752
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
43 words
A diffusion-bonded structure for ballistic armor protection and the like, comprising: a plurality of discrete ceramic blocks, and a diffusion-bonded metallic matrix encapsulating said blocks and applying continuous residual compressive force thereto as a result of such diffusion bonding thereby prestressing said blocks.
Claim 2
Dependent Claim
43 words
A diffusion-bonded structure for ballistic armor protection and the like, comprising: a plurality of discrete ceramic blocks, and a diffusion-bonded metallic matrix encapsulating said blocks and applying continuous residual compressive force thereto as a result of such diffusion bonding thereby prestressing said blocks.
Claim 3
Dependent Claim
46 words
The structure set forth in claim 1 above, wherein: said blocks are arranged in a plurality of layers each containing a plurality of blocks, said blocks in each of said layers being staggered relative to the other of said layers in the manner of chimney bricks.
Claim 4
Dependent Claim
25 words
The structure set forth in claim 2 above, wherein: said metallic matrix includes at least one relatively massive frame around the periphery of said layers.
Claim 5
Dependent Claim
74 words
In a diffusion-bonded panel for ballistic armor protection: at least one mass of refractory material arranged to present a surface area portion for impact of a projectible against said area portion, and metallic constraining means comprising discrete portions joined by diffusion-bonding surrounding said mass and applying continuous compressive force thereon substantially toward the geometric center of said mass as a result of such diffusion bonding in an amount sufficient to prestress said mass throughout.
Claim 6
Dependent Claim
74 words
In a diffusion-bonded panel for ballistic armor protection: at least one mass of refractory material arranged to present a surface area portion for impact of a projectible against said area portion, and metallic constraining means comprising discrete portions joined by diffusion-bonding surrounding said mass and applying continuous compressive force thereon substantially toward the geometric center of said mass as a result of such diffusion bonding in an amount sufficient to prestress said mass throughout.
Claim 7
Dependent Claim
23 words
The structure set forth in claim 4 above, wherein: said constraining means includes a relatively massive frame around the periphery of said panel.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |