Patent US4739690A successfully refreshed from Google Patents.
US4739690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballistic armor with spall shield containing an outer layer of plasticized resin
Assignee: Ceradyne Inc
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Filing: 1986-11-06
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Granted: 1988-04-26
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Expires: 2006-11-06
Abstract
Abstract A spall shield for armor plate for restraining at least a portion of flying fragments resulting from impact of a projectile with said armor plate, comprises a plasticized resin of the type commonly used as an interlayer of safety plate glass such as for example, plasticized polyvinyl acetal resin or plasticized polyvinyl butyral resin. The novel spall shield replaces nylon cloth, rubber, felt or resin impregnated glass fabric of the prior art while being at least as thin and light as the adhesive commonly used to adhere such prior art spall shield materials to the armor plate. The spall shield of the present invention is substantially lower in weight and substantially more efficient in performance than conventional spall shields.
Inventors
- 👤 Joel P. Moskowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:41
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/02; B32B17/04; F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; F41H5/0428; F41H5/0435; Y; Y10; Y10S; Y10S428/00; Y10S428/909; Y10T; Y10T428/00; Y10T428/31
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
71 words
An improved ballistic armor of the type having a laminated structure of a layer of ceramic material, a layer of reinforced fiber material and a spall shield, the latter being used to at least partially restrain fragments of the ceramic material and of a projectile impacting the armor; the improvement comprising: a spall shield formed of a plasticized resin adhered to the ceramic material as the outer layer of said armor.
Claim 2
Dependent Claim
71 words
An improved ballistic armor of the type having a laminated structure of a layer of ceramic material, a layer of reinforced fiber material and a spall shield, the latter being used to at least partially restrain fragments of the ceramic material and of a projectile impacting the armor; the improvement comprising: a spall shield formed of a plasticized resin adhered to the ceramic material as the outer layer of said armor.
Claim 3
Dependent Claim
14 words
The improvement recited in claim 1 wherein said plasticized resin is polyvinyl acetal resin.
Claim 4
Dependent Claim
14 words
The improvement recited in claim 1 wherein said plasticized resin is polyvinyl butyral resin.
Claim 5
Dependent Claim
13 words
The improvement recited in claim 1 wherein said ceramic material is boron carbide.
Claim 6
Dependent Claim
12 words
The improvement recited in claim 1 wherein said fiber material is fiberglass.
Claim 7
Dependent Claim
12 words
The improvement recited in claim 1 wherein said fiber material is Kevlar.
Claim 8
Dependent Claim
33 words
Armor plate comprising a spall shield formed of a layer of a adhesive resin adapted to at least partially restrain flying fragments generated by the impact of a projectile with said armor plate.
Claim 9
Dependent Claim
33 words
Armor plate comprising a spall shield formed of a layer of a adhesive resin adapted to at least partially restrain flying fragments generated by the impact of a projectile with said armor plate.
Claim 10
Dependent Claim
15 words
The armor plate recited in claim 7 wherein said adhesive resin is polyvinyl acetal resin.
Claim 11
Dependent Claim
15 words
The armor plate recited in claim 7 wherein said adhesive resin is polyvinyl butyral resin.
Claim 12
Dependent Claim
21 words
The armor plate recited in claim 7 wherein said resin is any resin useable as the interlayer in safety plate glass.
Claim 13
Dependent Claim
31 words
The armor plate recited in claim 7 further comprising a layer of ceramic material adhered to said spall shield and a layer of reinforced fiber material adhered to said ceramic material.
Claim 14
Dependent Claim
14 words
The armor plate recited in claim 11 wherein said ceramic material is boron carbide.
Claim 15
Dependent Claim
14 words
The armor plate recited in claim 11 wherein said reinforced fiber material is fiberglass.
Claim 16
Dependent Claim
14 words
The armor plate recited in claim 11 wherein said reinforced fiber material is Kevlar.
Claim 17
Dependent Claim
30 words
The armor plate recited in claim 7 further comprising a layer of ceramic material adhered to said spall shield and a layer of backing material adhered to said ceramic material.
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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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |