US3913488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballistic disc
Assignee: United States Department of the Army
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Filing: 1973-09-17
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Granted: 1975-10-21
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Expires: 1993-09-17
Abstract
Abstract Spherically curved ballistic discs of substantially circular periphery, which are of greater thickness at the central portion than at the peripheral portion are positioned in an apertured casing with the concave sides of the discs facing outwardly. An explosive train in the casing serves to propel the disc toward the target at very high velocities and, during initial flight, the concave disc configuration inverts to a convex streamlined shape. The disc does not disintegrate prior to impact, and retains more than 95 percent of its original mass.
Inventors
- 👤 Bryant R Dunetz
- 👤 Seymour Kronman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:47
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/04; F42B12/10; F42B12/14; F42B1/00; F42B1/02; F42B1/028; F42B12/20; F42B12/22; F42B12/32
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
A substantially spherically curved metallic high-velocity ballistic disc of substantially circular periphery, said disc being non-disintegrating prior to impact and having a concave and a convex side, the curved central portion of said disc being of greater thickness than the peripheral portion of said disc, said disc prior to firing being yieldingly retainable about its periphery within a circular aperture of a casing with the concave side of said disc facing outwardly, and said disc upon being fired assuming a convex streamlined shape.
Claim 2
Dependent Claim
83 words
A substantially spherically curved metallic high-velocity ballistic disc of substantially circular periphery, said disc being non-disintegrating prior to impact and having a concave and a convex side, the curved central portion of said disc being of greater thickness than the peripheral portion of said disc, said disc prior to firing being yieldingly retainable about its periphery within a circular aperture of a casing with the concave side of said disc facing outwardly, and said disc upon being fired assuming a convex streamlined shape.
Claim 3
Dependent Claim
17 words
A ballistic disc according to claim 1, wherein said curved central portion is of substantially uniform thickness.
Claim 4
Dependent Claim
24 words
A ballistic disc according to claim 1, wherein the diameter of said curved central portion is about 1/2 of the diameter of said disc.
Claim 5
Dependent Claim
24 words
A ballistic disc according to claim 2, wherein the diameter of said curved central portion is about 1/2 of the diameter of said disc.
Claim 6
Dependent Claim
12 words
A ballistic disc according to claim 1, said disc being of steel.
Claim 7
Dependent Claim
13 words
A ballistic disc according to claim 5, wherein said steel is mild steel.
Claim 8
Dependent Claim
28 words
A munition comprising a casing having a curved side, a plurality of round apertures in said side, and ballistic discs according to claim 1 seated in said apertures.
Claim 9
Dependent Claim
13 words
A munition according to claim 7 wherein said casing is of plastics material.
Claim 10
Dependent Claim
30 words
A munition according to claim 7 wherein said casing is of frustoconical configuration and wherein said apertures are arranged in at least one circle in the side of said frustocone.
Claim 11
Dependent Claim
17 words
A munition according to claim 9 wherein said apertures are arranged in a plurality of parallel circles.
Claim 12
Dependent Claim
16 words
A munition according to claim 7 wherein said ballistic discs are adhesively connected to said casing.
Claim 13
Dependent Claim
14 words
A munition according to claim 7, and including an explosive propellant within said casing.
References Cited (Backward Citations)
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US2379257A
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US3517615A
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US3386380A
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |