US4015535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hypervelocity spallators
Assignee: United States Department of the Army
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Filing: 1976-10-22
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Granted: 1977-04-05
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Expires: 1996-10-22
Abstract
Abstract The invention relates to hypervelocity projectiles of such mass, configuron, density and material that upon impact with targeted armor backface spallation occurs in which a large quantity of fragments are ejected from the backface although there has been no penetration of the projectile through the armor.
Inventors
- 👤 John W. Bond, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:21
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/04; F42B12/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A hypervelocity projectile means for producing backface spallation of armor plate, upon impacting said armor plate at velocities of at least 3 km/sec, to an extent of more than 20 times the mass of the projectile means without penetration of said projectile means through said armor plate comprising: a. a body having a tip of ablation alleviating material; b. a secondary tip of high density material located rearwardly adjacent to said tip of ablation alleviating material; and c. at least two stress wave shaping segments positioned rearwardly of said secondary tip, said wave shaping segments having different impedance factors which increase in value from the frontmost shaping segment to the rearmost shaping segment.
Claim 2
Dependent Claim
113 words
A hypervelocity projectile means for producing backface spallation of armor plate, upon impacting said armor plate at velocities of at least 3 km/sec, to an extent of more than 20 times the mass of the projectile means without penetration of said projectile means through said armor plate comprising: a. a body having a tip of ablation alleviating material; b. a secondary tip of high density material located rearwardly adjacent to said tip of ablation alleviating material; and c. at least two stress wave shaping segments positioned rearwardly of said secondary tip, said wave shaping segments having different impedance factors which increase in value from the frontmost shaping segment to the rearmost shaping segment.
Claim 3
Dependent Claim
13 words
The hypervelocity projectile of claim 1 wherein said body is generally conically shaped.
Claim 4
Dependent Claim
38 words
The hypervelocity projectile of claim 1 wherein there are three stress wave shaping segments and, wherein the first segment is formed of nylon, the second segment is formed of brass and the third segment is formed of steel.
Claim 5
Dependent Claim
19 words
The hypervelocity projectile of claim 1 wherein at least one of said segments is formed of a liquid material.
Claim 6
Dependent Claim
13 words
The hypervelocity projectile of Claim 3 wherein one said liquid material is water.
Claim 7
Dependent Claim
14 words
The hypervelocity projectile of claim 3 wherein one said liquid material is an oil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |