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US4463678A Expired / Lapsed US ⏱️ 0.0 years remaining

Hybrid shaped-charge/kinetic/energy penetrator

Assignee: United States Department of the Navy
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Filing: 1980-04-01
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Granted: 1984-08-07
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Expires: 2000-04-01
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Abstract

Abstract This invention is directed to the construction of armor-piercing projecti which combine the enhanced kinetic energy penetration due to metal matrix composite materials with that of a shaped-charge jet to defeat armor not vulnerable to either weapon alone.

Inventors

  • 👤 Raymond J. Weimer
  • 👤 Chulho Kim

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 09:28
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/04; F42B12/10; F42B12/16

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 129 words
A hybrid projectile which comprises: a nose section of high density composite material; a cylindrical middle section in axial alignment with said nose section and joined thereto in end-to-end relationship; said cylindrical middle section formed of a metal composite unidirectionally reinforced with continuous fibers selected from the group consisting of boron or silicon carbide; an aft section in axial alignment with said middle section, said aft section including a solid end portion and a cylindrical portion, said cylindrical portion joined in end-to-end relationship with said cylindrical middle section; a shaped charge confined within said cylindrical portion of said aft section; shaped-charge liner means enclosed by said shaped charge within said cylindrical portion of said aft section; and inertial fuse means confined within said solid portion of said aft section.
Claim 2
Dependent Claim 129 words
A hybrid projectile which comprises: a nose section of high density composite material; a cylindrical middle section in axial alignment with said nose section and joined thereto in end-to-end relationship; said cylindrical middle section formed of a metal composite unidirectionally reinforced with continuous fibers selected from the group consisting of boron or silicon carbide; an aft section in axial alignment with said middle section, said aft section including a solid end portion and a cylindrical portion, said cylindrical portion joined in end-to-end relationship with said cylindrical middle section; a shaped charge confined within said cylindrical portion of said aft section; shaped-charge liner means enclosed by said shaped charge within said cylindrical portion of said aft section; and inertial fuse means confined within said solid portion of said aft section.
Claim 3
Dependent Claim 38 words
A hybrid projectile as claimed in claim 1 in which: said shaped-charge liner means is located a distance of from 11/2 to 2 times the diameter of the shaped charge from the aft end of said nose section.
Claim 4
Dependent Claim 41 words
A hybrid projectile as claimed in claim 1 in which: said nose section is made of a high density metal matrix composite material comprised of a tungsten-fiber-reinforced matrix material selected from the group consisting of aluminum, copper, steel, or depleted uranium.
Claim 5
Dependent Claim 57 words
The invention according to claim 1 wherein the nose section is formed of a high density composite metal material of which one component is selected from the group consisting of aluminum, copper, steel or depleted uranium and is reinforced with tungsten fibers for defining a kinetic energy penetrator adapted to penetrate into armor substantially without diametral expansion.
Claim 6
Dependent Claim 25 words
The invention according to claims 1 or 4 wherein the cylindrical middle section is in the form of a tube of composite material including aluminum.
Claim 7
Dependent Claim 150 words
A hybrid projectile for use against heavy armor which is protected by light armor spaced outwardly therefrom for intercepting incoming projectiles and causing their premature detonation at an ineffective distance from the heavy armor, comprising: a nose section adapted for penetrating armor; an aft section carrying a forward facing shaped charge; a middle section connecting the nose section and aft section resistant to collapse for maintaining the shaped charge face at a desired stand off distance from the rear of the nose section upon penetration of the nose section into heavy armor; and an inertial fuse in the aft section connected with the shaped charge and adapted to activate only upon coming to rest; whereby the projectile is adapted to pass completely through outwardly spaced light armor without ignition and have its shaped charge ignited only after the nose section has penetrated into the heavy armor and come to rest.
Claim 8
Dependent Claim 150 words
A hybrid projectile for use against heavy armor which is protected by light armor spaced outwardly therefrom for intercepting incoming projectiles and causing their premature detonation at an ineffective distance from the heavy armor, comprising: a nose section adapted for penetrating armor; an aft section carrying a forward facing shaped charge; a middle section connecting the nose section and aft section resistant to collapse for maintaining the shaped charge face at a desired stand off distance from the rear of the nose section upon penetration of the nose section into heavy armor; and an inertial fuse in the aft section connected with the shaped charge and adapted to activate only upon coming to rest; whereby the projectile is adapted to pass completely through outwardly spaced light armor without ignition and have its shaped charge ignited only after the nose section has penetrated into the heavy armor and come to rest.
Claim 9
Dependent Claim 42 words
The invention according to claim 6 wherein the middle section maintains the face of the shaped charge at a stand-off distance from the aft end of the nose section which is around 11/2 to 2 times the diameter of the shaped charge.
Claim 10
Dependent Claim 26 words
The invention according to claim 6 or 7 wherein the middle section comprises a cylindrical tubular member axially aligned between the nose section and aft section.
Claim 11
Dependent Claim 30 words
The invention according to claim 8 wherein the tubular member is a metal composite including aluminum reinforced with continuous fibers selected from the group consisting of boron or silicon fibers.
Claim 12
Dependent Claim 18 words
The invention according to claim 6 wherein the nose section is formed of a high density metal composite.
Claim 13
Dependent Claim 34 words
The invention according to claim 6 or 10 wherein the high density metal composite nose section is a tungsten fiber reinforced material selected from the group consisting of aluminum, copper, steel or depleted uranium.

References Cited (Backward Citations)

US3025794A Cited
US3613585A Cited
US3259064A Cited
US3742854A Cited
US3661086A Cited
US4109576A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1987-08-07 1988-02-06 1988-08-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1991-08-07 1992-02-06 1992-08-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1995-08-07 1996-02-06 1996-08-07 $7700.00 Window Closed / Lapsed

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