# US 2014/0190342 A1 · Object protection from hollow charges and method for the production thereof

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- Number: US 2014/0190342 A1
- Document ID: US20140190342A1
- Status: Published application
- Kind: A1
- Application number: 14/187,667
- Filed: 2014-02-24
- Published: 2014-07-10
- Earliest claimed: 2008-12-29
- Assignees: RUAG Schweiz AG
- Applicants: RUAG Schweiz AG
- Inventors: Marc RADSTAKE; Hanspeter KAUFMANN
- Web page: https://patentgrep.com/patent/US20140190342A1

## CPC

- F41H 5/02: Plate construction
- F41H 5/023: {Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile}
- F41H 5/0492: {Layered armour containing hard elements, e.g. plates, spheres, rods, separated from each other, the elements being connected to a further flexible layer or being embedded in a plastics or an elastomer matrix}
- Y10T 29/49: Method of mechanical manufacture
- Y10T 29/49826: Assembling or joining
- Y10T 428/24058: including grain, strips, or filamentary elements in respective layers or components in angular relation
- F41H: ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Lightly armored vehicles and stationary objects are often the target of attacks by hollow-charge projectiles. Numerous variants of armor plating have been developed to counter such attacks, which results in additional loads, and these require expensive production. A light protective layer (1) which is simple to produce contains rods (3) arranged in a matrix, which project out from the object to be protected. If a corresponding hollow-charge projectile hits such a protective layer (1), the front nose (101) thereof is damaged, so that in most cases the initiation of the hollow charge does not occur. Preferably the rods (3) are covered externally by polymer layers (9, 10) and additionally a crumple layer (8) is attached in front of the object to be protected.

## Claims

### Claim 1

A protective layer for protection of an object against a warhead fired from a firing direction toward the object, the warhead comprising an active projectile having a tip and a selected calibre according to the warhead in a range from 40 mm to 105 mm, the protective layer comprising metallic rods arranged in a matrix and projecting from the object to be protected, each rod having an end region remote from the object to be protected with an at least partially galvanically conductive surface, wherein the rods project beyond an upper inner surface of the protective layer, wherein a diagonal distance between the rods is less than the calibre of the projectile and greater than the tip of the projectile, and wherein the rods are mounted and directed approximately into the firing direction.

### Claim 2 (depends on 1)

The protective layer according to claim 1, further comprising at least first and second tiltable carriers, wherein a first set of the rods is arranged in rows on the first tiltable carrier and a second set of the rods is arranged in rows on the second tiltable carrier in an operative connection with the first tiltable carrier.

### Claim 3 (depends on 1)

The protective layer according to claim 1, wherein the rods project out of a solid plate.

### Claim 4 (depends on 1)

The protective layer according to claim 1, wherein the rods project out of nodes of a steel net.

### Claim 5 (depends on 1)

The protective layer according to claim 1, wherein the plate is mounted in front of a crumple layer absorbing part of kinetic energy resulting from impact of the projectile.

### Claim 6 (depends on 5)

The protective layer according to claim 5, wherein the crumple layer is a corrugated perforated plate made of steel sheet.

### Claim 7 (depends on 5)

The protective layer according to claim 5, wherein the crumple layer is a multilayer composite plate.

### Claim 8 (depends on 5)

The protective layer according to claim 5, further comprising at least one layer comprising a metallic sponge.