Device and method for obtaining a horizontal dispersion pattern

Patent metadata

Field	Value
Publication number	US-11725918-B2
Application number	US-201816759762-A
Country	US
Kind code	B2
Filing date	Sep 26, 2018
Priority date	Nov 28, 2017
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A payload container for providing a horizontal dispersion pattern of sub-projectiles suitable for combatting surface targets is in the form of a cylinder and includes at least two sub-projectiles arranged in a core enclosed by a container wall, wherein the sub-projectiles are linearly disposed. In addition, a projectile and use of the same include at least one payload container or a plurality of sequentially arranged payload containers displaced by a displacement angle relative to each other. The displacement angle is predetermined in such way so that the sub-projectiles are vertically lined at the time when the mechanical force from the carrier shell disappears and the sub-projectiles are spread to the left and to the right, providing a horizontal dispersion pattern.

First claim

The invention claimed is:

1. A cylindrical payload container for a spin stabilized projectile, comprising
at least two sub-projectiles,
a core in which the sub-projectiles are disposed,
the sub-projectiles being releasably retained in the core and being linearly disposed along a straight line segment when viewed along a longitudinal axis of the container, and
the sub-projectiles being configured to be released from the core due to spinning of the container to form a horizontal dispersion pattern.

2. The payload container according to claim 1 , comprising at least two parallel lines of sub-projectiles.

3. The payload container according to claim 1 , comprising at least two layers of sub-projectiles arranged in substantially one plane.

4. The payload container according to claim 1 , wherein the sub-projectiles are flechettes, rods, spheres, discs, cubes or hexagons.

5. The payload container according to claim 1 , wherein the sub-projectiles are made of tungsten or tungsten carbide.

6. The payload container according to claim 1 , arranged to at least one more payload container thereby forming a stack of containers, wherein the first payload container is angularly displaced to the second payload container.

7. The payload container arranged to at least one more payload container according to claim 6 , wherein each payload container defines an angle of 0-180 degrees to the next payload container.

8. The payload container according to claim 1 , wherein the payload container is arranged to at least a second payload container in a payload chamber, thereby forming a stack of containers, wherein the first payload container is angularly displaced to the second payload container by a displacement angle φ (°) that is calculated by the formula:

φ
=

ω
projectile

·

L

payload
⁢

container

v
separation

·

180
⁢
°

π

wherein
ω is the angular velocity (rad/s) of the projectile;
v is the velocity (m/s) of the payload container in relation to the projectile;
L is the length (m) of the payload chamber; and
t is the time (s) it takes for the payload container to leave the projectile.

Assignees

• Bae Systems Bofors Ab

Inventors

• Thuman Christer

Classifications

• F42B12/58 Primary

  Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles (F42B12/32 takes precedence) · CPC title

• F42B12/60 Primary

  the submissiles being ejected radially · CPC title

• F42B10/26

  using spin (F42B10/04, F42B10/12, F42B10/14, F42B10/24, F42B14/02 take precedence) · CPC title

• F42B14/02

  Driving bands; Rotating bands (F42B14/04 takes precedence) · CPC title