Impact part of a projectile

• US 20070028792A1
• Filed: 05/05/2006
• Published: 02/08/2007
• Est. Priority Date: 11/03/2004
• Status: Active Grant

• Current Assignee: Saab Bofors Dynamics Switzerland Ltd. (Saab AB)
• Original Assignee: Saab Bofors Dynamics Switzerland Ltd. (Saab AB)
• Inventors: Bissig, Josef
• Granted Patent: US 7,273,010 B2
• Time in Patent Office: Days
• US Class Current: 102/472
• CPC Class Codes: F42B 10/46 Streamlined nose cones; Windshields; Radomes F42B12/105 takes precedence
• CPC Class Codes: F42B 12/105 Protruding target distance or stand-off members therefor, e.g. slidably mounted fuze aspects F42C1/14
• CPC Class Codes: F42C 1/14 operating at a predetermined distance from ground or target by means of a protruding member
• CPC Class Codes: F42C 19/07 Nose-contacts for projectiles or missiles

Abstract

An impact part on a projectile permits the activation of detonation systems within a large angular range of contact with a target. The impact part is provided with annular recesses with embedded circular rings that engage with the target and prevent the projectile from rebounding. A thin-walled, dome-shaped tip prevents relatively large disruptive effects upon the projectile'"'"'s hollow charge. As a result of dimensioning the impact part in accordance with the rules of fracture mechanics, it is possible to achieve a desired fragmentation on the target.

Claims

1. An impact part of a projectile which contains at least one active charge and one detonation device activated upon impact, the impact part being constructed in the form of a bossed cap having a tip and lateral walls with a cavity bounded thereby, characterized in that the tip is thin-walled relative to the lateral walls, at least two annular grooves concentric to a flight direction F are let into the lateral walls, the annular grooves having have sharp edges, the annular grooves each having an elastomer embedded therein to fill and/or project beyond the annular grooves.

2. An impact part according to claim 1, characterized in that the embedded elastomers are in the form of annular seals.

3. An impact part according to claim 2, characterized in that the annular seals are O-rings of silicone rubber.

4. An impact part according to claim 1, characterized in that the internal shape of the impact part has in internal shape with a profile which displays discontinuities.

5. An impact part according to claim 1, 2 or 3, characterized in that the impact part has an external thread, the thread and an external shape of the impact part being adapted to a contour of a head of the projectile.

6. An impact part according to claim 1, characterized in that an external shape of the impact part and the grooves are selected to be such that a line of contact with a target forms an angle α

of from 15°

to 90°

to the flight direction F.

7. An impact part according to claim 1, characterized in that the tip is dome-shaped and has a wall thickness and material selected such that the tip shatters at least in part upon impact with a hard target at an angle of from 800 to 900.

8. An impact part according to claim 7, characterized in that the tip has a periphery with notches and/or portions of removed material.

9. An impact part according to claim 8 or 9, characterized in that it comprises an untempered heat-treatable steel.