Pyrotechnic object

Patent metadata

Field	Value
Publication number	US-12196536-B2
Application number	US-202318142651-A
Country	US
Kind code	B2
Filing date	May 3, 2023
Priority date	Nov 5, 2020
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

The present disclosure relates to a pyrotechnic object, in particular an irritation body, irritation projectile or ammunition, comprising an ignition device, comprising a delay chamber extending along a delay path, in which chamber a delay charge is accommodated, and comprising at least one and preferably a plurality of effect chambers in which or in each of which an effect charge to be ignited is accommodated, wherein the delay chamber is transversely connected to a respective effect chamber via a respective over-ignition opening which branches off from the delay chamber and forms an over-ignition path, wherein in the case of a plurality of effect chambers the plurality of over-ignition openings are arranged successively downstream along the delay path in the order of the effect charges to be ignited.

First claim

What is claimed is:

1. A pyrotechnic object comprising:
an ignition device;
a delay chamber for housing a delay charge, the delay chamber extending from the ignition device along a delay path; and
at least one effect chamber accommodating an effect charge to be ignited, the delay chamber transversely connected to the effect chamber via an over-ignition opening which branches off from the delay chamber and forms an over-ignition path between the delay chamber and the effect chamber,
wherein an over-ignition charge that differs and chemically deviates from the effect charge is introduced into the over-ignition opening to at least partially close the over-ignition opening after combustion of the over-ignition charge and by combustion residue of the over-ignition charge, and to reduce or dampen a propagation of a pressure shock which is produced as a result of an ignition of the effect charge in the effect chamber and acts on the delay chamber via the over-ignition opening.

2. The pyrotechnic object according to claim 1 , wherein the over-ignition charge is introduced into the over-ignition opening over at least 20%, of the length of the over-ignition path.

3. The pyrotechnic object according to claim 1 , wherein the over-ignition charge is pressed into the over-ignition opening.

4. The pyrotechnic object according to claim 1 , wherein the over-ignition charge is introduced into the over-ignition opening as a pasty medium or a flowable medium and is cured therein.

5. The pyrotechnic object according to claim 1 , wherein the over-ignition opening has a cross-sectional change along the over-ignition path.

6. The pyrotechnic object according to claim 5 , wherein the cross-sectional change of the over-ignition opening is a cross-sectional area that changes along the over-ignition path by at least 10%.

7. The pyrotechnic object according to claim 5 , wherein the cross-sectional change is oriented such that the over-ignition opening has, in an ignition propagation direction towards the effect chamber, an increasing cross-sectional area.

8. The pyrotechnic object according to claim 5 , wherein the cross-sectional change is conical-shaped or funnel-shaped.

9. The pyrotechnic object according to claim 5 , wherein the over-ignition opening is a stepped opening.

10. The pyrotechnic object according to claim 5 , wherein the over-ignition charge is arranged in a region of the cross-sectional change such that immobilization and anchorage of the combustion residue of the over-ignition charge in the over-ignition opening is assisted by the cross-sectional change.

11. The pyrotechnic object according to claim 5 , wherein the cross-sectional change of the over-ignition opening is a cross-sectional area that changes along the over-ignition path by at least 25%.

12. The pyrotechnic object according to claim 5 , wherein the cross-sectional change of the over-ignition opening is a cross-sectional area that changes along the over-ignition path by at most 60%.

13. The pyrotechnic object according to claim 1 , further comprising a housing inner body defining the delay chamber and the effect chamber and an outer sleeve body surrounding the housing inner body, the outer sleeve body having a grippable outer side of the object.

14. The pyrotechnic object according to claim 13 , wherein the outer sleeve body is cylindrical.

15. The pyrotechnic object according to claim 13 , wherein the outer sleeve body is configured to seal one or more openings communicating with the delay chamber and the effect chamber.

16. The pyrotechnic object according to claim 1 , wherein:
the at least one effect chamber includes a plurality of effect chambers accommodating effect charges to be ignited;
the delay chamber is transversely connected to the plurality of effect chambers via a plurality of over-ignition openings including the over-ignition opening; and
the plurality of over-ignition openings are arranged successively downstream along the delay path in the order of the effect charges to be ignited.

17. The pyrotechnic object according to claim 1 , wherein the over-ignition charge is introduced into the over-ignition opening over at least 30% of the length of the over-ignition path.

18. The pyrotechnic object according to claim 17 , wherein the over-ignition charge is introduced into the over-ignition opening over at most 90% of the length of the over-ignition path.

19. The pyrotechnic object according to claim 1 , wherein the over-ignition charge is introduced into the over-ignition opening over at least 50% of the length of the over-ignition path.

20. The pyrotechnic object according to claim 1 , wherein the pyrotechnic object is one of an irritation body, irritation projectile or ammunition.

Assignees

• Rheinmetall Waffe Munition Gmbh

Inventors

• Wustlich Martin
• Habel Frank
• Lübbers Kai
• Schulz Ernest
• Cegiel Dirk
• Fischer Robert

Classifications

• F42B5/16

  characterised by composition or physical dimensions or form of propellant charge, {with or without projectile,} or powder (chemical composition C06B; {F42B5/24 takes precedence}) · CPC title

• F42B3/16 Primary

  {Pyrotechnic} delay initiators (F42B3/195 takes precedence; {programmable electronic delay initiators F42C11/065}) · CPC title

• F42B12/36

  for dispensing materials; for producing chemical or physical reaction; for signalling {; for transmitting information} · CPC title

• F42C9/10 Primary

  the timing being caused by combustion {(F42C9/14 takes precedence)} · CPC title