# US 2009/0260533 A1 · Fuse for a projectile

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2009/0260533 A1
- Document ID: US20090260533A1
- Status: Published application
- Kind: A1
- Application number: 12/391,772
- Filed: 2009-02-24
- Published: 2009-10-22
- Earliest claimed: 2008-02-26
- Assignees: Junghans Microtec GmbH
- Inventors: Markus Kopf; Frank Weisser; Frank Martin Kienzler
- Web page: https://patentgrep.com/patent/US20090260533A1

## CPC

- F42C 19/02: Fuze bodies; Fuze housings
- F42C 15/18: wherein a carrier for an element of the pyrotechnic or explosive train is moved (F42C15/40 takes precedence)
- F42C: AMMUNITION FUZES (blasting cartridge initiators F42B3/10; chemical aspects C06C); ARMING OR SAFETY MEANS THEREFOR (filling fuzes F42B33/02; fitting or extracting primers in or from fuzes F42B33/04; containers for fuzes F42B39/30)

## Abstract

A fuse for a projectile has a primary firing assembly and a secondary firing assembly. The secondary firing assembly, which is separated from the primary firing assembly by a barrier, has a firing relay with a relay explosive in a sleeve component and a firing booster. When using insensitive explosive for the secondary firing assembly, little energy should be lost in the relay from the primary to the secondary firing assembly, with enhanced safety against inadvertent firing in the secondary firing assembly. For that purpose, the sleeve component forms a gas-tight seal for the secondary firing assembly with respect to the primary firing assembly.

## Claims

### Claim 1

A fuse for a projectile, comprising:
a primary firing assembly;
a secondary firing assembly adjoining said primary firing assembly, said secondary firing assembly having a firing relay with a relay explosive disposed in a sleeve component, and having a firing booster;
said sleeve component forming a gas-tight seal of said secondary firing assembly with respect to said primary firing assembly and a barrier separating said secondary firing assembly from said primary firing assembly.

### Claim 2 (depends on 1)

The fuse according to claim 1, wherein said sleeve component forms a housing for booster explosive of said firing booster.

### Claim 3 (depends on 1)

The fuse according to claim 1, wherein said sleeve component forms at least a part of a hermetically sealed encapsulation of the relay explosive and of booster explosive for said firing booster.

### Claim 4 (depends on 1)

The fuse according to claim 1, wherein said sleeve component forms a housing for said primary firing assembly.

### Claim 5 (depends on 1)

The fuse according to claim 1, wherein said relay explosive has different firing characteristics than a booster explosive of said firing booster.

### Claim 6 (depends on 1)

The fuse according to claim 1, wherein said relay explosive is a different substance than a booster explosive of said firing booster.

### Claim 7 (depends on 1)

The fuse according to claim 1, wherein said firing booster has an insensitive booster explosive.

### Claim 8 (depends on 1)

The fuse according to claim 1, wherein said relay explosive is insensitive to a temperature of up to 200° C.

### Claim 9 (depends on 1)

The fuse according to claim 1, wherein said sleeve component forms an exclusive material barrier between said relay explosive and an armed detonator for said primary firing assembly.

### Claim 10 (depends on 1)

The fuse according to claim 1, which comprises a fuse housing, and wherein said sleeve component forms a load-bearing housing part of said fuse housing.

### Claim 11 (depends on 1)

The fuse according to claim 1, wherein said sleeve component is a supporting plate for supporting said primary firing assembly.

### Claim 12 (depends on 1)

The fuse according to claim 1, which comprises a fuse housing, and wherein said sleeve component forms a bottom screw of said fuse housing.

### Claim 13 (depends on 1)

The fuse according to claim 1, wherein said sleeve component forms a tab in a direction of said primary firing assembly.

### Claim 14 (depends on 13)

The fuse according to claim 13, wherein said tab engages in a recess formed in an assembly mount for said primary firing assembly.