# US 5,331,897 A · Ship decoy

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

- Number: US 5,331,897 A
- Document ID: US5331897A
- Status: Granted
- Kind: A
- Application number: 05/842,633
- Filed: 1977-10-07
- Granted: 1994-07-26
- Earliest claimed: 1975-08-07
- Assignees: The United States of America as represented by the Secretary of the Navy
- Inventors: George S. Handler
- Web page: https://patentgrep.com/patent/US5331897A

## CPC

- F42B 12/50: by dispersion
- F41H 9/00: Equipment for attack or defence by spreading flame, gas or smoke {or leurres}; Chemical warfare equipment (protection against chemicals A62B)
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)
- F41H: ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL

## Abstract

A decoy device for deployment in a marine environment to decoy heat seeking issiles from their intended target. The device consists of a canister of fuel and means for igniting the fuel. The canister is designed such that the operation of the device creates a spray of burning fuel and a resultant large radiation area decoy.

## Claims

### Claim 1

A decoy device adapted for attachment to a delivery device for the protection of ships from enemy infra-red homing missiles comprising:
a canister adapted to be delivered to a desired location from a ship;
said canister having means on one end for attachment to the delivery device and a sealed nose closure at the other end;
an initiating device in said canister;
a gas source associated with said initiating device adapted to be initiated thereby;
a fuel chamber in said canister;
a fuel contained in said fuel chamber;
said fuel being a low-cost hydrocarbon;
an inner canister within said fuel chamber having a forward open end and an aft closed end and forming with said first named canister an annular passageway substantially coextensive with said fuel chamber; and
means communicating between said gas source and said fuel chamber near the closed end of said inner canister;
whereby, when gases are produced by said gas source and disseminated through said communicating means, pressurization of said fuel chamber will be accomplished and fuel will be forced outwardly between said inner canister and said first named canister in a desired pattern.

### Claim 2

A decoy device adapted for attachment to a delivery device for the protection of ships from enemy infra-red homing missiles comprising;
a canister adapted to be delivered to a desired location from a ship;
said canister having means on one end for attachment to the delivery device and a sealed nose closure at the other end;
an initiating device in said canister;
a gas source associated with said initiating device adapted to be intitiated thereby;
a fuel chamber in said canister;
a fuel contained in said fuel chamber;
an inner canister within said fuel chamber having a forward open end and an aft closed end and forming with said first named canister an annular passageway substantially coextensive with said fuel chamber; and
means communicating between said gas source and said fuel chamber near the closed end of said inner canister;
said closed end of said inner canister being pierced by a plurality of peripherally spaced ignition apertures;
whereby, when gases are produced by said gas source and disseminated through said communicating means, pressurization of said fuel chamber will be accomplished and fuel will be forced outwardly between said inner canister in a desired pattern.

### Claim 3

A decoy device adapted for attachment to a delivery device for the protection of ships from enemy infra-red homing missiles comprising;
a canister adapted to be delivered to a desired location from a ship;
said canister having means on one end for attachment to the delivery device and a sealed nose closure at the other end;
an initiating device in said canister;
a gas source associated with said initiating device adapted to be initiated thereby;
a fuel chamber in said canister;
an inner canister within said fuel chamber having a forward open end and an aft closed end and forming with said first named canister an annular passageway substantially coextensive with said fuel chamber;
communicating means between said gas source and said fuel chamber near the closed end of said inner canister;
a piston-like member fitted within said inner canister and having a central opening conforming to said communicating means so that a void chamber is defined between said piston-like member and the closed end of said inner canister;
whereby, when gases are produced by said gas source and disseminated through said communicating means, pressurization of said fuel chamber will be accomplished and fuel will be forced outwardly between said inner canister and said first named canister in a desired pattern.

### Claim 4

A decoy device adapted for attachment to a delivery device for the protection of ships from enemy infra-red homing missiles comprising;
a canister adapted to be delivered to a desired location from a ship;
said canister having means on one end for attachment to the delivery device and a sealed nose closure at the other end;
rupturable closure means covering the end of said canister adapted for attachment to the delivery device;
fuel ejection nozzles spaced peripherally about the inner circumference of said canister;
an initiating device in said canister;
a gas source associated with said initiating device adapted to be initiated thereby;
a fuel chamber in said canister;
a fuel contained in said fuel chamber;
an inner canister within said fuel chamber having a forward open end and an aft closed end and forming with said first named canister an annular passageway substantially coextensive with said fuel chamber; and
means communicating between said gas source and said fuel chamber near the closed end of said inner canister;
whereby, when gases are produced by said gas source and disseminated through said communicating means, pressurization of said fuel chamber will be accomplished and fuel will be forced outwardly between said inner canister and said first named canister in a desired pattern.

### Claim 5 (depends on 4)

A decoy device as set forth in claim 4 wherein;
said rupturable closure means initially covers said fuel ejection nozzles and is ruptured when pressurization of said fuel chamber is accomplished.

### Claim 6 (depends on 4)

A decoy device as set forth in claim 4 wherein; said fuel is a low-cost hydrocarbon.

### Claim 7 (depends on 4)

A decoy device as set forth in claim 4 wherein;
said fuel is a pyrophoric fuel such that it is ignitable on contact with the atmosphere.