# US 4,395,952 A · Underwater weapon systems

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

- Number: US 4,395,952 A
- Document ID: US4395952A
- Status: Granted
- Kind: A
- Application number: 06/213,071
- Filed: 1980-12-04
- Granted: 1983-08-02
- Earliest claimed: 1980-12-04
- Inventors: Christopher D. D. Hickey
- Web page: https://patentgrep.com/patent/US4395952A

## CPC

- F41F 3/10: from below the surface of the water
- F42B 22/00: Marine mines, e.g. launched by surface vessels or submarines (F42B12/00 takes precedence; for practice or training F42B8/28; mine laying or sweeping B63G)
- F41F: APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS (smallarms F41C); LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS (functional features or details common to both smallarms and ordnance, mountings therefor F41A; projecting missiles without use of explosive or combustible propellant charge F41B)
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)

## Abstract

An underwater weapon system comprises a container for a self-propelled weapon with target homing means, the container including pumps having inlets on the underside of the container to pump silt, gravel etc, from underneath the container whereby the container can be buried or partially buried in the sea bed. Reverse operation of the pumps raises the container which is opened automatically, e.g. with a radio control system, to release the weapon when the weapon is to be used.

## Claims

### Claim 1

An underwater weapon system comprising a self-propelled weapon with target homing means, a watertight container for the weapon, pump means having at least one inlet on the underside of the container and at least one outlet above the underside, whereby sand or silt under the container may be pumped away to cause the container to become buried in said or silt on the sea-bed, the pump means being operatively reversible to pump sand or silt underneath the container for raising the container.

### Claim 2 (depends on 1)

A weapon system as claimed in claim 1 wherein the weapon is a torpedo.

### Claim 3 (depends on 1)

A weapon system as claimed in claim 1 wherein the weapon is a ballistic missile.

### Claim 4 (depends on 1)

A weapon system as claimed in claim 1 and having a target detection sensor within the container arranged to initiate launching of the weapon.

### Claim 5 (depends on 1)

A weapon system as claimed in claim 1 wherein the container is watertight and pressure-tight.

### Claim 6 (depends on 1)

A weapon system as claimed in claim 1 wherein at least the part of the container housing the weapon is watertight and pressure-tight.

### Claim 7

An underwater weapon system comprising a self-propelled weapon with target homing means, and a container for said weapon, said container including pump means arranged for displacing sand or silt on the underside of the container whereby the container sinks into the sea bed, said container having control means for operating said pump means and further control means operative to open the container to permit release of the weapon and wherein means are provided to stop the pump means when the container is buried to a predetermined depth.

### Claim 8 (depends on 7)

A weapon system as claimed in claim 7 wherein said control means for operating said pump means are arranged in response to a command signal to operate the pump means to raise the container to a position for weapon release.

### Claim 9 (depends on 7)

A weapon system as claimed in claim 7 wherein means responsive to an external command signal are provided for activation of said further control means to open the continer for release of the weapon system.

### Claim 10 (depends on 9)

A weapon system as claimed in claim 9 and having a receiver for receiving an acoustic or electromagnetic command signal.

### Claim 11 (depends on 10)

A weapon system as claimed in claim 10 and having a retractable receiving sensor for receiving said command signal.