초록 ▼

An explosive device contains a water-reactive material that ignites upon exposure to water. The water-reactive material ignites a water-activated fuse that has a predetermined burn rate and length. The predetermined burn rate and length allows the device to sink to a desired depth before exploding.

An explosive device contains a water-reactive material that ignites upon exposure to water. The water-reactive material ignites a water-activated fuse that has a predetermined burn rate and length. The predetermined burn rate and length allows the device to sink to a desired depth before exploding. Hence, the device explodes after a desired period of time and/or at a desired depth. Defense against underwater swimmers is an advantageous feature of embodiments of the disclosure. The device can use a forty millimeter (40 mm) form factor, which permits launch of the device from convention grenade launchers.

대표청구항 ▼

1. A method, comprising: forming, in a shell of an explosive device having a chamber, an opening extending from the chamber through the shell, the shell housing a high explosive;inserting a water-reactive material within the chamber of the shell;providing a water-activated fuse train having a burn r

1. A method, comprising: forming, in a shell of an explosive device having a chamber, an opening extending from the chamber through the shell, the shell housing a high explosive;inserting a water-reactive material within the chamber of the shell;providing a water-activated fuse train having a burn rate which is a function of a sink rate of the explosive device and an intended depth of detonation, the water-activated fuse train having a first end and a second end, the first end and the second end being separated by a length of the water-activated fuse train;placing a detonation charge within the shell in proximity to the high explosive and coupling the charge to the second end of the water-activated fuse train; andcoupling the water-reactive material with the water-activated fuse train, the water-reactive material to ignite the water-activated fuse train when exposed to water and the water-activated fuse train to burn down to the detonation charge which is separate from the chamber. 2. The method of claim 1, wherein the water-reactive material is one of sodium, strontium metal, lithium metal, phosphorous pentachloride, and potassium hydroxide. 3. The method of claim 1, wherein the detonation charge is configured to detonate the high explosive within the shell. 4. The method of claim 1, wherein the water-activated fuse train is disposed between the water-reactive material and the high explosive. 5. The method of claim 4, wherein the length corresponds to the intended depth of detonation at which the high explosive will detonate when the water-activated fuse train burns down to the detonation charge. 6. The method of claim 1, wherein the high explosive is one of Trinitrotoluene (TNT), Composition B, Pentaerythritol tetranitrate (PETN), octogen (HMX), and nitrocellulose. 7. The method of claim 1, wherein the shell has a forty millimeter (40 mm) grenade form factor. 8. The method of claim 1, wherein the forming of the opening includes forming a continuous opening extending from within the chamber to outside of the shell. 9. The method of claim 1, further comprising inserting a primer and a propelling charge in an end of the shell. 10. The method of claim 1, further comprising protecting the shell with a covering, the covering being at least one of removable and water soluble. 11. The method of claim 1, wherein the explosive device to produce concussive effects at the intended depth which would cause injury to a hostile underwater swimmer near a vessel without hazard to the vessel. 12. A method, comprising: forming an opening through a shell of an explosive device and a chamber within the shell;inserting a water-reactive material within the chamber of the shell;placing a detonation charge proximate a high-explosive in the shell, the detonation charge being separate from the chamber, andcoupling the water-reactive material and the detonation charge with a water-activated fuse train, the water-activated fuse train having a burn rate which is a function of a sink rate of the explosive device and an intended depth of detonation of the detonation charge explosive to produce concussive effects by an explosion of the explosive device at the intended depth to cause injury to a hostile underwater swimmer near a vessel without hazard to the vessel. 13. The method of claim 12, further comprising inserting a primer and a propelling charge in an end of the shell. 14. The method of claim 12, further comprising protecting the shell with a covering, the covering being at least one of removable and water soluble. 15. The method of claim 12, wherein the high explosive is one of Trinitrotoluene (TNT), Composition B, Pentaerythritol tetranitrate (PETN), octogen (HMX), and nitrocellulose. 16. The method of claim 12, wherein the water-reactive material is one of sodium, strontium metal, lithium metal, phosphorous pentachloride, and potassium hydroxide. 17. The method of claim 12, wherein the shell has a forty millimeter (40 mm) grenade form factor. 18. The method of claim 12, wherein the water-activated fuse train having a first end and a second end, the first end and the second end being separated by a length of the water-activated fuse train, the length corresponds to the intended depth of detonation at which the high explosive will detonate when the water-activated fuse train burns down to the detonation charge. 19. The method of claim 18, wherein the water-activated fuse train is disposed between the water-reactive material and the high explosive. 20. A method, comprising: forming, in an outer casing of an explosive device having a fuse ignition chamber, a port to allow ingress of water from outside of the outer casing to within the fuse ignition chamber, the explosive device configured to be launched from a small arms launch device;placing a detonation charge proximate a high-explosive in the outer casing;providing a water-activated fuse train having a first end and a second end being separated by a length of the water-activated fuse train to ignite the detonator charge, the water-activated fuse train having a burn rate which is a function of a sink rate of the device and an intended depth of detonation of the detonator charge which is separate from the fuse ignition chamber;inserting a water-reactive material within the fuse ignition chamber; andconnecting the water-reactive material to the first end of the water-activated fuse train, the water-reactive material to ignite the water-activated fuse train when exposed to water wherein the water-activated fuse train to burn down to the detonator charge.