# US 9,435,619 B1 · Propulsion assembly for a dart-based electrical discharge weapon

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- Number: US 9,435,619 B1
- Document ID: US9435619B1
- Status: Granted
- Kind: B1
- Application number: 13/680,422
- Filed: 2012-11-19
- Granted: 2016-09-06
- Earliest claimed: 2012-11-19
- Applicants: Yong S. Park
- Inventors: Yong S. Park
- Web page: https://patentgrep.com/patent/US9435619B1

## CPC

- F41B 11/62: with pressure supplied by a gas cartridge
- F41H 13/0025: {for remote electrical discharge via conducting wires, e.g. via wire-tethered electrodes shot at a target}
- F41B: WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR (projectiles for fishing, e.g. fish-spears, A01K81/00; sports implements for throwing A63B65/00, e.g. boomerangs A63B65/08; stationary apparatus for projecting sports balls, e.g. tennis balls, A63B69/40; throwing or slinging toys A63H33/18; knives, axes B26B; projectiles or missiles other than those incorporating springs as projecting means F42B6/00)
- F41H: ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL

## Abstract

An assembly for use in propelling electrode darts toward a distant target is deployed in an electrical discharge weapon. The assembly comprises a cartridge having a u-shaped channel terminating in apertures through which wire-tethered darts are propelled. Propulsion is achieved relatively efficiently using the sudden release of compressed gas from a sealed storage tank in response to penetration by a conical penetrator forced by an electrically-induced ignition of a pyrotechnic material to accelerate toward and penetrate the tank at an axial surface. The conical shape of the penetrator and the axial penetration of the tank produces a precisely symmetric rush of gas into a relatively confined volume including the dart channel to propel the darts toward the target in an efficient manner. Paper stickers may cover the dart exit apertures to permit initial pressure buildup before the darts penetrate the stickers as they are propelled toward the target.

## Claims

### Claim 1

In a cartridge holding a pair of wire-tethered dart electrodes for propulsion toward a remote target for applying an electric discharge on the target, a propulsion assembly comprising:
a sealed tank of compressed gas positioned symmetrically between opposing sides of a channel holding said dart electrodes;
a penetration assembly having a conical penetrator positioned in substantial juxtaposition with an axial end of said tank;
said penetrator having a chamber receiving a charge of pyrotechnic material within a housing affixed to a wall of said channel;
an electrical voltage selectively applied to said charge for igniting said charge and propelling said penetrator into said tank for releasing said compressed gas into said channel for propelling said dart electrodes.

### Claim 2 (depends on 1)

The propulsion assembly recited in claim 1 wherein said conical penetrator is positioned at the center of said axial end of said tank for directing substantially equal gas pressure at each said dart electrode.

### Claim 3 (depends on 1)

The propulsion assembly recited in claim 1 wherein said released compressed gas in confined substantially to said channel for efficient propulsion of said dart electrodes.

### Claim 4 (depends on 1)

The propulsion assembly recited in claim 1 wherein said released compressed gas is substantially distributed in said channel by said conical penetrator.

### Claim 5 (depends on 1)

The propulsion assembly recited in claim 1 wherein said released compressed gas is substantially equally distributed within said channel toward each of said pair of dart electrodes.

### Claim 6 (depends on 1)

The propulsion assembly recited in claim 1 wherein said housing of said penetrator assembly substantially seals said channel to resist pressure loss outside said channel upon release of said compressed gas.