Initiator for rocket motor

Patent metadata

Field	Value
Publication number	US-10634467-B2
Application number	US-201715712862-A
Country	US
Kind code	B2
Filing date	Sep 22, 2017
Priority date	Apr 13, 2017
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

Provided is an initiator for a rocket motor. The initiator for a rocket motor includes: a sleeve assembly configured to form a hollow portion; and an ignition assembly including a plug portion mounted on the sleeve assembly to close one side of the hollow portion and configured to deliver an electrical signal and a foil ignition portion coupled to the inside of the plug portion to be adjacent to the hollow portion. The sleeve assembly includes: a first gunpowder accommodated in the hollow portion to be adjacent to the foil ignition portion and detonated by the foil ignition portion; and a second gunpowder accommodated inside the hollow portion to contact the first gunpowder and deflagrated or combusted by the detonation of the first gunpowder.

First claim

What is claimed is:

1. An initiator for a rocket motor comprising:
a sleeve assembly including a hollow portion; and
an ignition assembly including a plug portion and a foil ignition portion,
wherein the plug portion is mounted on the sleeve assembly to close one side of the hollow portion and is configured to deliver an electrical signal to the ignition portion,
wherein the foil ignition portion is coupled to inside of the plug portion and is disposed adjacent to the hollow portion,
wherein the sleeve assembly comprises:
a first explosive charge accommodated in the hollow portion and disposed adjacent to the foil ignition portion and configured to be detonated by the foil ignition portion; and
a second explosive charge accommodated inside the hollow portion to contact the first explosive charge and configured to be deflagrated or combusted by the detonation of the first explosive charge,
wherein the plug portion comprises:
a body portion inserted in the sleeve assembly;
a plurality of pins extending into the body portion; and
a sealing member interposed between the body portion and each of the plurality of pins to surround an outer circumferential surface of each of the plurality of pins,
wherein the plurality of pins include accommodating grooves which are recessed at the outer circumferential surface of each of the plurality of pins, and
wherein the seating member includes a protrusion portion which protrudes into the accommodating grooves,
wherein each of the plurality of pins comprise an inner end facing the hollow portion, and wherein the inner end of the pin is formed as a plane cut surface configured to be adhered to a surface of the foil ignition portion,
wherein the foil ignition portion comprises:
an ignition layer including a bridge configured to be vaporized by applying a voltage thereto;
an insulating layer disposed on one side of the ignition layer and including a plurality of pin accommodating holes; and
a spacing layer disposed on the other side of the ignition layer and including a through hole formed to expose the bridge to the first explosive charge, and
wherein the first explosive is accommodated in a first hollow having a small inner diameter and a cylindrical space adjacent to the foil ignition portion in the hollow portion, and
the second explosive is filled in a second hollow which is a cylindrical space with a larger inner diameter than the first hollow and adjacent to the first hollow in the hollow portion.

2. The initiator of claim 1 , wherein an outer end of each of the plurality of pins is convex.

3. The initiator of claim 1 , wherein the accommodating grooves surround the outer circumferential surface of each of the plurality of pins, and the protrusion portion is annular to be accommodated in the accommodating grooves.

Assignees

• Kim Dongseong
• Jang Seunggyo
• Lee Moonho
• Agency Defense Dev

Inventors

• Kim Dongseong
• Jang Seunggyo
• Lee Moonho

Classifications

• F42B3/124 Primary

  characterised by the configuration or material of the bridge (F42B3/13 takes precedence) · CPC title

• F42B3/14

  Spark initiators {(F42B3/195 takes precedence)} · CPC title

• F02K9/95 Primary

  characterised by starting or ignition means or arrangements (safety devices F02K9/38) · CPC title