Patent ID: 7870815
Filing Date: 2011-01-18
Classification: F41A

Abstract:
1. A gun flash hider, for joining to a gun barrel or cannon barrel to reduce sonic boom volume, the amount of flame and recoil force when firing a bullet, comprising: a first expansion chamber formed at one end of the gun flash hider, a threaded portion being formed at an open end of the first expansion chamber, thereby enabling first expansion decompression of gas derived from the gun barrel or cannon barrel; a first flow divider formed at a closed end of the first expansion chamber, a through hole being formed at a center of the first flow divider, thereby enabling first flow diversion decompression of the gas located within the first expansion chamber; a plurality of first exhaust passages annularly formed on an outer side of the first flow divider, parallel to a longitudinal axis of said gun flash hider, providing flow passage portions for gas after undergoing first flow diversion decompression; an exhaust head formed at another end of the gun flash hider, a through hole being formed at a center of the exhaust head, and the plurality of first exhaust passages afford passage to the exhaust head, each passage connecting to a separate opening in the exhaust head, the openings annularly surrounding said through hole, thereby enabling discharge of the gas to the atmosphere after undergoing first flow diversion decompression; a second expansion chamber formed at one side of the first flow divider relative to the first expansion chamber, thereby enabling second expansion decompression of the gas after undergoing first flow diversion decompression; a plurality of second exhaust passages annularly formed on the second expansion chamber, each passage connecting to a separate opening in a sidewall of the exhaust head, thereby enabling discharge of the gas to the atmosphere after undergoing second expansion decompression; and a second flow divider formed at one end of the second expansion chamber, a through hole being formed at a center of the second flow divider, and the through hole affords passage to the exhaust head, thereby enabling second flow diversion decompression of gas located within the second expansion chamber.