Patent ID: 9395135
Filing Date: 2016-07-19
CPC Classification: F41A

Claim Text:
1. A barrel assembly for use in a firearm, the barrel assembly comprising a barrel with a rifled bore, and a chamber for receiving a cartridge therein, the chamber having a throat portion adjacent the rifled bore, the chamber also having a body portion for receiving the cartridge case therein, the cartridge comprising a cylindrical cartridge case, a bullet engaged within the cartridge case, and the cartridge case containing a propellant, the propellant producing a propellant pressure upon ignition of the propellant, the barrel assembly further comprising: the barrel comprising at least one supply port passing from the chamber throat to a propellant pressure interconnect passage, and at least one release port passing from the propellant pressure interconnect passage and into the chamber body, the supply port thereby in pressure interconnection with the release port via the propellant pressure interconnect passage; the barrel assembly comprising, a barrel sleeve, the barrel sleeve configured to receive the barrel within the barrel sleeve, and to positively engage the barrel to the barrel sleeve, wherein a recess is formed between the barrel and barrel sleeve, the recess comprising the propellant pressure interconnect passage; wherein the total cross-sectional area of the supply ports is within +/−25% of the total cross sectional area of the release ports; wherein upon ignition of the propellant, the bullet is forced by propellant pressure out of the cartridge case and into the rifled bore of the barrel, the propellant pressure passing into the at least one supply port, into the propellant pressure interconnect passage, and into the at least one release port, the propellant pressure then exerted upon the exterior of the cylindrical cartridge case; and wherein the static bond due to propellant pressure between the cartridge case and the barrel chamber is thereby reduced.