DE2712458A1 - Rifle barrel cooling system - has envelope on barrel with external channels connected to flash damper - Google Patents

Abstract

The cooled barrel for a rifle has central rifled bore and four longitudinal cooling external grooves enveloping the shrunk tube. The cooling grooves are equally spaced and cooling air is drawn into the barrel through a cartridge chamber and propellant residues burned. After machining of the barrel with its cartridge chamber, external longitudinal grooves are milled into the barrel. These grooves reach up to the start of the cartridge chamber. The cooling envelope tube is subsequently shrunk on the barrel. This shrunk envelope accommodates a clamping ring and the brackets for the foresight and the loading tube and the housing holders. The flash damper has four sloping bores cooling channels, and a central bore which expands forward.

Description

Self-cooling tube for rifle ###

Manufacture of the self-cooling pipe: Main parts: 1. Pipe (Laui) 2. Cooling jacket pipe 3. Fire damper 4. Retaining ring for 1) A cartridge chamber is inserted into a barrel blank, cal. 7.62 mm attached with 12 relief grooves for the Nato cartridge 7.62 x 51. After completion its external dimensions are from front to back to the beginning of the chamber 4 grooves milled on the outside at a 90 angle to each other.

Regarding 2) Next, the cooling jacket tube is shrunk onto the barrel. The cooling jacket pipe now receives the processing for receiving the retaining ring, the Front sight and loading tube holder as well as housing holder and the 4 holes for the cooling channels.

Finally, the cooling fins are attached.

to 3) In the fire damper 4 diagonally to the middle are placed from the rear Bores (cooling channels) drilled. Then through the middle of the fire damper an 8 mm # hole is attached, which widens conically at the front. The fire suppression and rifle grenade holder is G 3 - customary. Finally, the Cooling fins and the retaining ring holder are closed.

Regarding 4) The retaining ring is made of spring steel and is held in place with a clamp Fire damper and cooling jacket pipe together and secure them against twisting at the same time.

Mode of operation: Self-cooling pipe for Gew@nr.# # Enlarge the cooling fins the surface and thereby better release the heat into the air. Is now in the chamber If a cartridge is ignited, the projectile pushes the air in the barrel in front of it. These strongly compressed air sucks the cold air through the cooling ducts in the fire damper after. The highly compressed powder gases also have the same effect.

Self-cooling pipe and fire damper together allow through the cold air intake system better cooling of the tube (barrel).

Since the cooling channels on the cartridge chamber now suck in the cold air, will the chamber immediately cooled. The cold air washes around from the cartridge chamber to the Flash hider in the 4 cooling channels the barrel. There is now the air in the fire damper mixed with the powder gases and burning powder residues can be reached at the Much faster combustion of the powder residues (shorter flash of light).

The self-cooling pipe allows the "theoretical rate of fire" to convert it into a "practical rate of fire".

Claims (1)

Self-feeler for gas No. # # Patent claim As patentable is supposed to under protection: the self-cooling tube, consisting of a tube (barrel) with the 4 Cooling grooves and the overlying cooling jacket pipe, plus the fire damper with its own 4 cooling duct bores. Self-cooling pipe and fire damper together Erlenben through the cold air intake system a better carbonization of the barrel (barrel). The fire damper mixes the powder residue with the cold air and this causes a higher incineration of the remaining powder residues. This results in A lower muzzle flash leads to lower smoke development.