US 4,535,676 AGranted

Cooling arrangement for the gun barrels of firearms

AssigneeDiehl GmbH & Co.

InventorsAnton Politzer, Roland Bertiller

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Abstract

A cooling arrangement for the gun barrels of firearms, in particular automatic firearms and high-performance machine cannons. The arrangement includes radially outwardly directed cooling pasageways between the individual projectile chambers provided in the drum in the region of the end portion of the gun barrel axially adjoining the drum, and which are connected with a main passageway in the hollow-bored longitudinal barrel axis for the central cooling medium infeed. Connected to the nozzles of the radially directed passageways, which nozzles extend essentially in parallel with the longitudinal axis of the drum, closure members are interposed in the radial cooling passageways which automatically open and close in dependence upon the drum position and only during firing, whereby the outlet openings of the nozzles positioned in the axial end surface of the drum and, during rotation of the drum, will presently openly communicate for a short period of time with the associated end portion of the gun barrel.

Claims9

Dependent claims

In a cooling arrangement for the gun barrels of firearms, including a rotatable drum having a longitudinal axle at the rearward portion of the gun barrel provided with passageways in the drum which passageways are directed radially outwardly intermediate individual projectile chambers which passageways are joined in the region of the end portion of the gun barrel axially adjoining the drum, a main passageway for a central cooling medium infeed located in a hollow bore along the longitudinal axle of said drum, said radial passageways being connected to said main passageway;

the improvement comprising:
cooling medium flow nozzles extending in predetermined angular relationship with the longitudinal axis of the drum and connecting with the radially directed cooling passageways;
closure members in said radial passageways automatically opening and closing only during the firing of said firearm and in dependence upon the rotational drum position, said nozzles having outlet openings located in the axial end surface of the drum facing towards the gun barrel and openly communication for a predetermined time interval with the associated end portion of the gun barrel.

Dependencies are inferred from the claim text.