Gas bleed arrangement and barrel and/or firearm with a gas...

F - Mech Eng,Light,Heat,Weapons – 41 – A

Patent

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F41A 5/28 (2006.01)

Patent

CA 2632150

A gas bleed arrangement (3) for a firearm barrel (10) the bore (7) of which is in communication with a gas cylinder (13) provided with a first gas outlet (29) which interacts with a choke element (34, 35). The arrangement is particularly suitable for a machine gun, wherein the barrel (10), the gas cylinder (13), the first gas outlet (29) and the choke element (34, 28) are designed and arranged in such a way that a temperature-dependent change in the length of the barrel (10) causes a relative movement between the gas cylinder (13) and the choke element (34, 28), so that the choke element (34, 28) seals the first gas outlet (29) more or less completely and regulates the gas pressure in the gas cylinder (13) according to the temperature of the barrel.

L'invention concerne un dispositif de prise de gaz (3) pour un canon d'arme à feu (10), dont l'alésage (7) est en liaison communiquante avec un cylindre à gaz (13) qui est muni d'une première ouverture de sortie de gaz (29) qui coopère avec un élément d'étranglement (34, 35). Le dispositif est approprié notamment pour une mitrailleuse dont le canon (10), le cylindre à gaz (13), la première ouverture de sortie de gaz (29) et l'élément d'étranglement (34, 28) sont configurés et disposé de telle façon qu'une variation de longueur du canon (10) due à la température provoque un déplacement relatif entre le cylindre à gaz (13) et l'élément d'étranglement (34, 28), de sorte que l'élément d'étranglement (34, 28) étanchéifie plus ou moins la première ouverture de sortie de gaz (29) et règle la pression gazeuse exercée dans le cylindre à gaz (13) d'une façon correspondant à la température du canon.

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