Shotshell basewad

F - Mech Eng,Light,Heat,Weapons – 42 – B

Patent

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Details

F42B 7/02 (2006.01) F42B 5/307 (2006.01) F42B 7/08 (2006.01) F42B 8/12 (2006.01) F42B 12/74 (2006.01)

Patent

CA 2355885

An ammunition cartridge (50) has a tube (51) extending along a central longitudinal axis from an aft end to a fore end. A metallic head (53) has a sleeve portion (61) secured to the tube along an aft section of the tube and has a centrally-apertured web portion (66) spanning the sleeve portion to form a base of the cartridge. A basewad (52) contained within the tube separately formed therefrom is located proximate the aft end of the tube. The basewad (52) has a generally cylindrical exterior surface. The basewad interior surface (72) extends from a generally forward-facing inner portion, forward and outward to a generally inward-facing fore portion (76) to define a skirt portion of the basewad. At least one projectile is carried within a fore volume of the tube. A propellant charge (96) is located aft of the projectile. Wadding (92) is located between the propellant charge (96) and the projectile. The wadding (92) includes an aft portion located at least partially concentrically within the basewad skirt portion to define a powder chamber (94) containing the propellant charge (96).

L'invention porte sur une cartouche (50) de munitions constitué d'un tube (51) s'étendant le long d'un axe longitudinal central d'une extrémité arrière à une extrémité avant. Une tête (53) métallique comporte une partie (61) manchon fixée au tube le long d'une section arrière de celui-ci, et une partie (66) cloison percée au centre et enjambant la partie manchon de façon à former la base de la cartouche. Une bourre de culot (52) contenue dans le tube est placée à proximité de l'extrémité arrière de celui-ci. Cette bourre de culot présente une surface extérieure généralement cylindrique et une surface (72) intérieure qui s'étend, d'une section interne tournée vers l'avant, vers l'avant et vers l'extérieur pour former une partie (76) avant tournée généralement vers l'intérieur définissant la partie jupe d'une bourre de culot. Au moins un projectile est supporté dans un volume avant du tube. Une charge (96) propulsive est placé à l'arrière du projectile. Le bourrage (92) est placé entre la charge (96) propulsive et le projectile, et comprend une partie arrière partiellement concentrique dans la partie jupe de la bourre de culot de façon à former une chambre (94) renfermant la charge (96) propulsive.

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