High peak pressure notched cartridge case

Details High peak pressure notched cartridge case High peak pressure notched cartridge case

1988-11-01

1991-01-22

Tudor, Harold J.

Ammunition and explosives

Cartridges

Case

102430, 102469, F42B 526

Patent

active

049861867

ABSTRACT:
A notched cartridge or casing is provided to mitigate the shock damage to a gun barrel or firing chamber when a cartridge with large amounts of explosive or propellant is fired. The cartridge or casing comprising a generally cylindrical shell with an open top end and a closed base is provided with an annular area near the base and a circular area on the base which have reduced wall thicknesses compared to the rest of the cartridge. The annular and circular areas have external surfaces which are inwardly displaced with respect to the outer surface of the remainder of the cartridge. Upon firing of the cartridge, the areas of reduced wall thickness expand outwardly and are plastically deformed without touching the barrel or firing chamber. Damage to the barrel and/or breech is prevented and the cartridge is easily removed for reloading of the gun system.

REFERENCES:
patent: 602875 (1898-04-01), Ross
patent: 1103202 (1914-07-01), Hoagland
patent: 1103203 (1914-07-01), Hoagland
patent: 2931039 (1960-04-01), Henning et al.
patent: 3261291 (1961-07-01), Woodring et al.
patent: 3609904 (1971-10-01), Scanlon
patent: 3808974 (1974-05-01), Herter
patent: 3948178 (1976-04-01), Luther et al.
patent: 4233903 (1980-11-01), Lage
patent: 4681038 (1987-07-01), Washburn
patent: 4738202 (1988-04-01), Hebert

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