Powerhead cartridge
AssigneeAqua Craft, Inc.
InventorRhett McNair
Life of this patent
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Abstract
A 30-30 casing has sharpened rings formed in its enlarged base. Powder is packed in the casing, and it is sealed by inserting a primer portion, which is a 38 caliber pistol shell with a primer, in the open end of the packed casing and compressing the edge of the casing in the base area of the primer portion. Radial extensions on the casing hold the cartridge centered in a barrel spaced from a firing pin. The primer is ignited by hitting the sharpened rings against an underwater object and thus driving the cartridge and primer rearward against a fixed firing pin. The casing rockets forward out of the barrel, leaving the primer piece and smashing into the underwater object while the powder burns.
Claims8
Underwater powerhead firearm apparatus comprising a cartridge having a head piece and a base primer piece, wherein the head piece comprises a rifle cartridge casing blank having a cylindrical wall joined integrally with an impervious flat, radially extending head, propellant powder within the cylindrical wall, and wherein the primer piece comprises a cartridge casing having a relatively short cylindrical wall inserted within an open end of the rifle cartridge casing, an integrally formed base joined with the short cylindrical wall, and a primer inserted in the base for firing into powder disposed within the cylindrical wall, an open end edge of the rifle casing being necked down around a joint of the base and small cylindrical wall, tightly sealing the cartridge.
Dependencies are inferred from the claim text.