Rapid expansion bullet

Details Rapid expansion bullet Rapid expansion bullet

1989-08-28

1990-08-07

Tudor, Harold J.

Ammunition and explosives

Projectiles

Tubular

102507, 102517, 102532, F42B 1034

Patent

active

049458361

ABSTRACT:
A high energy rapid expansion bullet for handguns, rifles and the like with greater killing power and protection from excessive gas pressures due to overloading of powder or obstruction in the gun barrel and without over penetration which could endanger bystanders. A standard bullet (e.g., 45 caliber, 9 MM) is provided with a through bore (draft hole) from the tip to the base of the bullet. The inner end of the bore has a conical seat spaced from the central portion of a malleable disc seal surrounded by an annular seat for the rim of the disc.
Gases generated by firing of the bullet deform the disc into contact with the conical seat and wedge the base of the bullet outward to seal the gases in the barrel of the gun and pull the rim of the disc inward to aid in separating the disc from the bullet as soon as the bullet leaves the barrel. Excessive gas pressure such as could come from overloading (too much powder), ruptures the disc and vents the gases to the atmosphere.

REFERENCES:
patent: 53582 (1866-04-01), DeCowsey
patent: 103514 (1870-05-01), Shock
patent: 590428 (1897-09-01), Bennett
patent: 1292388 (1919-01-01), Bowers
patent: 2324551 (1943-07-01), Albree
patent: 4742774 (1988-05-01), Flatau
patent: 4777883 (1988-10-01), Chovich

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