Frangible bullet
US6694888B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Oct 2, 2001 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Oct 2, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B12/34
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A frangible hollow point bullet is disclosed. The bullet (or slug) is formed from a frangible material such as sintered copper to provide a bullet-shaped body. A plurality of coaxial, substantially cylindrical cavities having progressively decreasing bore diameters are formed in the nose of the bullet-shaped body, extending rearwardly therefrom, to provide a bullet that both expands and fragments in a semicontrolled fashion upon impact with a target. In a preferred embodiment, at least one of the coaxial cavities is multiply scored to provide a substantially symmetric fragmentation pattern and controlled and uniform fragment size. Controlling the aggregate depth of the coaxial cavities enables the retention of a recoverable base or shank that is suitable for ballistic investigation following bullet impact. Bullets and slugs, made in accordance with the present invention, have standard calibers and, when incorporated into conventional cartridges and shotgun shell casings respectively, may be fired at subsonic, sonic or supersonic velocities by conventional weapons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.