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US 2003/0145755 A1Published application
Shear fragmenting bullet
OwnerDavid L. Brieseinventor
Life of this patent
Estimating the term…
Abstract
A bullet has a jacket and a core seated into the jacket. The core consists of helically formed strands of malleable material swaged into a cylindrical shape. The strands have a uniform pitch along the core, and fragment uniformly into small portions upon impact. A method of making a bullet includes providing helically formed strands of malleable material, swaging the strands, and seating the strands into a jacket.
Claims14
A bullet comprising:
- a metal jacket, of substantially uniform wall thickness, having an enclosed base and a substantially cylindrical body extending transverse said base, and
- a core having a plurality strands of a malleable material having a low shear modulus, said strands being helically formed together in a spiral configuration and swaged into a uniform solid cylinder having a selected precise mass, with each said strand extending rotationally and obliquely in a continuous fashion around said cylinder, said core being seated within said jacket against said base.
A bullet comprising:
- a metal jacket, of substantially uniform wall thickness, having an enclosed base and a substantially cylindrical body extending transverse said base, said jacket having an inwardly tapering tip opposite said base, said tip being created by point forming, and
- a core having from two to fifteen strands of a malleable material, said material of said strands having a shear modulus of less than 3.5 million pounds per square inch and being chosen from the group of lead, lead alloy, tin, magnesium and aluminum, said strands being helically formed together in a spiral configuration and swaged into a uniform solid cylinder having a selected precise mass, with each said strand extending rotationally and obliquely in a continuous fashion around said cylinder at a pitch of between one half and five turns per inch, said core being seated within said jacket against said base.
A method of making a bullet comprising the steps of:
- providing a plurality of strands of helically formed together in a spiral configuration, said strands being of malleable material having a low shear modulus,
- swaging said strands into a uniform solid cylindrical core having a selected precise mass, with each said strand extending rotationally and obliquely in a continuous fashion about said core,
- providing a jacket, of substantially uniform wall thickness, having an enclosed base and a substantially cylindrical body extending transverse said base, and
- seating said core into said jacket.
1 more element
A method of making a bullet comprising the steps of:
- providing from two to fifteen strands of helically formed together in a spiral configuration, said strands being of malleable material, said material of said strands having a shear modulus of less than 3.5 million pounds per square inch and being chosen from the group of lead, lead alloy, tin, magnesium and aluminum,
- swaging said strands into a uniform solid cylindrical core having a selected precise mass, with each said strand extending rotationally and obliquely in a continuous fashion about said core at a pitch of between one half and five turns per inch,
- providing a jacket, of substantially uniform wall thickness, having an enclosed base and a substantially cylindrical body extending transverse said base
- seating said core into said jacket, and
- point forming said jacket after said step of seating said core, said point forming creating an inwardly tapering tip on said body of said jacket, opposite said base
2 more elements
Dependencies are inferred from the claim text.