Hollow point bullet and method of manufacturing same
AssigneeSig Sauer, Inc.
InventorDaniel L. Powers, JR.
Life of this patent
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Abstract
Hollow point bullets and methods of manufacturing such bullets are herein disclosed. The disclosed bullets include a monolithic core encased by a metal jacket. The jacket includes a plurality of v-shaped channels formed on the inner surface of the sidewall of the jacket. The core includes a conical recess formed therein and a cavity in communication with the conical recess. The cavity formed in the core may have a cross-section shape defined by a plurality of points spaced equidistantly about the circumference of an imaginary circle. A plurality of stress risers may be formed in the core, each stress riser extending from the cavity to a v-shaped channel in coincidence with a point of the cross-section shape of the cavity.
Claims20
A bullet comprising:
- a center axis;
- a substantially cylindrical core comprising:
- a nose portion having a conical recess formed therein;
- the core having a cavity formed therein, the cavity extending along the center axis and in communication with the conical recess, the cavity having a cross-section shape defined by a plurality of points spaced equidistantly around a circumference of an imaginary circle;
- and
- a plurality of stress risers formed in the core, each stress riser extending radially outward from the center axis in coincidence with a point of the cross-section shape;
- and
- a jacket surrounding the core, the jacket comprising:
- a base;
- a sidewall comprising a top edge, an inner surface and an outer surface, the inner surface comprising a plurality of v-shaped channels formed therein, each v-shaped channel being adjacent to one of the stress risers and extending longitudinally from the top edge such that a distance from the inner surface to the outer surface increases as a function of distance from the top edge toward the base.
A bullet comprising:
- a center axis;
- a core;
- and
- a jacket surrounding the core, the jacket comprising a sidewall having an outer surface, an inner surface, and a plurality of indentations formed in the outer surface about a circumference of the jacket, each indentation being angled with respect to the center axis such that a bottom portion of each indentation extends at least 50% more into the outer wall than a top portion of each indentation.
A method of manufacturing a bullet, the method comprising:
- inserting a monolithic core into a jacket, the jacket having a base, a sidewall having an outer surface, an inner surface, a circular top edge having a first radius, and a center axis centered about the circular top edge;
- skiving the jacket to form a plurality of inwardly angled v-shaped channels in the inner surface, each v-shaped channel being angled with respect to the center axis such that a distance from the inner surface to the outer surface increases as a function of distance from the top edge toward the base;
- forming a cavity in the monolithic core, the cavity having a cross-section shape defined by a plurality of points spaced equidistantly around a circumference of an imaginary circle centered about the center axis;
- and
- forming a plurality of scores in the monolithic core, each score extending from one of the v-shaped channels toward the center axis.
Dependencies are inferred from the claim text.