Segmented Expandable Bullet for Low-Velocity Expansion
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Solution Overview
Problem
Conventional hollow point bullets require high speeds for reliable expansion, leading to increased recoil, noise, and wear on firearms, and do not effectively expand at lower speeds, compromising self-defense and hunting performance.
Innovation Solution
An expandable bullet design featuring a right circular cylindrical base with circumferential recesses and slits, allowing for controlled expansion through alternating deep and shallow slits that enable petals to open progressively upon impact, ensuring effective expansion at various velocities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hollow point bullets are designed to expand at high speeds, then reliable expansion is achieved, but recoil and noise increase, and wear on firearms increases
Solution Approach 1:
The bullet tip is segmented into multiple petals separated by alternating deep and shallow slits. This segmentation allows the bullet to expand in a controlled progressive manner, reducing the sudden force spike that causes recoil and noise while maintaining reliable expansion at various velocities
Solution Approach 2:
The bullet employs dynamic expansion characteristics where petals unfold in sequence rather than simultaneously. The alternating deep and shallow slits create a progressive deformation pattern that adapts to different impact velocities, ensuring reliable expansion without requiring excessive initial force
2Reliability
If conventional hollow point bullets are designed to expand at high speeds, then expansion is reliable, but expansion does not occur effectively at lower speeds
Solution Approach 1:
The bullet's petal structure with alternating deep and shallow slits creates dynamic expansion behavior that adapts to different impact velocities. At higher velocities, the deeper slits allow more extensive petal unfolding, while at lower velocities, the shallower slits provide sufficient expansion without requiring excessive force
Solution Approach 2:
The varying depths of slits create different structural parameters within the same bullet design. This parameter variation allows the bullet to respond differently to different impact energies, ensuring effective expansion across a wide velocity range from supersonic to subsonic speeds
3Object-affected harmful factors
If frangible bullets are used to eliminate overpenetration, then overpenetration is prevented, but penetration capability through barriers is reduced
Solution Approach 1:
The bullet applies different structural qualities to different regions: the tip contains alternating deep and shallow slits for controlled expansion, while the base and body maintain full structural integrity. This local differentiation allows the tip to expand and prevent overpenetration while the body retains sufficient strength to penetrate common barriers
Data Source
AI summary
The invention discloses an expandable bullet having a set of deformable petals each including a main and set of two small petals, with the petals formed by a pattern of slits across a hollow core of the bullet tip.