Bullet Jacket Double-Wall Structure for Barrier Penetration and Expansion
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Solution Overview
Problem
Bullets face challenges in penetrating intermediate materials like glass or metal before expanding effectively, often resulting in plugging or inadequate expansion.
Innovation Solution
A bullet design featuring a core with a hollow point and a jacket that includes a curled end portion forming a double wall, skives, and a shear groove to enhance penetration and controlled expansion, with optional deformable material filling the cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bullet uses a conventional solid point design, then manufacturing is simpler, but penetration through hard barriers and controlled expansion are insufficient
Solution Approach 1:
The bullet is divided into distinct functional segments: a core providing structural integrity, a jacket with skives for controlled expansion, and a hollow point cavity for deformable material to enhance terminal performance. This segmentation allows each component to be optimized independently for its specific function while achieving overall superior penetration and expansion characteristics.
Solution Approach 2:
The deformable material is nested within the hollow point cavity of the core, creating a multi-layered structure where the core contains the cavity which contains the deformable material. This nested arrangement maximizes the use of internal space to enhance terminal performance without increasing external dimensions.
2Strength
If the jacket is made thicker to prevent plugging, then penetration strength improves, but expansion control and petal formation are compromised
Solution Approach 1:
The jacket is designed with non-uniform thickness and structural characteristics: thicker portions provide strength and prevent plugging, while thinner portions with skives enable controlled expansion. The skives are strategically positioned to initiate petal formation at specific locations while maintaining overall jacket integrity during penetration through hard barriers.
Solution Approach 2:
The jacket is segmented into functional regions: a strong main body for penetration resistance, localized skives for expansion initiation, and a curled end portion for controlled petal formation. This segmentation allows different regions to perform different functions simultaneously, achieving both strength and expansion control.
3Strength
If the bullet is designed for maximum penetration, then expansion performance is reduced, but the patent achieves both through the hollow point and deformable material
Solution Approach 1:
The hollow point cavity changes the physical parameters of the bullet by creating a volume for deformable material, which alters the mass distribution and energy delivery characteristics. This parameter change enables the bullet to maintain penetration capability while providing enhanced expansion performance when encountering softer targets, achieving adaptability across different target types.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design improves penetration through hard barriers and controlled expansion in softer targets by preventing plugging and ensuring consistent petal formation, enhancing terminal performance.
Implementation Method 1
The end portion of the jacket is directly adjacent the tip portion of the core, the end portion of the jacket curling radially inwardly toward the central axis... the end portion of the jacket curling radially inwardly to form a double wall
Implementation Method 2
The plurality of skives are formed in the ogive portion of the jacket... ensuring consistent petal formation
Implementation Method 3
a shear groove is formed in the jacket, the shear groove configured to prevent overexpansion of petals formed upon impact
Implementation Method 4
The soft point fills the cavity... optional deformable material filling the cavity
Data Source
AI summary
Devices and methods for a bullet with a strengthened mouth for improved penetration and expansion. In embodiments, a portion of the jacket is folded to provide double walls at the mouth. In embodiments, the jacket and core are partially bonded and partially separated.