Bullet with Concave Rear Jacket for Barrel Engagement
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Solution Overview
Problem
Conventional handgun cartridges lack optimal penetration capabilities and controlled component separation upon terminal impact, leading to reduced accuracy and increased barrel wear.
Innovation Solution
A cartridge design featuring a steel forward component with a spin-inhibiting feature, a copper jacket, and a concave rearward end that enhances obturation and radial deformation, allowing for improved accuracy and controlled separation of components upon impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional handgun cartridges use traditional bullet designs, then manufacturing is simpler, but penetration capabilities and controlled component separation are insufficient
Solution Approach 1:
The bullet is divided into distinct components: a forward component (nose portion), a core component (lead or copper), and a copper jacket. These components are assembled together with specific interfaces (such as the rearward body portion of the forward component fitting into the core component) to achieve controlled separation upon terminal impact while maintaining penetration capabilities. The segmentation allows each component to perform its specific function optimally.
2Measurement precision
If the bullet uses a longer design with same weight, then accuracy is improved, but barrel forces and friction increase
Solution Approach 1:
The bullet design optimizes the diameter distribution along its length, specifically creating a maximum diameter portion that extends for a minimal axial distance (less than 20% of the axial length of the forward component). This parameter optimization allows the bullet to achieve improved accuracy through enhanced engagement with the barrel while minimizing barrel forces and friction by reducing the contact area at the maximum diameter portion.
3Ease of manufacture
If the jacket engages the cylindrical mid portion with axial extending range, then manufacturing tolerance is increased, but structural precision may be compromised
Solution Approach 1:
The design specifies that the jacket forward edge engages the cylindrical mid portion of the forward component, creating an axial extending range where the jacket edge may engage. This geometric parameter design provides flexibility and increased tolerance during manufacturing for the positioning of the forward edge of the jacket, while the precise engagement geometry maintains sufficient positioning precision for accurate barrel engagement.
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 enhances accuracy by maintaining consistent engagement with the barrel, reduces barrel wear, and facilitates faster yawing and fragmentation for increased stopping power.
Implementation Method 1
the concavity allows the propellant expansion to impart a radial force component acting on the rearward end of the projectile to deform the rearward end of the projectile outwardly providing more consistent engagement of the jacket with the barrel
Implementation Method 2
The feature may be protruding or recessed structure that conforms the lead or copper core during assembly to an inverse of such shape providing a locking feature between the core and the steel forward component
Data Source
AI summary
A cartridge with a bullet has desirable penetration capabilities and controlled separation of components upon terminal impact. In embodiments of the invention, the bullet comprises a forward component, a lead core, and a copper jacket. The bullet having a forward nose portion with a plurality of cutaways spaced circumferentially about the nose portion. The copper jacket having a leading edge portion positioned at the cutaways.