Sharp-Edge Projectile Jacket for Glass Penetration

Solution Overview

Problem

Conventional firearm ammunition often bounces or glances off glass surfaces when striking at an angle, failing to effectively penetrate and cause damage.

Innovation Solution

A projectile with a machined sharp edge is designed, featuring a jacket with a closed rearward end and an open forward end that tapers inwardly to define an ogive portion, where the forward end terminates in a plane perpendicular to the longitudinal centerline, creating a sharp edge around the outer perimeter to enhance glass penetration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional ammunition with rounded or tapered leading ends is used, then aerodynamic performance is improved, but glass penetration capability deteriorates due to bouncing or glancing off at angles

Engineering Contradiction:

Improveaerodynamic performanceVSAvoidglass penetration capability

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The projectile applies different geometric qualities to different parts: the leading end features a sharp edge with perpendicular termination for glass penetration, while the rear portion maintains streamlined shaping for aerodynamics. This local differentiation allows the projectile to optimize for both functions simultaneously.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The projectile breaks the conventional symmetric ogive shape by terminating the forward end in a plane perpendicular to the longitudinal centerline, creating an asymmetric sharp edge. This asymmetric geometry provides superior glass penetration while maintaining overall aerodynamic efficiency through careful balancing of the shape.

Inventive Principle:

Principle #4Asymmetry

2Loss of energy

If the forward end of the jacket is tapered to a point, then aerodynamic efficiency is improved, but the ability to cut into glass surfaces deteriorates

Engineering Contradiction:

Improveaerodynamic efficiencyVSAvoidglass cutting capability

Core Design Contradiction:

Loss of energyVSObject-affected harmful factors

Solution Approach 1:

The projectile applies different geometric qualities to different parts: the leading end features a sharp edge with perpendicular termination for glass penetration, while the rear portion maintains streamlined shaping for aerodynamics. This local differentiation allows the projectile to optimize for both functions simultaneously.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The projectile breaks the conventional symmetric ogive shape by terminating the forward end in a plane perpendicular to the longitudinal centerline, creating an asymmetric sharp edge. This asymmetric geometry provides superior glass penetration while maintaining overall aerodynamic efficiency through careful balancing of the shape.

Inventive Principle:

Principle #4Asymmetry

3Strength

If a hollow point design is used, then terminal ballistics performance is improved, but glass penetration at angles deteriorates due to rounded perimeter

Engineering Contradiction:

Improveterminal ballistics performanceVSAvoidglass penetration at angles

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The projectile applies different geometric qualities to different parts: the leading end features a sharp edge with perpendicular termination for glass penetration, while the rear portion maintains streamlined shaping for aerodynamics. This local differentiation allows the projectile to optimize for both functions simultaneously.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The sharp edge geometry is built into the projectile during manufacturing before firing. This preliminary geometric configuration ensures that upon impact with glass at any angle, the projectile immediately engages the surface with the sharp edge, preventing glancing and ensuring penetration before the hollow point expansion characteristics come into play.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11566877B1Glass penetrating projectile

Publication Date: 2023.01.31 TRUE VELOCITY IP HOLDINGS LLC

AI summary

A projectile for use in a firearm ammunition cartridge, and a method of forming the projectile, the projectile including a core, and a jacket in which the core is disposed, the jacket having a closed rearward end and an open forward end, the forward end tapering inwardly toward a longitudinal centerline of the jacket to define an ogive portion of the projectile, wherein the forward end of the jacket terminates in a plane that is perpendicular to the longitudinal centerline of the jacket, and wherein an outer perimeter of the forward end of the jacket has a machined sharp edge.