Semiautomatic Breaching Tool Ramming Head Force Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing breaching tools with manual bolt action or revolver-style receivers require manual loading and unloading, are inefficient in distributing breaching force, and struggle to effectively breach tempered glass, particularly hurricane-style laminated glass.
Innovation Solution
A semiautomatic breaching tool utilizing a modified semiautomatic rifle receiver and propulsion assembly, with a compression spring and shaft collar system, that automatically loads and ejects blank cartridges, and features a ramming head with a center pin and knife-edge design for efficient force distribution and glass penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual bolt action or revolver-style receivers are used in breaching tools, then the device complexity is reduced, but the productivity and ease of operation deteriorate due to manual loading and unloading requirements
Solution Approach 1:
The breaching tool uses the energy from the discharged blank cartridge to automatically cycle the receiver, eject spent casings, and load new blanks. The system serves itself by using its own operational energy to perform reloading functions without external manual intervention, thereby increasing productivity while maintaining reasonable device complexity through adaptation of existing semiautomatic rifle mechanisms
2Device complexity
If force is equally distributed amongst all projections on the ramming head, then the device complexity is simplified, but the manufacturing precision and reliability deteriorate because tempered glass cannot be effectively breached
Solution Approach 1:
The ramming head features a center pin projection that concentrates breaching force at a specific location to initiate glass failure, while surrounding projections distribute force to complete the breach. This localized force concentration at critical points improves reliability for breaching tempered and hurricane glass, while the overall design remains relatively simple
3Speed
If the ramming head strikes tempered glass directly, then the speed of breaching is improved, but the strength and durability of the tool deteriorate due to excessive wear on projections
Solution Approach 1:
The breaching tool incorporates a resilient element between the ramming head projections and the glass surface that absorbs and distributes impact forces. This cushioning mechanism protects the projections from excessive wear and damage while maintaining effective breaching speed, as the resilient material deforms to accommodate the impact and then rebounds to complete the breach
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 tool enables efficient automatic operation, improved force distribution on the ramming head, and enhanced capability to breach tempered glass, including hurricane glass, by using the energy from discharged blank cartridges to propel the ramming head forward, reducing the need for manual intervention and increasing breaching efficiency.
Implementation Method 1
A portion of the barrel is surrounded by a compression spring which is bordered on one side by a shaft collar fixedly attached to the distal end of the barrel and a spring can that surrounds the compression spring
Implementation Method 2
uses the force generated in the chamber of a semiautomatic receiver to push a propulsion assembly forward
Data Source
AI summary
A breaching tool is powered by a blank cartridge in a breaching gun and includes a barrel, a propulsion assembly in the barrel, and a spring assembly around the barrel. When the cartridge is discharged in a chamber in fluid communication with the barrel's bore, pressure produced by the discharged cartridge propels the propulsion assembly forward from a ready position to an extended position, forcing a ramming head forward. The spring assembly has a compression spring in a spring can that biases the assemblies and ramming head back to the ready position. The breaching tool also includes a handguard that extends over and past the barrel's proximal half and surrounds a rear portion of the spring can. When used with a semiautomatic breaching gun, the breaching tool includes gas block over a gas port in the barrel, and a gas tube extends back to the breaching gun's bolt carrier group.