Reloadable Non-Lethal Training Cartridge Design
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Solution Overview
Problem
Traditional non-lethal ordnance requires specialized training due to its different performance compared to lethal ordnance, and existing non-lethal training cartridges are costly and difficult to reload, making them inefficient for repeated use.
Innovation Solution
A reloadable non-lethal training cartridge design featuring a removable high pressure chamber and non-lethal payload, allowing for easy replacement and reuse, with features like o-rings, washers, and various engagement mechanisms to ensure consistent propellant burn and accurate projectile deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional non-lethal training cartridges are used, then training can be conducted with non-lethal ordnance, but the cartridges are costly and difficult to reload, requiring frequent replacements
Solution Approach 1:
The cartridge is divided into separate functional components: a reusable cartridge case and a disposable high-pressure chamber containing the propellant. This segmentation allows the expensive cartridge case to be reused while only the cheaper propellant chamber is replaced after firing, dramatically improving productivity and reducing costs.
Solution Approach 2:
The design enables recovery and reuse of the cartridge case after firing by discarding only the consumed high-pressure chamber and propellant. The cartridge case can be reloaded with fresh chambers, transforming a single-use cartridge into a reusable system that maintains training effectiveness while reducing waste and cost.
2Reliability
If non-lethal ordnance is used for training, then specialized training is required due to different performance characteristics, but this increases training complexity and cost
Solution Approach 1:
The cartridge case is designed to be universal and compatible with standard firearm platforms, allowing the same case to accommodate different non-lethal payloads (bean bags, rubber bullets, foam projectiles). This multi-functionality enables a single training system to cover various non-lethal ordnance types, reducing overall system complexity while maintaining training authenticity.
3Productivity
If a reloadable cartridge design is implemented, then cost-effectiveness and reuse are improved, but the structural complexity increases with multiple chambers and engagement mechanisms
Solution Approach 1:
The high-pressure chamber is extracted as a separate, removable component from the cartridge case, connected through a threaded engagement mechanism. This extraction allows the chamber to be easily removed and replaced without complex tools or procedures, achieving reloadability while keeping the structural complexity manageable through simple threaded connections.
4Reliability
If consistent propellant burn is achieved through high/low pressure chambers, then interior ballistics consistency is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The cartridge case incorporates distinct high-pressure and low-pressure chambers with different functional requirements. The high-pressure chamber is designed for consistent propellant combustion with precise sealing surfaces, while the low-pressure chamber accommodates the payload with different dimensional tolerances. This local quality approach optimizes manufacturing precision requirements for each specific zone rather than applying uniform tolerances throughout.
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
Enables cost-effective and efficient training by allowing the reuse of cartridge cases and payloads, reducing the need for frequent replacements and enhancing training efficiency with consistent interior ballistics and accurate projectile delivery.
Implementation Method 1
a rear high pressure chamber removably disposed within the base threaded aperture of the cartridge case... a propellant vent hole formed therethrough
Implementation Method 2
the high pressure chamber further comprises an o-ring disposed around the circumferential portion and adjacent the base, so as to contact the cartridge case base threaded aperture and the high pressure chamber base and thereby create a seal
Implementation Method 3
a rear edge adjacent the rear face having a frictional engagement means capable of frictional engagement with the forward end of said cartridge case
Data Source
AI summary
A reloadable non-lethal training cartridge is provided comprising a cartridge case, a rear high pressure chamber removably disposed within the base thereof, and a non-lethal payload portion removably disposed adjacent the forward end of the cartridge case. The rear high pressure chamber is provided with a base capable of interacting with a removal tool, such as a hexagonal shaped base capable of interacting with a standard socket. Further, the non-lethal payload portion is comprised of a base and a non-lethal payload, the non-lethal payload and base being removably attached such that one or both of said components may be reused. In addition, the non-lethal payload may be weighted, so as to increase the accuracy thereof.