Percussion Disruptor Barrel Centering Without O-Rings
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Solution Overview
Problem
Existing ordnance disarming devices, such as percussion activated non-electric (PAN) disruptors, are not suitable for extreme temperature conditions due to the failure of O-rings, which can break, crack, shrink, or disintegrate.
Innovation Solution
The development of an ordnance disarming device that utilizes a PAN disruptor with a metal centering device for the inner liner barrel, eliminating the need for O-rings and incorporating a conically tapered receiver/breech cap to automatically center the inner barrel within the outer barrel, along with gas ports for recoil reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If O-rings are used to secure the inner barrel in a PAN disruptor, then the device can be assembled and operated under normal conditions, but the O-rings break, crack, shrink, or disintegrate in extreme temperature conditions
Solution Approach 1:
The patent removes the O-ring sealing mechanism entirely and replaces it with a metal centering device that provides both positioning and sealing functions. This extraction of the problematic O-ring component eliminates the temperature sensitivity issue while maintaining the necessary sealing and centering functions through alternative metal components.
Solution Approach 2:
The patent changes the material parameter from rubber (O-rings) to metal (centering device and barrel components). This material parameter change fundamentally alters the temperature resistance characteristics, allowing the device to operate reliably in extreme temperature conditions where rubber-based O-rings would fail.
2Reliability
If a metal centering device is used instead of O-rings, then the device can operate in all weather conditions including extreme temperatures, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into the metal centering device: it provides centering alignment, sealing, and structural support simultaneously. By combining these functions into a single integrated component rather than using separate O-rings and centering mechanisms, the overall device complexity is managed while achieving reliable operation in all weather conditions.
Solution Approach 2:
The metal centering device serves multiple purposes: it centers the inner barrel within the outer barrel, provides sealing between the barrels, and maintains structural integrity across temperature extremes. This multi-functionality reduces the need for additional separate components, balancing complexity with enhanced reliability.
3Adaptability or versatility
If conventional projectiles are used in the disruptor, then the device utilizes standard ammunition, but the recoil increases
Solution Approach 1:
The patent introduces gas ports as an intermediary mechanism between the projectile and the operator. These gas ports allow some of the propellant gas to escape during firing, acting as a mediator that reduces the recoil force transmitted to the operator while still allowing conventional projectiles to be used effectively.
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 device effectively disarms ordnance in all weather conditions, including extreme temperatures, without relying on O-rings and reduces recoil through the use of gas ports, ensuring reliable operation and safety.
Implementation Method 1
the receiver/breech cap has a conical end to mount into the forward end of the outer barrel and threadably receives the forward end of the inner barrel so as to automatically center the inner barrel within the outer barrel
Implementation Method 2
incorporating a conically tapered receiver/breech cap to automatically center the inner barrel within the outer barrel, along with gas ports for recoil reduction
Data Source
AI summary
An ordnance disarming device in the form of a percussion active, non-electric disrupter has an outer barrel and an inner barrel extending through the outer barrel. A receiver/breech cap is threaded onto the forward end of the inner barrel. The receiver/breech cap has exhaust ports for expelling combustion gasses, so as to function as a muzzle brake. The receiver/breech cap automatically centers the inner barrel in the outer barrel, such that the assembly is self-centering. No O-rings are needed, such that the device can be used in extreme temperatures.