Firearm Barrel Forward Lug Lock-Up Mechanism
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Solution Overview
Problem
Traditional short recoil operated pistol barrel designs with cam and lug surfaces located near the bore constrain the ability to lower the bore axis, limiting the robustness and consistency of the lock-up system.
Innovation Solution
A pistol barrel design featuring a forward lower lug surface positioned ahead of the trigger guard and side cams that interact with corresponding lugs in the pistol frame, allowing for a robust and reliable operation by engaging and disengaging as the barrel moves in and out of battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cam and lug surfaces are located near the bore, then the lock-up system is simpler, but the bore axis cannot be lowered and robustness is reduced
Solution Approach 1:
The patent relocates the cam and lug surfaces from a traditional position near the bore to a forward lower position ahead of the trigger guard. This spatial repositioning in a different dimension allows the bore axis to be lowered while maintaining lock-up functionality, resolving the contradiction between ease of operation and device complexity.
2Reliability
If traditional lock-up system is used, then manufacturing is easier, but robustness and consistency are reduced
Solution Approach 1:
The patent changes the geometric parameters of the cam and lug surfaces by positioning them forward and lowering them below the traditional location. This parameter change creates a more robust lock-up system that engages more effectively, improving reliability while the surfaces remain machinable with standard equipment.
3Strength
If cam and lug surfaces are positioned forward and lower, then bore axis can be lowered and robustness improved, but the design becomes more complex
Solution Approach 1:
The barrel assembly is segmented into distinct functional components: the forward lower lug surface for primary lock-up, side cams for secondary engagement, and a recessed portion for slide interaction. This segmentation allows each element to perform its specific function efficiently, creating a strong lock-up system while keeping individual components manufacturable.
Data Source
AI summary
The barrel of a pistol, specifically in a short recoil operated pistol, is comprised of multiple bearings surfaces comprised of cams and lugs that allow the pistol to function. The surfaces mechanically delay the pistol enough to allow the pistol to reliably function in the manner of an automatic firearm, chambering a round at the end of each cycle of operation. A barrel that locates a forward lug positioned horizontally in front of the trigger guard of the pistol with side cams that are shallow and interact in a way to provide the pistol with a robust and consistent lock up from shot to shot to provide an advantage in the function of the firearm.