Multi-Caliber Bolt Assembly for Reliable Cartridge Control
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Solution Overview
Problem
Firearm bolts are designed to handle only specific ammunition sizes and calibers, limiting the versatility of firearms to use different types and calibers without the need to change the bolt.
Innovation Solution
A multi-caliber bolt assembly comprising a bolt body, extractor, case guide, and resilient element that automatically adjusts to accommodate various ammunition dimensions by exerting a force to engage and hold the cartridge casing against the bolt face, ensuring alignment and control during loading, firing, and ejection cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a firearm bolt is designed for a specific ammunition caliber, then it can reliably handle that caliber, but it cannot accommodate different calibers without changing the bolt
Solution Approach 1:
The bolt assembly is designed with a universal extractor and case guide system that can handle multiple calibers. The extractor features a curved engagement surface and adjustable positioning that accommodates different rim sizes, while the case guide can be positioned at multiple locations along the bolt body to suit various cartridge dimensions, allowing a single bolt to serve multiple caliber functions
Solution Approach 2:
The extractor is designed to be movable rather than fixed, allowing it to adjust its position dynamically based on the caliber being used. The resilient element provides dynamic engagement force that adapts to different cartridge sizes, enabling the bolt to maintain reliable extraction across multiple calibers without requiring separate fixed extractors for each caliber
2Adaptability or versatility
If the extractor and case guide are made movable to accommodate different calibers, then versatility improves, but control over the cartridge casing during operation may be compromised
Solution Approach 1:
The resilient element automatically adjusts the engagement force between the extractor/case guide and the cartridge casing based on the caliber being used. Larger calibers naturally exert more force on the extractor, which the resilient element compensates for by providing proportional resistance, ensuring consistent control and extraction reliability across different calibers without manual adjustment
Solution Approach 2:
The system changes the engagement parameters dynamically through the resilient element, which provides variable force based on the caliber. The extractor and case guide positioning can be adjusted to change geometric parameters, allowing the same components to maintain reliable control over cartridges of different sizes by adapting their engagement characteristics
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 the use of different ammunition sizes and calibers in a single firearm, maintaining control and preventing jamming or misalignment throughout the operation, with high-speed cycling capabilities.
Implementation Method 1
The resilient element is designed to exert a force to move the extractor and the case guide together to engage and hold the cartridge casing against the bolt face
Data Source
AI summary
A multi-caliber bolt assembly includes a bolt body, a bolt face, an extractor, a case guide, and a resilient element. The extractor is movably coupled to the bolt body. The extractor is designed to engage and retain a rim of the cartridge casing. The case guide is movably coupled to the bolt body opposite the extractor. The case guide is designed to engage the cartridge casing. The resilient element is coupled to the extractor and the case guide. The resilient element is designed to exert a force to move the extractor and the case guide together to engage and hold the cartridge casing against the bolt face when the extractor and the case guide are moved apart against the force by insertion of the cartridge casing between the extractor and the case guide regardless of the size of the cartridge casing.