Firearm Bolt Head Groove for Stationary Case Ejector
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Solution Overview
Problem
Existing case ejection devices for firearms require a significant amount of space within the weapon and lack reliable reproducibility in the ejection process.
Innovation Solution
A case ejector is integrated into the breech head with a groove that houses a stationary case ejector, allowing for simultaneous extraction and ejection, where the case ejector engages the case base and ejects it laterally using a recess and bevel for precise control, ensuring reliable ejection without additional force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a separate extraction device and ejection device are used, then the ejection function can be performed, but the installation space within the weapon becomes large
Solution Approach 1:
The patent combines the extraction device and ejection device into a single integrated mechanism. The extractor is formed as an integral part of the bolt head, with the extraction claw and ejection surface located on the same component. This merging of functions reduces the overall installation space while maintaining reliable ejection through the coordinated design of the extraction and ejection surfaces.
Solution Approach 2:
The bolt head is designed to perform multiple functions: it serves as both the extraction device (through the extraction claw) and the ejection device (through the ejection surface). This multi-functionality eliminates the need for separate dedicated components, thereby reducing installation space while ensuring that both extraction and ejection functions are reliably performed by the same integrated mechanism.
2Reliability
If extraction and ejection are performed as separate processes, then each function can be optimized, but the ejection reproducibility is reduced
Solution Approach 1:
The patent merges the extraction and ejection processes into a single coordinated action performed by the integrated extractor. As the bolt retracts, the extraction claw engages the cartridge case base rim to extract it, and simultaneously the ejection surface pushes the extracted case laterally. This combined process ensures consistent ejection reproducibility while simplifying the overall mechanism compared to separate devices.
Solution Approach 2:
The extractor is pre-positioned on the bolt head with the extraction claw and ejection surface configured in advance. When the bolt retracts, the extraction claw automatically engages the cartridge case base rim, and the ejection surface is already positioned to push the case laterally once extracted. This preliminary configuration ensures reproducible ejection without requiring complex separate processes.
3Volume of moving object
If the ejector is integrated into the bolt head with a groove, then the space requirements are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The extractor is formed as an integral part of the bolt head, with the groove for receiving the cartridge case and the ejection surface configured directly on the extractor. This integration eliminates the need for separate alignment of multiple components, reducing manufacturing precision requirements compared to assembling separate extraction and ejection devices with precise tolerances.
Solution Approach 2:
The extractor is designed with distinct functional zones: the extraction claw for engaging the cartridge case base rim, the groove for receiving and guiding the case, and the ejection surface for lateral propulsion. This segmentation of functions within a single integrated component allows for straightforward manufacturing while maintaining precise functional performance.
Data Source
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AI summary
The invention proposes a case discharge device having a case ejector (6) for ejecting a case (11) or a misfire for a weapon (20) having a bolt (2) with a bolt head (1), wherein a munition is supplied to a weapon barrel (22) of the weapon (20) by the bolt (2) and the case (10) or the misfire is pulled out of the weapon barrel (20). Said case discharge device is characterized in that, now, in the bolt head (1), there is situated a groove (5) into which a case ejector (6) which is static with respect to a weapon housing engages. During the return of the bolt (2), the case ejector (6) which is static with respect to the weapon housing slides within the groove (5) and engages on the bottom (10) of the case (11) in order to release the latter from the bolt (2) and, after the release, discharge said case.