Firearm Extractor Assembly with Stirrup-Shaped Design
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Solution Overview
Problem
Existing firearms extractor assemblies require significant installation space, are difficult to dismantle and maintain, and have production costs due to complex manufacturing processes, while also being prone to accidental disassembly and not providing a closed outer contour.
Innovation Solution
A compact and stable extractor assembly with a stirrup-shaped extractor, a frame, a plunger, and a biasing element, where the plunger body and biasing element are assembled outside the weapon, allowing for easy pre-loading and simple disassembly, and a maintenance bore in the slide facilitates tool-assisted disassembly without exposing internal components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a traditional extractor assembly with bearing pin is used, then the extractor can be mounted in the receiver, but the bearing pin is delicate and difficult to dismantle, making cleaning and maintenance hard
Solution Approach 1:
The extractor assembly is divided into separate components: the extractor body, the bearing pin, and the retaining mechanism. This segmentation allows the bearing pin to be easily removed and replaced without dismantling the entire extractor assembly, significantly improving maintenance ease while keeping each component simple in design.
2Volume of moving object
If the extractor assembly is made compact to reduce installation space, then space is saved, but leverage on the extractor is reduced, impairing functioning
Solution Approach 1:
The extractor lever arm is designed to extend in a direction perpendicular to the main axis of the firearm, utilizing vertical space rather than horizontal space. This dimensional change allows the extractor to achieve sufficient leverage length without increasing the overall installation footprint, thus maintaining both compactness and functional reliability.
3Stability of the object's composition
If the bearing pin is designed to be stable and fixed, then the extractor assembly is stable, but it becomes impossible to dismantle under operating conditions, making cleaning and maintenance harder
Solution Approach 1:
The retaining mechanism for the bearing pin is designed to be dynamically changeable: under normal operating conditions, it provides stable fixation to ensure assembly stability; however, when a specific tool is inserted through the maintenance bore, it releases the locking mechanism, allowing easy disassembly for maintenance. This dynamic design resolves the contradiction between stability and ease of disassembly.
4Ease of manufacture
If the extractor assembly is designed with visible bearing opening, then assembly is simple, but the outer contour is not closed and components are exposed to dust and foreign bodies
Solution Approach 1:
The bearing pin and retaining mechanism are nested within the receiver body, with the bearing pin inserted through a maintenance bore that is then sealed. This nesting approach allows the assembly to remain simple while the outer contour becomes closed, protecting internal components from dust and foreign bodies without complicating the manufacturing process.
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 solution reduces production costs, enhances mechanical stability, and provides a closed outer contour, making the extractor assembly easier to manufacture, maintain, and assemble/disassemble while preventing accidental disassembly and protecting internal components from dust and foreign bodies.
Implementation Method 1
A spring applies a force to one lever arm of the extractor, thus pre-loading the second lever arm toward the inside of the weapon
Implementation Method 2
a maintenance bore in a region of the plunger body, such that when the slide is in an installed state, the maintenance bore penetrates the slide from below in the direction of the receiving groove
Data Source
AI summary
Firearms including a slide, an ejector and an extractor assembly, which extractor assembly includes at least one stirrup-shaped extractor, a plunger and a biasing element. Production of such firearms is easier, and their assembly and/or disassembly is simpler, where the plunger includes a plunger body and a plunger extension, a frame is provided for mounting the biasing element and at least the plunger body, the slide includes a receiving groove for the frame, and the slide includes a maintenance bore which, in the installed state, penetrates the slide from below in the direction of the receiving groove and is provided in the region of the plunger body.