Integrated Firearm Extractor With Elastic Leg Biasing
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Solution Overview
Problem
Reliable extractor operation in semiautomatic firearms is compromised by the complexity of existing extractor mechanisms, leading to frequent stoppages due to failures in extracting spent cartridges, such as the 'stovepipe' jam, which can hinder quick clearing of the firearm.
Innovation Solution
A simplified extractor design featuring a hook with an elongated strap and a projection that engages with the slide, utilizing a leg and beam configuration to provide biasing force through a ramp surface and pivot mechanism, reducing the number of parts and enhancing engagement reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simplified extractor design with fewer parts is used, then device complexity is reduced, but reliability may worsen due to increased extraction failures
Solution Approach 1:
The patent combines multiple functions into a single integrated extractor body. The extractor includes a hook for engaging the cartridge rim, a biasing element integrated into the body for applying extraction force, and a ejector interface all merged into one component. This eliminates the need for separate biasing springs and multiple discrete parts, reducing device complexity while maintaining reliability through the unified design that ensures consistent engagement and extraction force application.
2Device complexity
If the extractor uses integrated biasing without discrete springs, then device complexity is reduced, but the biasing force consistency may worsen
Solution Approach 1:
The patent changes the physical state and configuration of the biasing element from a discrete spring to an integrated elastic or resilient structure within the extractor body. The biasing element is configured to provide consistent extraction force through its material properties and geometric design, ensuring reliable engagement with the cartridge rim while maintaining force consistency without requiring separate spring components.
Solution Approach 2:
The extractor body is designed as a composite structure combining rigid and resilient materials or regions. The integrated biasing element utilizes materials with specific elastic properties that allow it to maintain consistent biasing force while being integrated into the extractor body, achieving both simplified design and reliable force application.
3Ease of manufacture
If the extractor design is simplified with fewer components, then ease of manufacture is improved, but manufacturing precision requirements may worsen
Solution Approach 1:
While the extractor is an integrated component, the design incorporates distinct functional zones and features such as the hook geometry, biasing element positioning, and ejector interface that can be manufactured using standardized processes. The segmented functional areas allow for precise manufacturing of each feature while maintaining overall design simplicity, balancing ease of manufacture with engagement precision.
Solution Approach 2:
The extractor is designed as a universal component that performs multiple functions (engagement, extraction, ejection) through a single integrated structure. This multi-functionality reduces the number of parts and simplifies manufacturing while the standardized interface features ensure consistent engagement precision across different cartridge types and firearm models.
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 extractor design enhances the reliability of cartridge extraction, reducing stoppages and improving the uninterrupted cycling of semiautomatic firearms by ensuring consistent engagement and ejection of spent cartridges.
Implementation Method 1
the leg acts as a spring to bias the hook toward a cartridge rim
Implementation Method 2
the ramp surface redirects a cartridge rim to flip the extractor counterclockwise
Data Source
AI summary
An extractor for a semiautomatic firearm has an elongated strap with a hook at one end and a projection at an opposite end. The hook engages the rim of a chambered cartridge and the projection is received within a recess in the slide. A notch in the strap engages a pin in the slide to retain the extractor. One end of a leg is attached to the strap near the hook, the opposite end of the leg engages the slide. The leg acts as a biasing spring to bias the hook into engagement with the cartridge.