Firearm Extractor Device Reducing Size and Contamination

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Solution Overview

Problem

Existing firearm extractor devices are bulky and lack functional safety due to the need for a separate axis of rotation, which complicates the removal of fired cartridges and leads to increased contamination of the firing pin bore.

Innovation Solution

The extractor device eliminates the need for a separate axis by using an extractor spring to bias a guide element within an inner blind hole, allowing the extractor to rotate closer to the barrel and reducing the need for openings in the firing pin bore, thus enhancing closing torque and minimizing contamination.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If a separate axis is used for extractor rotation, then the extractor can be positioned away from the barrel, but the closing torque is reduced and the device size increases

Engineering Contradiction:

Improveclosing torqueVSAvoidextractor device size

Core Design Contradiction:

ForceVSVolume of moving object

Solution Approach 1:

The patent merges the axis function into the control link structure itself. The control link is configured with a bearing surface that directly provides the rotation axis for the extractor, eliminating the need for a separate axis component. This integration allows the extractor to be positioned closer to the barrel while maintaining sufficient closing torque, as the control link serves dual purposes: guiding extractor movement and providing the rotation axis.

Inventive Principle:

Principle #5Merging (Combining)

2Force

If the extractor is positioned closer to the barrel, then closing torque is improved, but the risk of contamination to the firing pin bore increases

Engineering Contradiction:

Improveclosing torqueVSAvoidcontamination of firing pin bore

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The patent segments the extractor structure into distinct functional zones. The extractor body is designed with a specific geometry that separates the rotation axis location from the extractor claw engagement area. The control link with its bearing surface positions the rotation axis in a location that optimizes torque while the extractor claw remains properly positioned to engage cartridge rim without interfering with the firing pin bore, thus preventing contamination.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If traditional extractor design with separate axis is used, then rotation is enabled, but production complexity increases and components are increased by 25%

Engineering Contradiction:

Improveextractor rotationVSAvoidnumber of components

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent combines multiple functions into the control link component. The control link is configured to serve as both the guide for extractor linear movement and the bearing surface for extractor rotation. This merging of functions eliminates the need for separate axis components, reducing the total component count by approximately 25% while maintaining full rotational capability of the extractor.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of operation

If openings are made to the firing pin bore for extractor movement, then extractor function is enabled, but contamination of the firing pin bore occurs

Engineering Contradiction:

Improveextractor movementVSAvoidcontamination of firing pin bore

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent introduces the control link as an intermediary structure that mediates between the extractor and the breech section. The control link with its bearing surface provides the necessary guidance and rotation interface without requiring direct openings to the firing pin bore. This intermediary approach allows extractor movement and rotation while maintaining the integrity and cleanliness of the firing pin bore area.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This design reduces the overall size of the extractor device, improves functional safety, and simplifies production by eliminating 25% of components, while maintaining user detachability and reducing contamination of the firing pin bore.

Implementation Method 1

an extractor spring (120) arranged in an inner blind hole (113) of the extractor (110)

Methodology Applied

Scientific EffectSpring: Spring

Data Source

PatentUS12196509B2Extractor device of a firearm

Publication Date: 2025.01.14 CARL WALTHER GMBH

AI summary

In an extractor device (100) mounted in a breech (300) section of a slide with a lower part with functional elements for interaction with an upper region of a grip part (200) of a firearm with an extractor (110) mounted rotatably about an axis of rotation with an extractor claw (111) provided in the region of an end of the extractor (110) close to the barrel (210) of the firearm and a guide element (112) arranged in the region of an end of the extractor (110) remote from the barrel (210) of the firearm and interacting with an extractor spring (120) biasing the extractor (110), in order to limit a rotational movement of the extractor (110) by contacting a cartridge (400) newly supplied from a magazine. The guide element (112) is biased in the direction of a control link (130) by the extractor spring (120) arranged in an inner blind hole (113) of the extractor, said control link being configured in an extractor pocket (310) in the breech section (300) and forming a bearing of the extractor.