Firearm Ejector Detachable Mounting via Slanted Notch

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Solution Overview

Problem

Existing fixed position firearm ejectors are not easily detachable by users and lack resistance to displacement during extended use.

Innovation Solution

A detachable firearm ejector system utilizing a single transverse retaining screw that spans across the frame mount section, with a base section and protruding fingers and posts for secure engagement, providing adjustable tension to resist displacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a traditional fixed position ejector is used, then the ejector remains stable during firearm use, but the ejector is difficult to detach and replace by the user

Engineering Contradiction:

ImproveEase of ejector detachmentVSAvoidEjector retention stability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The ejector is designed as a separable component with distinct retention elements (posts with notches) that can be independently engaged and disengaged from the firearm frame, allowing user detachment while maintaining operational stability during use

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A retaining screw acts as an intermediary element that secures the ejector to the firearm frame by engaging with the notched posts, providing a reliable connection that can be easily installed and removed by the user

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If a traditional ejector retention method is used, then the ejector is securely retained, but the ejector is resistant to displacement only after complex installation

Engineering Contradiction:

ImproveEase of ejector installationVSAvoidEjector retention under heavy use

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

Instead of requiring complex installation procedures to ensure retention, the design inverts the approach by using simple geometric features (notched posts engaging with a retaining screw) that provide secure retention through their inherent structure, making installation trivial while maintaining reliability under heavy use

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS11953275B1Fixed position firearm ejector

Publication Date: 2024.04.09 JOHNSON SEAN VERN

AI summary

A fixed position ejector detachably connectable to a firearm is disclosed. The ejector comprises a base having an elevated forwardly extending finger, wherein the finger has an outer finger face configured for contacting a cartridge or case during the ejection phase of the firing cycle of the firearm. The base has forward and rear downwardly extending posts that are configured to engage into respective forward and rear retaining post holes positioned on the upper frame surface. At least one of the forward and rear posts includes a downwardly slanted notch. A retaining screw is provided to adjustably engage into both (i) a through-hole positioned adjacent and perpendicular to the upper frame surface of the firearm, and (ii) the slanted notch of one of the forward and rear posts such that the retaining screw urges the bottom base surface of the base against the upper frame surface of the firearm.