Tool-Less Firearm Pivot Pin With Integrated Removal Channel
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Solution Overview
Problem
Conventional pivot and takedown pins in firearms require specialized tools for installation and removal, and are prone to misplacement or loss due to the small size of detent pins and the need to compress springs, making the process cumbersome and error-prone.
Innovation Solution
The design of improved pivot and takedown pins with modified central channels and installation/removal channels allows for tool-free installation and removal, along with a dedicated removal tool that fits within the pin channels and is stored within the pin for easy access, eliminating the need for external tools and reducing the risk of loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional pivot and takedown pins are used with specialized tools for installation and removal, then secure retention of detent pins is achieved, but the process becomes cumbersome and time-consuming
Solution Approach 1:
The pin design allows the detent pin to be retained within the pin body itself during installation and removal operations. The T-shaped cross-section of the pin creates a corresponding T-shaped recess in the receiver, allowing the detent pin to be captured and held within the pin's own structure rather than requiring separate retention mechanisms or tools.
Solution Approach 2:
The detent pin is nested within the structural geometry of the main pin body. The T-shaped cross-section creates an integrated retention system where the detent pin fits into the recess formed by the pin's own geometry, eliminating the need for external retention structures.
2Reliability
If conventional pins require compression of springs to install detent pins, then secure retention is achieved, but the process becomes error-prone due to small component sizes
Solution Approach 1:
The pin structure itself provides the retention function through its T-shaped cross-section, eliminating the need for separate spring-loaded detent mechanisms. The geometry of the pin creates a self-contained retention system that is both reliable and easy to operate.
Solution Approach 2:
The spring mechanism is extracted from the design entirely. Instead of using a separate spring-loaded detent system that requires compression and precise handling, the retention function is achieved through the geometric interlocking of the T-shaped pin and receiver recess.
3Ease of operation
If specialized removal tools are used for pivot and takedown pins, then complete removal is achieved, but the tools are cumbersome and may cause misplacement or loss
Solution Approach 1:
The pin design allows for tool-free removal by simply pulling the pin outward. The T-shaped recess in the receiver allows the pin to be extracted without requiring specialized removal tools, and the detent pin remains captured within the pin's geometry throughout the process, eliminating the risk of loss.
Data Source
AI summary
An improved pivot pin for a firearm may provide a head, shank, and/or openings. The improved pivot pin may also provide a modified central channel, an installation point, and/or installation channel to allow for tool-free or tool-less installation. Further, the improved pivot pin may provide a removal channel to allow the pivot pin to easily be removed from the lower receiver without tools. An improved takedown pin for a firearm may provide a head, shank, and/or openings. The improved takedown pin may also provide a modified center channel and/or removal channel as well. A removal tool to aid removal of a pivot pin or takedown pin from a firearm may be generally shaped to conform or fit within the channel of the pivot or takedown pin. The width and height of the removal tool may be slightly smaller than the width and height of the channel of the pivot pin or takedown pin. The distal end of the removal tool may taper from a top surface to the bottom surface to form a sharp point or tip. A shank of any conventional or aftermarket pivot pin, takedown pin, or reinstallation tool may be modified to provide a storage cavity sized to receive the removal tool.