Lever Action Firearm Modular Receiver and Cam Link System
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Solution Overview
Problem
Existing lever action firearms are limited in precision, capacity, and material constraints, while semi-automatic AR-15 firearms face ownership and use restrictions, necessitating a modern lever action firearm with select component compatibility.
Innovation Solution
A lever action firearm design featuring an upper frame with a bolt passage, a bolt carrier assembly, a lower frame with a magazine well, and an action lever system that includes interconnected links and a cam path, allowing for reciprocation and enhanced leverage for efficient cartridge handling, while avoiding gas tube interference and enabling compatibility with AR-15 platforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional lever action mechanism is used, then firearm structure is simple and reliable, but precision and capacity are limited
Solution Approach 1:
The firearm is divided into modular components including upper receiver, lower receiver, magazine assembly, and barrel assembly that can be independently manufactured and assembled. This segmentation allows each component to be optimized for its specific function while maintaining overall system precision and simplicity.
Solution Approach 2:
The lever action mechanism is designed to accommodate multiple cartridge types and magazine configurations, making the basic structure universal across different firearm variants. This multi-functionality enables precision improvements without requiring complete redesign of the core mechanism.
2Quantity of substance
If tubular magazine is used, then firearm structure is simple, but capacity is limited
Solution Approach 1:
The magazine system transitions from a fixed tubular structure to a dynamic box magazine that can be easily removed, inserted, and exchanged. This dynamic design allows capacity to be adjusted by changing magazine units without modifying the core firearm structure.
Solution Approach 2:
The box magazine is designed to nest within the lower receiver's magazine well, with the magazine body fitting into a recessed cavity. This nesting arrangement maximizes capacity while maintaining a compact overall structure that does not significantly increase external dimensions.
3Strength
If rear locking blocks are used, then smokeless powder cartridges can be chambered, but action size increases
Solution Approach 1:
The locking mechanism uses asymmetric locking blocks that engage at specific angles and positions, allowing compact action design while maintaining sufficient strength for smokeless powder cartridges. The asymmetric geometry enables efficient force distribution without requiring symmetric expansion of the action.
Solution Approach 2:
The locking blocks utilize three-dimensional engagement surfaces and angular positioning to achieve strong cartridge containment within a compact action volume. By exploiting spatial relationships in multiple dimensions, the design maintains strength without increasing overall action size.
4Ease of operation
If semi-automatic mechanism is used, then ease of use and customization are improved, but ownership and use restrictions increase
Solution Approach 1:
The lever action mechanism is designed to be manually operated through intuitive lever movement that naturally cycles the action, extracts spent cartridges, and chambers new rounds. This self-service design provides ease of use through ergonomic lever positioning and motion without requiring complex automatic mechanisms that would trigger legal restrictions.
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 design enhances precision, capacity, and ease of use by providing a modern lever action firearm with improved bolt carrier velocity and leverage, addressing the limitations of traditional lever action firearms and compatibility with AR-15 systems.
Implementation Method 1
a cam follower on the action lever operably engaged to the cam path such that movement of the action lever between the retracted position and the extended position generates movement of the bolt carrier assembly between the closed position and the open position
Implementation Method 2
an action lever movable between a retracted position and an extended position and having a first pivot, and pivotally connected to the lower frame at the first pivot, a first link pivotally connected to the lower frame, a second link pivotally connected to the bolt carrier assembly, the first link and second link pivotally interconnected to each other
Data Source
AI summary
Lever action firearms have an upper frame defining a bolt passage, a bolt carrier assembly received in the upper frame and operable to reciprocate between an open position and a closed position, a lower frame defining a magazine well configured to removably receive a box magazine, the lower frame removably connected to the upper frame by a transverse takedown pin, an action lever movable between a retracted position and an extended position and having a first pivot, and pivotally connected to the lower frame at the first pivot, a first link pivotally connected to the lower frame, a second link pivotally connected to the bolt carrier assembly, the first link and second link pivotally interconnected to each other, the first link defining a cam path, and a cam follower on the action lever operably engaged to the cam path such that movement of the action lever generates movement of the bolt carrier assembly.