Trigger-Cycled Firearm Bolt Assembly Mechanism

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Solution Overview

Problem

There is a need for a firearm that provides a safe and effective repeating action without being semi-automatic, as semi-automatic firearms are banned in many jurisdictions and existing technologies do not meet these safety and operational requirements.

Innovation Solution

A trigger-cycled firearm design that utilizes a bolt assembly and trigger lever mechanism to manually cycle the action, with safety elements to prevent unintentional discharge, featuring a connector bar and safety elements to ensure the firearm is stored, carried, and operated with an empty chamber, loading only when ready to fire.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If semi-automatic firearm mechanism is used, then repeating action is achieved, but the firearm is banned in many jurisdictions

Engineering Contradiction:

Improverepeating actionVSAvoidlegal availability

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

Instead of using cartridge energy to cycle the action (semi-automatic), the patent inverts the approach by using trigger finger pressure to cycle the action. The trigger lever is mechanically connected to the bolt assembly such that pulling the trigger manually rearwards cycles the bolt, achieving repeating fire without using firearm energy.

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If manual cycling is used, then the firearm is legally available, but the repeating action may be less reliable

Engineering Contradiction:

Improvelegal availabilityVSAvoidrepeating action reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The trigger mechanism serves dual functions: it both fires the cartridge and cycles the action. The trigger lever is connected through the connector bar to the bolt assembly, allowing the same manual input (trigger pull) to both discharge and reload the firearm, simplifying the system while maintaining reliability.

Inventive Principle:

Principle #25Self-service

3Reliability

If safety elements are added to prevent unintentional discharge, then safety is improved, but device complexity increases

Engineering Contradiction:

ImprovesafetyVSAvoidmechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The safety elements (first and second safety elements) are integrated into the existing trigger and bolt assembly structures. The first safety element is part of the trigger lever assembly, and the second safety element is part of the bolt assembly, merging safety functions with operational components rather than adding separate safety mechanisms.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS10816299B2Trigger-cycled firearm

Publication Date: 2020.10.27 FRANKLIN ARMORY HOLDINGS INC

AI summary

Trigger-cycled firearms have a frame, a barrel, a bolt assembly connected to the frame in registration with the barrel and operable to reciprocate between a retracted position and a forward battery position, a trigger lever connected to the frame and operable to move between a forward rest position and a rearward actuated position, and the trigger lever operably connected to the bolt to move the bolt from the forward battery position to the retracted position and to release the bolt to the forward battery position and discharge the firearm in response to movement of the trigger lever from the forward rest position to the rearward actuated position when the bolt is in the forward position. There may be a connector bar pivotally connected to the frame and operably engaged to the bolt assembly and to the trigger lever. The connector bar may be slidably connected to the bolt assembly.