Roller-Delayed Bolt Assembly for Multi-Caliber Reliability
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Solution Overview
Problem
Modern firearms face challenges in adapting their operating systems to various calibers due to the mass of the cartridge, requiring adjustments for suitable function and delay between firing and rearward movement of the bolt, which complicates compatibility and reliability.
Innovation Solution
A roller delayed operating system utilizing a forward bolt, carrier, short cam pin, and bearings, with a deployed and retracted configuration, allowing for modular firearm components and simplified design that accommodates different calibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If blowback or gas pressure operating systems are used to accommodate various calibers, then caliber compatibility is improved, but adjustments are necessary for each caliber to ensure suitable function and delay, increasing device complexity
Solution Approach 1:
The operating system is divided into modular components including a bolt assembly, carrier, cam pin, and roller delay mechanism. Each component can be independently configured or replaced to accommodate different calibers without requiring adjustments to the entire system, thereby reducing complexity while maintaining versatility
Solution Approach 2:
The roller delay mechanism with cam pin is designed to provide universal delay functionality across multiple calibers. The mechanism uses a spring-loaded roller that can be adjusted in position along the cam pin to provide the appropriate delay for different cartridge masses, eliminating the need for separate adjustment mechanisms for each caliber
2Reliability
If roller delayed operating system with cam pin is implemented, then reliability and safety are improved, but device complexity increases due to additional components
Solution Approach 1:
The cam pin and roller delay mechanism are integrated into the existing bolt and carrier assembly. The cam pin is positioned within the carrier, and the roller operates within the bolt assembly, combining multiple functions into a compact integrated unit that adds reliability without proportionally increasing overall system complexity
Solution Approach 2:
The roller acts as an intermediary element between the firing mechanism and the bolt movement. It provides a controlled delay by rolling along the cam pin surface, mediating the transfer of energy from the cartridge gas pressure to the bolt rearward movement, thereby improving reliability through controlled timing
3Device complexity
If traditional operating systems are used, then simpler design is achieved, but compatibility with various calibers is reduced due to mass differences
Solution Approach 1:
The roller delay mechanism provides dynamic adjustment capability where the roller position along the cam pin can be changed to accommodate different cartridge masses. This dynamic configurability allows a single simple design to adapt to various calibers, maintaining design simplicity while achieving versatility
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 system enhances reliability and safety by simplifying the operating system, enabling compatibility with multiple calibers and reducing the need for additional venting holes, thus increasing the longevity of the firearm.
Implementation Method 1
a plurality of bearings
Data Source
AI summary
An operating system for a firearm includes a forward bolt includes a forward bolt cavity, a carrier disposed on a rear side of the forward bolt, the carrier including a carrier cavity, a short cam pin including (i) a forward section that is at least partially disposed within the forward bolt cavity and (ii) a rear section that is at least partially disposed within the carrier cavity, a plurality of bearings that interface with the forward bolt, a retracted configuration where the short cam pin is in a rear position relative to the forward bolt, and a deployed configuration where the short cam pin is in a forward position relative to the forward bolt.