Delayed Blowback Firearm Mobile Mass Counterweight Mechanism
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Solution Overview
Problem
Existing delayed blowback mechanisms in firearms are unsuitable for modern ammunition due to their design based on outdated combustion times and gas volumes, leading to excessive recoil and muzzle climb, particularly in automatic pistols.
Innovation Solution
A novel mechanism using a mobile mass that reacts to firing to counteract recoil and muzzle jump forces, reducing the time of bolt restraint and dissipating energy through a distinct movement independent of the bolt, allowing for a lighter and more compact firearm design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional delayed blowback mechanisms are used, then firearms can be designed with simpler structures, but recoil and muzzle climb become excessive with modern ammunition
Solution Approach 1:
The invention divides the mobile bolt into two independent mass centers: the bolt itself and a separate counterbalancing mass. This segmentation allows each component to perform its specific function - the bolt for firing control and the counterbalancing mass for recoil reduction - thereby reducing overall recoil and muzzle climb while maintaining structural simplicity
Solution Approach 2:
The invention introduces a counterbalancing mass that moves in opposition to the bolt's rearward motion during firing. This counterweight mechanism generates forces that counteract the recoil and muzzle climb produced by modern high-power ammunition, effectively reducing the harmful effects while preserving the simplicity of the blowback system
2Object-affected harmful factors
If heavier bolts are used to maintain acceptable ballistic characteristics, then recoil control improves, but firearm weight and volume increase
Solution Approach 1:
By separating the bolt mass from the counterbalancing mass, the invention allows the bolt to remain lightweight while the counterbalancing mass independently provides recoil control. This segmentation eliminates the need for a heavy bolt, thereby reducing overall firearm weight while maintaining acceptable recoil characteristics
Solution Approach 2:
The counterbalancing mass serves as a dedicated recoil control component that compensates for the reduced bolt weight. By positioning and moving this counterweight in opposition to the bolt's motion, the system achieves effective recoil control without requiring the bolt itself to be heavy, thus reducing overall firearm weight
3Object-affected harmful factors
If multiple mobile parts are used in delayed blowback systems, then force control improves, but device complexity and volume increase
Solution Approach 1:
The invention merges the recoil control function with the existing blowback mechanism by integrating a counterbalancing mass into the bolt assembly. This consolidation achieves improved force control through coordinated motion of the bolt and counterbalancing mass, while avoiding the need for separate complex mechanisms, thereby maintaining a relatively simple structure with fewer mobile parts
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
Significantly reduces recoil and muzzle climb by distributing and redirecting the energy produced by powder ignition, enabling the use of lighter bolts and more compact firearm designs while maintaining control and precision.
Implementation Method 1
employs a mobile mass that reacts to firing in a manner to counteract recoil and muzzle jump forces
Implementation Method 2
A mobile bolt configured to move along the axis of the barrel from a forward to a rearward position, or in translational movement along the axis defined by the barrel, and capable of pushing against or striking the mobile mass at the forward position or during movement from its forward-most position to a rearward position
Data Source
AI summary
The mechanism comprises a main frame (1) and its extension (1′), which accommodate a barrel (21) with fixed mounting, a mobile bolt (22) and its guiding pin ensemble (66) and main spring (67) moving in the main frame (1), a mobile mass (34) and its assembly of guiding pin (60), push plate (61) and return spring (62), and a mobile mass catch sear (42) and its spring (7). The mobile mass pivots from a first position under the barrel to a downward position in reaction to the backward movement of the mobile bolt. The placement of the mobile mass in front of the chamber directs counteracting forces down on the barrel to prevent muzzle climb during operation.