Firearm Delay Mechanism With Tapered Buffer Cavity
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Solution Overview
Problem
Automatic firearms have high firing rates, leading to decreased accuracy and increased ammunition consumption, and are sensitive to ambient conditions and accessories, necessitating a mechanism to control firing rates and reduce cycle rate variability.
Innovation Solution
A firearm mechanism featuring a bolt carrier, buffer, and weight system with a damping mechanism, including a tapered buffer cavity to reduce kinetic energy and control the firing rate, utilizing a valve arrangement to pressurize the buffer cavity and adjust the timing delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high firing rate is used in automatic firearms, then productivity is improved, but accuracy deteriorates
Solution Approach 1:
The buffer cavity cross-sectional area is made variable rather than constant, allowing the damping characteristics to change dynamically with the weight's position and velocity. This dynamic geometry enables optimization of both high-rate fire performance and accuracy by adapting the damping force to the specific operational phase.
Solution Approach 2:
The invention changes the geometric parameter of the buffer cavity from a constant cross-section to a variable cross-section that changes along the length. This parameter change allows the system to provide different damping levels at different stages of the recoil and return cycle, resolving the contradiction between high firing rate and accuracy.
2Adaptability or versatility
If ambient conditions and accessories are present, then the firearm operates in real-world conditions, but cycle rate variability increases
Solution Approach 1:
The variable cross-sectional buffer cavity provides automatic feedback control of the cycle rate. As the weight moves through the buffer, the changing cross-section creates a damping force that automatically adjusts to the incoming kinetic energy, stabilizing the cycle rate without external control systems or sensors.
Solution Approach 2:
The buffer cavity geometry itself provides the stabilization function through its variable cross-section design. The system uses its own structural features to regulate the cycle rate, eliminating the need for external accessories or complex control mechanisms, thereby maintaining reliability while accepting ambient conditions.
3Device complexity
If a constant cross-sectional buffer cavity is used, then the structure is simple, but the damping effectiveness is insufficient
Solution Approach 1:
The buffer cavity employs a curved, tapered cross-sectional area that varies along its length, replacing the simple cylindrical constant cross-section. This curved geometry increases the surface area for gas compression and creates more effective damping forces, improving kinetic energy dissipation while maintaining a relatively simple integrated structure.
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 mechanism effectively reduces the firing rate variability, enhancing accuracy and ammunition efficiency by damping the weight's kinetic energy, allowing for adjustable firing rates and minimizing the impact of ambient conditions and accessories.
Implementation Method 1
The buffer cavity comprises a damping mechanism comprising a reduction in a cross-sectional size of the buffer cavity
Implementation Method 2
damping the weight's kinetic energy
Implementation Method 3
the damping mechanism and weight comprise a valve arrangement arranged to pressurize the buffer cavity
Implementation Method 4
The buffer cavity comprises a tapered portion
Data Source
AI summary
In some embodiments, a firearm mechanism comprises a bolt carrier comprising a bolt carrier cavity, a buffer comprising a buffer cavity and a weight arranged to travel between the bolt carrier cavity and the buffer cavity. The buffer cavity comprises a damping mechanism comprising a reduction in a cross-sectional size of the buffer cavity. In some embodiments, the damping mechanism and weight comprise a valve arrangement arranged to pressurize the buffer cavity and damp kinetic energy carried by the weight.