Recoil Buffer Assembly with Dual Springs
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Solution Overview
Problem
Blowback firearms experience greater recoil due to high bolt masses, leading to sharper and more unpleasant recoil for the shooter, which can affect accurate aiming and handling.
Innovation Solution
A recoil buffer assembly comprising a first spring with a lower spring constant, a second spring with a higher spring constant, and an elastomeric buffer positioned between them, which cushions the impact of the recoiling bolt and absorbs recoil forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high bolt mass is used to slow bolt movement in blowback firearms, then the bolt can counteract recoil forces and allow projectile exit, but the recoil felt by the shooter becomes greater and sharper
Solution Approach 1:
The patent introduces a recoil buffer assembly as an intermediary component between the bolt and the firearm receiver. This buffer assembly includes a buffer member and a spring mechanism that mediates the interaction between the recoiling bolt and the stationary receiver, absorbing impact forces and reducing the sharp recoil felt by the shooter while maintaining reliable bolt movement control
Solution Approach 2:
The patent applies beforehand cushioning by positioning a buffer member and spring assembly in advance within the receiver to cushion the bolt's rearward movement. The spring is pre-loaded to engage before the bolt reaches its full rearward travel, providing progressive cushioning that reduces peak impact forces and thereby reduces perceived recoil
2Object-affected harmful factors
If a resilient material buffer system is used to cushion bolt impact, then some recoil is absorbed, but insufficient force is absorbed resulting in more recoil transferred to the shooter
Solution Approach 1:
The patent employs a composite buffer system combining a buffer member made of elastomeric or polymeric material with a spring mechanism. This composite approach leverages the energy absorption capabilities of both the resilient buffer material and the mechanical spring, providing superior recoil absorption compared to single-material systems while ensuring reliable force reduction
Solution Approach 2:
The patent utilizes parameter changes by selecting specific spring constants for the buffer spring based on the bolt mass and operating conditions. The spring constant is optimized to provide appropriate cushioning throughout the bolt's rearward travel, ensuring sufficient force absorption while maintaining reliable recoil reduction performance
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 recoil buffer assembly effectively reduces the perceived recoil felt by the shooter, improving marksmanship, speed of shooting, and overall handling of the firearm.
Implementation Method 1
a first spring configured to cushion an impact of a recoiling bolt
Implementation Method 2
an elastomeric buffer positioned between them, which cushions the impact of the recoiling bolt and absorbs recoil forces
Implementation Method 3
a second spring configured to act between an end of the firearm and the buffer
Data Source
AI summary
A recoil buffer assembly for cushioning the impact of recoiling components of a firearm. The recoil buffer assembly comprises a first spring, a second spring, and a buffer. The first spring extends along a first axis. The second spring extends along the first axis. The buffer is positioned between a first end of the second spring and a second end of the first spring. The first spring is configured to act between the buffer and a bolt within the firearm. The second spring is configured to act between an end of the firearm and the buffer. A receiver assembly and firearm comprising the recoil buffer assembly are also included.