Firearm Recoil Buffer End-of-Stroke Damper
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Solution Overview
Problem
Existing firearm recoil buffer systems often lack effective damping at the end of the stroke, leading to harsh recoil feedback and limited tuning options for different ammunition types.
Innovation Solution
A drop-in end-of-stroke damper unit featuring a housing cup and a resilient elastomeric ring with frustoconical end surfaces, designed to fit within a recoil tube and provide effective damping by compressing and deflecting when impacted by the buffer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coiled compression spring and weighted buffer are used to adsorb recoil force, then the buffer can return the breach into battery, but the buffer reaches full end of stroke and impacts the end of the buffer tube causing harsh recoil feedback
Solution Approach 1:
The patent applies beforehand cushioning by installing a resilient cushion at the end of the buffer tube before the buffer reaches full stroke. This cushion compresses as the buffer approaches end-of-stroke, absorbing impact energy progressively and preventing harsh metal-to-metal impact between the buffer and buffer tube end cap.
Solution Approach 2:
The resilient cushion serves as an intermediary element between the buffer and the buffer tube end cap. Instead of direct contact between hard surfaces, the cushion material deforms to mediate the impact, transforming the harsh mechanical shock into controlled elastic deformation and damping.
2Object-affected harmful factors
If an end cap with resiliency is provided on the buffer, then some damping is achieved, but the effective utility is limited
Solution Approach 1:
The patent extracts the damping function from the traditional end cap and relocates it to a dedicated resilient cushion element positioned within the buffer tube. This separates the primary buffer function from the damping function, allowing each to be optimized independently - the buffer for recoil management and the cushion for end-of-stroke protection.
Solution Approach 2:
The resilient cushion provides localized damping quality precisely where needed - at the end-of-stroke region. The cushion's material properties and geometric configuration are specifically tailored for this localized impact zone, offering superior energy absorption compared to a generic resilient end cap.
3Object-affected harmful factors
If traditional end of stroke dampers are used, then some cushioning is provided, but the device complexity increases and tuning options are limited
Solution Approach 1:
The resilient cushion is nested within the existing buffer tube structure, fitting into the available internal space without requiring external modifications or additional components. This nested arrangement integrates the damping function into the existing buffer system architecture, avoiding increased device complexity.
Solution Approach 2:
The patent enables tuning of the damping characteristics by changing parameters of the resilient cushion such as material durometer, cross-sectional area, and length. These parameter adjustments allow optimization for different ammunition types and recoil requirements without redesigning the entire buffer system.
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 solution provides enhanced recoil damping and reduced harshness, allowing for better firearm control and improved user experience by effectively managing the dynamic energy of the buffer at the end of its stroke.
Implementation Method 1
The cushion is resiliently deformed toward reversing the direction of the frustoconical surfaces in a rearward direction when impacted by the buffer
Implementation Method 2
A resilient cushion is provided that is configured to fit within the housing against the flange. The cushion has a tubular shape with a longitudinal central opening and first and second frustoconical end surfaces
Implementation Method 3
Both of the frustoconical end surfaces extend in a forward direction. The cushion is resiliently deformed toward reversing the direction of the frustoconical surfaces in a rearward direction when impacted by the buffer
Data Source
AI summary
Provided is a drop-in unit end of stoke firearm recoil damper for a firearm having a recoil buffer that linearly reciprocates in a recoil tube. The drop-in damper unit includes a housing cup and a resilient cushion. The cup is configured to fit within a recoil tube and has an internal flange. The resilient cushion is configured to fit within the housing against the flange. The cushion has a tubular shape with a longitudinal central opening and first and second frustoconical end surfaces. Both of the frustoconical end surfaces extend in a forward direction. The cushion is resiliently deformed toward reversing the direction of the frustoconical surfaces in a rearward direction when impacted by the buffer.