Firearm Recoil Mechanism with Nested Springs

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Solution Overview

Problem

Conventional recoil mechanisms for firearms are complex, bulky, heavy, and difficult to maintain, with limited customization options, making them inefficient in managing recoil forces.

Innovation Solution

A recoil mechanism comprising a hollow cylinder with an outer spring and a rod assembly, featuring a preassembled design for easy disassembly, cleaning, and customization, with adjustable springs or compliant balls to manage recoil energy effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional recoil mechanisms are used, then recoil forces can be managed, but the mechanism becomes complex, bulky, heavy, and difficult to maintain

Engineering Contradiction:
Improverecoil management effectivenessVSAvoidmechanism complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The recoil mechanism is divided into separate modular components including an outer spring, inner spring, rod assembly, and hollow cylinder that can function independently yet work together as a system. This segmentation allows each component to be optimized individually while reducing overall system complexity and improving maintainability.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mechanism employs a nested structure where the inner spring and rod assembly are positioned within the hollow cylinder, and the outer spring surrounds these internal components. This nested arrangement reduces the overall footprint and eliminates the need for separate housing structures, thereby reducing complexity and weight while maintaining effective recoil management.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Reliability

If conventional recoil mechanisms are used, then recoil forces can be managed, but the mechanism becomes bulky and heavy

Engineering Contradiction:
Improverecoil management effectivenessVSAvoidmechanism weight
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The nested arrangement of springs and rod assembly within the hollow cylinder maximizes space utilization and eliminates redundant structural elements. This compact configuration significantly reduces the overall weight of the recoil mechanism while maintaining its structural integrity and functional effectiveness.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

By segmenting the mechanism into essential functional components only (outer spring, inner spring, rod, cylinder), unnecessary structural weight is eliminated. Each component is optimized for its specific function rather than being part of a monolithic heavy structure.

Inventive Principle:
Principle #1Segmentation

3Reliability

If conventional recoil mechanisms are used, then recoil forces can be managed, but the mechanism is difficult to maintain and has limited customization

Engineering Contradiction:
Improverecoil management effectivenessVSAvoidmaintenance difficulty
Core Design Contradiction:
ReliabilityVSEase of repair

Solution Approach 1:

The segmented modular design allows individual components such as springs and rod assembly to be independently accessed, removed, cleaned, lubricated, or replaced without disassembling the entire mechanism. This significantly easees maintenance procedures and reduces downtime.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mechanism incorporates adjustable elements that allow users to modify spring tension, rod length, or component configuration to customize recoil characteristics for different ammunition types or shooting applications, while maintaining ease of adjustment through simple modular interfaces.

Inventive Principle:
Principle #15Dynamics

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 mechanism is more efficient, cost-effective, and customizable, providing improved recoil management with reduced complexity and maintenance requirements.

Implementation Method 1

A proximal end of the outer spring is positioned against the flange and a distal end of the outer spring is positioned against the inner surface of the slide. An inner spring can be positioned within the hollow cylinder.

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

A proximal end of the outer spring is positioned against the flange and a distal end of the outer spring is positioned against the inner surface of the slide

Methodology Applied
Scientific EffectSpring: Spring

Implementation Method 3

A rod spring can be positioned within the hollow cylinder about the rod

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 4

A rod spring can be positioned within the hollow cylinder about the rod

Methodology Applied
Scientific EffectSpring: Spring

Data Source

PatentUS20250020427A1Recoil mechanism for a firearm
Publication Date: 2025.01.16 DPM SYSTEMS TECHNOLOGIES USA LLC
  • US20250020427A1 patent drawing
  • US20250020427A1 patent drawing
  • US20250020427A1 patent drawing

AI summary

A recoil mechanism has a hollow cylinder having a first portion adjacent to a closed end having a first inner diameter and a second portion adjacent to an open end having a second inner diameter, and an outwardly facing flange at the open end thereof. An outer spring is positioned over the hollow cylinder and has a second end in contact with the outwardly facing flange. A rod assembly includes a rod coupled to an endplate at a first end thereof and an enlarged portion towards a second end thereof, a washer mounted on the rod between the enlarged portion and the endplate, and a rod spring mounted over the rod between the small washer and the endplate. Moreover, the rod assembly is positioned within the hollow cylinder by inserting the second end of the rod into the open end of the hollow cylinder.