Firearm Modular Design Top Safety Compact Length

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Solution Overview

Problem

Existing firearms lack the combination of high precision, variability, short length, and high security, particularly in designs that allow for easy caliber changes and stable operation with heavy recoil.

Innovation Solution

The firearm features a modular design with a shoulder support, magazine shaft, trigger, and safety device positioned on top, allowing for a shorter construction length. It includes a rotary head closure with inclined threaded segments for enhanced locking, and a locking system with a knee lever arrangement for secure operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If the lock and safety device are mounted on the top of the receiver instead of the underside, then the overall length of the firearm is reduced, but the complexity of the trigger mechanism increases

Engineering Contradiction:
Improveoverall lengthVSAvoidtrigger mechanism complexity
Core Design Contradiction:
Length of moving objectVSDevice complexity

Solution Approach 1:

The patent relocates the lock and safety device from the traditional underside mounting to the top of the receiver, utilizing the vertical dimension differently. This dimensional repositioning allows the trigger mechanism components to be arranged in a more compact configuration, reducing the overall length of the firearm while distributing complexity across different spatial planes rather than concentrating it in a single area.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Reliability

If a rotary head closure with inclined threaded segments is used, then the locking reliability is improved, but the manufacturing precision requirements increase

Engineering Contradiction:
Improvelocking reliabilityVSAvoidthreaded segment precision
Core Design Contradiction:
ReliabilityVSManufacturing precision

Solution Approach 1:

The patent employs asymmetric inclined threaded segments on the rotary head closure, where the threads are angled relative to the longitudinal axis rather than being perfectly symmetric. This asymmetric design creates a mechanical advantage that enhances locking reliability through self-locking characteristics, while the specific angle selection balances the manufacturing precision requirements by avoiding overly complex thread geometries.

Inventive Principle:
Principle #4Asymmetry

3Adaptability or versatility

If the firearm is designed to accommodate multiple calibers from .223 Remington to .50 BMG, then the adaptability is improved, but the device complexity increases

Engineering Contradiction:
Improvecaliber compatibilityVSAvoidmodular system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a segmented modular architecture where the firearm is divided into interchangeable components including the barrel, bolt, magazine, and receiver sections. Each segment is designed with standardized interface features that allow different caliber configurations to be assembled by swapping modules rather than redesigning the entire system. This segmentation enables caliber adaptability while containing complexity within discrete, manageable components.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent creates universal interface standards and mounting features that allow a single base platform to support multiple caliber configurations. The receiver, for example, incorporates universal attachment points and dimensional tolerances that accommodate various barrel and bolt assemblies, enabling one firearm chassis to perform multiple functions across different calibers from .223 Remington to .50 BMG without requiring complete redesign.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Ease of manufacture

If the magazine shaft is positioned at the rear transverse limit, then the ease of assembly is improved, but the structural stability under heavy recoil worsens

Engineering Contradiction:
Improveassembly easeVSAvoidrecoil resistance
Core Design Contradiction:
Ease of manufactureVSStrength

Solution Approach 1:

The patent incorporates preliminary reinforcement features at the magazine shaft location, such as pre-stressed mounting points and reinforced receiver walls, that are built into the base structure before the magazine is installed. This preliminary strengthening allows the magazine shaft to be positioned at the rear transverse limit for ease of assembly while the pre-engineered structural support compensates for the potential weakness, maintaining recoil resistance without complicating the assembly process.

Inventive Principle:
Principle #10Preliminary action

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

This design achieves a highly precise and versatile firearm that is compact, secure, and capable of handling various calibers from .223 Remington to .50 BMG, with improved recoil management and ease of assembly.

Implementation Method 1

a rotary head closure (103) with inclined threaded segments (117, 146), wherein the threaded segments (117, 146) are designed with an inclination relative to the longitudinal axis

Methodology Applied
Scientific EffectThreaded engagement: Screw

Implementation Method 2

locking system with a knee lever arrangement for secure operation

Methodology Applied
Scientific EffectMechanical locking: Mechanical Fastener

Implementation Method 3

a recoil spring arranged around the bolt head shaft, wherein the recoil spring is designed to absorb and store mechanical energy from recoil

Methodology Applied
Scientific EffectElastic energy storage: Spring

Implementation Method 4

a control cam to convert linear motion of the bolt into rotational motion of the bolt head

Methodology Applied
Scientific EffectCam mechanism: Cam

Data Source

PatentEP4028710B1Firearm
Publication Date: 2025.05.07 PRAZISIONSTECHNIK VOLKACH WILFRIED ALBER GEORG HOLTHAUS GBR
  • EP4028710B1 patent drawingFigure 1
  • EP4028710B1 patent drawingFigure 2
  • EP4028710B1 patent drawingFigure 3

AI summary

The invention relates to a firearm, in particular for firing cartridge ammunition, having at least one firearm chassis (3), a firearm system support (4), and a firearm system device (5), wherein at least the firearm chassis (3) and the firearm system support (4) have corresponding rasterized engagement means, via which the firearm chassis and the firearm system support can be arranged in axially different positions relative to each other.