Bolt Carrier Locking Guide With Low-Noise Self-Lubricating Slides
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Solution Overview
Problem
Existing hunting and sporting weapons with longitudinal bolt guidance systems suffer from increased wear, noise, and difficulty in cleaning due to metal-on-metal contact, leading to undesirable cycling noise and potential accidents.
Innovation Solution
Implementing self-lubricating sliding elements, such as plastic or oil-impregnated components, in the bolt carrier guide to reduce friction and noise, and incorporating wiping lips to clean the sliding tracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal-on-metal longitudinal guide is used for bolt carrier, then structural strength is ensured, but wear resistance decreases and noise level increases
Solution Approach 1:
The patent applies composite materials by combining metal (for structural strength) and plastic with PTFE coating (for low friction and wear resistance). The bolt carrier housing uses this composite approach, where the metal provides the necessary strength while the PTFE-coated plastic components reduce wear and friction in the guiding surfaces.
2Strength
If metal-on-metal longitudinal guide is used for bolt carrier, then structural strength is ensured, but noise level increases
Solution Approach 1:
The patent applies composite materials by combining metal (for structural strength) and plastic with PTFE coating (for low friction and wear resistance). The bolt carrier housing uses this composite approach, where the metal provides the necessary strength while the PTFE-coated plastic components reduce wear and friction in the guiding surfaces.
3Ease of operation
If longitudinal guiding structure is used, then bolt carrier guidance is provided, but cleaning accessibility decreases
Solution Approach 1:
The patent applies segmentation by dividing the guiding system into separable components: the bolt carrier housing with its guiding surfaces and the corresponding guides in the receiver. This segmentation allows the bolt carrier housing to be removed and cleaned independently, improving accessibility while maintaining the guidance function.
4Ease of operation
If longitudinal guiding structure is used, then bolt carrier guidance is provided, but friction increases
Solution Approach 1:
The patent applies parameter changes by modifying the surface properties of the guiding surfaces through PTFE coating. This changes the coefficient of friction parameter, reducing friction between the bolt carrier housing and the guides in the receiver, thereby reducing energy loss during operation.
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 a maintenance-free design with reduced wear, silent operation, and improved cleaning capabilities, enhancing the reliability and performance of the weapon.
Implementation Method 1
The invention provides that the sliding elements are covered with a PTFE coating, which exhibits low friction and good wear resistance
Implementation Method 2
such sliding elements are made of a wear-resistant plastic material, in particular a plastic doped with graphite powder
Implementation Method 3
and/or oil-impregnated sliding elements, which, for example, consist of a sintered metal filled with a suitable oil coating
Data Source
Figure 1~2
Figure 3~5A
Figure 6~8
AI summary
Hunting or sporting firearm with a bolt carrier guided longitudinally displaceable on a receiver (5) or receiver of the firearm in the direction of fire (35), which is mounted on the receiver or receiver in the manner of a sliding guide (14, 15), wherein sliding elements (16, 20, 22, 24, 26, 32) are arranged in the sliding guide (14, 15, 40, 41) for noise reduction and improvement of the sliding properties.