Angled Gas Ring Sealing for Firearm Bolt Assembly
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Solution Overview
Problem
Conventional gas rings in direct gas firearms suffer from gas blow-by due to radially extending gaps, leading to reduced sealing effectiveness and potential firearm malfunction, which can be hazardous.
Innovation Solution
The use of sealing rings with angled gaps, such as three rings with 45-degree angled gaps where the middle ring is flipped to 90 degrees, or two rings with different angles, minimizes gas blow-by by preventing gap alignment and enhancing sealing between the bolt and chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If radially extending gaps are used in gas rings for installation and cleaning, then ease of manufacture and maintenance is improved, but gas seal effectiveness deteriorates due to gas blow-by
Solution Approach 1:
The gas rings are designed with non-radial, asymmetric gap configurations including offset radial gaps, tangential gaps, and angled gaps. This asymmetry prevents gap alignment between adjacent rings while maintaining ease of installation and cleaning, thereby eliminating gas blow-by paths without compromising accessibility for maintenance.
Solution Approach 2:
The invention transitions from simple radial gap configuration to multi-dimensional gap arrangements including offset radial, tangential, and angled gaps. This dimensional change in gap orientation prevents alignment of gaps across multiple rings, blocking gas escape paths while preserving the open-gap design benefits for installation and cleaning.
2Reliability
If gas rings are installed in a staggered manner to prevent gap alignment, then gas seal effectiveness is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
Each gas ring is manufactured with an asymmetric gap pattern (offset radial, tangential, or angled gaps) that inherently prevents alignment with adjacent rings. This built-in asymmetry eliminates the need for complex staggered installation procedures, reducing assembly complexity while maintaining reliable gas sealing.
Solution Approach 2:
The gap configuration is optimized locally at each ring position with specific non-aligned orientations. This local quality variation in gap angles and positions ensures that gaps never align across the stack, providing reliable sealing without requiring complex overall assembly arrangements.
3Reliability
If continuous wire rings are used to prevent gas blow-by, then gas seal effectiveness is improved, but reliability deteriorates due to thermal expansion binding
Solution Approach 1:
The continuous wire ring is segmented into multiple separate gas rings with gaps. This segmentation allows each ring to expand independently during firing cycles without binding, while the multiple rings with non-aligned gaps collectively prevent gas blow-by, eliminating the thermal expansion problem of continuous rings.
Solution Approach 2:
The gas rings serve multiple functions simultaneously: they provide gas sealing through non-aligned gap configuration, accommodate thermal expansion through segmented design with clearance, and maintain bolt reciprocation. This multi-functionality replaces the single-function continuous ring that failed under thermal stress.
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 configuration effectively prevents gas blow-by, ensuring reliable operation of the firearm by maintaining consistent bolt reciprocation and preventing jamming or manual cycling, thereby ensuring safe and consistent firearm function.
Implementation Method 1
The expanding gas passes through the key, which is typically a cylindrical hollow rod and enters a chamber in the carrier group. The increase in gas pressure in the chamber causes the bolt to move away from the battery position toward a recoiled position.
Data Source
AI summary
A bolt assembly for a direct gas firearm includes a plurality of sealing rings. In an embodiment, there are three rings with ring gaps cut at about a 45 degree angle and the middle ring is flipped so that the angle of the gap of the middle ring is approximately 90 degrees from the angle of the gap of the two outer rings. In an embodiment, the angle of the ring gap of at least one of the plurality of sealing rings is between 0 and 90 degrees and the ring is configured so that the ring gap is minimized once the ring is installed.