Pivotable Gas Selector with End Stop for Carbine
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Solution Overview
Problem
Existing gas-operated firearms face challenges in cost-effective production, reliability, ease of cleaning, and tool-free adjustment of gas pressure, particularly in field conditions, due to complex and unreliable gas selector mechanisms.
Innovation Solution
A pivotable gas selector with a locking system and end stop allows for tool-free, one-handed adjustment of gas pressure without intermediate positions, featuring a self-sealing mechanism to prevent gas leakage, and an improved haptic surface for secure operation in adverse conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a slidable gas selector is used without an end stop, then the gas flow can be adjusted, but the gas selector may tilt during sliding which impairs functionality and causes uncontrolled gas escape
Solution Approach 1:
The patent applies preliminary action by providing an end stop that pre-defines the limits of the gas selector's movement range. This prevents the selector from tilting or moving beyond acceptable positions during adjustment, ensuring reliable sealing and functionality while maintaining ease of operation.
2Adaptability or versatility
If threaded fasteners are used to mount gas selectors, then the gas flow can be regulated, but the production costs increase due to elaborate and expensive thread production
Solution Approach 1:
The patent applies segmentation by dividing the gas selector into modular components that can be mounted using simple fasteners rather than expensive threaded connections. This maintains the adaptability of gas flow regulation while significantly reducing manufacturing complexity and cost.
3Ease of operation
If a gas selector is made slidable for field adjustment, then tool-free adjustment is enabled, but automatic sealing is lost and gas flow escapes sideways in an uncontrolled manner
Solution Approach 1:
The patent applies self-service by designing the gas selector with an automatic sealing mechanism that activates during the sliding adjustment process. The selector itself performs the sealing function without requiring external tools or additional components, enabling tool-free adjustment while preventing uncontrolled gas escape.
4Adaptability or versatility
If rotatable or screwable gas selectors are used, then gas flow can be regulated through different bore diameters, but adjustment is only possible in disassembled state requiring tools
Solution Approach 1:
The patent applies dynamics by transitioning from a static rotatable/screwable gas selector to a dynamic slidable design. This allows the gas selector to move along a guide during field operations, enabling tool-free adjustment of gas flow regulation while maintaining adaptability through different bore diameters.
Data Source
Figure 1~2
Figure 3~4d
Figure 5~7b
AI summary
The invention concerns a carbine having a gas system, which guides gas selectively from the gas removal bore (13) to a gas pipe (5), with a platelet (4), movable between at least two positions in the gas system, In order to come to a simple solution, the platelet (4) is pivotable about a pivot axis pin (9). A stop pin (10), parallel to the pivot axis pin (9), protrudes into a stop bore (18) of the platelet (4), thus delimiting the pivoting; the platelet (4) has at least two recessed catch positions (17), into which a catch (7), under the effect of a catch spring (8), optionally engages, provided that the gas through-bore (20) associated with the catch (7) comes to rest in alignment between the gas bores (23, 24) when the catch (7) engages in one of the recesses.