Quick Connector Coupling With Integrated Check Valve for Leak Prevention
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Solution Overview
Problem
Existing fluid couplings in automotive applications lack a reliable mechanism to ensure secure and leak-proof connection while allowing for quick connection and disconnection, particularly in scenarios where accidental disconnection could lead to fluid leakage or thermal hazards.
Innovation Solution
A quick connect fluid coupling system with a normally closed check valve and a lock shoulder mechanism that ensures fluid flow only when the tubular conduit is fully inserted, utilizing a resilient clip and a check valve with a fluted plunger and O-ring for sealing and retention, which automatically closes upon disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a quick connect fluid coupling is used to allow quick connection and disconnection, then ease of operation is improved, but reliability is worsened due to risk of accidental disconnection and fluid leakage
Solution Approach 1:
The patent applies preliminary anti-action by incorporating a check valve that is预先 configured to close and block fluid flow in the event of accidental disconnection. The valve is positioned and dimensioned so that its closed state prevents fluid leakage before it can occur, counteracting the potential harmful effect of quick disconnect functionality.
Solution Approach 2:
The check valve acts as an intermediary element between the quick connect mechanism and the fluid flow. It mediates the connection state by allowing fluid passage only when properly connected and automatically blocking flow when disconnected, thus ensuring reliability while maintaining ease of operation.
2Reliability
If a check valve is integrated into the coupling to prevent fluid leakage upon disconnection, then reliability is improved, but device complexity is worsened
Solution Approach 1:
The patent merges the check valve function directly into the coupling body structure. The valve is integrated within the housing and works in conjunction with the existing quick connect mechanism, eliminating the need for separate components and reducing overall device complexity while maintaining reliability.
Solution Approach 2:
The coupling structure is designed to serve multiple functions: the housing both contains the quick connect mechanism and houses the check valve. The valve leverages the existing connection geometry, making the structure universal and multi-functional rather than adding separate dedicated components.
3Reliability
If the valve is positioned to open only when conduit is fully inserted, then reliability is improved, but manufacturing precision is worsened
Solution Approach 1:
The system uses self-service by allowing the conduit insertion itself to activate the valve mechanism. The physical act of inserting the conduit to the correct position automatically opens the valve through the interaction of the conduit end and valve actuator, eliminating the need for separate alignment adjustments or complex positioning mechanisms.
Solution Approach 2:
The valve and conduit are designed with matching geometries that create a natural alignment interface. The actuator and conduit end are shaped to work together, creating an equipotential relationship where proper alignment is achieved through the inherent geometry rather than requiring high-precision manufacturing tolerances.
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 system provides a secure, leak-proof connection that automatically shuts off fluid flow upon accidental disconnection, minimizing thermal risks and eliminating the need for separate shipping plugs, while ensuring high sealing capability even under pressure.
Implementation Method 1
The valve has a fluted body that permits fluid to flow around the valve body and through the coupling outlet
Data Source
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AI summary
A fluid coupling has an outlet for receiving the lead end of a tubular fluid conduit having an external locking shoulder. The coupling also holds within it adjacent an outlet a valve body that is normally closed, but is contacted and displaced against the closing force of a bias spring to open the outlet when the conduit is fully inserted and locked into the coupling by way of said locking shoulder.