Tank Closure Positive Locking Mechanism for Seal Verification
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Solution Overview
Problem
Existing tank closure systems, particularly those with bayonet catches, fail to effectively signal incorrect positioning of the tank cap, leading to potential fuel leaks and increased warranty costs due to unnecessary service visits, as they do not provide a cost-effective means to ensure a fluid-tight seal.
Innovation Solution
A tank closure system featuring a tank cap and flap with a positive locking mechanism, where the outer side face of the tank cap and inner side face of the tank flap engage in a defined shape to ensure correct positioning, preventing the tank flap from closing if the cap is not correctly seated, thus signaling incorrect closure to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a tank cap with bayonet catch is used, then the ease of operation is improved, but the reliability of detecting incorrect positioning deteriorates
Solution Approach 1:
The patent introduces a tank flap as an intermediary element between the user and the tank cap. The flap includes a detection mechanism that senses whether the cap is correctly positioned before allowing the flap to be closed. This intermediary system enables reliable detection of incorrect cap positioning while preserving the ease of operation provided by the bayonet catch mechanism.
Solution Approach 2:
The patent implements a feedback mechanism where the detection device provides information about the tank cap's positioning status. When the cap is incorrectly positioned, the system prevents the tank flap from closing or provides a visual/audible warning to the user. This feedback loop ensures reliable detection while maintaining the simple bayonet catch operation.
2Reliability
If an electronically controlled detection device is installed, then the reliability of detecting incorrect positioning is improved, but the device complexity and cost increase
Solution Approach 1:
The patent replaces complex electronic detection devices with a simpler mechanical detection system. The detection device uses mechanical elements such as a detection arm, cam mechanism, or lever that physically interact with the tank cap to sense its positioning. This mechanical approach achieves reliable detection while significantly reducing device complexity and cost compared to electronic sensors and control systems.
3Reliability
If a conventional screw cap with thread is used, then the reliability of sealing is improved, but the ease of operation deteriorates
Solution Approach 1:
The patent merges the advantages of both screw caps and bayonet catches by combining a bayonet catch mechanism for easy engagement with a sealing element that ensures reliable sealing. The tank cap incorporates a bayonet catch for quick connection and disconnection, while simultaneously including a gasket or sealing rim that provides fluid-tight closure when properly positioned.
Data Source
AI summary
A tank closure system intended for closing a filling opening of a tank includes a tank cap, which closes the filling opening, and a tank flap, which covers the tank cap. The sides of the tank cap and the tank flap that face each other are designed to engage with one another in a positive locking manner by way of a defined shape, when the tank cap is situated in a predetermined position, in which the filling opening is closed, relative to the tank flap.