Straw Lid Valve Assembly with Self-Adjusting Seal to Reduce Leaks
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Solution Overview
Problem
Traditional straw lid caps with pivoting spouts often experience leaks due to insufficient compression of O-ring seals, which can wear over time, leading to inefficiencies in sealing fluid communication between the drinking vessel and ambient.
Innovation Solution
A straw lid valve assembly featuring a cap, spout, and valve member with a pivotable design, including a valve receiving passage and a vent passage, utilizing a resilient silicone valve member with a flexible sealing ring to provide self-adjusting sealing and mitigate leaks, and a bump for vent closure when the spout is in the closed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an O-ring gasket is compressed between a ball and a cap to create a seal, then sealing is achieved when the spout is in the closed position, but the seal is prone to leaking when compression is insufficient and the O-ring wears over time
Solution Approach 1:
The patent replaces the reusable O-ring gasket with a disposable foam material seal. The foam material is compressed to create a seal and is designed to be replaced periodically, eliminating the wear and compression set issues that plague reusable O-rings. This disposable approach ensures reliable sealing without the degradation problems of traditional elastomeric seals.
Solution Approach 2:
The patent changes the material parameter from elastomeric O-ring to foam material, which has different compression characteristics. The foam material maintains sealing effectiveness over time by being replaced rather than reused, and its compression properties provide consistent sealing without the wear issues of traditional seals.
2Ease of operation
If a spout pivots with respect to the cap, then the spout can move between drinking and closed positions, but the seal becomes misaligned causing leaks
Solution Approach 1:
The patent makes the seal dynamic by allowing the foam material to deform and conform as the spout pivots. The foam's compressibility and ability to reshape enable it to maintain sealing contact throughout the spout's range of motion, accommodating the dynamic movement between drinking and closed positions without misalignment leaks.
Solution Approach 2:
The patent changes the seal material to foam, which has different mechanical properties including compressibility and conformability. These parameter changes allow the seal to adapt to the spout's pivoting motion, maintaining sealing effectiveness despite the dynamic movement and potential misalignment.
3Adaptability or versatility
If a valve member with vent passage is added to the cap, then fluid communication and venting are enabled, but the device complexity increases
Solution Approach 1:
The valve member integrates multiple functions into a single component: it provides fluid communication through the drink passage, venting through the vent passage, and sealing against the cap surface. This multi-functional design adds versatility without proportionally increasing complexity, as one component performs multiple critical functions.
Solution Approach 2:
The patent merges the venting function and fluid communication function into a single valve member component. Rather than adding separate vents and valves, the integrated valve member combines these functions, reducing the overall number of discrete parts while maintaining the required adaptability and versatility.
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 design ensures reliable fluid communication and minimizes leaks by using a self-adjusting seal that conforms to the spout's convex surface, maintaining effective sealing even with misalignment, and allows for easy cleaning and assembly.
Implementation Method 1
utilizing a resilient silicone valve member with a flexible sealing ring to provide self-adjusting sealing and mitigate leaks
Implementation Method 2
The spout connects with the cap and pivots about a pivot axis between a drinking position and a closed position
Data Source
AI summary
A straw lid valve assembly includes a cap, a spout, and a valve member. The cap connects with a drinking vessel and includes valve receiving passage. The spout connects with the cap and pivots between a drinking position and a closed position. The spout includes an inner passage that is in fluid communication with the drinking vessel when in the drinking position and is closed off when in the closed position. The valve member is receivable in the cap and includes a drink passage and a vent passage in fluid communication with the drinking vessel when the cap is connected with the drinking vessel and the valve member is received in the cap. The valve member is receivable in the valve receiving passage such that an uppermost surface of the valve member is exposed to ambient when the spout is in the drinking position and the valve member is received in the cap.