Large-Bore Valve Stem Plug for Rapid Large Tire Inflation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tire inflation devices for large tires, such as those used in the agricultural and off-road vehicles, are inefficient due to restricted air flow, require multiple pieces, and often necessitate additional tools for attachment, leading to increased time and risk of failure.
Innovation Solution
A high air flow valve stem plug with a large bore and reduced thread count, made of cold rolled carbon steel, featuring a textured exterior for easy handling, allowing quick and tool-free attachment to the tire valve stem.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a standard valve stem plug is used for large tires, then the device structure is simple, but the air flow is severely restricted and inflation time is excessive
Solution Approach 1:
The patent changes the critical parameter of bore diameter from standard small dimensions to a large 3/8 inch bore, enabling high air flow volume necessary for rapid inflation of large tires while maintaining a simple single-piece plug structure
2Reliability
If current multi-piece inflation devices are used, then the air flow can be sufficient, but the installation is time-consuming and prone to failure
Solution Approach 1:
The patent merges multiple separate components (adapter, valve core, sealing elements) into a single integrated one-piece plug structure that threads directly onto the valve stem, eliminating connection interfaces and reducing installation to a single threading operation
Solution Approach 2:
The plug is designed with pre-formed sealing surfaces and integrated sealing elements positioned to automatically engage and seal against the valve stem upon insertion, eliminating the need for separate sealing operations
3Strength
If many threads are used inside the nipple for secure attachment, then the connection strength is improved, but the installation time increases
Solution Approach 1:
The patent changes the thread parameter from numerous fine threads to exactly 7 broader threads, optimizing the balance between connection strength and installation speed by reducing the number of threading revolutions required while maintaining adequate engagement
4Ease of operation
If a smooth exterior surface is used on the plug, then the manufacturing is easier, but the handling and grip are difficult
Solution Approach 1:
The patent applies knurling (a textured surface pattern) specifically to the exterior gripping surfaces of the plug where user contact occurs, while maintaining smooth surfaces on internal flow passages and threading areas, thus improving grip without compromising manufacturing simplicity in critical areas
Data Source
AI summary
The present invention is a high air flow valve stem plug that provides a better and more efficient way to inflate large tires, such as those used in the agricultural industry, off-road vehicles, and mining tires. The device comprises a plug having a plurality of female threads located on the interior surface of one end and an unrestricted bore running completely through, the plug. It is a compact large bore plug designed to deliver a maximum unrestricted airflow to the valve stem of large tires. It is attached and removed by hand, eliminating the need for additional tools. The exterior surface of the plug is textured so that it is not smooth or slippery to the touch.