Clampable Valve Stem Assembly for Tubeless Tires
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Solution Overview
Problem
Existing externally mountable valve stems for tubeless tires require specialized equipment and skilled personnel for installation and often fail to achieve a proper seal, necessitating tire demounting or bead breaking for access.
Innovation Solution
A clampable valve stem assembly with a hollow metal tube and a flexible compression sleeve that can be externally mounted onto a wheel rim, utilizing a mechanism like a nut to compress the sleeve against the rim, allowing for easy installation without specialized tools or training and ensuring a secure seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a valve stem is installed by inserting it through the opening from the inside of the wheel rim, then the valve stem can be properly positioned, but the tire must be removed from the rim or the bead must be broken free, requiring specialized equipment and skilled personnel
Solution Approach 1:
The valve stem assembly is designed to be installed from the exterior side of the wheel rim rather than from the interior side. The compression sleeve is inserted through the opening from the exterior, and the compression mechanism is operated from the exterior to compress the sleeve against the interior surface of the rim, sealing the valve stem in place without requiring tire removal or bead breaking.
2Ease of operation
If externally mountable valve stems are used, then installation from the exterior is possible, but specialized equipment and skilled personnel are still needed, and a proper seal between the rubber sleeve and metal wheel rim is difficult to obtain
Solution Approach 1:
The compression mechanism allows for adjustment of compression parameters by rotating the nut to the appropriate position, ensuring optimal compression force is applied to the rubber sleeve against the metal rim. This controlled parameter adjustment ensures a reliable seal without requiring specialized equipment or personnel.
3Reliability
If traditional valve stem installation methods are used, then a secure seal can be achieved, but tire demounting and remounting is required, causing vehicle downtime and expense
Solution Approach 1:
The valve stem assembly is segmented into distinct components: a hollow tube, a compression sleeve, and a compression mechanism. This segmentation allows the compression sleeve to be independently compressed against the rim interior from the exterior, creating a reliable seal without requiring removal of the tire from the rim, thus eliminating vehicle downtime associated with tire demounting and remounting.
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
Enables easy and secure installation of valve stems on tubeless tires without specialized equipment, reducing maintenance costs and downtime by allowing exterior access for installation, and providing a reliable air-tight seal without requiring wheel rim modifications.
Implementation Method 1
a mechanism accessible from the exterior side of the container wall to compress the compression sleeve against the interior side of the container wall
Data Source
AI summary
A valve stem having a hollow tube and a compression sleeve mounted to the hollow tube; wherein the hollow tube and compression sleeve are partially insertable through a container wall opening from an exterior side of the container wall through to an interior side of the container wall, and a mechanism accessible from the exterior side of the container wall to compress the compression sleeve against the interior side of the container wall.