Asymmetric Snap-In Valve for Vehicle Wheels
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Solution Overview
Problem
The existing 'Snap-In' valve designs for tubeless vehicle tires face instability and potential breakage due to centrifugal forces at high speeds, especially when integrated with pressure sensors, leading to leaks and seal damage, and are costly due to multi-component assembly.
Innovation Solution
The design features an asymmetric 'Snap-In' valve with a reduced volumetric mass in the internal region of the bulb near the rim, creating a mass imbalance to counteract centrifugal forces and facilitating easier mounting by reducing the bulb's volume in this area, allowing it to cooperate more effectively with the rim's hole and bottom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the valve is designed as a Snap-In type with a groove cooperating elastically with a hole in the rim, then the mounting operation is simplified to a single step without intermediary elements, but the valve becomes unstable at high speeds due to centrifugal forces
Solution Approach 1:
The patent applies asymmetry by creating an asymmetric bulb shape where the internal region (facing the rim interior) has reduced volumetric mass compared to the external region. This asymmetric mass distribution generates a counterbalancing moment that offsets the destabilizing centrifugal forces acting on the pressure sensor box, thereby maintaining valve stability at high speeds while preserving the simple Snap-In mounting mechanism
Solution Approach 2:
The reduced mass in the internal region of the bulb acts as a counterweight to balance the centrifugal forces generated by the pressure sensor box at high speeds. This counterbalancing effect prevents the valve from becoming unstable and reduces the risk of breakage, allowing the valve to remain stable without requiring additional intermediary mounting elements
2Stability of the object's composition
If the thickness of the rubber on the bulb and groove is increased to counteract centrifugal forces, then the valve stability improves, but the introduction effort during mounting increases
Solution Approach 1:
Instead of uniformly increasing the rubber thickness throughout the bulb and groove, the patent applies local quality by reducing the volumetric mass specifically in the internal region of the bulb while maintaining or optimizing the rubber properties where needed. This localized modification provides the necessary counterbalancing effect without unnecessarily increasing overall rubber thickness, thereby maintaining ease of mounting while improving stability
3Adaptability or versatility
If the valve is integrated with a pressure sensor box, then the functionality is enhanced, but the mass increases causing greater destabilization at high speeds
Solution Approach 1:
The asymmetric bulb design with reduced internal region mass specifically counteracts the destabilizing effect of the integrated pressure sensor box. The mass reduction creates a counterbalancing moment that offsets the centrifugal forces generated by the sensor box, allowing the enhanced functionality to be maintained without compromising valve stability at high speeds
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
This asymmetric design enhances stability and reduces the risk of breakage and leaks, while maintaining single-operation mounting without additional intermediary elements, thus improving performance and durability.
Implementation Method 1
a groove, produced at the base of a bulb extended by a rubbery coating of an internal nozzle of the valve, said groove cooperating elastically with a hole in the rim, on the periphery of which it becomes housed by force, thanks to the elastic deformation of the groove
Implementation Method 2
the centrifugal force destabilizes the unit due to the tendency to raise the box in the direction of the periphery of the wheel
Implementation Method 3
the volumetric mass of the bulb is smaller in its region directed toward the interior of the rim, by comparison with its region directed toward the exterior, this reduction taking place in the vicinity of the groove
Data Source
AI summary
A valve of the “Snap-In” type is intended to be mounted directly on the rim of a vehicle wheel fitted with a “tubeless” tire. The valve is secured to the rim through which it passes via a groove produced at the base of a bulb extended by a rubbery coating of an internal nozzle of the valve. The groove collaborates elastically with a hole in the rim, on the periphery of which hole it becomes lodged, the mass or the volume of the bulb being smaller in its region (A) toward the interior of the rim by comparison with its region (B) directed toward the exterior, this reduction taking place near the groove intended to collaborate with the hole in the rim, both in the part thereof that surrounds the nozzle and in the part thereof that is in contact with the bottom of the rim.