Beadlock Assembly Double-W Stitching Low Pressure Security
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Solution Overview
Problem
Existing beadlock assemblies fail to securely maintain tires on rims at low inflation pressures due to the weakness of stitching methods, leading to eventual failure and loss of tire security.
Innovation Solution
The use of an overlapping double-W stitching method for joining flat webbing to form a cylindrical tread, providing a stronger interface joint and increased bobbin tension, which buries the stitching and makes it less vulnerable to scuffing and wear, combined with a beadlock assembly comprising an inner tube, beadlock case, and beadlock air channel to secure tire beads to the rim.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If normal-to-the-tread webbing edge parallel stitches are used to join the flat webbing overlap, then the manufacturing process is simple, but the interface joint strength is insufficient leading to eventual failure of the beadlock case
Solution Approach 1:
The patent applies composite construction by combining multiple layers of flat webbing material with overlapping edges, joined through a sophisticated stitching system that integrates the webbing layers into a unified cylindrical tread structure. This composite approach creates a stronger interface joint that distributes stress across multiple layers rather than relying on a single stitching line.
Solution Approach 2:
The patent transitions from simple parallel stitching to a three-dimensional double-W stitching pattern that creates an interlocking structure. The W-shaped stitches penetrate through multiple webbing layers in an alternating pattern, creating a volumetric joint that resists separation forces more effectively than planar stitching arrangements.
2Reliability
If the stitching is exposed on the surface of the beadlock case tread, then the manufacturing process is simpler, but the stitching is vulnerable to scuffing and wear when the tire goes flat
Solution Approach 1:
The patent incorporates protective layers of webbing material that overlie the stitching joints before the tire enters flat conditions. This protective layering is built into the structure during manufacturing, creating a cushion that prevents direct contact between the stitching and abrasive surfaces when the tire collapses under vehicle weight.
Solution Approach 2:
The patent creates a multi-layer composite structure where protective webbing layers are positioned to cover and shield the stitching joints. This composite construction integrates the protective function directly into the tread structure, eliminating the need for separate protective components while enhancing durability.
3Strength
If single-layer webbing is used to form the beadlock case tread, then the structure is simpler, but the interface joint cannot withstand the tremendous force exerted by high inner tube pressure
Solution Approach 1:
The patent employs multi-layer webbing construction where multiple flat webbing strips are overlapped and joined through the double-W stitching system. This composite structure distributes the tremendous forces from high inner tube pressure across multiple layers and stitching points, preventing any single point from bearing the full load.
Solution Approach 2:
The patent divides the continuous webbing into multiple discrete strips or segments that are overlapped and joined through stitching. This segmentation allows the structure to flex and distribute stress more effectively than a single continuous piece, while the overlapping joints create multiple load paths through the stitching system.
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 beadlock assembly effectively secures tire beads to the rim even at low inflation pressures, providing a strong and durable connection that resists wear and scuffing, ensuring the tire remains securely attached to the rim.
Implementation Method 1
increased bobbin tension that serves to bury the stitching. This burying of the stitching makes it less vulnerable to scuffing and wear
Implementation Method 2
A tremendous force is exerted on the ends of the tread at this webbing interface joint as a result of the relatively high inner tube pressure
Data Source
AI summary
A dual, internal, pneumatic, boltless beadlock assembly for effectively securing a tire to a rim is disclosed. The beadlock assembly exerts a force on the two circumferential inner beads of a tire such that the tire stays in secure contact with the rim, even when the inflation pressure of the tire is not sufficient to lock the tire to the rim.