Tire Demounting Tool Multi-Point Rim Contact
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Solution Overview
Problem
Existing tire demounting tools are inefficient due to single-point contact with the wheel rim, leading to rocking, slipping, and increased effort, especially when dealing with tubeless truck tires, where separate tools are needed for each bead and the process is time-consuming and labor-intensive.
Innovation Solution
A tire demounting tool with a handle, a radially extending head, and a bill with a tip and notches that allow for multi-point contact and stable insertion between the tire bead and rim, facilitating easier removal by distributing the force and preventing rocking or slipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a projection is used to extend from the bottom of the flattened portion to create additional leverage, then mechanical advantage is improved, but the tool contacts the wheel rim at a single point causing rocking or slipping
Solution Approach 1:
The invention transitions from a single-point contact (zero-dimensional) to a multi-point contact system (one-dimensional line contact). The flattened portion with its broad surface area contacts the rim along a line rather than at a single point, eliminating rocking and slipping while maintaining mechanical advantage.
2Force
If a bend in the mounting tool working end is used to create a pivot point, then leverage is improved, but the tool provides only a single point of contact with the wheel rim
Solution Approach 1:
The invention replaces the single-point pivot contact with a multi-point contact system. The flattened portion provides extended surface area contact with the rim, allowing the tool to function as a stable lever without rocking, while the bend in the working end maintains the necessary pivot functionality.
3Force
If the downwardly turned tip is used to create a more efficient lever, then mechanical advantage is improved, but insertion becomes difficult and time consuming
Solution Approach 1:
The flattened portion is pre-formed during manufacturing with the correct orientation and geometry. This preliminary preparation allows the tool to be inserted directly between the bead and rim without requiring the user to manually angle or orient the tip, significantly reducing insertion time while maintaining the downwardly turned configuration for efficient leverage.
4Ease of manufacture
If the straight design is used to simplify the tool structure, then ease of manufacture is improved, but the range of motion is limited by contact with the tire tread
Solution Approach 1:
The invention adds a radial extension dimension to the handle, creating a head that protrudes radially outward. This additional dimension allows the bill to be positioned at an optimal angle for leverage while the radially extending head clears the tire tread, providing both simplified construction and enhanced range of motion.
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 tool enables efficient and stable removal of the second tire bead from the rim by providing a secure multi-point contact, reducing effort and time required for demounting, and preventing interference with the tire tread, allowing for smoother operation and improved mechanical advantage.
Implementation Method 1
the tool working end to engage and move a segment of the tire bead inward and allows the tire bead to be stretched over the rim by moving the tool around the periphery of the tire
Implementation Method 2
the user applies pressure on the handle and moves a portion of the working end into contact with the wheel rim, thereby establishing the wheel rim as a fulcrum and making a lever of the tool
Data Source
AI summary
A tire demounting tool for demounting a second bead of a tire from a rim having a flange, the tire demounting tool including a handle; a head extending radially outward as it extends axially outward from the handle; a bill extending axially outward from the head, wherein the bill includes a tip insertable between the second bead and the rim and wherein the head extends radially outward relative to the bill to capture the second bead when the bill is inserted between the rim and the second bead.