Tire Lever Bead Holder with Rounded Head

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Solution Overview

Problem

Current tools and techniques for mounting tires are complex and require milling, making it difficult to position the top bead of the tire onto a rim, which can result in damage or inability to maintain tire pressure.

Innovation Solution

A tire lever with a bead holder featuring a rounded head and receiving area that fits over a tire rim flange, using the flange as a fulcrum to push the tire bead towards the rim's center, eliminating the need for complex machinery or milling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional tire levers are used, then tire mounting can be performed, but the top bead is difficult to position and may cause damage to the tire or rim

Engineering Contradiction:
Improvetire mounting reliabilityVSAvoidbead positioning ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The bead holder features a rounded head instead of a conventional flat or sharp edge. This curved surface allows the bead holder to smoothly engage with and maneuver the stiff top bead of the tire, preventing damage while facilitating proper positioning on the rim flange.

Inventive Principle:
Principle #14Spheroidality (Curvature)

2Manufacturing precision

If complex machinery or milling is used for tire mounting, then precise bead positioning can be achieved, but the device complexity and manufacturing cost increase

Engineering Contradiction:
Improvebead positioning precisionVSAvoidmounting device complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The tire lever is divided into distinct functional segments: a simple lever body for applying force and a separate bead holder with the rounded head for precise bead engagement. This segmentation allows each component to be simple in design while collectively achieving precise bead positioning without requiring complex machinery or milling operations.

Inventive Principle:
Principle #1Segmentation

3Manufacturing precision

If complex machinery or milling is used for tire mounting, then bead positioning can be improved, but manufacturing cost increases

Engineering Contradiction:
Improvebead positioning precisionVSAvoidtool manufacturing ease
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The bead holder is designed as a separate, simple component that can be manufactured using basic machining operations rather than complex milling. The segmented design allows the rounded head feature to be produced independently and attached to the lever body, significantly reducing manufacturing complexity and cost while maintaining precise bead positioning capability.

Inventive Principle:
Principle #1Segmentation

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

Facilitates efficient tire mounting and dismounting without damaging the rim, reducing manufacturing costs and improving the ease of use compared to conventional methods.

Implementation Method 1

the rounded head pushes a bead of the tire towards a center of the rim while using the flange as a fulcrum

Methodology Applied
Scientific EffectLever: Lever

Implementation Method 2

using the flange as a fulcrum to push the tire bead towards the rim's center

Methodology Applied
Scientific EffectMechanical Advantage: Mechanical Advantage

Data Source

PatentUS10766318B2Tire lever
Publication Date: 2020.09.08 SNAP ON INC
  • US10766318B2 patent drawing
  • US10766318B2 patent drawing
  • US10766318B2 patent drawing

AI summary

A tool, such as a tire lever, with a bead holder having a rounded head and a receiving area. In an embodiment, the tool has a first end that includes a tapered tip and a second end that is coupled to the bead holder. The receiving area of the bead holder fits over a flange of a rim such that the rounded head pushes a bead of a tire toward a drop center of the rim while using the flange as a fulcrum.