Composite Bolt Cutter Structure for Lower Weight and Jaw Alignment
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Solution Overview
Problem
Current bolt cutters are heavy due to thick steel jaws, making them cumbersome for emergency responders, and often have design issues where jaws do not align properly, leading to inefficient cutting.
Innovation Solution
A bolt cutter tool combining lightweight fiber-reinforced composite elements with metal components, including a pair of pivotally mounted jaws with a hardened metal blade and hollow composite handles, along with elastomeric damping and a carry pouch for easy deployment and storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick steel jaws are used in bolt cutters, then cutting strength is improved, but tool weight increases significantly
Solution Approach 1:
The patent applies composite materials by combining fiber-reinforced composite bodies with hardened metal blades and elastomeric damping plugs. The composite body provides structural strength while reducing weight compared to solid steel jaws, and the elastomeric material provides damping to protect the composite from impact damage during cutting operations.
2Weight of moving object
If fiber-reinforced composite materials are used for jaws, then tool weight is reduced, but resistance to off-axis forces decreases
Solution Approach 1:
The patent applies local quality by using different materials in different locations: fiber-reinforced composite for the jaw body where tensile strength is needed, hardened metal blades at the cutting edge where shear strength is needed, and elastomeric damping plugs at impact points where shock absorption is needed. This localized material selection optimizes performance for each specific functional requirement.
Solution Approach 2:
The composite construction combines multiple materials with complementary properties: the fiber-reinforced composite provides lightweight structural strength, the hardened metal provides cutting edge durability, and the elastomeric material provides impact damping. Together they create a jaw assembly that resists both on-axis and off-axis forces effectively.
3Productivity
If jaw alignment is not precise, then cutting efficiency decreases, but manufacturing complexity increases
Solution Approach 1:
The elastomeric damping plugs are installed beforehand in the jaw assembly to compensate for minor alignment variations. The compliant elastomeric material absorbs shocks and accommodates small misalignments between the cutting blades, preventing damage and maintaining cutting efficiency without requiring extremely tight manufacturing tolerances.
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 solution reduces weight while maintaining cutting efficiency and ease of use, addressing the alignment issues and providing a lightweight, effective tool for emergency situations.
Implementation Method 1
an elastomeric damping plug inserted into a proximal opening of at least one of所述 handles
Data Source
AI summary
A light-weight bolt cutter tool includes a pair of opposing pivotally mounted jaws, each made from a fiber-reinforced composite body jacketed by a blade having a hardened metal outer surface oriented to forcibly engage the other one of said jaws. The bolt cutter tool can be actuated by a pair of elongated, hollow fiber resin composite handles. Each handle can include an elastomeric damping plug to prevent debris entering the hollow handle and reduce material fatigue. A quick-deployment, quiver-style backpack can conveniently carry the colt cutters when not in use.